The two independent components of Projectile motion in 2D plane are horizontal and vertical.
Projectile motion is nothing but a form of motion experienced by an object or particle that is projected in a gravitational field, such as from Earth's surface, and moves along a curved path under the action of gravity only. It means the object is thrown from earth and due to the gravity object is again coming back to earth.
When object is moving up, the velocity it has can be derived into its components horizontally and vertically because velocity is a vector quantity.
V = Vx + Vy
where V is the resultant vector and Vx and Vy are the horizontal and vertical components of the velocity.
Hence the two independent components of Projectile motion in 2D plane are horizontal and vertical.
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How fast would a light beam appear to einstein if he were traveling in the same direction at 90% of the speed of light?.
If Einstein were traveling in the same direction of a light beam at 90% of the speed of light, the light beam would be travelling at 10% of speed of light.
Speed of light, c = 3 * 10⁸ m / s
90 % of Speed of light = 3 * 10⁸ * 0.9
90 % of Speed of light = 2.7 * 10⁸ m / s
Relative speed = 3 * 10⁸ - 2.7 * 10⁸
Relative speed = 0.3 * 10⁸ m / s
Relative speed = 0.1 c = 10% of speed of light
Relative speed of one object with respect to another is the difference in speeds of both objects if they are travelling in same direction. Relative speed of one object with respect to another is the sum of speeds of both objects if they are travelling in opposite direction.
Therefore, if Einstein were traveling in the same direction of a light beam at 90% of the speed of light, the light beam would be travelling at 10% of speed of light.
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a small block is attached to an ideal spring and is moving in shm on a horizontal, frictionless surface. the amplitude of the motion is 0.210 m and the period is 3.08 s.
On a perpendicular, frictionless surface, moving in shm is equal to a = 0.563 m/s2, and v = 0.225 m/s.
EE₀ = EE + KE, ½ kA² = ½ kx² + ½ mv², ω²A² = ω²x² + v², v = (1.88 rad/s) √((0.200 m)² − (0.160 m)²)= 0.225m/s.
What is the definition of an amplitude simple?In physics, amplitude refers to the greatest displacement or distance that a point on a vibrating object or wave can move relative to its equilibrium location. It is equivalent to the vibration path's half-length.
What is the purpose of amplitude?Amplitude is a platform for product analytics that enables companies to track customers using group analytics. The platform employs behavioral reports to analyze how people interact with items and offers real-time tips to speed up work.
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A long, hollow wire has inner radius R1 and outer radius R2. The wire carries current I uniformly distributed across the area of the wire.
a) Use Ampere's law to find an expression for the magnetic field strength in the region 0
Express your answer in terms of the variables R1, R2, r, I, and appropriate constants.
b) Use Ampere's law to find an expression for the magnetic field strength in the region R1
Express your answer in terms of the variables R1, R2, r, I, and appropriate constants.
c) Use Ampere's law to find an expression for the magnetic field strength in the region R2
Express your answer in terms of the variables R1, R2, r, I, and appropriate constants.
Just info given, no diagrams.
Obviously, the answer to A is 0, since no magnetic field exists in the center of the hollow wire, but I don't have a clue on where to begin for the equations to B and C.
Option a Use Ampere's law to find an expression for the magnetic field strength in the region 0 Express your answer in terms of the variables R1, R2, r, I, and appropriate constants. 0<r<R1
The magnetic field in the region R2 < r is calculated by using the Ampere’s law, the current flowing the region R2 < r is equal to the current enclosed by the loop.Use the current density expression to calculate the total current enclosed by the loop.Use the Ampere’s law to find the expression for the strength of magnetic field in the different region of the loop.
the expression for current density.
J=I/A
the expression for the Ampere's law
∫Bdl=μ₀I
An electric current's ability to produce a magnetic field is inversely proportional to the size of the electric current, with the constant of proportionality being equal to the permeability of free space. We can connect electricity and magnetism thanks to Ampere's Law, which gives us a mathematical relationship between magnetic fields and electric currents.
