After leaving the provided switch at the given position for a longer time, then its moves given switch from a to b. At t = 0, the left part of the plate C has charge q=max and therefore, the current flowing through it is zero.
What are Oscillation ?
Oscillation is the repetitive or periodic variation, usually in time, of a few degree approximately a crucial value (regularly a factor of equilibrium) or among or extra one-of-a-kind states. Familiar examples for all oscillation encompass a swinging type of pendulum with alternating current. A wave is stated to oscillate, which means to transport to and fro in a regular, repeating way.
This fluctuation may be among extremes for all position, like force, or quantity. Different sorts of waves have one-of-a-kind sorts of oscillations. Longitudinal type of waves: here Oscillation is parallel route of the wave.
The maximum charge stored in the capacitor is,
Q== CE
i=0
At t=t/4 the left part of the plate C has charge q = 0 and therefore, the current flowing through it is clockwise.
i= clockwise
At t=t/2, the left part of the plate C has charge q=-9max and therefore, the current flowing through it is zero.
i=0
At t=3t/4, the left part of the plate C has charge q=0 and therefore, the current flowing through it is counter clockwise.
i=counter clockwise.
At t = 0, the left part of the plate C has charge q=max and therefore, the current flowing through it is zero.
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what is the far point in m of a person whose eyes have a relaxed power of 53.3 d? (assume a lens-to-retina distance of 2.00 cm.)
According to the question the far point in m of a person's eye is 0.30m.
what is the far point?In terms of the space the eye can accommodate, this refers to the farthest distance from which an item can be positioned for its picture to be mirrored on the retina. It can also be thought of as the distance from the eyes at which pictures are clearly visible. The units are meters, or m.
Briefing:P = relaxed power of the eye
F =far point
Given in the question:
The power of the eye is given as
P = 1/di + 1/do
P is power of the eye
di is the distance between eye lens and the image
d₀ is distance between eye lens and image
Given that,
P =53.3d
Take note that the power unit "d" stands for "dioptre," which means "per meter."
If the person can see clearly, the separation between the eye lenses and the picture (di), which is 2 cm, must be identical to that distance.
Thus, di = 2cm = 0.02m
P = 1/di + 1/d₀
1/d₀ = P — 1/di
1/d₀ = 53.3 — 1/0.02
1/d₀ = 53.3—50
1/d₀ = 3.3m
taking reciprocal
d₀ = 1/3.3
d₀ =0.3030m
Then, d₀ = 0.3030m
d₀≈ o.30m
The far point the person can see is 0.30m
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starting from rest, a 94-kg firefighter slides down a fire pole. the average frictional force exerted on him by the pole has a magnitude of 800 n, and his speed at the bottom of the pole is 3.9 m/s. how far did he slide down the pole?
The firefighter will slide down upto a distance of 11.68 m.
A firefighter is a first responder with extensive training in firefighting, primarily to extinguish dangerous fires that threaten life, property and the environment, as well as to rescue people and, in some cases or jurisdictions, animals from dangerous situations.
Mass of the firefighter = m = 94kg
Frictional force = F = 800N
Speed at the bottom of the pole = 3.9m/s
Using the work energy theorem which says that initial potential energy is equal to the sum of final kinetic energy and work done.
mgh = (1/2)mv² + W
mgh = (1/2)mv² + Fh
h = height at which firefighter will slide down
h (mg - F) = (1/2)mv²
h = (1/2)mv² / (mg - F)
h = mv² / 2 (mg-F)
h = 94* (3.9)² / 2 (922.14 - 800)
h = 1429.74/122.14
h = 11.68 m
He will slide 11.68 m down the pole.
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you add equal amounts of heat to two identical cylinders containing equal amounts of the same ideal gas. cylinder a is allowed to expand, while cylinder b is not. Part A How do the temperature changes of the two cylinders compare?
Temperature rise will be there in cylinder B more than in cylinder A because of internal energy.
what is internal energy?
The sum of the kinetic and chemical potential energies of all the particles in the system is the internal energy. Particles accelerate and pick up kinetic energy when energy is applied to increase the temperature.
Briefing:
Cylinder A uses the heat it absorbs to both work while expanding and to increase internal energy (or temperature).
While cylinder B solely uses the heat it absorbs to increase its internal energy
As a result, cylinder B's temperature rise is greater than cylinder A's.
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Which statement is true of a
simple machine?
