when the distance between two masses doubles, the strength of the gravitational force between them ―

Answer:

the faster an object moves the more kinetic it has. the more mass an object has, the more kinetic energy it has.

Answer: No , a chemical change has not occured as it was easily reversed.

Explanation:

Chemical change is defined as a change in which rearrangement of atoms take place and leads to formation of new substances. It can only be reversed with the help of a chemical reaction.

Physical change is defined as a change which leads to change in shape, size or state of the substance changes. No new substance is formed.It can be easily reversed.

As the hair colour was washed out and returned to its original brown colour, it was a physical change.

Answer:

E/f = h

Explanation:

Step 1: Write equation

E = hf

Step 2: Divide both sides by f

E/f = h

Answer:

cm and cm²

Explanation:

volume is three dimensional

cm² is in relation to area and cm is in relation to the length of the object... to find the volume getting a base area times the length gives you volume of the object

(cm²×cm=cm³)... attempted illustration

Answer:

m³, cm³, km³

Explanation:

The addition of any numbers of vector provide the magnitude as well as the direction of the resultant vector, hence the mentioned first option is not true.

The addition of vector required to connect the head of the one vector with the tail of the other vector and any vector can be moved in the plane parallet to the previous location, so, the mentioned second and third options are true.

The true statement is C. Wires made of conductors have low resistance

Materials that permit passage through them are called conductors. Insulators are substances that don't allow electricity to travel through them. Silver, copper, and aluminium are a few examples of typical conductors. A few common insulators are glass, rubber, plastic, and wood. An item or category of material that allows the flow of charge in one or more directions is referred to as a conductor.

Electrical conductors are usually made of metal-based materials. Good conductors offer minimal resistance to the passage of electricity. They act in this manner because they contain several free electrons. In insulators, there are no free electrons. As a result, virtually little electric current passes through them even when voltage is applied across them. Thus, Wires made of conductors have low resistance

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Complete Question:

Which is true of the material that makes up wires?

A. Wires made of conductors have high resistance.

B. Wires made of conductors have greater resistance.

C. Wires made of conductors have low resistance.

Answer:

90 kgm/s

Explanation:

Its value is 9.8 m/s2 on Earth. That is to say, the acceleration of gravity on the surface of the earth at sea level is 9.8 m/s2

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Answer:

The geosphere consists of the solid Earth and the atmosphere consists of the gaseous components in the air. Thus, the answer is C.

Explanation:

Answer:

C

Explanation:

To determine the position u of the mass at any time t, we can use the equation of motion for a mass-spring system without damping:n m * u''(t) + k * u(t) = 0

m = 2 lb / (32.2 ft/s^2) = 0.062 lb·s^2/ft

The spring constant k can be determined using Hooke's law:

k = F / x

where F is the force exerted by the mass and x is the displacement. In this case, the force F is the weight of the mass, and the displacement x is 6 in:

k = (2 lb) / (6 in) = (2 lb) / (6 in) * (1 ft/12 in) = 0.111 lb/ft

The equation of motion now becomes:

0.062 * u''(t) + 0.111 * u(t) = 0

To solve this second-order linear homogeneous differential equation, we assume a solution of the form u(t) = A * cos(ωt + φ).

Substituting this assumed solution into the equation of motion, we get:

-0.062 * A * ω^2 * cos(ωt + φ) + 0.111 * A * cos(ωt + φ) = 0

-0.062 * ω^2 + 0.111 = 0

Solving for ω, we get:

ω = sqrt(0.111 / 0.062) = 2.258 rad/s

From ω, we can determine the frequency f and period T:

f = ω / (2π) = 2.258 / (2π) ≈ 0.359 Hz

T = 1 / f ≈ 2.786 s

The amplitude A is determined by the initial conditions. When the mass is pulled down an additional 3 in (0.25 ft) and released, it reaches its maximum displacement, so A = 0.25 ft.

Therefore, the position u of the mass at any time t is given by:

u(t) = 0.25 * cos(2.258t)

To draw the graph of u(t), plot the position u on the y-axis and time t on the x-axis, using the equation u(t) = 0.25 * cos(2.258t). The graph will be a cosine wave with an amplitude of 0.25 ft.

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Answer:

The answer is below

Explanation:

Plants that grow among many tall trees in a dense forest could adapt so that they could get enough air and water through the following means:

1. By becoming climbers. Here they climb up the nearby trees to get more air and sunlight.

2. Plants grow leaves that have pointed tips. This allows the passage of water in the plant's leaves without causing damage.

3. Some plants grow as epiphytes, where they grow on big trees' canopy

Answer:

go girl

Explanation:

i'm feom public uni too

To determine the corresponding values of the mean velocity (um) and mean temperature (tm), we first need to measure the velocity and temperature at different points in the fluid. We can then calculate the mean velocity and temperature using these measurements.