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a certain amount of nobr(g) is sealed in a flask, and the temperature is raised to 350 k. the following equilibrium is established: nobr(g) uv no(g) 1 12 br2(g) the total pressure in the flask when equilibrium is reached at this temperature is 0.675 atm, and the vapor density is
The partial pressures of each species of the equilibrium are
NOBr = 0.39 atmNO = 0.19 atmVapour density = 2.219 g / L
Temperature = 350 K
Total pressure = 0.675 atm
Since volume of flask is constant and the mass is conserved,
Initial mass of NOBr = 2.219 g
1 mol NOBr = 109.92 g
Number of moles of NOBr = 2.219 / 109.92 = 0.02019 mol
Total number of moles at equilibrium is,
[tex]n_{total}[/tex] = ( 0.02019 - x ) + x + 0.5 x
[tex]n_{total}[/tex] = 0.02019 + 0.5 x
Acording to ideal gas equation.
[tex]n_{total}[/tex] = P V / R T
[tex]n_{total}[/tex] = ( 0.675 * 1 ) / ( 0.08206 * 350 )
[tex]n_{total}[/tex] = 0.00662
Partial pressure of NOBr,
P = ( 0.02019 - x ) * 0.675 / ( 0.02019 + 0.5 x )
P = 0.39 atm
Partial pressure of NO,
P = x * 0.675 / ( 0.02019 + 0.5 x )
P = 0.19 atm
Partial pressure of Br₂,
P = 0.5 x * 0.675 / ( 0.02019 + 0.5 x )
P = 0.095 atm
Therefore, the partial pressures of
NOBr = 0.39 atmNO = 0.19 atmBr₂ = 0.095 atmThe given question is incomplete. The complete question is:
A certain amount of NOBr(g) is sealed in a flask, and the temperature is raised to 350 K. The following equilibrium is established:
NOBr(g) ↔ NO(g) + ½ Br2(g)
NOBr(g)↔NO(g)+½Br2(g)
The total pressure in the flask when equilibrium is reached at this temperature is 0.675 atm, and the vapor density is 2.219 g L^-1. Calculate the partial pressure of each species.
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A person is swimming 1.3 m beneath the surface of the water in a swimming pool. A child, standing on the diving board, drops a ball into the pool, directly above the swimmer. The swimmer sees the ball dropped from a height of 4.1 m above the water. From what height was the ball actually dropped? Express your answer in meters.
The ball was actually dropped from a height of 5.453 meters.
What is refractive index?It is the ratio of the speed of light in a vacuum to that in a second medium with a higher density. The symbol n or μ is more frequently used to represent the refractive index variable.
Given in the question,
The apparent depth ([tex]v[/tex]) = 4.1 m
The depth of the person = 1.3 m
Actual depth ([tex]u[/tex]) = ?
We know,
Refractive index of air ([tex]n_{w}[/tex]) = 1
Refractive index of water ([tex]n_{a}[/tex]) = 1.33
We also know,
[tex]\frac{u}{v} =[/tex] [tex]\frac{n_{w} }{n_{a} }[/tex]
or, [tex]u=v\frac{n_{w} }{n_{a} }[/tex]
Substituting the values in the above equation we get,
[tex]u[/tex] = 4.1×1.33
Hence, [tex]u[/tex] = 5.453 m
So, the actual depth is 5.453 meters.
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Water -Block A block is submerged in a container of water and remains at rest with the only forces exerted on it being gravity and forces exerted by the water. The force exerted by the water on the bottom of the block is greater than the force exerted by the water on the top of the block. Which of the following is an explanation of the microscopic cause of the difference in the forces? The block exerts a downward force on the water equal to the block's weight. The net force exerted by the water on the block is equal in magnitude and opposite in direction to the force the block exerts on the water, as required by Newton's third law. The molecules of water hitting the bottom of the block have a greater average speed than those hitting the top of the block, and thus they exert a greater force. ni The contact force between the water and the bottom of the block is fundamentally due to interatomic electric forces.
It is the contact force between the water and the bottom of the block is fundamentally due to interatomic electric forces.
A force is basically the interactions between bodies, these interactions creates binding energy between two surfaces that can be formed and broken too, the friction force is the macroscopic sum of all these microscopic interactions between two different surfaces. The magnitude of the friction force is dependent on the type of surface, if we talk about rough surface, the interaction area is high, therefore the frictional force will be high, whereas on smooth surfaces the interaction area is small, therefore the force is small.
