The flywheel of a steam engine runs with a constant angular velocity of 230 rev/min. When steam is shut off, the friction of the bearings and of the air stops the wheel in 1.8 h. (a)What is the constant angular acceleration, in revolutions per minute-squared, of the wheel during the slowdown

The first postulate of special relativity is that the laws of physics are the same for all observers in uniform motion relative to one another.

An example that illustrates this postulate is the observation of a moving train from two different reference frames. Suppose two people, A and B, are standing on a platform watching a train pass by. A is standing still relative to the platform, while B is moving with the train.

From A's perspective, the train is moving and B is moving along with it. From B's perspective, however, they are both standing still and it is the platform that is moving backward.

Now suppose that A and B both observe a ball being thrown from the back of the train to the front. According to the first postulate of special relativity, the laws of physics are the same for both observers. Therefore, A and B should agree on the speed of the ball, the time it takes to travel from the back to the front of the train, and the trajectory it follows.

This example illustrates that the laws of physics are the same for all observers in uniform motion, regardless of their relative speeds or positions. It is a fundamental principle of special relativity.

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The pressure of the butane gas sample at 120.0 mL can be determined by using the ideal gas law equation, PV = nRT, where P is the pressure, V is the volume, n is the number of moles, R is the gas constant, and T is the temperature.

To find the pressure of the butane gas sample at 120.0 mL, we need additional information such as the number of moles and the temperature of the gas. Once we have these values, we can use the ideal gas law equation, PV = nRT, to calculate the pressure.

1. Determine the values: Gather the known values for the problem, such as the volume (V = 120.0 mL) and any other given information, such as the number of moles (n) and the temperature (T).

2. Convert the volume: If necessary, convert the volume to the appropriate unit for the ideal gas law equation. The ideal gas law typically requires volume to be in liters, so if the given volume is in milliliters, divide it by 1000 to convert to liters.

3. Plug in the values: Substitute the known values into the ideal gas law equation, PV = nRT. Make sure to use consistent units for all the variables.

4. Solve for pressure: Rearrange the equation to solve for pressure (P). Divide both sides of the equation by the volume (V) to isolate pressure: P = (nRT) / V.

5. Calculate the pressure: Substitute the known values into the equation and perform the necessary calculations to find the pressure of the butane gas sample at 120.0 mL.

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Answer:

Kinetic energy decreases as you go up hill

Potential energy increases as you go up hill

The conversion factor between Torr and millimeters of mercury (mmHg) is 1 Torr = 1 mmHg. Therefore, 760 Torr is equal to 760 mmHg.

Torr and mmHg are two units of pressure that are often used interchangeably. Torr is named after the Italian physicist Evangelista Torricelli, who invented the mercury barometer in 1643.

It is defined as the pressure exerted by a column of mercury 1 millimeter high at a standard temperature. Meanwhile, mmHg stands for millimeters of mercury and is also a unit of pressure measurement based on the height of a column of mercury. It is often used in medical settings to measure blood pressure.

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Answer:

5.1 Ω

Explanation:

Basic Law   v = ir

     so   v/i = r = 61/12 = 5.1 Ω

The side length of the ice cube will be 0.49 m and 1.6072 feet. the volume of a cube is; V= a³

Density is defined as the mass per unit volume. It is an important parameter to understand the fluid and its properties. Its unit is kg/m³.

The mass and density relation is given as

mass = density × volume

Unit conversion;

1 g / cm³ = 1000 kg/m³

1 meter  =

3.28 feet.

The mass and density relation is given as

mass = density × volume

m=ρv

109 = 920 ××(V)

V=0.1184 cubic m

The volume of a cube is;

V= a³

0.1184 =  a³

a =0.49 m

a = 1.6072 feet

Hence, the side length of the ice cube will be 0.49 m and 1.6072 feet

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Answer:

Both transfers thermal energy from warm objects to cooler objects

Explanation:

Both transfer thermal energy from warm objects to cooler objects

Answer:

Sonic boom.

