A compressed spring does not have elastic potential energy.
O True
O False.


help please

Answer:

A

Explanation:

The formula that denotes how the speed of light is related to its wavelength and frequency is option a. c = λf.

This formula, known as the wave equation, expresses the relationship between the speed of light (c), the wavelength of light (λ), and the frequency of light (f). It states that the speed of light is equal to the product of its wavelength and frequency. This means that as the wavelength of light increases, its frequency decreases, and vice versa. This formula is important in understanding the behavior of light in various mediums, as well as in the study of electromagnetic radiation in general. It is commonly used in fields such as physics, optics, and chemistry to calculate the properties of light.

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The change in electrical potential energy of a single potassium ion as it moves across the membrane is determined by the difference in the electrical potential energy of the ion on either side of the membrane.

What is  Energy?

Energy is the capacity for doing work. It can take on many forms, including mechanical, electrical, chemical, thermal, and nuclear energy. Energy can be converted from one form to another, and it can be used to do work or to produce heat.

Step 1: Calculate the charge of a single potassium ion.

Charge of potassium ion = 1 x 1.602 x 10^-19 Coulombs

Step 2: Calculate the change in potential.

Change in potential = 70.5 mV

Step 3: Calculate the change in electrical potential energy.

Change in electrical potential energy = Charge of potassium ion x change in potential

= (1.602 x 10^-19 Coulombs) x (70.5 mV)

= 1.13 x 10^-17 Joules

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Answer:

5 m/s due West

Explanation:

​(a) The change in speed of the car can be found using the Pythagorean theorem, which states that the square of the hypotenuse of a right triangle is equal to the sum of the squares of the other two sides. In this case, the change in speed is the magnitude of the change in velocity, and is given by:

change in speed = sqrt((25 m/s)^2 + (30 m/s)^2) = 39.05 m/s (rounded to two decimal places)

Therefore, the change in speed of the car is approximately 39.05 m/s.

(b) The change in velocity of the car can be found by subtracting the initial velocity from the final velocity. The initial velocity was 30 m/s due East, and the final velocity was 25 m/s due South. To subtract these velocities, we need to use vector subtraction. This involves breaking the velocities into their x and y components and subtracting the components separately. The x component of the initial velocity is 30 m/s, and the x component of the final velocity is 0 m/s. The y component of the initial velocity is 0 m/s, and the y component of the final velocity is -25 m/s. Therefore, the change in velocity of the car is:

change in velocity = final velocity - initial velocity = (-30 m/s) - (-25 m/s) = -5 m/s due West

Therefore, the change in velocity of the car is 5 m/s due West.

Answer:

average value of the resulting force

Explanation:

The average module value of this resulting force is equivalent to 2.0. 10⁵ N.

The impulse of a force can be calculated by the product of the intensity of the force applied by the time interval in which it is applied -

I = F.Δt

Where,

F = Strength in Newtons

Δt = time interval in seconds

I = Impulse in N.s

The impulse of a force is equivalent to the variation of the amount of movement it causes in the body.

I = ΔQ

The amount of movement is a vector quantity that results from the multiplication of the mass of a body by its speed. Its direction and direction are the same as the velocity vector of the body.  

Q = m-V

As the car goes to rest after the application of force, the amount of final movement of the car is equivalent to zero.

I = 0 - mV

F. Δt = - mV

F. 0,1 = - 1000. 20

F = - 20000/0,1

F = 200,000 N

F = 2,0. 10⁵ N

A coin is sitting on a vinyl lp. if the coefficient of static friction is 0.57, The fastest rate of rotation with which the vinyl LP can rotate without slipping off the edge is 0.033 m/s.

This is because the static friction force Fs is related to the normal force Fn and the coefficient of static friction μs by the equation:


Fs = μs * Fn

Given that the coefficient of static friction is 0.57, the static friction force Fs is equal to 0.57 * the normal force Fn.


The normal force Fn is equal to the mass of the coin times gravity, Fn = mg.


Therefore, the static friction force Fs is equal to 0.57mg.


The maximum torque Tmax is equal to the static friction force Fs times the radius of the vinyl LP r, or Tmax = Fs * r.


Therefore, the maximum torque Tmax is equal to 0.57mg * r.


The angular velocity ω is equal to the maximum torque Tmax divided by the moment of inertia I, or ω = Tmax / I.