Hence, the force exerted by the water on the bottom of the block is greater than the force exerted by the water on the top of the block as the contact force between the water and the bottom of the block is fundamentally due to interatomic electric forces.
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At a time t = 2.60 s , a point on the rim of a wheel with a radius of 0.240 m has a tangential speed of 54.0 m/s as the wheel slows down with a tangential acceleration of constant magnitude 10.2 m/s2 .\ Part ACalculate the wheel's constant angular acceleration.Part BCalculate the angular velocity at t = 3.40s .Part CCalculate the angular velocity at t=0.Part DThrough what angle did the wheel turn between t=0 and t = 3.40s ?Part EPrior to the wheel coming to rest, at what time will the radial acceleration at a point on the rim equal g = 9.81m/s2 ?
A) Constant angular acceleration of wheel, α= 42.5 rad/s² B)ω= 191 rad/sec C)ω= 335.5 rad/sec D)Ф = 895.05 rad E)t = 6.09 sec
What is angular acceleration?Angular acceleration is a quantitative expression of the change in angular velocity of spinning object per unit time.
A)Given a= 10.2 m/s^2 and radius= 0.240m
α= a / r
= 10.2/0.240
α= 42.5 rad/s²
The constant angular acceleration of the wheel is 42.5 rad/s².
B)The tangential speed v is
v = vt + a ( t -t0)
= 54 + (-10.2)(3.40 - 2.60)
= 54- 8.16
v= 45.84 m/s
angular velocity is
ω= v / r
= 45.84/0.240
ω= 191 rad/sec
C) Angular Velocity at t=0:
tangential speed v is
v = vt + a ( t -t0)
= 54 + (-10.2)(0 - 2.60)
= 80.52 m/s
angular velocity is given as,
ω= v / r
= 80.52/0.240
ω= 335.5 rad/sec
D)Angle at wheel turned is calculated by the formula :
Ф = ωΔt + 1/2 *α (Δ t)²
Δt = 3.4 - 0= 3.40
Ф= (191 * 3.4) +1/2* 42.5 * (3.4)²
=649.4 + 245.65
Ф = 895.05 rad
E)Radial acceleration is equal to the acceleration due to gravity and can be written as,
α1= ω2 r
ω2 = √g/r
= √9.8/0.240
= 6.39 rad/sec
time taken by the wheel to reach from ω to ω2 is calculated as
ω2 = ω+αt
t= (ω2- ω)/t
= 6.39- 335.5 / -54
= 329.11/-54
t = 6.09 sec
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write a function swaparrayends() that swaps the first and last elements of the function's array parameter. ex: sortarray
The function for SwapArrayEnds is given below.
Algorithm
1. Define an array and all of its components.
2. Design a function with two pointer variables as parameters.
3. Prior to calling this procedure, make a temporary variable. The value from the first pointer is then assigned to this temporary variable.
4. The value at the first pointer now becomes that at the second pointer.
5. The value of the temporary variable is then changed at the second pointer.
6. In order to swap an element, follow these steps, and pass two pointer variables pointing to the element you want to swap to the main() function.
The code for the implementation of the SwapArrayEnds method is given below.
#include<stdio.h>
vid SwapArrayEnds(int sortArray [], int SORT_ARR_SIZE){
//Declare tempVariable as an integer type
if(SORT_ARR_SIZE > 1) {
tempVariable = sortArray[0];
sortArray[0] = sortArray[SORT_ARR-SIZE-1];
sortArray[SORT_ARR_SIZE -1] = tempVariable;
}
}
int main(void){
const int SORT_ARR_SIZE = 4;
int sortArray[SORT_ARR_SIZE];
int i = 0;
sortArray[0] = 10;
sortArray[1] = 20;
sortArray[[2] = 30;
sortArray[3] = 40;
SwapArrayEnds ( sortArray[, SORT_ARR_SIZE);
for( i =0; i < SORT_ARR_SIZE; ++i){
printf("%d", sortArray[i]);
}
printf("\n');
return 0;
}
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the current in a solenoid is decreased to one-half of its original value. which one of the following statements is true concerning the self-inductance of the solenoid?
The correct statement is : The self inductance does not change.
