Rey lifts a 6,300 g metal ball from the ground to a height of 0.98 m close to his body. (a.) What is the ball's PE? Realizing the ball is heavy, he suddenly releases it with a push at a speed of 15 m/s. (b.) What is the ball's KE?

Answer:

The wavelength in vacuum is equal to 428.8 nm.

Explanation:

Given that,

The wavelength of light, \(\lambda=284\ nm\)

The refractive index of glass, n = 1.51

We need to find the wavelength in vacuum. The relation between wavelength and refractive index is given by :

\(n=\dfrac{\lambda_v}{\lambda}\\\\\lambda_v=n\times \lambda\\\\\lambda_v=1.51\times 284\\\\\lambda_v=428.8\ nm\)

So, the wavelength in vacuum is equal to 428.8 nm.

Answer:

  about 3.17647 hours

Explanation:

The appropriate relation is ...

  time = distance/speed

  time = (270 km)/(85 km/h) = 3 3/17 h ≈ 3.17647 h

It will take Derek about 3.17647 hours to drive the distance.

Speed of bob:

so:

\(\\ \bull\tt\dashrightarrow 5.34\times 10^3\)

\(\\ \bull\tt\dashrightarrow 534\times 10^{-2}\times 10^3\)

\(\\ \bull\tt\dashrightarrow 534\times 10^{-2+3}\)

\(\\ \bull\tt\dashrightarrow 534\times 10^1\)

\(\\ \bull\tt\dashrightarrow 534\times 10\)

\(\\ \bull\tt\dashrightarrow 5340\)

Answer:

Correct Answer: B. Beaker A will be 72 °C and beaker B will be 28 °C.

This one is actually right!

The distance travelled by the vehicle around the circular track is 1,052.4 m.

The distance travelled by the vehicle in one complete cycle is calculated by using the following equation as show below.

d = 2πr

d = πd

Where;

In one complete cycle, the  vehicle will travel the circular track only once.

d = π(335 m)

d = 1,052.4 m

Thus, the distance travelled by the vehicle around the circular track is a function of the diameter of the circular track.

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The complete question is below:

A vehicle, starting from rest, accelerates on a circular track with a 335m diameter. What is the distance travelled by the vehicle when it makes one complete cycle?

(1) The instantaneous velocities are 4.2 km/h south and 4.1 km/h west

(2) The average velocity of Joe is 5.9 km/h southwest.

The instantaneous velocities are the velocities of Joe at any given time period and it is calculated as follows;

v (1 ) = 4.2 km/h south

v ( 2 ) = 4.1 km/h west

The average velocity of Joe is calculated from the ratio of the total displacement to total time of motion.

v (avg) = ( total displacement ) / ( total time of motion )

v (avg) = 5.9 km/h southwest

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Answer:an inspirational statement of an idealistic emotional future

Explanation:

I don't know if it's right tho

Answer:

The document that state tge currentand future objectives of an organization.

Answer:

Approximately \(2.11\; \rm m\cdot s^{-2}\) (assuming that \(g = 9.81\; \rm m\cdot s^{-2}\), the floor is horizontal, and that the external force is applied horizontally.)

Explanation:

The mass of this couch is \(m = 100\; \rm kg\). Calculate the weight of the couch:

\(W = m \cdot g = 100\; \rm kg \times 9.81\; \rm m \cdot s^{-2} = 981\; \rm N\).

Assume that the floor is horizontal. The magnitude of the normal force between the floor and the couch would be equal to the size of the weight of this couch.

Therefore, the normal force between the floor and the couch would be \(N = 981\; \rm N\).

The first step is to find out whether the couch would move at all.

The question has provided two constants of friction: \(\mu_\text{s}\) (coefficient of static friction) and \(\mu_\text{k}\) (coefficient of kinetic friction.)

The coefficient of static friction applies when the couch is stationary relative to the floor: \(f_\text{s} = \mu_\text{s} \cdot N = 0.40\times 981\; \rm N \approx 313.92\; \rm N\). In other words, while the couch isn't moving, the maximum (horizontal) external force that friction could resist would be \(f_\text{s} = 313.92\; \rm N\).

Assume that the external force in this question is horizontal. The size of the external force (\(525\; \rm N\)) exceeds that of \(f_\text{s}\). Hence, the couch would start to move after the \(525\; \rm N\!\) external force is applied.

Once the couch starts to move, the coefficient of static friction would no longer be relevant. Instead, the coefficient of kinetic friction (\(\mu_\text{k}\)) would give size of the friction between the floor and the couch. The size of that friction would be \(f_\text{k} = \mu_\text{k} \cdot N = 0.32\times 981\; \rm N \approx 313.92\; \rm N\).