Therefore, the angular velocity ω is equal to 0.57mg * r / I.


Finally, the fastest rate of rotation with which the vinyl LP can rotate without slipping off the edge is equal to the angular velocity ω in m/s. Converting from radians per second to m/s yields 0.033 m/s.

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Answer:

The magnetic field strength is H=I/2πr

Explanation:

A current I through a long, straight wire produces a magnetic field with strength H=2πr at distance of r from the wire. So the field strength is inversely proportional to the distance from the wire.

A student drops a ball and it falls downward. Types of energy are involved in this energy transformation are kinetic and gravity potential.

Energy is defined as the capacity of a physical system to perform work.

Types of energy are Kinetic energy and potential energy.

The energy an object has as a result of motion is known as kinetic energy. Applying force to an object will cause it to accelerate.

Potential energy is the energy that is stored in any object or system as a result of its position or component arrangement.

A student drops a ball and it falls downward then there is kinetic energy due to motion and potential energy due to height.

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Answer:

The moment of inertia should be decreased.

Explanation:

The torque is given by

Torque = Moment of inertia x angular velocity

To keep the torque constant, the spin rate be increased when the moment of inertia decreases.  

The moment of inertia of the body are the efforts to put the object in rotation.  

The correct option: (e) There is a negative charge on the surface of the cavity, and a positive charge on the outer surface of the conductor.

Any extra charge on the a conductor will be located on its surface, according to Gauss' Law.

Thus, on the cavity's surface there is a negative charge, while the conductor's outer surface has a positive charge.

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The complete question is-

A positive point charge is placed in a cavity inside a neutral conductor without transferring charge to the conductor. What is the sign of the charge on the surface of the cavity and the outer surface of the conductor?

(a) There is no charge on the surface of the cavity or the outer surface of the conductor.

(b) There is a positive charge on the surface of the cavity, but no charge on the outer surface of the conductor.

(c) There is a negative charge on the surface of the cavity, but no charge on the outer surface of the conductor.

(d) There is no charge on the surface of the cavity, but a positive charge on the outer surface of the conductor.

(e) There is a negative charge on the surface of the cavity, and a positive charge on the outer surface of the conductor.

The earliest astronomical records appear to have been made by the ancient Chinese, Egyptians, and Babylonians in order to determine when to hunt plants and animals

A conceptual investigation of the properties of astronomical records and the links that exist between various types of data yields an astronomical records data model.

The paintings on cave walls that date back 30,000 years are the earliest records of astronomical observations that we have. The night sky piqued their keen curiosity in the ancient Egyptians. They were particularly captivated by two bright stars that were constantly seen orbiting the North Pole.

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The picture position travels away from the mirror as the object approaches it, and the image size increases (but the image is still inverted).

A force pushing or pulling an object will cause it to move in that direction. The acceleration increases as the force and object weight increase. Moreover, it can cause something to shift pace, direction, or tempo.

The primary forces that produce motion are gravity and friction. The motion of an object will change if one, both, or both forces are changed. The force that draws two objects together is called gravity. The amount of "stuff" in an object, or its mass, is the same for everything.

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Answer:

I believe that the Big Bang Theory is a valid explanation for the beginning of time. Areas of research that have the greatest potential for more discovery include dark matter and dark energy, the nature of the inflationary period, and the origin of the matter-antimatter asymmetry.

Problems with the Big Bang Theory that lead me to reject it include the lack of a satisfactory explanation for the origin of the initial conditions of the universe, the lack of a satisfactory explanation for the origin of the matter-antimatter asymmetry, and the lack of a satisfactory explanation for the origin of the inflationary period. An alternate theory could be the Cyclic Universe Theory, which proposes that the universe goes through an infinite cycle of expansion and contraction.

Answer:

jumping, pulling a elastic band, bouncing a ball

Explanation:

when you jump, your legs apply a force to the ground, and the ground applies and equal and opposite reaction force that propels you into the air.

When we pull an elastic band, it automatically returns to its original position. The more you pull the more force it generates. This is the same when you pull or compress a spring. The action (applied force) is stored as energy and is released as a reaction with an equal and opposite force

A ball is able to bounce because of the reaction from the ground. If there was no reaction then the ball would not bounce but rather stick to the ground.

Answer:

5 Oxygen , 3 Carbon dioxide and 3 water

Answer: the answer is 5

The potential difference between xi = -30 cm and xf = 60 cm for the given electric field is -135 V.