What is a solenoid ?A solenoid is a coil of wire that is typically cylindrical in shape and serves as a magnet when a current flows to draw a moving core into the coil. They are employed particularly as switches or controls for mechanical devices (such as a valve).
The strength of the magnetic field generated by the solenoid depends on the number of windings. The square of the number of coil turns will determine its inductance. A stronger electromagnetic field results from adding more field lines and more coils.
The coil's length ought to be greater than its diameter. The magnetic field that surrounds a solenoid that conducts current. These appear to be comparable to a bar magnet.
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Can be used to calculate the density D of an object with mass m and volume V which is an equivalent equation solved for V?.
The equivalent equation for V is V = m/d.
The density of a substance is the connection between the mass of the substance and what sort of space it takes up (quantity). The mass of atoms, their length, and how they may be organized decide the density of a substance.
Density is a vital concept because it lets us decide what materials will drift and what substances will sink whilst positioned in a liquid.
The density will increase as pressure increases. Altitude and climate structures can alternate the air's strain. As you move better, the air's strain decreases from around 1,000 millibars at sea level to 500 millibars at around 18,000 ft.
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two sound waves produce a beat frequency of 5 hz. if one of the original frequencies is 227 hz, what could be the other frequency?
A 5 hz beat frequency is created by two sound waves. One frequency is 264 Hz if one of the original frequencies was 227 Hz. It follows that the other frequency must be 269 Hz.
fbeat = I f2 - f1 I
we have fbeat = 5 Hz.
and one frequency is 264 Hz So, other frequency must be 269 Hz
therefore difference in frequencies will be equal to 5Hz = fbeat.
A phenomenon known as "beating" or "producing beats" occurs when two sound waves of different frequencies come close to your ear and interfere in a manner that alternates between being constructive and destructive. The absolute difference between the two waves' frequencies is what determines the beat frequency.Like sound, light, radio, or ultraviolet waves, all of our thoughts and feelings have a certain frequency. Whether we're conscious of it or not, whatever we think about or feel becomes real.
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The registered nurse (RN) is orienting a new RN assigned to the care of a client with a cardiac disorder and is told that the client has an alteration in cardiac output. After educating the new RN about cardiac output, which statement made by the new RN indicates the need for further instruction?
1. "A cardiac output of 2 L/min is normal."
2. "A cardiac output of 4 L/min is normal."
3. "A cardiac output of 6 L/min is normal."
4. "A cardiac output of 7 L/min is normal."
The statement made by the new registered nurse indicates the need for further instruction is : A cardiac output of 2 L/min is normal
What is a cardiac output?Heart rate (HR) and stroke volume (SV) are combined to form cardiac output, which is expressed in liters per minute. The most typical definition of HR is the number of heartbeats per minute. SV is the amount of blood that is ejected from the heart with each heartbeat or during ventricular contraction.
However, our heart typically beats 70 times per minute. In order to calculate cardiac output, which is the total amount of blood the left ventricle expels in a minute, we must multiply the stroke volume by the heart rate, or the number of beats per minute.
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Given small samples of three liquids, you are asked to determine their refractive indexes. However, you do not have enough of each liquid to measure the angle of refraction for light refracting from air into the liquid. Instead, for each liquid, you take a rectangular block of glass (n= 1.52) and place a drop of the liquid on the top surface of the block. You shine a laser beam with wavelength 638 nm in vacuum at one side of the block and measure the largest angle of incidence for which there is total internal reflection at the interface between the glass and the liquid (Figure 1). Your results are given in the table (Figure 2). What is the refractive index of liquid A at this wavelength? What is the refractive index of liquid B at this wavelength? What is the refractive index of liquid C at this wavelength?
At this wavelength, liquid A has a refractive index of 1.4 for liquid A, liquid C has a refractive index of 1.4, and liquid B has a refractive index of 1.35 for liquid A.
In optics, an optical medium's refractive index, also known as refraction index, is a dimensionless number that indicates how well the medium bends light. How much light is bent or refracted when it enters a material depends on the material's refractive index.
In physics, the wavelength is the length over which a periodic wave repeats, or its spatial period. It is the separation between adjacent spots on a wave that correspond to the same phase. Is called wavelength.