A. Simple machines are used to create friction.
B. Simple machines have many moving parts.
C. Simple machines are very basic and make
work easier.
D. Simple machines are always electrical.
A machine is a physical system that use power to exert forces, regulate movement, and carry out an activity. Simple machines are very basic and make work easier.
What is machine ?
A machine is a physical system that use power to exert forces, regulate movement, and carry out an activity. The phrase is frequently used to describe both natural biological macromolecules, such as molecular machines, and man-made devices, such as those using engines or motors.
Any tool that simplifies work by adjusting a force is a machine. Every time a force pushes an item over a distance, work is done. Work = Force x Distance is an equation that measures the amount of work that is completed. You exert force on a machine when you operate it.
Simple machines are often used to lift big items with a pulley, to ride a bicycle, or to cut with a pair of scissors. It should be noted that a machine cannot be both a force multiplier and a speed multiplier.
Thus, option C is correct.
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a block of mass 2 kg travels along a horizontal frictionless surface with velocity 3 m/s. the mass collides with another mass, m, and rebounds with velocity -1 m/s. what impulse was delivered to mass m?
A block of mass 2 kg travels along a horizontal friction less surface with velocity 3 m/s. the mass collides with another mass, m, and rebounds with velocity -1 m/s. Thus, impulse was delivered to mass m = 8 kg.m/sec.
What is impulse?Since fast-acting force or "impact" is what is meant when the word "impulse" is used, it is possible to define impulse as "the abrupt force operating on an item for a brief period of time."
In physics, the term "impulse" is used to characterize or measure the impact of force operating gradually to alter an object's motion.
Given that,
mass of block = 2 kg
horizontal friction less surface with velocity = 3 m/s.
the mass collides with another mass m and rebounds with velocity -1 m/s.
So, impulse = mass × (change in velocity)
or, impulse = 2 kg × [3-(-1) m/sec]
or, impulse = 8 kg .m/sec
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If the Sun were twice as massive O its pull on the Earth would double the pull of the Earth on the Sun would double 0 ils pull = on the Earth would double; and the pull of the Carlh 0n lhe Sun would double: none of the other choices arc correct
If the Sun were twice as massive then c)its pull on the Earth would double, and the pull of the Earth on the Sun would double. So, correct option is c.
Newton's law of gravitation looks like Coulomb's law of electrical powers, which is utilized to work out the extent of the electrical power emerging between two charged bodies. Both are reverse square regulations, where power is conversely relative to the square of the distance between the bodies. Coulomb's regulation has the result of two charges instead of the result of the majority, and the Coulomb consistent instead of the gravitational steady.
Newton's regulation has later been supplanted by Albert Einstein's hypothesis of general relativity, yet the comprehensiveness of gravitational consistent is flawless the law actually keeps on being utilized as a fantastic guess of the impacts of gravity in many applications.
Hence, correct option is c.
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(Complete question) is:
If the Sun were twice as massive
a)its pull on the Earth would double.
b)the pull of the Earth on the Sun would double.
c)its pull on the Earth would double, and the pull of the Earth on the Sun would double.
d) none of the other choices are correct.
on planet x, an object weighs 19.8 n. on planet b where the magnitude of the free-fall acceleration is 2.46 g (where g = 9.8 m/s2 is the gravitational acceleration on earth), the object weighs 39.6 n. a) what is the mass of the object on planet x? answer in units of kg
Weight of the object on planet X is 19.8 N, then the mass of the object on planet x is calculated to be 2.02 kg.
What is gravitational acceleration?In physics, gravitational acceleration is the acceleration of an object in ab free fall within a vacuum, without experiencing drag.
When objects fall on the ground, gravity causes them to accelerate. Acceleration is the change in velocity, and velocity is a measure of the speed and direction of motion. Gravity causes an object to fall to the ground much fast and faster is velocity, longer the object takes to fall.
On planet X;
Given, W= 19.8 N ; a= 9.8 m/s^2
W = m a
m= W/a= 19.8/9.8
Mass of the object on planet x = 2.02 kg
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In this schematic, the total resistance is 50 ohms. 100 ohms. 1,000 ohms. 100 ohms 10,000 ohms
The total resistance of the given circuit is if the circuit contains 100ohms,1000 ohms,100 ohms and 10,000 ohms resistors.
