A 14-ohm resistor is to be installed in a series circuit carrying 0.05 ampere. The resistor will be required to dissipate approximately 0.0355 watts.
The power that the resistor is required to dissipate can be calculated as the product of the current flowing through the resistor and the voltage across the resistor. In this case, the current is 0.05 A and the voltage across the resistor is equal to the current multiplied by the resistance, so we have:
V = I x R = 0.05 A x 14 Ω = 0.7 V
And the power dissipated by the resistor is given by:
P = V x I = 0.7 V x 0.05 A = 0.0355 W
So the resistor will be required to dissipate approximately 0.0355 watts.
A resistor is an electrical component that restricts the flow of electric current. It is used in circuits to control the amount of current and voltage, and to generate heat, light or sound. Resistors can be made from different materials and have a wide range of values, typically measured in ohms (Ω). They play an important role in controlling the current flow in a circuit and preventing damage to other components. In a simple circuit, resistors are often used in combination with other components such as capacitors, inductors, and diodes to create complex electrical systems.
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a child is standing on the edge of a merry-goround that is rotating with frequency f. the child then walks towards the center of the merry-go-round. for the system consisting of the child plus the merry-go-round, what remains constant as the child walks towards the center? (neglect friction in the bearing)
The total angular momentum of the child plus the merry-go-round remains constant.
Angular momentum is a measure of an object's rotational motion and is equal to its mass times its velocity around a point. In this scenario, the child is walking towards the center of the rotating merry-go-round, thus changing its velocity.
However, as there is no external force acting on the system (child and merry-go-round), the total angular momentum must remain constant as per the law of conservation of angular momentum.
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help!! Kara is watching as a tall tree in her neighborhood is being pruned back. She notices that large branches and small branches take the same amount of time to fall to the ground. Which scientist’s work is supported by this observation?
a.Newton
b.Copernicus
c.Galileo
d.Aristotle
Scientist’s work is supported by this observation. The correct answer is : d. Aristotle
Which scientist’s work is supported by this observation?
Aristotle's work in physics is supported by this observation, as he proposed that heavier objects fall faster than lighter objects. Since both the large and small branches take the same amount of time to fall to the ground, it indicates that the weight of the branches does not affect the time it takes for them to fall. This supports Aristotle's theory that the speed of falling objects is independent of their weight. Aristotle proposed that objects fall at a constant speed regardless of their weight. This is due to the fact that the force of gravity is constant and it accelerates all objects at the same rate.
This is why both the large and small branches take the same amount of time to fall to the ground.
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Answer:
Why can no one eve give a correct answer
the real answer is Galileo
Explanation:
a sprinter is trying to cover 300.0 m in exactly 30.0 s. if they accelerates from rest at 1.00 /2 for the first 10.0 seconds, what must their acceleration be for the last 20.0 seconds?
Answer:
0.250 m/s^2
Explanation:
Using Δx=+12^2
the displacement in the first 10.0 seconds is found to be 50.0 m. =0+
gives velocity at the end of 10.0 s to be 10.0 m/s. Using the first equation, it is found that in order to complete the final 250.0 meters in the last 20.0 seconds, their acceleration must be 0.250 m/s2.
The calculated value is 3 m/s. Acceleration traveled by car from the starting point equals 4m+15m, or 19m.
The rate at which velocity changes is called acceleration. Acceleration typically indicates a change in speed, but not necessarily. An item that follows a circular course while maintaining a constant speed is still moving forward because the direction of its motion is shifting.
a=1m/s^2
Vi = 0
t = 3sec
V*t meters equals 3 m/s times 5 seconds, or 15 meters, in 5 seconds of continuous speed for a car.
Distance traveled by car from the starting point equals 4m+15m, or 19m.
mileage is calculated as Vi*t + 1/2at2 = 1/2*1m/s.
^2*3^2 * s^2 = 4•5 m
V equals Vi plus at plus 1 m/s.
2 × 3sec = 3m/s
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what of the following household device would most likely consume the most power when in use? group of answer choices ceiling fan computer electric oven table lamp nightlight television flashlight radio
The household device which most likely consumes the most power when in use is the electric oven.
Which home appliances use the most electricity?There is a trend of growth in electricity consumption all over the world.
Here is the list of electricity usage on home appliances in order to minimize energy consumption.