TETHTA = 36.3
366.3 = SIN^-1(1.52^2 - Nc^2)
36.3 = sin^-1(1.52^2 - Nc^2)
Nc = (1.52^2 - (sin36.3^2) = 1.399 = 1.4
Nc = 1.4
similarly, for A and B the refractive index of liquid.
Nb = 1.35, Na = 1.4
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How much current is drawn from a circuit that has a resistor of 1000 ohms if powered by a battery with 1. 5 volts *?.
The current drawn from the circuit is 0.0015 Ampere.
Solution:
v = 1.5 V
r = 1000 ohm
Using formula:
i = v/r
= 1.5 / 1000
= 0.0015 A
A resistor is an electrical component that limits or regulates the flow of current in an electronic circuit. Resistors can also be used to supply specific voltages to active devices such as transistors. The resistor slows down the flow of electrons so the current doesn't move too fast and damages things like batteries on a breadboard.
The second reason to use resistors is to slow the flow of current through the component. A passive electrical device with two terminals is used to limit or regulate the flow of current in an electrical circuit. The main purpose of resistors is to reduce current flow and reduce the voltage in certain parts of the circuit.
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the following expressions are for kinetic energy (k), spring potential energy (usp), and gravitational potential energy (ug): k
The kinetic energy of an object is equal to 1/2mv^2, where m is the mass of the object and v is the velocity of the object.
The spring potential energy of an object is equal to 1/2kx^2, where k is the spring constant and x is the displacement of the object from the equilibrium position. The gravitational potential energy of an object is equal to mgh, where m is the mass of the object, g is the acceleration due to gravity, and h is the height of the object.
The Three Types of EnergyThere are three types of energy that are important in physics: kinetic energy, spring potential energy, and gravitational potential energy. Kinetic energy is the energy of motion, spring potential energy is the energy stored in a spring, and gravitational potential energy is the energy associated with gravity.
Kinetic energy is important because it is the energy that objects have when they are in motion. The kinetic energy of an object is equal to 1/2mv^2, where m is the mass of the object and v is the velocity of the object. This means that the kinetic energy of an object increases as the mass of the object increases or as the velocity of the object increases.
Spring potential energy is important because it is the energy that is stored in a spring. The spring potential energy of an object is equal to 1/2kx^2, where k is the spring constant and x is the displacement of the object from the equilibrium position. This means that the spring potential energy of an object increases as the spring constant increases or as the displacement of the object from the equilibrium position increases.
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in the picture above you step barefoot onto hot sand. the sensory nerves on the bottom of your feet send a signal to your brain at 113.5 m/s. if the nerve signal path length is 1.3 m long, how long does it take for the signal to reach your brain in seconds?
The total time taken by the signal to reach the brain is 0.011 seconds.
What is Speed ?Speed (S) is a concept of motion that determines how fast or slow an object is moving from one point to another.
What is Distance ?Distance (D) can be defined as the amount of space that exists between any two points.
Time (t) is the progression of events.
There is a direct relationship between the three basic variables of speed, distance and time. It is given by :
Speed = Distance/Time
i.e. S = D/t
Given, distance(D) of the nerve signal path length is 1.3 m and speed(S) of the signal from bottom of feet is 113.5 m/s.
Using the above equation, we get
S=D/t
⇒t=d/S
⇒t=1.3/113.5
⇒t=0.011 sec
So the total time taken by the signal to reach the brain is 0.011 seconds.
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How are solar cells and battery similar in function?.
The cells in a solar panel are designed to generate electricity.
A solar cell is a device that is added to a photovoltaic system to store the excess electricity generated by the solar panel. This stored energy can be used to power your home at night, on cloudy days, during power outages, or when your solar panels aren't producing enough power.
When the electricity produced by the solar panel is not used immediately the battery converts the direct current to alternating current and stores it for later use. Basically, the solar panel charges the battery when you don't need to use the energy produced. Unlike batteries and fuel cells solar cells do not use chemical reactions to produce electricity do not require fuel and generators have no moving parts.
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Describe the water cycle. Use the terms gravity, energy from the sun, evaporation, condensation, precipitation, runoff, and storage in your explanation.
There are four main parts to the water cycle are Evaporation, Convection, Precipitation and Collection.