Resistance is measured in ohms, and it is represented by the Greek letter omega (Ω). Ohms are named after Georg Simon Ohm (1784-1854), a German physicist who concentrated on the connection between voltage, current and resistance. He is credited for planning Ohm's Regulation.
Resistance estimations are regularly taken to demonstrate the state of a part or a circuit.
The higher the resistance, the lower the ongoing current. On the off chance that strangely high, one potential reason (among many) could be harmed guides because of consuming or erosion. The lower the obstruction, the higher the ongoing stream. Potential causes: protectors harmed by dampness or overheating.Since resistors are connected in series, so we know that when resistors are connected in series, total resistance is given by the formula
Rₙ=R₁+R₂+R₃+---------------Rₙ
So, resistors value are 50 ohms. 100 ohms. 1,000 ohms. 100 ohms 10,000 ohms.
Therefore, total resistance is 50+100+1000+100+10000=10250ohm
Hence, total resistance is 10250ohm
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A boy having a mass of 75 kg holds in his hands a bag of flour weighing 40N. With what force does the floor push
up on his feet?
The force experienced by the boy on his feet is 775.75N.
Calculation of total ForceGiven Data
Mass of the boy= 75kgWeight of the bag = 40NLet us begin by calculating the total weight in the system
Weight of the boy= mg
W = 75*9.81
W = 735.75 N
Total weight of the system = 735.75+ 40
Total weight of the system = 775.75 N
A force is an influence that can cause an object's motion to change. A force can cause a mass object's velocity to change.
Force is an external agent that can change the state of rest or motion of a body.
We know that action and reaction are equal and opposite, hence the force experienced by the boy on his feet is 775.75N
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two skaters, one with mass 75 kg and the other with mass 50 kg, stand on an ice rink holding a pole of length 15 m and negligible mass. starting from the ends of the pole, the skaters pull themselves along the pole until they meet. how far does the 50 kg skater move?
50 kg skater will move 42 m to the ends of the pole starting from ice rink holding pole of length 15 m.
The mass taking into consideration all possible limitations for take-off including restrictions caused by Regulated Take-Off Mass and Regulated Landing Mass.
The load (or Mass) distributed over a defined area. Units of measurement used: SI: N/m2, kg/m2, Non-SI: psi, lb/ft2
The mass of an aircraft plus standard items such as unusable fuel, full operating fluids, fire extinguishers; emergency oxygen equipment.
Given,
Mass of skater one = 75Kg
Mass of skater two = 50Kg
Distance = 15m.
Assuming the system centre if mass does not change, both skaters would meet at the centre of the mass
let the 50kg skater be xm away from the centre, then, the 75kg skater would be (14 - x)m away from the centre too
m1x + m2(14 - x) = 0
m1x + 14m2 - m2x = 0
50x + 14*75 - 75x = 0
50x - 75x + 1050 = 0
-25x + 1050 = 0
25x = 1050
x = 42 m
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what is the sl unit for work
The SI unit for work is joule (J).
What is joule ?Joule is the SI unit of work (J). The work accomplished by a force of one newton creating a displacement of one meter is known as a joule. Work is sometimes measured in newton-metres (N-m). But because this unit is also used for torque, things can become a little complicated. As a result, the SI authority does not promote the usage of this unit.Work is the process of transferring energy to an object's motion by the application of a force; it is frequently depicted as the result of force and displacement. If a force has a component in the direction of the displacement of the site of application, it is said to have positive work.
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13. What authority enforces the requirements set by the NEC? 14. Does the NEC provide minimum or maximum standards? 15. What do the letters "UL" signify? 16. What section of the NEC states that all listed or labeled equipment shall be installed or used in accordance with any instructions included in the listing or labeling? 17. When the word "shall" appears in a NEC reference, it means that it (must)(may) be done. (Underline the correct word.) 18. What is the purpose of the NEC?
Electrical inspector authority enforces the requirements set by the NEC.
The NEC specifies the minimum requirements for secure electrical installations.
The letters "UL" signify an electrical product satisfies the safety requirements of Underwriters Laboratories
Section 110.3 (B) Installation and Use of OSHA and NEC 1999. Equipment that is listed or labelled must be installed and used in accordance with any guidelines mentioned in the listing or labelling.
the word "shall" appears in a NEC reference, it means that it (must)(may) be done.