Heating and cooling (45-50%). The largest electricity is heating and cooling appliances. For example, air conditioners and heaters use a lot of energy to control room temperature. Water heater (12%). It is used for showering and laundry. This is the second biggest energy consumer. Lighting (9-12%). LEDs require less energy than incandescent bulbs. Refrigerator (8%). Even though it's not consumed that much energy, the refrigerator is always on.Washer and dryer (5%). As doing laundry (washing and drying), it consumes a lot of electricity usage. Dishwasher (2%). Dishwashers use a relatively low amount of electricity.TV and cable box (2%). The standby tv can consume more electrical power.Thus, since no option for space heating and cooling appliances, the appliance for heating is also an electric oven.
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if a cordless phone operates at a frequency of 9.00× 1 0 8 s –1. what is the wavelength of this radiation? h= 6.6x10–34 m 2 kg/s c= 3 x1 0 8m/s
If a cordless phone operates at a frequency of 9.00× 1 0 8s –1. 0.33 meters is the wavelength of this radiation.
The wavelength of a wave can be calculated using the formula:
λ = c / f
Where λ is the wavelength, c is the speed of light, and f is the frequency of the wave.
Given the frequency of the cordless phone as 9.00 x 108 s-1, the speed of light as 3 x 108 m/s, and using the formula above, the wavelength can be calculated as:
λ = c / f = 3 x 108 m/s / 9 x 108 s-1 = (3 / 9) x 10^8 m
λ = 0.33 x 10^8 m = 0.33 m
So, the wavelength of the radiation from the cordless phone is approximately 0.33 meters.
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Which piece of evidence from the paage bet upport the idea that foret promote rainfall
"Planting more trees brings rain because plants transpire" is the piece of evidence from the page that support the idea that forest promote rainfall.
What is transpiration?Water is moved through a plant during transpiration, and it is evaporated from aerial parts of the plant, such as leaves, stems, and flowers. Even though plants need water to survive, only a small portion of the water absorbed by their roots is actually utilised for cellular growth and metabolism.
Transpiration and guttation cause the remaining 97-99.5% to be lost. In most plants, the undersides of the foliage have more of the tiny pores known as stomata that decorate the surface of leaves.
The guard cells that surround the stomata are responsible for opening and closing the pore, as are their stomatal accessory cells. Transpiration occurs through the stomatal apertures and is regarded as a "cost" of the stomata opening, which allows the diffusion of carbon dioxide gas from the atmosphere for photosynthesis.
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correct answer is ??
Answer:
below
Explanation:
Remember V = IR
Then V/R = I
10 v / 25 ohm = .4 A
when a surface is submerged in a fluid, the resultant pressure force on the body acts in what manner?
Explanation:
When a surface is submerged in a fluid, the resultant pressure force on the body acts perpendicular to the surface in all directions. This is known as hydrostatic pressure. The pressure at a particular point in a fluid is the same in all directions and is directly proportional to the fluid's density and the depth of the point below the surface of the fluid. As the depth increases, the pressure also increases. The pressure at any point in a fluid is exerted in all directions, so it is a scalar quantity.
This pressure is defined as the force exerted per unit area, and it is determined by the weight of the fluid above the point of interest. The pressure at a point in the fluid is the same in all directions, so it is called an isotropic property of fluid
11. Describe the anthropic principle. What are some properties of the universe that make
it "ready" to have life forms like you in it?
The "anthropic principle" is the idea that the physical laws that we observe must be
what they are precisely because these are the only physical laws that allow for the
existence of humans. Properties of the universe that make it "ready" to have life
forms like us include: (a) a 1-part-in-105
mass-energy fluctuation in the early universe
that allowed formation of galaxies like ours (which include regions for solar systems
with sufficiently low intensity of X-rays and gamma rays), (b) a balance between the
forces of expansion and contraction for the universe (so it didn’t expand or collapse
too fast), resulting from a mass-energy density very close (or equal) to critical
density, (c) a very slight initial excess of matter that survived matter-antimatter
annihilation, (d) nuclear fusion reactions at rates that produce long-lasting stars, (e)
the strength of gravity not being much stronger (so that stars form with smaller
masses and live too short a time), and (f) the structure of atomic nuclei providing
sufficient production of carbon nuclei in stars via fusion of three helium nuclei.
The Anthropic Principle states that the physical laws of the universe must be what they are because they are the only laws that allow for the existence of human beings. The universe has several properties that make it "ready" for the existence of life forms like us.
