Answer:
N₂= 697.24 m/s,
O₂= 652.38 m/s
CO₂= 393.35 m/s
Explanation:
The rms speed, of a gas is the following:
<em>where R: is the ideal gas constant, T: is the temperature and M: is the molar mass. </em>
<u>Knowing that the molar mass of the given gases are:</u>
N₂ = 14.0067 g/mol = 14.0067x10⁻³ kg/mol
O₂ = 15.999 g/mol = 15.999x10⁻³ kg/mol
CO₂ = 44.009 g/mol = 44.009x10⁻³ kg/mol
Also that T is 0 °C = 273 K, and R = 8.314 J/ K.mol = 8.314 kg.m². s⁻². K⁻¹. mol⁻¹. The rms speed of the gases are:
For N₂:
For O₂:
For CO₂:
Therefore, the rms speed of N₂ is 697.24 m/s, of O₂ is 652.38 m/s and of CO₂ is 393.35 m/s
I hope it helps you!
Answer:
The electric field inside the hollow plastic ball is zero.
Explanation:
According to Gauss's law, the electric field at the closed Gaussian surface is given by
Now, to find the electric field inside the hollow plastic ball, we choose a spherical Gaussian surface inside the ball. And since all of the charge lies on the surface of the ball, the Gaussian surface does not enclose any charge; therefore, the Gauss's law gives:
The electric field inside the hollow plastic ball is zero.
Heating up the brake pads of a car due to friction, is an example of conversion of work done against friction into thermal energy.
A moving car has kinetic energy. When the brakes are pressed, they exert friction against the rim of the wheel. The brake pads exert a force of friction on the wheels. The force of friction decelerates the car. As the car continues forward for a certain time based on its initial velocity, work is done against the frictional force. The kinetic energy possessed by the car is spent in doing the work against friction. This work done is converted into heat, which heats up the braking pads.
Thus, heating up the brake pads of a car is an example of conversion of its initial kinetic energy into thermal energy, by doing work against friction.