"The goal of this Code is the practical safeguarding of persons and property from hazards deriving from the usage of electricity," the NEC reads in 90.1(A). *
A collection of guidelines for the secure installation of electrical wiring in the US called the National Electrical Code (NEC) is revised on a regular basis. The NEC has been modified three times since it was first published in 1897.
In order to avoid fires and other electrical catastrophes, the NEC offers recommendations for electrical installation. For installations to be secure, legitimate, and compliant, electricians and contractors must be knowledgeable of the NEC when applicable. The National Fire Protection Organization, a private commercial association, is responsible for maintaining the codes.
The National Electrical Code (NEC) is a national designation, but it is not a federal statute. Local government either adopts NEC standards or writes and enforces its own electrical code in place of this.
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for each of the following systems and time intervals, s write the appropriate version of equation 8.2, the conservation of energy equation. (a) the heating coils in your toaster during the first five seconds after you turn the toaster on (b) your automobile from just before you fill it with gasoline until you pull away from the gas station at speed v (c) your body while you sit quietly and eat a peanut butter and jelly sand- wich for lunch (d) your home during five minutes of a sunny afternoon while the temperature in the home remains fixed
Option A. Heat coils in your toaster during the first five seconds after you turn the toaster on.
In physics and chemistry, the law of conservation of energy states that the full power of a remoted gadget remains steady; it's far said to be conserved over the years.
The mechanical energy E of a particle stays regular except forces out of doors the machine or non-conservative forces do paintings on it, wherein case, the trade in the mechanical electricity is equal to the paintings accomplished by the non-conservative forces: Wnc, AB=Δ(k+U)AB=ΔEAB.
In mechanics, there are three fundamental quantities that are conserved. those are power, momentum, and angular momentum. when you have looked at examples in different articles, for example, the kinetic strength of charging elephants then it is able to wonder you that electricity is a conserved quantity.
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what is the acceleration due to gravity at the surface of titania?
The acceleration due to gravity on the surface of earth is lower than that at earth. The g value for titania is 0.037 m/s².
What is acceleration due to gravity?Acceleration due to gravity is the acceleration by the force of gravitation by an object. The g value can be obtained from the mass, radius or distance and universal gravitational constant G as written below:
g = G m/r²
The acceleration due to gravity for earth is 9.8 m/s². The mass of titania is 1/1700 of the mass of earth and its radius is 1/8 times that of earth. The acceleration due to gravity for titania is:
g = G (Me/1700)/ (Re/8)²
= 64/1700 G Me/Re²
Where Me and Re be the mass and radius of earth. The g value for earth is 9.8 m/s².
Acceleration due to gravity for titania = 9.8 m/s² × 64/1700 = 0.0377m/s²
Therefore, the acceleration due to gravity of titania is 0.0377m/s².
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what is the right expression for the rotational kinetic energy of an object that is only rotating about a fixed axis through its center of mass? (i.e., the object is not translating)
The rotational kinetic energy of an object that is only rotating about a fixed axis through its center of mass is given by E_rot = 1/2 Iω^2, where I is the moment of inertia and ω is the angular velocity.
The rotational kinetic energy of an object is the energy associated with its rotation about an axis. It is equal to one-half the product of the object's moment of inertia and its angular velocity squared.
It is a form of kinetic energy and is usually represented by the symbol Krot. The rotational kinetic energy of an object depends on its moment of inertia and the angular velocity of its rotation. The equation for rotational kinetic energy is Krot= 1/2 Iω2, where I is the moment of inertia and ω is the angular velocity.
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he scale of a spring balance that reads from 0 to 15.0 kg is 12.0 cm long. a package suspended from the balance is found to oscillate vertically with a frequency of 2.00 hz. (a) what is the spring constant? (b) how much does the package weigh?
The weight of the package is mg=76.0N. In the formula , F = -kx, proportional constant k is called the spring constant.
What is spring constant?A measure of the stiffness of the spring is known as spring constant . When a spring is stretched or compressed, then its length changes by an amount x from its equilibrium length. And then, it exerts a force F = -kx in a direction towards the equilibrium position.
a) Using Hooke’s law, we can find out:
k=(15kg)(9.8m/s 2 )/(0.12m)=1225N/m.
=1.23kN/m.
b) Given, f=2.00Hz=2.00cycles/sec
Now, ω=2π(2.00)=4πrad/s
As we know that , ω= √k/m
=1225/ (4πrad/s)²
=7.76 kg
Therefore, the weight of the package is mg=76.0N.