One of these properties is a 1-part-in-105 mass-energy fluctuation in the early universe that allowed for the formation of galaxies like ours. This includes regions for solar systems with low intensity of X-rays and gamma rays, which are necessary for the existence of life.
Another important property is the balance between the forces of expansion and contraction for the universe. This balance results from a mass-energy density very close (or equal) to critical density, ensuring that the universe did not expand or collapse too fast.
There was also a slight initial excess of matter that survived the matter-antimatter annihilation, which contributed to the formation of life-supporting stars. Additionally, the strength of gravity is not too strong, allowing for the formation of stars with smaller masses that have longer lifetimes. Finally, the structure of atomic nuclei provides sufficient production of carbon nuclei in stars via fusion of three helium nuclei, which is essential for the formation of life.
In conclusion, the Anthropic Principle explains that the physical laws of the universe and its properties are precisely what they are because they are the only conditions that allow for the existence of human beings.
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A toy airplane is flying at an average velocity of 3. 4 m/s by a 660 W engine which applies its force in the direction of the flight. What is the magnitude of the force delivered by the airplane's engine
Only normal acceleration occurs in a uniform circular motion, and it moves in the direction of the center. Tangential acceleration is equal to zero.
What does circular motion's uniform look like?A particular kind of motion in which an object moves in a circle at a fixed speed is known as uniform circular motion. Any point on a propeller, for instance, that is rotating at a consistent speed is doing uniform circular motion.
What are the features of a circular motion that is constant?Two properties let us recognize a particle moving uniformly in circles: It travels in a circle with a radius of r and moves at a constant speed v. The particle's acceleration is then radially pointed toward the center of the circular path and has a magnitude of v2/r.
The weight of the toy is: m = 1 k g
The circle's diameter is r = 1.5 meters.
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two skaters, each of mass 50 kg, slide on ice toward each other along parallel paths separated by 3.0 meters
A collision will occur when two skaters, each weighing 50 kg, are moving parallel to one another on ice and are 3.0 metres apart.
The speed at which the skaters were moving before colliding and the type of collision determine how it will turn out (e.g. elastic or inelastic) The whole kinetic energy of the two skaters is conserved in an elastic collision, which means that the total energy before and after the impact are equal.
In this scenario, the speed of the skaters after the collision will differ from their speed prior to the impact, but their overall kinetic energy won't change. Some of the system's kinetic energy is changed into other energy during an inelastic collision.
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Correct Question:
What happened when two skaters, each of mass 50 kg, slide on ice toward each other along parallel paths separated by 3.0 meters.
can someone please help me with this
The first equation of motion is velocity is equal to 'u + at '(initial velocity+ acceleration x time taken).
What is the derivation of equations of motion?
The three equations of motion are derived mathematically, using the equation of motion's derivation. In a particular problem of motion relating to daily life, several parameters such as time, velocity, acceleration, or distance are calculated using algebraic, graphic, and calculus approaches. U, V, A, and S are vector quantities among these parameters.Positive vectors point in the same direction, while negative vectors point in the opposite direction. Equations of motion are applicable to motion that accelerates uniformly.Moving objects have momentum, which is subject to forces. In an explosion or collision, the overall momentum is preserved and remains constant.To learn more about velocity refer to:
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which equation is correct? a. tc or - wca = th. b. th or - dev = mh. c. mh or - var = ch.
The equation TC + or - WCA = TH is correct among the given equations. The option A is correct.
These given equations are regarding the magnetic compass errors.
Now, let us see the full form of the given above equation.
First Letter
T = concerning TRUE North (use plotter and latitude)
M = Regarding MAGNETIC North (True North +/- Deviation)
C = refers to the COMPASS North (Magnetic North +/- Compass card deviation) system
Second Letter
C = Plotted COURSE on the map (no wind correction applied)
H = Aircraft's HEADING after applying wind correction (Course +/- Wind Correction Angle)
Normal Order
TC = True course
VAR = Variation
MC = Magnetic course
WCA = Wind correction angle
MH = Magnetic heading
DEV = Deviation
CH = Compass heading
So, the above correct equation means that, True Course + or - Wind correction angle = True heading
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what is the electric potential due to a point charge of 7.00 μc at a distance of =0.500 cm, assuming that potential is equal to zero as →[infinity]?
the electrical potential due to a point charge of 7.00 μc at a distance of 0.500 cm is 126 volts.