This friction would counteract the horizontal external force on the couch. Hence, the net force on the couch in the horizontal direction would be:

\(\begin{aligned}& F(\text{external}) - f_\text{k} \\ &\approx 525\; \rm N - 313.92\; \rm N \\ &\approx 211.08\; \rm N \end{aligned}\).

Apply Newton's Second Law of motion to find the acceleration of the couch:

\(\begin{aligned}a &= \frac{(\text{Net Force})}{m} \\ & \approx \frac{211.08\; \rm N}{100\; \rm kg} \approx 2.11\; \rm m \cdot s^{-2}\end{aligned}\).

The magnitude of the magnetic field at the point of the proton moving in the negative direction is equal to  18.39 × 10⁻¹⁵ T.

The magnetic force direction that is experienced by the proton moving in the negative direction is equal to  4.71 x 10⁻²⁸ N.

The magnitude of the magnetic field at distance 'r' at the point of the proton moving in the negative direction is determined as follows;

F = qvB = (kq²)/r²

qvB = kq²/r²

B = kq/vr²

where, k is the coulomb's constant, r is the distance between the protons, q is the magnitude of the charge of the protons, and v is the speed of the proton.

Given the charge n the proton, q = 1.602 x 10⁻¹⁹C

The speed of the proton, v = 1.6 x 10⁵ m/s

B = (9 x 10⁹ x 1.602 x 10⁻¹⁹) / (1.6 x 10⁵ m/s x 0.7 x 0.7)

B = 18.39 × 10⁻¹⁵ T

The magnetic force experienced by the proton in the negative direction is calculated as follows;

F = qvB

F = 1.602 x 10⁻¹⁹ x 1.6 x  10⁵ x 18.39 × 10⁻¹⁵ T

F = 47.1 x 10⁻²⁹ N

F = 4.71 x 10⁻²⁸ N

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The final image is formed 2.63 cm to the right of the converging lens, with the same height as the object (1.00 cm).

To solve this problem, we can use the thin lens equation and the lens-maker's equation. We will assume that the final image is formed on the same side of the diverging lens as the object.

Using the thin lens equation for the converging lens, we have:

1/f = 1/d_o + 1/d_i

where f is the focal length of the converging lens, d_o is the object distance, and d_i is the image distance.

Substituting the given values, we get:

1/8.05 = 1/3.30 + 1/d_i

Solving for d_i, we get:

d_i = 2.63 cm

This means that the converging lens forms a real image of the object 2.63 cm to the right of it.

Using the lens-maker's equation for the diverging lens, we have:

1/f = (n - 1) * (1/r_1 - 1/r_2)

where f is the focal length of the diverging lens, n is the index of refraction of the lens material (assumed to be air), r_1 is the radius of curvature of the left surface of the lens (negative because it is a diverging lens), and r_2 is the radius of curvature of the right surface of the lens.

Since the diverging lens has only one curved surface, we can set r_1 to infinity (i.e., a flat surface) and simplify the equation to:

1/f = -(n - 1)/r_2

Substituting the given values, we get:

1/-16.00 = -(1 - 1)/r_2

Solving for r_2, we get:

r_2 = -∞

This means that the right surface of the diverging lens is a flat surface, and the lens has no effect on the image formed by the converging lens

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Before they begin to fall, the potential energy of the roadrunner and the coyote is the same regardless of their mass. Both the roadrunner and the coyote have zero kinetic energy just before they begin to fall.

The energy an individual or an object has as a result of motion—in this case, the motion of the falling apple—is known as kinetic energy. Potential energy, which exists in a bike that is parked on top of a hill, is converted to kinetic energy when you start riding it downhill.

By virtue of energy conservation, kinetic energy (KE) must be equal to the change in potential energy (qV), or vice versa. The voltage between the plates and the electron's energy are numerically equivalent in electron-volts. A 5000-V potential difference, for instance, results in 5000-eV electrons.

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The work done on 85 N boxes of books while carried horizontally 4m across a room is equal to zero. Therefore, option (C) is correct.

Work can be demonstrated as the energy used when a force is exerted to move an object through a definite displacement. The work done defines both the exerted force on the object and the distance moved by the object.

The applied force moves an object in a straight line in the direction of the exerted force over a displacement 'd'.

W= F × d

Where 'F' is the exerted force and 'd' is the displacement and W is work done.

