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Modern vacuum pumps make it easy to attain pressures of the order of in the laboratory. Consider a volume of air and treat the air as an ideal gas.
(a) At a pressure of and an ordinary temperature of 300.0 K, how many molecules are present in a volume of.
(b) How many molecules would be present at the same temperature but at 1.00 atm instead?
proof the following scenarion with sample calculationsan object of mass x on a pendular arm will reach the bottom of
A 4.9 kW heater is designed to beconnected to a 120 V rms source. What is the power dissipated bythe heater if it is instead connected to a 120 V dc source?
When released, the textbook slides on a horizontal tabletop with coefficient of kinetic friction k = 0.30. Use the work-energy theorem to find out how far the textbook moves from its initial position before coming to rest.
A 950-kg car traveling west at 15.0 m/s collides with a 750-kg car traveling north at 20.0 m/s. The cars stick together. What is the speed of the wreckage just after the collision
Light travels from air through a flat sheet of glass (n =1.5) into water. If the angle of incidence in air is 39°, what is the angle of the refracted ray in water
The sound level 23 m from a loudspeaker is 65 dB. What is the rate at which sound energy is produced by the loudspeaker
A 24.0V battery is in series with a switch, a 0.30Hinductor, and a 24? resistor. Find the potential differences across the inductor at t=3
A rope attached to a 19.0 kilogram wood sled pull the sled up a 18.0 degree snow-covered hill. A 5.00 kilogram wood box rides on top of the sled. compute at what value of the tension does the box slip
Two particles with the same charges are held a fixed distance apart. The charges are equal in magnitude and they exert a force on each other. What happens to the force exerted by one charge
A small block of mass 1.21 kg slides without friction on a horizontal table. Initially it moves in a circle of radius R0 = 0.62 m with a speed 1.8 m/s. What is the torque placed on the mass by the string
Suppose you want to observe neutron diffraction in a crystal with 0.24nm spacing between lattice planes. Find the kinetic energy of neutrons having wavelength equal to this spacing
Three 15 cm long rods form an equilateral triangle. Two of the rods are charged to + 13nC , compute the electric field strength at the center of the triangle
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