Electric potential, the amount of work needed to move a unit charge from a reference point to a specific point against an electric field.
Given that,
point charge = 7.00 μc at a distance of 0.500 cm
assuming that potential is equal to zero as →[infinity]
Potential at a distance 9 cm, v = kq/r
k = 9 x 10^9
v = 9 x 10^9 x 7 x 10^-6 / 0.5 x 10^-2
= 126 v
therefore the electrical potential due to a point charge of 7.00 μc at a distance of =0.500 cm is 126 volts.
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For the elementary solid-catalyzed liquid-phase reaction Make a plot of equilibrium conversion as a function of temperature. Determine the adiabatic equilibrium temperature and conversion when pure A is fed to the reactor at a temperature of 300 K. for A - AHF,298 = -40,000 cal/mol for B => AHF 298 = -60,000 cal/mol CPA = 50 cal/mol.K CPB = 50 cal/mol. K K298= 100,000
Since ΔCp = 0 for this reaction, X will remain constant at a value of 100,000 at all temperatures. Therefore, the adiabatic equilibrium conversion is also 100,000 at 500 K.
The temperature dependence of the equilibrium conversion in an elementary solid-catalyzed liquid-phase reaction can be determined using the van't Hoff equation. The adiabatic equilibrium temperature can be estimated using the adiabatic temperature rise equation.
Adiabatic temperature rise equation: ΔT = ΔH/Cp
At a temperature of 300 K and with pure A fed to the reactor, the adiabatic temperature rise can be calculated as follows:
ΔH = -40,000 cal/mol - (-60,000 cal/mol) = 20,000 cal/mol
Cp = CPA + CPB = 50 cal/mol.K + 50 cal/mol.K = 100 cal/mol.K
ΔT = ΔH/Cp = 20,000 cal/mol / 100 cal/mol.K = 200 K
Adiabatic equilibrium temperature = 300 K + ΔT = 500 K
Equilibrium conversion can be calculated using the van't Hoff equation:
X = K298(T/298)^(ΔCp/R)
Where ΔCp is the heat capacity difference between products and reactants, R is the universal gas constant, and T is the temperature.
Since ΔCp = 0 for this reaction, X will remain constant at a value of 100,000 at all temperatures. Therefore, the adiabatic equilibrium conversion is also 100,000 at 500 K.
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a position vector in the first quadrant has an x-component of 4.6 m and a magnitude of 13.7 m. what is the value of its y-component?
The y-component of the vector with an x- component of 4.6m and magnitude of 13.7 m would be 12.9 m
The length of a vector, denoted by the notation |v|, can be determined by using the magnitude of a vector formula, which is used to compute the magnitude of the vector itself. This value effectively measures the length that must be traveled from the vector's starting point to its ending position. The formula to determine the magnitude of a vector (in two dimensional spaces):
v = (x, y) is: |v| =√(x2 + y2)
In this case, we have:
Magnitude (v) = 13.7
x-component (x) = 4.6
Thus, the y-component of the vector would be:
|v| =√(x2 + y2).
13.7 = √(4.62 + y2)
y2 = 166.53
y = 12.9
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does a planet moving with constant speed in a circular orbit around the sun represent an illustration of the principle of inertia?
Yes, a planet moving in a circular orbit around the Sun with constant speed represents an illustration of the principle of inertia.
According to the principle of inertia, an object in motion will continue to move in a straight line at a constant speed unless acted upon by an external force. In the case of a planet in orbit around the Sun, the planet's inertia causes it to move in a straight line, but the gravitational force from the Sun acts as an external force, continuously pulling the planet back toward the Sun and causing it to follow a circular path. In this way, the planet's constant speed in a circular orbit around the Sun is a demonstration of the principle of inertia.
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what are density in physics
Answer:
Density Definition: Density is the measurement of how tightly a material is packed together. It is defined as the mass per unit volume. Density Symbol: D or ρ Density Formula: ρ = m/V, where ρ is the density, m is the mass of the object and V is the volume of the object.
The Impact is the first commercial electric car to be developed in over 60 years. During tests in 1994, the car reached a top speed of over 80 m/s. Suppose the car started at rest and then underwent a constant acceleration of 1.5 m/s2 until it reached its top speed. How long did it take the Impact to reach its top speed?