Given, the weight of the box = 80 N

The displacement , d = 4 m

In order for to work to be done the box should move in the direction of exerted force as the books are moving forward direction and the applied force in an upward direction to carry the box.

Therefore, the distance moved in the direction of force is zero so the work done is also equal to zero.

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The bulbs connected in series will be dimmer.

When there is a connection in series, it implies that the connection is done in an end to end fashion. When the connection is in parallel the it is made in such a way that the bulbs are joined to a common junctions the same potential difference occurs across then all.

Now we know that in a series connection, the voltage across the different bulbs varies hence there is a potential drop which accounts for the decrease in the brightness of the bulb. On the other hand, the voltage across a parallel connection is the same thus the bulbs do not dim so much.

Hence, if 3 bulbs are in series and the same 3 bulbs are in parallel with the same battery, the bulbs connected in series will be dimmer.

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Answer:

Explanation:

vapour pressure at 70⁰F = .36 psi

pressure of 6.5 inch water column

6.5 inch = 6.5 x 2.54 cm =.165 m

pressure = .165 x 10³ x 9.8 = 1617 Pa

= 1617 x .000145 psi

= .23 psi

28.35 inch = 28.35 x 2.54 cm = .72 m

pressure = .72 x 13.6 x 10³ x 9.8

= 95961.6 Pa

= 95961.6 x .000145 psi

= 13.91 psi

a ) Barometric pressure at  70⁰F

=  pressure due to mercury column of 28.35 inch + water column of 6.5 inch + vapour pressure at 70⁰F

= 13.91 + .23 + .36 psi

= 14.5 psi

b )

If pressure is measured at 85⁰F

vapour pressure will be increased and pressure of dry gas will also be increased . This pressure will force down the column of mercury . So column of mercury will go down .

Answer:

Explanation:

Sure, I'd be happy to help you with the question!

Let's denote the input as x. According to the function machine, the input is multiplied by 6 and then 80 is subtracted from the result to obtain the output.

So, the function can be written as:

Output = (6 * x) - 80

Now, the problem states that the input is the same as the output. Therefore, we can set up the equation:

x = (6 * x) - 80

Let's solve this equation to find the value of x:

x = 6x - 80

Subtracting 6x from both sides, we get:

x - 6x = -80

Combining like terms, we have:

-5x = -80

Dividing both sides by -5, we find:

x = (-80) / (-5)

Simplifying the expression, we have:

x = 16

Therefore, the input (x) that results in the input being the same as the output is 16.

To work out these types of questions, it's important to carefully read the instructions and understand the operations being performed in the function machine. Then, you can set up an equation with the input and output, and solve for the unknown value. Always double-check your solution to ensure it satisfies the given conditions of the problem.

Answer:

16

Explanation:

(x*6) - 80 = x

Multiply the parentheses

6x - 80 = x
Add 80 to each side to get
6x = x + 80
Subtract x from both sides to get
5x = 80
Divide both sides by 5
x = 16

The average acceleration of the motorcycle over the given distance is approximately 9.39 m/s².

To calculate the average acceleration of the motorcycle, we can use the formula:

Average acceleration = (final velocity - initial velocity) / time

First, let's convert the final velocity from km/h to m/s since the distance is given in meters. We know that 1 km/h is equal to 0.2778 m/s.

Converting the final velocity:

Final velocity = 78 km/h * 0.2778 m/s = 21.67 m/s

Since the motorcycle starts from rest (initial velocity is zero), the formula becomes:

Average acceleration = (21.67 m/s - 0 m/s) / time

To find the time taken to reach this velocity, we need to use the formula for average speed:

Average speed = total distance/time

Rearranging the formula:

time = total distance / average speed

Plugging in the values:

time = 50 m / 21.67 m/s ≈ 2.31 seconds

Now we can calculate the average acceleration:

Average acceleration = (21.67 m/s - 0 m/s) / 2.31 s ≈ 9.39 m/s²

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The solubility of a substance in a solvent is affected by many factors, including temperature. In general, increasing the temperature of a solvent increases the solubility of a solute in that solvent. This relationship is known as the temperature-solubility relationship.

There are a few different ways in which temperature can affect solubility, depending on the specific solute and solvent in question. For example:

For most solid solutes in liquid solvents, increasing the temperature of the solvent will increase the solubility of the solute. This is because increasing the temperature generally increases the kinetic energy of the solvent molecules, which in turn makes it easier for them to break apart the intermolecular forces holding the solute together and form new solute-solvent interactions.