What is water cycle ?The movement of water from the surface of the Earth to the atmosphere and back is modelled by the water cycle. Liquid water evaporates as a result of the Sun's energy becoming water vapor. When water vapour rises into the atmosphere, it cools, condenses, and eventually turns into ice crystals or tiny liquid droplets.
Clouds develop during this condensation-related process. Water can be released from clouds as precipitation, returning from the atmosphere to the surface of the Earth. The water may evaporate from the surface and find its way into groundwater or other types of storage reservoirs.
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The staples inside a stapler are kept in place by a spring with a relaxed length of 0. 115 m. If the spring constant is 51. 0 n/m, how much elastic potential energy is stored in the spring when its length is 0. 150 m?.
The elastic potential energy is 0.57375 J when spring constant is 51 with length of 0.150m.
Unless you take action to alter it, an object's overall energy level remains constant. You must move an object (such as by pushing it) in order to alter its energy.As the ball's velocity rises, its potential energy—which it acquires when it is raised above its resting position—transforms into kinetic energy and back again.[tex]\\U=\frac{Kl^2}{2}[/tex]
K is spring constant , l is length of spring and U is elastic potential energy.
U= 51 x 0.150 x 0.150/2
U=0.57375 J
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An ice cube i melting but doe not change in temperature. Complete the gap to tate the name given to the energy that i needed to melt the ice cube: latent __________. (Hint: your anwer hould be three word. )
The gap to tate the name given to the energy that i needed to melt the ice cube: latent heat of fusion.
The temperature stays consistent at some stage in ice melting due to the fact the warmth furnished to ice is used for the transition of country instead of growing the ice temperature.Temperature stays consistent whilst the melting factor is reached. This is due to the fact, the warmth supplied is used to alternate the country from stable to liquid and thus, the temperature stays consistent.
Latent warmth of fusion of ice is 33600 JKg - 1 .Energy is needed to soften a stable due to the fact the cohesive bonds among the molecules withinside the stable ought to be damaged aside such that, withinside the liquid, the molecules can flow round at similar kinetic energies; thus, there's no upward thrust in temperature.
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a star has a radial velocity of 30 km/s and a transverse velocity of 40 km/s. what is its total velocity relative to earth?
The total velocity of the star relative to Earth is 50 km/s.
What is the total velocity relative to earth?The total velocity relative to earth is calculated by determining the resultant velocity of the star as shown below.
V² = Vr² + Vt²
V = √(Vr² + Vt²)
where;
V is the total velocity of the star relative to earthVr is radial velocity of the starVt is the transverse velocity of the starV = √(Vr² + Vt²)
V = √(30² + 40²)
V = 50 km/s
Thus, the total velocity of the star relative to Earth is a function of the relative velocity of the star.
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a particle moves in a straight line, parallel to the x axis, from xi to xf. it is acted upon by a force that is also parallel to the x axis and is giv
Migration of the electron between xi = L towards xf = 3L based on the supplied statement.
What does force signify in science?In science, the term "force" has a particular definition. At this point, it is quite acceptable to refer to a force as a push or possibly a pull. There is no such thing as a charge that an instrument "seems to have in it" or "contains." The idea of a force encompasses both living and non-living things.
What causes the balancing force?One definition of equilibrium is a state of equilibrium forces. Because when forces are in equilibrium, there is no direction change. The sum of balanced forces is always equal to zero.
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in class, we measured the period of the large hz amp pendulum (the bowling ball hanging from the ceiling) and found a value of 5.5 s. what is the length of the cord that holds the bowling ball in m? ignore damping due to air drag.
The length of the cord that holds the bowling ball is 7.52 m.
A pendulum is made when the bowling ball hanging from the ceiling. Under the influence of gravity, the pendulum can swing back and forth. The period for a pendulum depends on the length of the cord and the acceleration due to gravity.
[tex]T = 2 \pi \sqrt{\frac{L}{g}}[/tex]
π = 3.14L = the length of the cord (m)g = acceleration due to gravity = 9.8 m/s²T = the period of a pendulum (s) = 5.5 sT² = 4π² ×L/g
T²g = 4π² L
5.5² × 9.8 = 4 × 3.14² × L
30.25 × 9.8 = 4 × 9.8596 × L
L = 296.45 ÷ 39.4348
L = 7.52 m
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If the cell i 1. 5V & there are 4 cell - what i the total potential difference (in volt) of the circuit?