The time required for the impact to reach its top speed of over 80 m/s is 53.33 seconds.
What is Acceleration?Acceleration can be defined as the rate of change of velocity of an object. Acceleration is a vector quantity as it has both the magnitude and direction. The SI unit of acceleration is meter per second square.
Acceleration = rate of change of velocity
a = (v-u)/t
where, a = acceleration of the object,
v = final velocity of the object,
u = initial velocity of the object,
t = time taken
a = 1.5m/s²
v = 80m/s
u = 0m/s
t = ?
t = (v-u)/a
t = (80-0)/ 1.5
t = 80/ 1.5
t = 53.33 seconds
Therefore, the time required to reach the top speed is 53.33 seconds.
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A train started from rest and moved with constant acceleration. At one time it was traveling 35 m/s, and 160 m farther on it was traveling 48 m/s.(a) Calculate the acceleration.m/s2(b) Calculate the time required to travel the 160 m mentioned.s(c) Calculate the time required to attain the speed of 35 m/s.s(d) Calculate the distance moved from rest to the time the train had a speed of 35 m/s.m
The Acceleration is a=3.37 m/[tex]s^2[/tex], the time required to travel the 160 m is t=3.86s, the distance moved from rest to the time the train had a speed of 35 m/s.m is d=182m
The measurement of distance is the separation between two objects or points, and it can be quantitative or occasionally qualitative. In physics, the term "distance" can refer to a physical length or, in common parlance, to an estimate based on other considerations (e.g. "two counties over").
[tex]V_{f} =[/tex]48m/s
d=160m
apply the equation
[tex]V_{f} ^2=V_{f} ^2+2as\\[/tex]
[tex]48^2=35^2+2a\times160[/tex]
2304=1225+320a
1079=320a
a=3.37 m/[tex]s^2[/tex]
b) [tex]V_{i} =[/tex]35m/s
[tex]V_{f} =[/tex]48m/s
a=3.37 m/[tex]s^2[/tex]
Apply the equation [tex]V_{f} =V_{i} +at[/tex]
48=35+3.37 x t
t=3.86s
c) - [tex]V_{i} =[/tex]0m/s
[tex]V_{f} =[/tex]35m/s
a=3.37 m/[tex]s^2[/tex]
Apply the equation [tex]V_{f} =V_{i} +at[/tex]
35=0+3.37 x t
t=10.4s
d)- [tex]V_{i} =[/tex]0m/s
[tex]V_{f} =[/tex]35m/s
a=3.37 m/[tex]s^2[/tex]
Apply the equation [tex]V_{f} ^2=V_{f} ^2+2as\\[/tex]
[tex]35^2=0+2\times3.37\times d\\[/tex]
1225=63.74d
d=182m
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when a swimmer stands on a high diving board, he has 5800 j of pe relative to the surface of the water.
(a) When the swimmer steps off the diving board, his initial PE is 5800 J and his initial KE is zero.
(b) At the instant he is half way to the water just before he hits the water, half of his initial PE has been converted into KE, so his PE and KE are both equal to half of his initial PE: PE = KE = 0.5 * 5800 J = 2900 J.
(c) PE and KE just before he hits the water are 0 and 5800J.
(d) Height of the diving board above the water is 4.7 meters.
(e) Velocity of the swimmer just before he hits the water is 10.5 m/s.
The conservation of energy principle states that the initial potential energy (PE) plus the initial kinetic energy (KE) is equal to the final PE plus the final KE. When the swimmer steps off the diving board, his initial PE is 5800 J and his initial KE is zero.
As he falls towards the water, some of his potential energy is converted into kinetic energy (KE = 1/2 mv^2). At the instant he is half way to the water just before he hits the water, half of his initial PE has been converted into KE, so his PE and KE are both equal to half of his initial PE:
PE = KE = 0.5 * 5800 J = 2900 J
Since the mass of the swimmer is 62 kg, the velocity v can be calculated from the equation:
PE = mgh
h = PE / (m * g) = 2900 J / (62 kg * 9.8 m/s^2) = 4.7 m
So the height of the diving board above the water is 4.7 meters.
Finally, the velocity of the swimmer just before he hits the water can be calculated from the equation:
KE = 1/2 mv^2
v = √(2KE/m) = √(2 * 2900 J / 62 kg) = 10.5 m/s
So the velocity of the swimmer just before he hits the water is 10.5 m/s.