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dentist's chair with a person in it weighs 1925 n. the output plunger of a hydraulic system starts to lift the chair when the dental assistant's foot exerts a force of 35 n on the input piston. neglecting any difference in the heights of the piston and the plunger, what is the ratio of the area of the plunger to the area of the piston?
The area of the plunger to the area of the piston will have a ratio of 0.0189.
Who defines pressure?Pressure is the amount of force that is applied perpendicularly to an object's surface divided by the area that the force is spread across. In the physical sciences, pressure is defined as the perpendicular force per unit area or the stress at a particular location within a confined fluid P represents it
The output pressure remains constant.Po=Pi
Fo/Ao=Fi/Ai
Ao/A=35/1925
Ao/Ai=.0189
Consequently, 0.2323 will be the ratio of the plunger's surface area to the piston's surface area.
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a glider on an air track is connected by a spring to the end of the air track. if it takes 0.30 s for the glider to travel the distance of 12 cm from one turning point to the other, what is the glider's angular frequency?
The angular frequency of the glider that takes 0.30 s to travel the distance of 12 cm from one turning point to another is 20.93 rad/s.
The angular frequencyThe angular frequency is the magnitude of the angle of the sector of the circle formed by the trajectory of the point that moves in a circle per unit time. Briefly, angular speed is the angular speed accompanied by the direction. The unit of angular speed is rad/second or rad/minute or rad/hour, depending on what is known from each problem.
The equation for determining the angular speed or angular frequency is:
ω= 2[tex]\pi[/tex]/T or ω = 2[tex]\pi[/tex]f
Where f = 1/T
ω = angular speed or frequency (rad/second)
[tex]\pi[/tex] = 3.14
f = frequency (rev/second)
T = period (second)
We have,
T = 0.30 s
So, ω = 2[tex]\pi[/tex]/T
= 2 (3.14) / 0.30
= 20.93 rad/s
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what is true of spiral galaxies? what is true of spiral galaxies? they evolve from giant ellipticals. they have never been seen to have large redshifts. they are only found in the center of rich galaxy clusters. they are much less common at larger redshifts. they are relatively rare in regions of high galaxy density.
The true statement about spiral galaxies is, that they are relatively rare in regions of high galaxy density.
What are Spiral galaxies?The twisted clusters of stars and gas known as spiral galaxies, which are frequently formed of hot, young stars, have striking shapes. As opposed to the other two major groups of galaxy forms, elliptical and irregular, spiral galaxies make up the majority of the galaxies that astronomers have so far discovered.
What is Density?The density of a substance reveals how dense it is in a given region. Mass per unit volume is the definition of a substance's density. In essence, density is a measurement of how closely together matter is packed. It is a special physical trait of a specific thing. Greek scientist Archimedes made the discovery of the density principle. If you are familiar with the formula and the corresponding units, calculating density is simple. Density can be symbolized by the letter D or by the symbol.
Hence, the true statement about spiral galaxies is, that they are relatively rare in regions of high galaxy density.
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for the oscillation of a simple pendulum, the time for the mass moving from the left-most to the equilibrium position is 0.5 s. find the length of the pendulum (in m)
The length of the pendulum (in m) is : 0.99m
Time period to reach from left most position to equilibrium position = 0.5s =t
Time period is defined as the time taken to complete one full oscillation
T = 0.5*4 = 2s
for sample pendulum
T = 2π[tex]\sqrt{\frac{l}{g} }[/tex]
2 = 2π[tex]\sqrt{\frac{l}{9.81} }[/tex]
l = 0.99m
The period of the pendulum does not depend on the mass of the sphere, only on the length of the chord. Two pendulums with different masses but the same length have the same period. Two pendulums of different lengths have different periods. A pendulum with a long string has a long period
A simple pendulum consists of a sphere (mass point) m suspended from a (massless) cord of length L and fixed at a pivot point P. When shifted to the initial angle and released, the pendulum swings back and forth in a periodic motion. Applying Newton's second law to a rotating system gives the equation of motion for a pendulum.
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electrons are made to flow in a wire when there is * 1 point a)an imbalance of charges in the wire b)a potential difference across its ends. c)resistance difference across its ends d) magnetic force difference across its ends
When there is a * 1 point difference in resistance across the ends of a wire, electrons start to flow through it.
