temperature near the surface of the earth is 298 K. A xenon atom (atomic mass = 131.29 u) has a kinetic energy equal to the average translational kinetic energy and is moving straight up. If the atom does not collide with any other atoms or molecules, then how high up would it go before coming to rest? Assume that the acceleration due to gravity is constant during the ascent.

A baseball of mass m= 0.35 kg is spun vertically on a massless string of length L = 0.93 m. The string can only support a tension of Tmax= 10.6 N before it will break. Randomized Variables m = 0.35 kg L = 0.93 m Tmax= 10.6 N Part (a) What is the maximum possible speed of the ball at the top of the loop, in meters per second? Part (b) What is the maximum possible speed of the ball at the bottom of the loop, in meters per second?

Explorers in the jungle find an ancient monument in the shape of a large isosceles triangle as shown. The monument is made from tens of thou- sands of small stone blocks of density = 800 kg/m3 . The monument is 15.7 m high and 64.8 m wide at its base and is everywhere 3.60 m thick from front to back. Before the monument was built many years ago, all the stone blocks lay on the ground. (a) Choosing a coordinate system with x = 0 at the center of the pyramid, y = 0 at the base of the pyramid, and z = 0 at the face of the pyramid shown in the diagram, determine the coordinates of the center of mass of the pyramid in the x, y, and z directions. (b) How much work did laborers do on the blocks to put them in position while building the entire monument? Note: The gravitational potential energy of an object–Earth system is given by Ug = MgyCM, where M is the total mass of the object and yCM is the elevation of its center of mass above the chosen reference level.

The collision frequency is inversely proportional to the mean free path, but is independent of the average speed of the particles. True False