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The complete question is:
When a swimmer stands on a high diving board, he has 5800 J of PE relative to the surface of the water. (a) What is his PE and KE the instant he steps off the board (b) when he is half way to the water (c) just before he hits the water. If the swimmer's mass is 62 kg (d) what is the height of the board above the water (e)the swimmer's velocity just before he hits the water?
with initial condition . a. use euler's method with two steps to estimate when : 3.25 (be sure not to round your calculations at each step!) now use four steps: 3.25 (be sure not to round your calculations at each step!) b. what is the solution to this differential equation (with the given initial condition)? 5(x^2/2) 2 c. what is the magnitude of the error in the two euler approximations you found? magnitude of error in euler with 2 steps
To solve the given differential equation with the given initial condition, you can use the Euler's method with two steps and four steps.
The solution for two steps is y(1) = 5.25 and for four steps it is y(1) = 5.3125. The magnitude of the error in the two Euler approximations can be calculated using the formula:
Error = |Exact Solution - Approximate Solution|.
The exact solution for the given differential equation and initial condition is y(1) = 5.3125. Therefore, the magnitude of the error in the two Euler approximations is 0.0625.
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A 227 kg car is initially traveling at 65 m/s slams on its brakes during a huge rain storm. The coefficient of
friction between the tires and the road is 15. Find the distance the car would travel before coming to a rest? How
would the distance be affected on a dry day?
The distance the car would travel before coming to a rest is 14.37m.
Four main categories of frictional forces are listed below: -Dry Friction: Dry friction describes how static friction and kinetic friction interact. In other words, it opposes the sliding motion of a moving solid over a stationary solid. As the name implies, fluid friction is the friction of a viscous fluid. The force that opposes the motion of a rolling solid, such as a ball rolling or a set of wheels, is known as rolling friction. Sliding Friction: This type of friction, also known as kinetic friction, is produced when two rolling bodies move in tandem.
Given, μ = 25
g = 9.8m/s²
u = 65 m/s
v = 0m/s
The frictional force,
fμ = -μmg = ma
a = -μg = - 15 × 9.8 = - 147 m/s²
From the 3rd equation of motion,
2as = v² - u²
-2 × 147 × s = 0² - 65 × 65
s = 14.37m
On a dry day, the distance would reduce as friction is more on dry day.
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the remanent magnetization of a material is its level of permanent, internal magnetization in no applied magnetic field. true or false: the remanent magnetization of a material is its level of permanent, internal magnetization in no applied magnetic field. true false
It is true that the remanent magnetization of a material is its level of permanent, internal magnetization in no applied magnetic field.
The magnetization left behind in a ferromagnetic substance (such as iron) when an external magnetic field is removed is referred to as remanence, remanent magnetization, or residual magnetism. When a magnet is "magnetised," it exhibits remanence.
Magnetization, also known as magnetic polarisation, is a vector quantity that represents the density of a magnetic material's permanent or induced dipole moment.
When there is an applied magnetic field the the material gets magnetized but when the material is not under any magnetic field, then the remanent magnetization is known as the permanent real magnetization of the material.
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a charge of 5.9 c is to be split into two parts that are then separated by 3.3 mm. what is the maximum possible magnitude of the electrostatic force between those two parts? n
The maximum possible magnitude of the electrostatic force between those two parts is calculated to be 7.19 × 10¹⁵ N.
The electrostatic force expression is as follows:
F = k Q q/r²
where,
Q, q are charges
k is Coulomb's constant
r is the separation between charges
In this problem, Q = q = 5.9/2 = 2.95 C
Separation is given as 3.3 mm = 3.3 × 10⁻³ m
The value of k is 9 × 10⁹ N m²/C².
After plugging the values into the equation above, we have,
F = k Q q/r² = (9 × 10⁹ ×2.95 × 2.95)/(3.3 × 10⁻³)² = (78.33× 10⁹)/(10.89 × 10⁻⁶) = 7.19 × 10¹⁵ N
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For an object floating in water at rest, which of the following forces are NOT acting on the object? a. All of these forces are acting on the object b. Pressure Force c. Buoyancy Force d. Normal Force e. Weight Force
The block is submerged in water in this instance, so normal force won't apply. The remaining forces will continue to impact the block.
