Asealed cylinder contains a sample of ideal gas at a pressure of 2.0 atm. the rms speed of the molecules is v0. if the rms speed is then reduced to 0.90 v0, what is the pressure of the gas?

The pressure of the gas is 1.8 atm.

Explanation:

Given that,

Pressure of ideal gas= 2.0 atm

rms speed of the molecule = v₀

Reduced rms speed = 0.90 v₀

We know the formula of rms speed of the ideal gas

From this formula rms speed is directly proportional to square root is pressure.

We need to calculate the pressure of the gas

Using formula of rms speed

Put the value into the formula

Hence, The pressure of the gas is 1.8 atm.

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note: the given question is incomplete.

complete question is given below.

which is an example of kinetic energy?

a. the energy stored in ethanol  

b. a hockey puck sliding across the ice  

c. a compressed spring  

d. a ball sitting at the top of a ramp

solution: the kinetic energy is the energy posses by the virtue of the motion of the object.

in the given options, a, c and d are the example of potential energy because it is the energy posses by the virtue of the rest of the object. but option b has the kinetic energy as the object is in motion.

hence, a hockey puck sliding across the ice   is the apex example of kinetic energy.

so, the option (b) a hockey puck sliding across the ice   is the correct option.