What causes the direction of electron flow?From the negative terminal to the positive terminal, electrons move through the conductor. The negative terminal repels them, whereas the positive terminal attracts them.
What causes the free movement of electrons?The particles are positioned closely together and in a predictable sequence. Metal atoms' unbound outer electrons surround the tightly packed positive ions in a "sea" of delocalized or free negative charge. These free electrons are referred to as free electrons. They have unrestricted movement throughout the metallic building.
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acceleration is generally defined as the time rate of change of velocity. when can it be defined as the time rate of change of speed? group of answer choices when moving in a straight line, the time rate of change of speed is called velocity. when moving in a circle, the time rate of change of speed is always zero. when moving in a circle, the time rate of change of speed is called average speed. when moving in a straight line, the time rate of change of speed is acceleration.
When we are moving in a straight line, velocity the time rate of change of speed is acceleration.
Velocity can be described as a vector measurement of the charge and path of motion. Placed truly, speed is the velocity at which something moves in one course. The velocity of an automobile travelling north on a chief parkway and the velocity of a rocket launching into the area can each be measured using speed.
The distinctive styles of velocities are uniform speed, variable velocity, common pace and immediate pace. Uniform velocity: when a body is stated to be shifting with uniform speed if its average pace among any two factors along its course is equal in importance as well as path.
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why don't the air molecules in your room all spontaneously collect in one half of the room, leaving the other half of the room completely empty of air? newtons law
The answer is entropy here. It's quite unlikely that spontaneously air molecules moves exclusively to one half of your room. This can be explained by understanding the concept of entropy and second law of thermodynamics.
Why is the second law of thermodynamics true?Entropy is the measure of disturbance or disorder of universe.
The second law of thermodynamics states that entropy of an isolated system doesn't decrease over time.
The second law of thermodynamics is true because there are very few ways that particles can be concentrated in an area. In most situations, the particles are evenly distributed. Similarly, in a room, the particles are evenly distributed and as particles start moving, there is a nonzero probability of low entropy state, Most of the time the system will increase in entropy that is increase in disturbance evenly. Hence it is not possible that air molecules will collect in one part of the room and not on the other part.
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1. If the velocity of an object changes from 20 m/s to 50 m/s over the course of 5
seconds, what is its acceleration?
2. if the velocity of an object changes from 40 m/s to 10 m/s over a time interval of 2
seconds what is its average acceleration? Help please
The accelaration is 15 ms.
What is accelaration?Acceleration (a) is the reason that change in velocity (Δv) over to the change in time (Δt).
represented by the equation to a = Δv/Δt. This allows you to measure how fast velocity by the changes in meters per second squared (m/s^2).
1 . Here the change in to the velocity is (50-20) or 30 m/s
And the time interval by to the 5
So acceleration is 30/5 or 6 ms^-2
2. Here the change is the (40-10) or 30 m/s in time is the interval is 2 second
So acceleration is 30/2 or 15 ms^-2.
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the right edge of the circuit in the figure extends into a 50 mt uniform magnetic field.
The magnitude of the circuit is 2.5*10^-2. Since the circuit's right edge in the illustration extends into a 50 mt uniform magnetic field, Rightward is the direction of the magnetic force.
According to the left hand rule, the thumb of the left hand points in the direction of force when the middle finger and index finger point in the direction of current and magnetic field, respectively. The magnetic field and the downward direction are indicated by the way the current in this circuit flows, which is from top to bottom. The thumb points to the right if the index finger points into the page and the middle finger points downward. Thus, the direction of the magnetic force is towards right.
F = (5.0)(10)(50mT)(10^-3/1)(sin90)
F = 2.5*10^-2N
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The complete question is -
The Right Edge Of The Circuit In The Figure Extends Into A 50 MT Uniform Magnetic Field. What Are The Magnitude of the circuit.
The wave function for a traveling wave on a taut string is (in SI units)
y(x,t) = 0.375 sin (14pt - 2px + p/4)
(a) What are the speed and direction of travel of the wave?
speed _____ m/s
direction_________
(positive x-direction, positive y-direction, positive z-direction, negative x-direction, negative y-direction, negative z-direction)
(b) What is the vertical position of an element of the string at t = 0, x = 0.178 m?
________m
(c) What is the wavelength of the wave?
____________m
(d) What is the frequency of the wave?