Contact with a solid surface will always result in a normal or reaction force. The block is submerged in water in this instance, so normal force won't apply. The remaining forces will continue to affect the block: - Pressure force coming from the block's four sides ( which will sum up to 0) buoyancy force moving upward weight force acting downward.
When an object enters water, two forces are at work on it: buoyancy, an upward force, and gravity, a downward force. The force of gravity pulling an object downward is measured by the object's weight. The buoyant force is present regardless of whether the object is floating or submerged in the fluid, and its strength is determined by the amount of fluid that the object displaces.
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the windings of the relay coil in a current relay has very low resistance. why?
The winding of the relay coil has very low resistance, due to the high requirement of electric current.
Relay coil is an automatic switch that open & close the circuit & it is based on the magnetic effect of electric current. The relay coil works as an electromagnet. When the current is supplied through it, it attracts the connecter and circuit becomes closed in other way. The attraction force is a magnetic force which is formulated as F = BILSinθ.
So Magnet force is directly proportional to the electric current(I). By Ohm's law I = V/R, we can see that less the resistance more will be the current for a constant voltage. And more the current more will be the magnetic force for efficient work of the electromagnet.
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CAN yall help me with this please! god bless yall! thanks <3
Depending on the substance, current and voltage have different relationships. You see, an object conducts current when a specific voltage is applied between two locations on it.
What is the connection between voltage (V) and current (I)?
The Ohm's law describes the relationship between current (I) and voltage (V). It claims that the voltage and current are directly proportional. According to Ohm's law, the relationship between current (I), voltage (V), and resistance (R) looks like this.Current also rises with increasing voltage. This raises the temperature, which in turn increases the resistance.A current-voltage characteristic of the device is the relationship between the direct current (DC) flowing through an electronic device and the DC voltage across its terminals. These diagrams are used by electronic engineers to represent a device's behavior in an electrical circuit and establish the fundamental parameters of a device.To learn more about voltage refer to:
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astronomers discover a planet orbiting around a star similar to our sun that is 20 lightyears away. how fast must a rocketshup go if the round trip is to take no longer than 40 years in time for the astronauts aboard?
The velocity of the rocketship to go if the round trip is to take 40 years in time for astronauts aboard is 0.707c m/s.
The speed of any particle is given by the distance it travels in a unit of time. So, distance, d= s×t. This speed tells us about the travel speed of the light in an entire year. The light year defines the distance of a beam of light in space.
The distance of one side,x= 20 light years. The time is taken, T= 40yrs. So, the speed of the rocket is given by the equation, 1-V²/c² =V²×T²/x², 1/V²=(T²/x²) + (1/c²), V =[1/(T²/x²)+(1/c²)]^½, where c is the speed of light and its value is equal to 3×10^9 m/s and V is velocity. So for a round trip, the distance becomes, x=x', x' =2×20 =40 light years. Now Substituting all these values in the equation for V, we get, V=[1/(40yr/40ly)+(1/c²)]^½, V=(1/2/c²)^½, V=0.707×c. So the velocity of the rocketship will be 0.707c m/s.
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a photoelectric experiment was performed by separately shining a laser at 450 nm (blue light) and a laser at 560 nm (yellow light) on a clean metal surface and measuring the number and kinetic energy of the ejected electrons. which light would generate more electrons? which light would eject electrons with greater kinetic energy? assume that the same amount of energy is delivered to the metal surface by each laser and that the frequencies of the laser lights exceed the threshold frequency.
Because of shorter wavelength, Blue light would release electrons with more kinetic energy. Yellow light would generate more electrons.
Blue and yellow light must have different intensities for the yellow light to emit electrons with more kinetic energy.
The yellow light must be more intense than the blue light since both lasers send the same amount of energy to the metal surface. The yellow light must therefore produce more electrons.
The expelled electrons must have a higher kinetic energy since the wavelength of blue light is shorter.
It is demonstrated by the photoelectric effect that light can behave like a particle. When photons are shone on a metal surface, electrons are expelled from the surface of the metal, which causes the photoelectric effect.
When compared to green light, the higher energy blue light ejects electrons with more kinetic energy.
No electrons are released by light below a specific frequency. In contrast, light exceeding that threshold frequency can emit electrons even at modest intensities. Electron ejection speed appears to be frequency dependent, with an increase in frequency resulting in an increase in speed.
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