To find the potential difference follow these steps:
1. Convert the given positions from centimeters to meters: xi = -0.3 m and xf = 0.6 m.
2. Calculate the potential difference using the formula ΔV = -∫(E(x) dx) over the interval [xi, xf].
3. Integrate the electric field function, Ex = -1000 x, with respect to x: ∫(-1000 x dx) = -500 x² + C, where C is the integration constant.
4. Find the potential difference by evaluating the integral at the given points: ΔV = -500 (xf² - xi^2) = -500 (0.6² - (-0.3)^2) = -500 (0.36 - 0.09) = -500 (0.27).
5. Calculate the result: ΔV = -500 * 0.27 = -135 V.

The potential difference between xi = -30 cm and xf = 60 cm for the given electric field is -135 V.

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When charged particles move through a conductor such as copper wire, the electric charge moves. Specifically, the negatively charged electrons in the wire move in response to the electric field produced by the battery or other source of electrical energy.

As the electrons move, they collide with other atoms and transfer energy, causing a flow of charge through the wire. This flow of charge is called an electric current and is measured in amperes (A). In a direct current (DC) circuit, the electrons flow in one direction, while in an alternating current (AC) circuit, the electrons change direction periodically, producing a fluctuating current.

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Answer:

If I had to guess I would say this is what the question fully looks like:

A block having mass m travels along a horizontal frictionless surface with speed vx. What impulse must be delivered to the mass to reverse its direction and continue to travel with a speed of vx?

A) -mvx

B) -2mvx

C) 0

D) 2mvx  

E) mvx

F) none of the above

G) cannot be determined

Explanation: The answer is

The initial momentum is m vx. So what change do you need to have a momentum -m vx afterwards? -2 m vx, because m vx + (-2m vx) = - m vx

So the correct answer is b.

The impulse must be delivered to the mass to reverse its direction and continue to travel with a speed of vx having a mass of m is  -2mvx.

Momentum is metric for power and how challenging it is to stop an object. Zero momentum applies to any object that is not moving. Tremendous, slow-moving objects have large amounts of impulse.

A small, swiftly moving object also possesses significant momentum. A bowling ball, for instance, has more momentum than a ping-pong ball if its velocities are equal. This is because bowling balls are larger in mass than ping-pong balls.

Given:

The mass of the block, m = m kg,

The speed of block, v = vx m / s,

The changed speed, V = -vx m / s

Calculate the impulse by using momentum conservation as shown below,

Initial momentum  = changed momentum

-mvx = X + mvx

X = -2mvx

Therefore, the impulse must be delivered to the mass to reverse its direction and continue to travel with a speed of vx having a mass of m is  -2mvx.

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Answer:

electromagnetic waves

Answer:

resultant force=16N→(TOWARDS THE DIRECTION OF 8N)

Explanation:

resultant force=8N+13N-5N

                        =16N→(TOWARDS THE DIRECTION OF 8N)

Since the displacement is equal to zero, the velocity from 30 to 40s will also be zero.

Velocity is the distance travelled by a body in a specific direction per time taken. It is measured in meter per second. That is, m/s

Given that a car started its journey at point A. After 30 seconds, the car had reached point B. The car stops at point B for 10 seconds. Then, the car turned around and arrived at point A after 15 seconds. The car stopped at point A for 20 seconds. The car then went on his way and get to the point C after 10 seconds.

To find the velocity from 30 to 40s, we must realize that velocity can also be defined as;

Velocity = displacement / time

The displacement from point A to B and back to A is equal to zero.

Therefore, The velocity from 30 to 40s is also zero.

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The sun is Yellow, red, orange, and blue. Therefore option B is correct.

The star is moving toward an observer. Therefore option B is correct.

39. The type of radioactive decay represented by the equation provided Gamma. Therefore option A is correct.

40. The statement is completed correctly by the information which states that the coal in Alberta has a lower carbon content than coal in other parts of Canada, resulting in reduced greenhouse gas emissions.

29. graph B depicts the relationship between gravitational field strength and the mass of the International Space Station orbiting Earth.

30. The correct sequence of colors representing the changing temperature from the surface to the atmosphere of the sun is Yellow, red, orange, and blue. Therefore option B is correct.

1. When a star undergoes a blue shift, it indicates that the star is moving toward an observer. Therefore option B is correct.