When something breaks the sound barrier. (Moves faster than sound, like lighting)

Explanation:

Try flying a plane.

The moment of inertia of the cylinder about the horizontal axis parallel and tangent to the cylinder is 3MR²/2.

The moment of inertia (Icm) of the cylinder about its symmetrical axis is calculated using the formula MR^2/2, where M represents the mass of the cylinder and R represents its radius.

To find the moment of inertia of the cylinder about the axis parallel and tangent to the cylinder, we can use the parallel axis theorem. According to the parallel axis theorem, the moment of inertia about an axis parallel to and at a distance 'd' from the axis passing through the center of mass is given by:

I = Icm + Md^2

In this case, the axis of rotation is parallel and tangent to the cylinder, so the distance 'd' from the axis passing through the center of mass is equal to the radius 'R'. Substituting the values into the equation:

I = Icm + MR^2

I = MR^2/2 + MR^2

I = (1/2 + 1)MR^2

I = (3/2)MR^2

Therefore, the moment of inertia of the cylinder about the given axis is (3/2)MR^2.

The correct answer is (D) 3MR^2/2.

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She should add diversity to her exercise program to keep her from getting bored or lazy.

Because if you are not having fun with it anymore then you stop doing it.Your weekly exercise running mileage should drop the week before the event. Your training now mostly focuses on "saving up" rest so that your legs are prepared for the marathon.

To keep your legs fresh throughout the week, fit in two to three quick runs with a few quick pick-ups—short, snappy portions that get your legs working faster and get you ready for the faster tempo of the race. Take a day off to completely rest two days before the marathon. Do a quick exercise(20-minute) run with up to five 45-second pick-ups the day before the race to tone your legs.

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The potential energy of an object diminishes while its kinetic energy rises. The increase in kinetic energy perfectly offsets the reduction in potential energy. The idea of work is another crucial one.

The mass of the object and the square of its velocity are directly related to its kinetic energy: K.E. = 1/2 m v2. When a mass is measured in kilograms and a speed is measured in meters per second, the kinetic energy is measured in kilogram-meters squared per second squared.

due to the rule of conservation of energy, which states that total energy is always constant. Kinetic energy will therefore rise, whereas potential energy will fall.

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Answer:

yesssssssssssssssssssssssssssssssssssss

The distance between two electrons must be 5.64 x 10⁻¹¹ meters for the electric force between them to be equal to the weight of an electron at the earth's surface.

To find this distance, we can use the equation for electric force between two charges:

F = kq₁q₂/r²

where F is the electric force, k is Coulomb's constant (8.99 x 10⁹ Nm²/C²), q₁ and q₂ are the charges of the two particles, and r is the distance between them.

We can set the electric force equal to the weight of an electron at the earth's surface (9.81 x 10⁻³¹ N) and solve for r:

9.81 x 10⁻³¹ N = (8.99 x 10⁹ Nm²/C²)(-1.6 x 10⁻¹⁹ C)²/r²

Rearranging and solving for r give us:

r = 5.64 x 10⁻¹¹ meters

Therefore, the distance between the two electrons must be 5.64 x 10⁻¹¹ meters for the electric force between them to be equal to the weight of an electron at the earth's surface.

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(a) The acceleration of the particle at time t = 5.1 is approximately 0.234.

(b) The values of t in the interval 0 ≤ t ≤ 2 for which the speed of the particle is 1 are approximately t = 0.559 and t = 1.890.

(a) The acceleration of a particle can be found by taking the derivative of its velocity function with respect to time. Given that v(t) = (t⁶ - 13t⁴ + 12) / (10t³ + 3), we can differentiate it to find a(t):

a(t) = d/dt [(t⁶ - 13t⁴ + 12) / (10t³ + 3)]

Using the quotient rule and simplifying the expression, we find:

a(t) = (3t²(7t⁶ - 56t⁴ + 12t + 36)) / (10t³ + 3)²

Substituting t = 5.1 into the expression, we get:

a(5.1) ≈ 0.234

Therefore, the acceleration of the particle at time t = 5.1 is approximately 0.234.