If the cell of 1.5 volts have 4 cells then the potential difference of the circuit is 6 volts.
As per question,
Voltage of each cell = 1.5 volts.
Number of cell = 4
Potential difference = 4 x 1.5
= 6 volts.
The potential difference between any two points in a circuit represents the variation in the energy that charge carriers have accessible. Volts are measured as follows: Voltage is measured in volts and is defined as the potential difference (V). The phrase used to describe the external work required to convey a charge from one point to another in an electric field is electric potential difference, which is frequently referred to as voltage. A battery's potential difference is equal to the sum of the potential differences of all of the electrical cells that make up the battery, which are connected in series. The resultant potential difference is the potential difference of the battery.
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mr. smith frequently fails to notice that students at the back of the room pass notes and tease each other. subsequently, more students get off-task. mr. smith is deficient in
Mr. Smith frequently misses the fact that the students in the back of the room joke around and pass notes. Mr. Smith lacks attentiveness.
In most cases, the terms often and frequently can be used interchangeably, but often connotes a great deal of repetition and, occasionally, regularity of occurrence: We frequently visit there, frequently suggesting particularly repetition at relatively frequent intervals: It occurs regularly. Adverbs of frequency are frequently used with the present simple tense because they are frequently used to describe routine or repeated activities. In order to place the adverb of frequency after the subject and before the verb, place it in the middle of the sentence. When the word usually is used as a frequency adverb, it seems to me to imply a higher frequency than frequently. However, usually does not necessarily imply "often," and it can mean in a way that is normal: About four times a year, I travel to England.
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find the mass of water at 10oc that must be added to 300 kg of water at 50oc to lower its temperature to 40oc.
The mass of water is 0.01012 kg.We know that the heat lost by mercury, Q equals heat gained by water, Q'-Q = Q'
Find the mass of water ?Where Q = mc(T - T') where m = mass of mercury = 1.94 kg, c = specific heat capacity of mercury = 139.5 J/kg °C, T' = initial temperature of mercury = 200 °C and T' = final temperature of mercury = 100 °C (since this is the temperature at which the water will boil).Also, Q' = Q" + Q"' where Q" = m'c'(T - T") where m = mass of water = 0.05 kg, c = specific heat capacity of water = 4200 J/kg °C, T" = initial temperature of water = 80 °C and T' = final temperature of water = 100 °C (since this is the temperature at which the water will boil).Also, Q'" = m"L where m" = mass of evaporated water and L = latent heat of vaporization of water = 2.26 × 10⁶ J/kgMaking m" subject of the formula, we have
m" = -[mc(T - T') + m'c'(T - T")]/L
m" = -[270.63 J/ °C(-100 °C) + 210 J/ °C (20 °C)]/2.26 × 10⁶ J/kg
m" = 22863 J/2.26 × 10⁶ J/kg
m" = 0.010116372 kg
m" ≅ 0.01012 kg
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when walking with a knife, hold it by the handle with the tip pointing down and the sharp edge behind you. a. true b. false
When walking with a knife, hold it by the handle with the tip pointing down and the sharp edge behind you. a. true.
How should you handle a knife when moving?There are frequently people rushing about everywhere if you're carrying a knife in the kitchen, especially in a busy commercial kitchen. You have to get used to the idea that the only way to walk with a knife in your hand is to hold it with the blade facing your leg and pointing straight down. Maintain a stiff arm.
What is the name of the safest knife grip?The way you hold a knife is the same regardless of the type you are using. The safest, most effective, and most efficient way to use a knife is with a "pinch grip."
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the stars in elliptical galaxies generally move either 1) in irregular orbits in all directions or 2) together in a particular direction as they orbit. what is the general motion for the stars in an elliptical galaxy?
Stellar orbits in elliptical galaxies are random, as opposed to spiral galaxies, where all of the stars orbit the galaxy's core in the same way.