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The force experienced by the passenger is approximately 394 N. The correct option is A. To find the force experienced by a passenger during acceleration, we can use the formula F = m * a, where F is the force in Newtons, m is the mass of the passenger, and a is the acceleration.

First, we need to convert the acceleration from km/h to m/s. To do this, we'll use the conversion factor 1000 m/km and 3600 s/h.

(100.0 km/h) * (1000 m/km) / (3600 s/h) = 27.78 m/s

Next, we need to find acceleration, which is the change in velocity divided by time. The initial velocity is 0 m/s, and the final velocity is 27.78 m/s. The time is given as 4.80 s.

a = (27.78 m/s - 0 m/s) / 4.80 s = 5.79 m/s²

Now we can find the force experienced by the passenger.

F = m * a = 68.0 kg * 5.79 m/s² = 393.72 N.

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An appropriate value for the resistance in parallel with the smoothing capacitor would be 1.59 kΩ.

To ensure good tracking of the AM envelope, the resistance in parallel with the smoothing capacitor should be low enough to discharge the capacitor quickly during the troughs of the modulated signal, but high enough to avoid discharging it too quickly during the peaks of the signal.

The time constant (τ) of the RC circuit formed by the smoothing capacitor and the parallel resistance is given by the formula:

τ = RC

where R is the resistance and C is the capacitance.

To determine an appropriate value for the resistance, we need to calculate the time constant and compare it to the period of the modulated signal.

The period of a 500 kHz signal is T = 1/f = 2 μs. The modulating signal has a bandwidth of 5 kHz, which means its period is 200 μs.

Assuming a small signal approximation, we can use the formula for the time constant to calculate an appropriate value for the resistance:

τ = 20 nF × R = T/2π = 31.8 ns

Solving for R, we get:

R = τ/C = 31.8 ns / 20 nF = 1.59 kΩ

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Complete question is:

The input signal into an envelope detector is an am signal of carrier frequency 500 khz. the envelope detector employs a smoothing capacitor of 20 nf. the modulating signal has a bandwidth of 5 khz. specify an appropriate value for the resistance in parallel with the smoothing capacitor for a good tracking of the am envelope.

The object's angular velocity is not increasing at all, and remains constant. The torque acting on the object is 5.4 Newton meters (N/m).

The angular acceleration of the object can be found using the formula:

angular acceleration = (change in angular velocity) / time

In this case, the change in angular velocity is 3.0 rad/s per second, and we don't know the time. However, we can use another formula that relates angular acceleration, moment of inertia, and torque:

torque = moment of inertia x angular acceleration

Assuming there are no external torques acting on the object, we can set the torque to zero and solve for the angular acceleration:

angular acceleration = 0 / moment of inertia

Plugging in the given moment of inertia of 1.8 kg⋅m2, we get:

angular acceleration = 0 / 1.8 kg⋅m2 = 0 rad/s2

This means that the object's angular velocity is not increasing at all, and remains constant. If there were an external torque acting on the object, we would need to take that into account and use the first formula to find the angular acceleration.

Given that an object's moment of inertia (I) is 1.8 kg⋅m² and its angular acceleration (α) is 3.0 rad/s², we can find the torque (τ) acting on the object using the following formula:

τ = I × α

Identify the known values.
Moment of inertia, I = 1.8 kg⋅m²
Angular acceleration, α = 3.0 rad/s²

Apply the formula to find the torque.
τ = (1.8 kg⋅m²) × (3.0 rad/s²)

Calculate the torque.
τ = 5.4 N⋅m

So, the torque acting on the object is 5.4 Newton meters (N⋅m).

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Both stars A and B will have the same brightness to the earth because luminosity is dependent on the temperature and size where A is hotter but smaller and B is bigger but colder.

There are several factors that determine the luminosity of a star namely, the size, temperature, distance and magnitude. The two main factors that determine luminosity of a star when the distance is the same are temperature and size.

When the temperature of a Star is higher than the other with equal distance from the earth the star is brighter than that with lower temperature. Also, when the size of a star is bigger, it possesses a higher surface area to absorb light and energy. This makes A and B as bright as the other.

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Answer:

Explanation:

The potential energy of a body can be found by using the formula

PE = mgh

where

m is the mass

h is the height

g is the acceleration due to gravity which is 9.8 m/s²

From the question we have

PE = 3 × 9.8 × 12

We have the final answer as

Hope this helps you