________ Hz
(e) What is the maximum transverse speed of an element of the string?
_____ m/s
(a) The speed and direction of travel of the wave is 7 m/s positive x-direction.
(b) The vertical position of an element of the string at t = 0, x = 0.178 m is -3.1 m
(c) The wavelength of the wave is 2 m
(d) The frequency of the wave is 7 Hz
(e) The maximum transverse speed of an element of the string is 16.48 m/s.
The wave functionThe general function of the wave is:
y (x, t) A sin (kx - ωt)
We have, y(x, t) = 0.375 sin (14[tex]\pi[/tex]t - 2[tex]\pi[/tex]x + [tex]\pi[/tex]/4)
So,
a. the speed and direction of travel of the wave:
v = ω/k
= 14/2
= 7 m/s ⇒ positive x-direction
b. The vertical position of an element of the string at t = 0, x = 0.178 m
y = 0.375 sin (-2[tex]\pi[/tex]x/14 + [tex]\pi[/tex]/4)
= -3.1 m
c. The wavelength of the wave:
λ = 4/2
= 2 m
d. The frequency of the wave
f = ω/2
= 14/2
= 7 Hz
e. The maximum transverse speed of an element of the string:
ωA
= 14π (0.375)
= 16.48 m/s
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the warning tag on a lawn mower states that it produces noise at a level of 85 db. what is the intensity of this in watts per meter squared?
The energy density (energy per unit volume) at a given location in space can be calculated by multiplying it by the energy's velocity. The units of power are split by the resulting vector's area.
What is an illustration of intensity?
The degree, volume, or magnitude of something is its intensity. Examples include fire, emotion, weather, work, or passion. The word "intensity" is occasionally linked to fervor, fire, and violence. It is employed when describing the intensity of something like a flame or possibly a love affair.
What is the level of scientific rigor?
The intensity of a wave is the amount of energy it transports over a surface in a unit of time and area. It is also equal to the energy density times the wave speed. Watts per square meter are typically used to measure it. A wave's strength and amplitude will affect intensity.
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at nigeria falls. if 505 kg of water fall a distance of 50 m what is the increase in the internal energy of the water at the bottom of the falls? assume all initial potential energy goes into increasing the waters internal energy and that the kinetic energy is zero
help pleaseee
The increase in the internal energy of the water at the bottom of the falls is 247,450 J.
What is the potential energy of a body at a given height above the ground?The potential energy of a body at a given height above the ground is given as the energy that a body possesses due to the height it is above the ground.
Potential energy is given mathematically as, PE = m * g * h
where;
PE is equal to the potential energy of the bodym is the mass of the bodyg is the acceleration due to gravity h is the height of the body above the groundFor the given mass of water, the increase in the internal energy of the body is calculated as follows:
Change in internal energy = Potential energy
Change in internal energy = 505 * 9.8 * 50
Change in internal energy = 247,450 J
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Is it possible for an object that has constant acceleration to also have a changing velocity?
Explain.
Sure, it can.Your inquiry specifies "constant acceleration" as a criterion.The example with constant acceleration with varying trajectory is parabolic motion.
What does parabolic motion mean?Gravity will cause an object travelling forward in a single direction to fall inside a parabolic arc.The trajectory of a projectile travelling forward due to the momentum of the an initial thrust becomes parabolic because projectiles are objects that are exclusively impacted by gravity.
What does parabolic motion look like?When water is held at an angle and connected to a source of water or even a water tap, the water flows out in a projectile motion.Because the water tends to move both vertically and horizontally at the same time, its route is unmistakably parabolic.
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a spider hangs by a strand of silk at an eye level 40 cm in front of a plane mirror. you are behind the spider, 68 cm from the mirror.
Your eye as well as the spider's image in the mirror are 1.28 meters apart.
What is mirror, in a brief?A mirrors is a luminance that reflects light and creates an actual or fictitious picture. An device that returns an image is a reflector or looking glass, which reflects the image of the object when it is positioned in front of it. When focused through an eye or camera lens, light that reflects off a mirror will reveal an image of everything that was in front of it. Mirrors reflect light at an equal but opposite angle, reversing the orientation of the image.
Briefing:The image distance is equal to the object distance:
Distance between the spider and mirror = 40cm
So, the image is formed 40cm inside the mirror
Distance between the person and mirror = 68cm
Distance between the image and person = 68+40= 128cm
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