The mean velocity (um) is the average velocity of the fluid over a given area. It is calculated by dividing the total volume flow rate by the cross-sectional area of the flow. The mean temperature (tm) is the average temperature of the fluid over a given area. It is calculated by taking the average of the temperature measurements at different points in the fluid.

To plot the velocity and temperature distributions, we need to measure the velocity and temperature at different points in the fluid and plot them on a graph. We can then connect the data points to get a visual representation of the distribution.

Whether or not the values of um and tm appear reasonable will depend on the specific system being studied. We would need to compare our results to previous studies or theoretical models to determine if our values are reasonable.

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Answer:

Explanation:

The time taken can be found by using the formula

\( t = \frac{d}{v} \\ \)

d is the distance

v is the velocity

From the question we have

\(t = \frac{3.5}{4.8} \\ = 0.72916...\)

We have the final answer as

Hope this helps you

The wavelength of a 650.00 Hz sound in air at room temperature and pressure, where the velocity of sound is 344 m/s, is approximately 0.529 m.

Sound waves travel through a medium by creating compressions and rarefactions. The wavelength of a sound wave is the distance between two consecutive points that are in phase, such as two compressions or two rarefactions. To calculate the wavelength, we can use the formula: wavelength = velocity of sound / frequency.

In this case, the frequency of the sound is 650.00 Hz, and the velocity of sound in air at room temperature and pressure is 344 m/s. Plugging these values into the formula, we get: wavelength = 344 m/s / 650.00 Hz = 0.529 m.

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If moving with a constant velocity, the position-time graph is a straight line with a constant slope.

What is a position time graph?

A position-time graph, also known as a displacement-time graph or distance-time graph, is a visual representation of the relationship between an object's position and time. In this type of graph, the position of an object is plotted on the vertical y-axis, while the time is plotted on the horizontal x-axis.

The position of the object at a specific time is shown by a point on the graph. Connecting these points results in a line that represents the object's motion over time. The slope of this line can provide information about the object's velocity or speed.

Position-time graphs are commonly used in physics to study the motion of objects, such as in the analysis of freefall, projectile motion, and uniform circular motion. By examining changes in position over time, scientists can calculate acceleration, displacement, and other important characteristics of an object's motion.

Therefore,If moving with a constant velocity, the position-time graph is a straight line with a constant slope.

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If you are moving with an accelerating velocity in Activity 1-1, then your position-time graph will be curved instead of linear.

Velocity is a vector quantity that measures the rate of change of an object's position. It is the rate at which an object's position changes over time and is usually expressed in terms of meters per second. Velocity can be calculated by taking the displacement of an object divided by the time it took for that displacement to occur. Velocity can also be expressed in terms of speed and direction, as it has both magnitude and direction. Velocity can be further defined as the rate at which an object's momentum changes. Momentum is the product of an object's mass and its velocity. In addition, velocity is important for understanding the physics of motion, as it is related to acceleration, which is a measure of how quickly an object's velocity changes.

The curve will be increasing at a steeper and steeper rate, indicating that your velocity is increasing.

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Answer:

the stars which are red in color are cool.

Explanation:

The stars which has reddish color are cool in nature while those stars which has white and blue in color are very hot in nature. The stars change its color when they becomes hotter , first the star color reddish when they are cool but with increasing temperature it changes the color from reddish to orange then yellow. After yellow it turns green and finally get blue color when the stars are very very hot.

Resistance (R) = 9.375 ohm (Ω)

Steps:

\(R = \frac{V}{I} \)

\( = \frac{12 \: volt}{1280 \: milliampere} \)

\( = \frac{12 \: volt}{1.28 \: ampare} \)

\( = 9.375 \: ohm (Ω)\)

To determine the mass of the ball, we can use the equation for kinetic energy:

Kinetic Energy (KE) = (1/2) * mass * velocity^2

Given:

Kinetic Energy (KE) = 788.1 J

Velocity = 4.81 m/s

Plugging in the values, we have:

788.1 J = (1/2) * mass * (4.81 m/s)^2

To solve for the mass, we can rearrange the equation as follows:

mass = (2 * KE) / velocity^2

Substituting the given values:

mass = (2 * 788.1 J) / (4.81 m/s)^2

mass = 2 * 788.1 J / (4.81 m/s)^2

Calculating this expression, we find:

mass ≈ 68.32 kg

Therefore, the mass of the ball is approximately 68.32 kg.

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(a) The free-electron concentration, n, for the particular metal is __________ (units).

(b) The probability of the energy of free electrons being between 0 and Fermi energy at a temperature of 135°C is ________.

(c) The temperature at which the metal would have a 50.1% probability of electron energies falling between 0 and EF is ________°C.

