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Anvisha [2.4K]
3 years ago
9

If both the pressure and volume of a given sample of an ideal gas are doubled, what happens to the temperature of the gas in Kel

vins? a)The temperature of the gas in increased by four times its original value. b)The temperature of the gas is reduced to one-half its original value. c)The temperature of the gas is reduced to one-fourth its original value. d) The temperature remains constant. e)The temperature of the gas is increased by two times its original value.
Physics
1 answer:
satela [25.4K]3 years ago
7 0

Answer:

a)The temperature of the gas in increased by four times its original value.

Explanation:

For a fixed amount of a gas, the ideal gas equation can be written as follows:

\frac{pV}{T}=const.

where

p is the gas pressure

V is the gas volume

T is the gas temperature (in Kelvins)

For a gas under transformation, the equation can also be rewritten as

\frac{p_1V_1}{T_1}=\frac{p_2V_2}{T_2}

where the labels 1,2 refer to the initial and final conditions of the gas.

In this problem, we have:

- The pressure of the gas is doubled: p_2 = 2p_1

- The volume of the gas is doubled: V_2=2V_1

Substituting into the equation, we find what happens to the temperature:

\frac{p_1V_1}{T_1}=\frac{(2 p_1)(2V_1)}{T_2}

\frac{1}{T_1}=\frac{4}{T_2}

T_2 = 4T_1

So, the correct choice is

a)The temperature of the gas in increased by four times its original value.

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Answer:

False

Explanation:

Actually, the converse is true. The mass number would be lower than the sum of the mass of the individual nucleons combined. According to Einstein’s equation of E=MC², this will be due to a phenomenon called mass defect. This ‘anomaly’ is due to the loss of some energy (now the nuclear binding energy) when the nucleons were brought in together to form the nucleus.

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3 years ago
Under the influence of its drive force, a snowmobile is moving at a constant velocity along a horizontal patch of snow. When the
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Answer:

a) Δx = 11.6 m

b) t = 3.9 s

Explanation:

a)

  • Since the snowmobile is moving at constant speed, and the drive force is 195 N, this means that thereis another force equal and opposite acting on it, according to Newton's 2nd Law, due to there is no acceleration present in the horizontal direction .
  • This force is just the force of kinetic friction, and is equal to -195 N (assuming the positive direction as the direction of the movement).
  • Once the drive force is shut off, the only force acting on the snowmobile remains the friction force.
  • According Newton's 2nd Law, this force is causing a negative acceleration (actually slowing down the snowmobile) that can be found as follows:

       a = \frac{F_{fr} }{m} = \frac{-195N}{128kg} = -1.5 m/s2 (1)

  • Assuming the friction force keeps constant, we can use the following kinematic equation in order to find the distance traveled under this acceleration before coming to an stop, as follows:

       v_{f} ^{2}  -v_{o} ^{2} = 2* a* \Delta x (2)

  • Taking into account that vf=0, replacing by the given (v₀) and a from (1), we can solve for Δx, as follows:

       \Delta x =- \frac{v_{o}^{2}}{2*a} =- \frac{(5.90m/s)^{2}}{2*(-1.5m/s2)} = 11.6 m (3)

b)

  • We can find the time needed to come to an stop, applying the definition of acceleration, as follows:

       v_{f} = v_{o} + a*\Delta t (4)

  • Since we have already said that the snowmobile comes to an stop, this means that vf = 0.
  • Replacing a and v₀ as we did in (3), we can solve for Δt as follows:

       \Delta t = \frac{-v_{o} }{a} = \frac{-5.9m/s}{-1.5m/s2} = 3.9 s   (5)

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2 years ago
The element in an incandescent light bulb that releases light energy is
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A thin tungsten filament
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2 years ago
Consider a skateboarder who starts from rest at the top of ramp that is inclined at an angle of 18.0 ∘ to the horizontal.
kotegsom [21]

Answer:

Explanation:

v= u + at

v is final velocity , u is initial velocity . a is acceleration and t is time

Initial velocity u = 0 . Putting the given values in the equation

v = 0 + g sin 18 x 3.5

= 10.6 m /s

3 0
3 years ago
A uniform electric field of magnitude 7.0 ✕ 104 N/C passes through the plane of a square sheet with sides 5.0 m long. Calculate
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Answer:

1.52*10^6 Nm^2/C

Explanation:

Given that:

Electrical field E = 7.0 * 10^{-4}N/C

square side l = 5.0 m

Area A = 5.0 * 5.0

= 25.0 m²

Angle ( θ ) between area vector and E = (90° - 60°)

= 30°

The flux \phi_E can now be determined by using the expression

\phi_E = E*A*Cos \theta

\phi_E = 7.0 * 10^{-4}N/C *25.0m*Cos 30^0

\phi_E = 1515544.457 Nm^2/C

\phi_E = 1.52*10^6 Nm^2/C

5 0
2 years ago
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