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The total translational kinetic energy of the molecules of a sample of gas at 421 k is 3.95x10^4j.
How many moles does the sample comprise?
Find the average translational kinetic energy of a single molecule.
An 11g bullet is fired into an 11kg wood block that is at rest on the wood table. The block, with the bullet embedded, slides 5.11 across the table. The coefficient of kinetic friction for wood sliding on wood is 0.25.
Assume that a car can operates on either 100% gasoline or 100 % ethanol, with no discernable difference in performance. How far can the car travel along the same route on a full tank of ethanol
A 1.5 kg crate falls from a height of 2.0 m onto a spring scale where the spring constant is 1.5 ´ 105 N/m. when you calculate the gravitational potential energy
A hydrogen atom is in its second excited state, n=3. Find the total energy of the atom
A 68.0-kg person throws a 0.0500-kg snowball forward with a ground speed of 27.0 m/s. What are the velocities of the two people after the snowball is exchanged
At one instant a bicyclist is 49m due east of a park's flagpole, going due south with a speed of 14 m/s. Then 40s later, the cyclist is 49m due north of the flagpole, going due east with a speed of 14m/s. For the cyclist in this 40s interval, what..
Car A accelerates from 0 mph to 30 mph in 6 seconds. Car B accelerates from 0 mph to 35 mph in 6.5 seconds
The secondary voltage of an ignition trans- former in a furnace is 14 kV. When the primary operates at an rms voltage of 103 V, What is the impedance in the sencondary
A current I flows down a wire of radius a. If it is uniformly distributed over the surface, what is the surface current density K
A cyclist is pedaling at a cadence of 60, so the bicycle wheel make 60 rotations per minute around the axis through its center. What is the wheel's angular speed
A 7.80-g bullet moving at 640 m/s penetrates a tree trunk to a depth of 6.1 cm. find the average frictional force that stops the bullet
A rectangular block of ice 9.00 m on each side and 0.7 m thick floats in sea water. The density of the sea water is 1025kg/m3. The density of ice is 919kg/m3. How high does the top of the ice block float above the water level.
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