The free-electron concentration, n, can be determined using the Fermi energy (EF) of the metal. The relationship between EF and n is given by the Fermi-Dirac distribution. To calculate the value of n, additional information such as the band structure or effective mass of the electrons is required.

The probability of the energy of free electrons being between 0 and EF can be determined using the Fermi-Dirac distribution function, which describes the distribution of electrons in energy levels at a given temperature. By integrating the distribution function over the specified energy range, the probability can be calculated.

To find the temperature at which the metal would have a 50.1% probability of electron energies falling between 0 and EF, we need to solve for the temperature in the Fermi-Dirac distribution equation. By equating the integral of the distribution function from 0 to EF to 0.501, we can solve for the temperature.

In summary, the free-electron concentration (a) depends on additional factors beyond the given information, the probability of energy range (b) can be determined using the Fermi-Dirac distribution, and the temperature (c) can be found by solving the Fermi-Dirac distribution equation for a specific probability.

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Explanation:

Distance = rate × time

1 m = (2.99792×10⁸ m/s) t

t = 3.33565×10⁻⁹ s

Light is the fastest thing in the universe. The speed of light is 2.99792 x 10⁸ m/s . The time that light takes to cover a distance of 1 meter is just 3.39  x 10⁻⁹seconds.

Speed is a physical quantity that means the distance in meter covered by a moving body in one second.  The speed of light is  2.99792 x 10⁸ m/s. Light from sun only takes 8 min to travel to the earth surface.

The speed of a moving particle or wave is mathematically the ratio of distance and time. Thus time of travel can be found out from the distance and speed.

It is given that the distance travelled by light is 1 m and its speed is 2.99792 x 10⁸ m/s. Thus the time taken to  travel is calculated as follows:

Time = distance/speed

         = 1 m/ (2.99792 x 10⁸ m/s)

         = 3.39  x 10⁻⁹s

Therefore, the time that light takes to cover a distance of 1 meter is just 3.39  x 10⁻⁹seconds.

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Answer:

your answer is

Explanation:

True

hope this helps!

The scaling law for volume displacement, v(t, p), in terms of scaling exponents aₜ and aₚ is given by v(t, p) = aᵥ / (∂G/∂(λₐ⋅t)).

The scaling law for v(t, p) in terms of aₜ and aₚ, we can start with the given expression for the Gibbs energy scaling function:

λG(t, p) = G(λₐ⋅t, λₐ⋅p)   ---(1)

We differentiate this equation with respect to pressure (p) while treating t as a constant:

∂(λG)/∂p = (∂G/∂p)⋅(∂(λₐ⋅p)/∂p)

The derivative of λₐ⋅p with respect to p is λₐ. Now, using the relation v = (∂p/∂G), we can rewrite the above equation as:

v(t, p) = (∂p/∂G) = (∂(λG)/∂p) / (∂(λₐ⋅p)/∂p) = (∂G/∂p) / λₐ

Since G is a function of λₐ⋅t and λₐ⋅p, we can express ∂G/∂p as:

∂G/∂p = (∂G/∂(λₐ⋅p))⋅(∂(λₐ⋅p)/∂p)

Plugging this back into the equation for v(t, p), we get:

v(t, p) = (∂G/∂(λₐ⋅p)) / (λₐ⋅(∂(λₐ⋅p)/∂p))

Now, substitute the scaling function λG(t, p) from equation (1) into the above equation:

v(t, p) = (∂(λG)/∂(λₐ⋅p)) / (λₐ⋅(∂(λₐ⋅p)/∂p))

Simplifying further, we obtain:

v(t, p) = (∂(G(λₐ⋅t, λₐ⋅p))/∂(λₐ⋅p)) / (λₐ⋅(∂(λₐ⋅p)/∂p))

Using the chain rule of differentiation, we can rewrite the numerator as:

∂(G(λₐ⋅t, λₐ⋅p))/∂(λₐ⋅p) = (∂G/∂λₐ⋅t)⋅(∂(λₐ⋅t)/∂(λₐ⋅p))

Since (∂(λₐ⋅t)/∂(λₐ⋅p)) = (∂t/∂p), we can further simplify the expression:

v(t, p) = (∂G/∂λₐ⋅t) / (λₐ⋅(∂t/∂p))

Introduce the volume displacement scaling factor aᵥ as:

v(t, p) = aᵥ⋅(∂G/∂λₐ⋅t) / (λₐ⋅(∂t/∂p))

Comparing this equation with the desired form v(t, p) = aₜ⋅(∂t/∂p), we can conclude that:

aₜ = aᵥ / (∂G/

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Here we have to calculate horizontal distance and vertical displacement of a ball thrown at a particular angle and a particular speed.

How to calculate horizontal distance and vertical displacement？

The ball is thrown at an angle, θ=30o.

