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A sealed container of volume 0.10 m^3 holds a sample of 3.0 x 10^24 atoms of helium gas in equilibrium. The distribution of speeds of the helium atoms shows a peak at 1100 m s^-1
(i) Calculate the temperature and pressure of the helium gas.
(ii) What is the average kinetic energy of the helium atoms?
A 42 kg pole vaulter running at 11 m/s vaults over the bar. Her speed while she is above the bar is 0.7 m/s. Avoid air resistance, as well as any energy absorbed by pole, and determine her altitude as she crosses the bar.
Timberland’s incremental tax rate is 30%. Prepare a budgeted income statement assuming that Timberland sells 2,500 tons. Illustrate what is the contribution margin per ton?
What friction torque is necessary to reduce its angular speed from 90.0 {rm rpm} to 45.0 {rm rpm} in a time interval of 32.0 {rm s}.
A 10-cm-diameter cylinder of helium gas is 20 cm long and at 20°C. The pressure gauge reads 120 psi. how many helium atoms are in the cylinder? what is the mass of the helium?
A ball is thrown with an initial velocity of 14m/s. using the approximate value g=10 m/s^2, at what time does the ball reach its high point?
Spheres A and B are touched together and then separated. Sphere C is then touched to sphere A and separated from it. Lastly, sphere C is touched to sphere B and separated from it. Explain how much charge ends up on sphere C?
In heavy rush-hour traffic you drive in a straight line at 12 m/s for 1.5 minutes, then you have to stop for 3.5 minutes, and finally you drive at 15 m/s for another 2.5 minutes. compute the average velocity between t=0 and t=7.5 minutes.
A piano is brought upstairs by two workers. Due to a mistake by one of the workers, the piano rolls down the stairs and finally comes to rest by the outside door.
The volume control on a surround-sound amplifier is adjusted so the sound intensity level at the listening position increases from 21 to 59 dB. What is the ratio of the final sound intensity to the original sound intensity?
Two 4.0 cm -diameter disks face each other, 1.5 mm apart. They are charged to +/- 13 nC. 1) What is the electric field strength between the disks?
The horizontal component Fx is shown by the histogram below as function of position along x-axis. There is also a kinetic frictional force of 0.50 N between mass and surface.
find out the z-component of the block's momentum after the kick.
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