(b) The speed of a particle is given by the magnitude of its velocity, which is equal to |v(t)|. In this case, we want to find the values of t for which |v(t)| = 1.

To solve for these values, we set |v(t)| = 1 and solve the equation:

|(t⁶ - 13t⁴ + 12) / (10t³ + 3)| = 1

Simplifying the equation, we have two cases:

(t⁶ - 13t⁴ + 12) / (10t³ + 3) = 1

(t⁶ - 13t⁴ + 12) / (10t³ + 3) = -1

By solving these equations, we find the approximate values of t in the interval 0 ≤ t ≤ 2 for which the speed of the particle is 1:

t ≈ 0.559 and t ≈ 1.890

Therefore, these are the values of t in the interval 0 ≤ t ≤ 2 for which the speed of the particle is 1.

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Answer:

Select the crown at the bottom of an answer where the speech bubble icon is.

Explanation:

fall at a faster velocity than what it was thrown! Hope this helps!

Conduction is not an important process of energy transport inside the Sun. So the correct answer is option C.

The high temperature and density of the solar interior cause it to behave like a plasma, a state of matter in which electrons are stripped from atoms, resulting in a highly conductive fluid. Convection and radiation are the primary means by which energy is transported from the core of the Sun to its surface. Convection involves the transfer of heat through the motion of fluid, while radiation involves the transfer of energy through electromagnetic waves. The convective zone is the outermost layer of the solar interior, and it plays a crucial role in the transport of energy. Hence option C is correct.

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Answer:

Example

Write 81 900 000 000 000 in standard form: 81 900 000 000 000 = 8.19 × 1013

It’s 1013 because the decimal point has been moved 13 places to the left to get the number to be 8.19

Answer:

a = (Vf - Vi) / t = (10.9 - 27.7) / 2.37 = -16.8 / 2.37 = -7.09 m/s/s

negative means slowing down

Explanation:

When you increase the voltage of an electron beam, the radius of the beam will decrease. This is because the increased voltage causes the electrons in the beam to gain more energy, which increases their speed and therefore their momentum. As a result, the beam becomes more focused and the radius decreases.

On the other hand, when you increase the current of an electron beam, the radius of the beam will generally increase. This is because an increase in current means there are more electrons in the beam, which can lead to a more diffuse and spread-out beam. However, this effect can be mitigated by using magnetic fields to focus and shape the beam.

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Answer:

a = (v2 - v1) / t

For constant acceleration (positive) v2 (final velocity) must be greater than v1 (initial velocity)

Note that velocity is a vector quantity in this equation

For instance in the case of a freely falling body one might have v1 as 9.8 m/s and v2 as 29.4 m/s in 3 sec giving

a = (-29.4 - (-9.8)) / 3 = -19.6 m/s^2 where the positive direction was chosen as upwards and the acceleration is negative or downwards

Answer:

It depends on 2 factors

the nature of the materials

the normal force.

Explanation:

It depends on 2 factors

the nature of the materials that are in friction and the treatment that they have followed. This factor is expressed by a numerical value called the coefficient of friction or friction.

the force exerted by one body on the other, that is, the normal force.

When hydrogen and oxygen combine to form water, the term used to describe the water is a compound.

A compound is a substance made up of two or more different elements that are chemically bonded together. In the case of water, the two elements are hydrogen and oxygen, and they are bonded together through a covalent bond. This bond is formed when electrons are shared between the two elements, creating a stable molecule. Water is an essential compound for life on Earth, as it is required for a variety of biological processes and is a major component of many living organisms.

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Answer:

A . Electrons have been transferred into it.

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Tysm! Hope this helps!

Answer:

5 m/s^2

Explanation:

Acceleration is change in velocity  /  change in time

   Accel = 25 m/s  /  5 s = 5 m/s^2

Explanation:

70N-40N=30N