Initial velocity of the ball, u=15 m/s

Horizontal range of the ball, R=12.3 m

We know that, R=u cosθ t,

where t is the time of flight

⟹t=53​17.3​=2 secs

using equation of motion we get:-

−h=ut−1/2gt²

=15×2−1/2×9.8×2²=−10.4

⟹ Height at which the ball reaches, h=10.4 m

The vertical distance fallen during each consecutive second will increase. (i.e., there is a vertical acceleration).

The vertical displacement follows the equation above (y = 0.5 • g • t2).

Furthermore, since there is no horizontal acceleration, the horizontal distance traveled by the projectile each second is a constant value -

Formula for horizontal distance is

x= vix × t=20 m/s

Thus, the initial horizontal velocity of 20 m/s. Thus, the horizontal displacement is 20 m at 1 second, 40 meters at 2 seconds, 60 meters at 3 seconds, etc. We can tabulate it as shown in the attachment.

TIME HORIZONTAL DISPLACEMENT

0 s          0 m

1 s          30 m

2 s          60 m

3 s          90 m

4 s          120m

5 s           150 m

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Answer:

9.0 m/s/s

Explanation:

Given the following data;

Initial velocity = 10 m/s

Final velocity = 55 m/s

Time = 5 seconds

To find the average acceleration;

In physics, acceleration can be defined as the rate of change of the velocity of an object with respect to time.

This simply means that, acceleration is given by the subtraction of initial velocity from the final velocity all over time.

Hence, if we subtract the initial velocity from the final velocity and divide that by the time, we can calculate an object’s acceleration.

Mathematically, acceleration is given by the equation;

\(Acceleration (a) = \frac{final \; velocity - initial \; velocity}{time}\)

Substituting into the equation;

\(a = \frac{55 - 10}{5}\)

\(a = \frac{45}{5}\)

Acceleration, a = 9.0 m/s²

Therefore, the average acceleration of the motorcycle is 9 meters per seconds square because it's experiencing a uniform velocity or motion.

A) The coefficient of kinetic friction between the block and surface is 0.385.

B) The decrease in kinetic energy of the bullet is 24.2 J.

C) The kinetic energy of the block the instant after the bullet passes through it is zero since it comes to rest.

a. To find the coefficient of kinetic friction between the block and surface, we first need to find the velocity of the block after the collision. We can use conservation of momentum to do this:

m_block * 0 + m_bullet * v_bulleti = (m_block + m_bullet) * v

where

m_block = 0.809 kg (mass of block)

m_bullet = 0.00408 kg (mass of bullet)

v_bulleti = 378 m/s (initial velocity of bullet)

v = final velocity of block and bullet after collision

Solving for v, we get:

v = m_bullet * v_bulleti / (m_block + m_bullet)

v = (0.00408 kg) * (378 m/s) / (0.809 kg + 0.00408 kg) = 1.54 m/s

Now we can use the work-energy theorem to find the coefficient of kinetic friction:

W_friction = ΔK

where

W_friction = force of kinetic friction * distance = μ_k * m_block * g * d

ΔK = change in kinetic energy of block

We know the distance the block slides (d = 0.454 m), and we can calculate the initial kinetic energy of the block:

K_i = 1/2 * m_block * v^2 = 1/2 * (0.809 kg) * (1.87 m/s)^2 = 1.9445 J

The final kinetic energy of the block is zero since it comes to rest, so ΔK = -K_i.

Substituting these values into the work-energy equation and solving for μ_k, we get:

μ_k = -ΔK / (m_block * g * d) = -(-1.9445 J) / ((0.809 kg) * (9.81 m/s^2) * (0.454 m)) = 0.385

Therefore, the coefficient of kinetic friction between the block and surface is 0.385.

b. The decrease in kinetic energy of the bullet is:

ΔK_bullet = 1/2 * m_bullet * (v_bulleti^2 - v_bulletf^2)

where

v_bulletf = 189 m/s (final velocity of bullet)

Substituting the given values, we get:

ΔK_bullet = 1/2 * (0.00408 kg) * ((378 m/s)^2 - (189 m/s)^2) = 24.2 J

Therefore, the decrease in kinetic energy of the bullet is 24.2 J.

c. The kinetic energy of the block the instant after the bullet passes through it is zero, since it comes to rest.

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Answer: The statement when the motion energy of an object changes, energy is being transferred is true.

Explanation:

Motion energy is also called mechanical energy and it is the summation of kinetic energy and potential energy stored in an object required for work.

As kinetic energy is the energy acquired due to motion of an object and potential energy is the energy acquired by an object due to its position.

For example, when a moving ball strikes another ball causing it to move then energy is being transferred from one ball to another.

Therefore, the statement when the motion energy of an object changes, energy is being transferred is true.