In some cases, however, the opposite may be true: the solubility of a solute in a solvent may decrease with increasing temperature. This is often observed for gases dissolved in liquids, where increasing the temperature decreases the solubility of the gas. This is because increasing the temperature of the liquid also increases the kinetic energy of the gas molecules, making them more likely to escape from the liquid and form a gas phase.

In rare cases, the temperature-solubility relationship may be more complex and exhibit unusual behavior. For example, for some solutes, the solubility may initially increase with temperature but then decrease at higher temperatures.

Overall, the relationship between temperature and solubility is an important consideration in many chemical processes, including crystallization, precipitation, and dissolution. Understanding this relationship can help scientists and engineers optimize their processes and achieve their desired outcomes.

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Answer:

True they can influence you and have an effect on your mental and emotional health.

Explanation:

Have you ever played Farckel.

Answer:

10.77 m

Explanation:

From the question given above, the following data were obtained:

Initial velocity (u) = 32 m/s

Angle of projection (θ) = 27°

Acceleration due to gravity (g) = 9.8 m/s²

Apogee i.e maximum height (H) =?

Thus, the apogee i.e the maximum height of the pumpkin can be obtained as follow:

H = u² Sine² θ /2g

H = 32² × (Sine 27)² / 2 × 9.8

H = 1024 × (0.454)² / 19.6

H = (1024 × 0.206116) / 19.6

H = 10.77 m

Thus, the apogee i.e the maximum height of the pumpkin is 10.77 m.

Answer:

a = -4/5 m/s^2

Explanation:

Acceleration = change in velocity / time

change in velocity = final velocity - initial velocity

a = (20 m/s - 60 m/s) / 50 s

a = -40 m/s / 50 s

a = -4/5 m/s^2

hope this helps! <3

Answer:

- 4/5 m/s^2

Explanation:

It is going from 60 to 20 m/s   so ACCELERATION is negative

   acceleration = change in velocity / time

                          = -40 m/s / 50 s =  - 4/5 m/s^2

The correct statement is " Sunlight absorbed at the surface results in greenhouse gases warming the atmosphere." The correct option is B.

The greenhouse effect is a natural phenomenon that keeps the Earth's temperature within a range that is suitable for humans and other forms of life. The greenhouse effect is maintained by certain gases in the atmosphere, known as greenhouse gases, which trap the sun's energy and warm the Earth's surface.

Option A, which states that human activities absorb sunlight to create stable warm temperatures on Earth, is not correct. Human activities do not directly absorb sunlight. However, they do release greenhouse gases, which contribute to the greenhouse effect and increase the temperature of the Earth's surface.

Option C, which states that greenhouse gases produced from human activities heat the surface temperatures of Earth, is partially correct. Human activities, such as burning fossil fuels, do release greenhouse gases that contribute to the greenhouse effect. However, this option suggests that the greenhouse gases themselves heat the surface of the Earth, which is not accurate. The greenhouse gases trap heat in the atmosphere, which warms the Earth's surface.

Option D, which states that sunlight is reflected by the surface of the Earth, and heat is trapped in the atmosphere by greenhouse gases, is not entirely accurate. The Earth's surface absorbs the sun's energy, and some of this energy is reflected back into space. The rest is absorbed by the Earth's surface and then re-emitted as heat. The greenhouse gases in the atmosphere trap this heat and prevent it from escaping into space, which causes the Earth's temperature to rise.

Therefore, The correct answer is option B.

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Answer:

The answer is in the attachment

Explanation:

!!PLEASE PLEASE PLEASE PLEASE PLEASE MARK ME THE BRAINLIEST!!

Answer:

my friend give options .............

a) Time period is given by 0.751 b) Displacement is  0.0751 nm c) The wavelength of the electromagnetic radio waves emitted is  225.56 m

T = 1/f

T = 1/(1330*10^3 Hz)

T = 751.88 ns

Time period T = 0.751 us

b) displacement is given by:

x = velocity * Time

x = 100*10^-6 m/sec*0.751*10^-6 sec

x = 0.0751 nm

c) lambda = c/f

lambda = 3*10^8/(1330*10^3 Hz)

lambda = 225.56 m

Displacement, commonly known as length or distance and denoted by the letters d or s, is a one-dimensional variable that represents the separation between two defined points. In the International System of Units (SI), the meter is the common unit of displacement (m). Transferring unfavorable emotions from one thing or person to another is referred to as displacement and is a defensive tactic. To "take out" their rage on a family member, for instance, a person can yell at them if they are upset with their job. Replace, supersede, and supplant are some frequent alternatives to the word "displace."

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