What direction do stars in elliptical galaxies migrate in?Stellar orbits in elliptical galaxies are random, as opposed to spiral galaxies, where all of the stars orbit the galaxy's core in the same way.The majority of elliptical galaxies' star motions are currently thought to be fundamentally random; the size of the anisotropy of the stellar motions, or how much random velocities vary in different directions, determines the form of these galaxies.Ellipsoidal galaxies are round or oval in shape, as their name suggests, and contain stars that are widely spaced out.To learn more about Elliptical galaxies refer to:
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36. which of the following is not an advantage that the hubble spacetelescope has over large telescopes on earth?a. the hubble is above the earth's atmosphere, while on the ground starimages twinkle and jiggleb. the hubble can observe at wavelengths (such as uv) which cannot be seenfrom the groundc. the hubble has a larger aperture than any visible-light telescope on earthd. the hubble has a better resolution than visible-light telescopes on earth (notcounting adaptive optics)e. you can't fool me, all of these are advantages the hubble has over earth-bound telescopes
The option that is not an advantage of the Hubble Space Telescope over the large telescopes on earth, is the Hubble has a larger aperture than any visible-light telescope on Earth. Correct answer: letter C.
Because Hubble cannot make real-time observations. Hubble is a space telescope that collects light traveling through space from distant objects. This light must be collected by the telescope and then sent back to Earth for processing, which takes time. This means that Hubble cannot make real-time observations as large telescopes on Earth do.
What is the Hubble Space Telescope?The Hubble Space Telescope (HST) is a large telescope in space that was launched in 1990. It orbits Earth at an altitude of about 340 miles and allows scientists to observe distant galaxies, stars, and other celestial objects in space. Hubble is the only telescope to have been placed outside of Earth's atmosphere, allowing it to have a much clearer view of the cosmos.
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Assuming that the satellites do not affect each other, find the orbital periods t1 and t2 of the two small satellites without using the mass of pluto.
The orbital periods of the two small satellites are [tex]T_{sat1} = 24.5 days[/tex] and [tex]T_{sat2} = 37.7 days[/tex].
What is orbital periods?An orbital period is the time it takes for a given astronomical object to orbit another object. In astronomy, it usually applies to planets or asteroids orbiting the sun, moons orbiting planets, exoplanets orbiting other stars, or binary stars. Changes in the orbital period can be explained by the evolution of the mass asymmetry to symmetry (symmetry of the binary system). Decreasing and increasing orbital periods are predicted to be related to the non-overlap and overlap of the binary in its symmetrisation respectively. Orbital decay is the gradual decrease in the distance between two orbiting bodies at their point of closest approach over several orbital periods. These orbiting bodies can be a planet and its satellite, a star and any object orbiting it, or parts of some binary system.Therefore,
distance of first satellite = 48,000 Km
distance of second satellite = 64,000 Km
orbital period = 6.39 day
Using equation of time period
[tex]T =\frac{ 2\pi r^{3^{/2} } \\}{\sqrt{GM_{pluto} } }[/tex]
now, from the above equation we can say that only variable is Time period and r is the radii of orbit.
from the first satellite
[tex]\frac{T _{charon} }{r^{\frac{3}{2}_{charon} } }[/tex][tex]= \frac{Tsat_{1} }{r^{\frac{3}{2}_{sat1} } }[/tex]
[tex]T_{sat1} = \frac{T_{charon}r^{\frac{3}{2} } }{r^{\frac{3}{2} _{charon} } }[/tex]
[tex]T_{sat1} = \frac{6.39\times48000^{\frac{3}{2} } }{19600^{\frac{3}{2} } }[/tex]
[tex]T_{sat1} = 24.5 days[/tex]
for 2nd satellite,
[tex]T_{sat2} = \frac{T_{charon}r^{\frac{3}{2} } }{r^{\frac{3}{2} _{charon} } }[/tex]
[tex]T_{sat2} = \frac{6.39\times64000^{\frac{3}{2} } }{19600^{\frac{3}{2} } }[/tex]
[tex]T_{sat2} = 37.7 days[/tex]
The complete question is In March 2006, two small satellites were discovered orbiting Pluto, one at a distance of 48,000 km and the other at 64,000 km. Pluto already was known to have a large satellite Charon, orbiting at 19,600 km with an orbital period of 6.39 days. Assuming that the satellites do not affect each other, find the orbital periods of the two small satellites without using the mass of Pluto.
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