Questions from Modern Physics

Q: You have a bucket containing an unknown liquid. You also have

You have a bucket containing an unknown liquid. You also have a cube-shaped wooden block that you measure to be 8.0 cm on a side, but you don’t know the mass or density of the block....

Q: The Environmental Protection Agency is investigating an abandoned chemical plant. A

The Environmental Protection Agency is investigating an abandoned chemical plant. A large, closed cylindrical tank contains an unknown liquid. You must determine the liquid’s density...

Q: For the situation shown, the tissues in the elephant’s abdomen are

For the situation shown, the tissues in the elephant’s abdomen are at a gauge pressure of 150 mm Hg. This pressure corresponds to what distance below the surface of a lake? (a) 1.5 m; (b) 2.0 m; (c) 3...

Q: The maximum force the muscles of the diaphragm can exert is 24

The maximum force the muscles of the diaphragm can exert is 24,000 N. What maximum pressure difference can the diaphragm withstand? (a) 160 mm Hg; (b) 760 mm Hg; (c) 920 mm Hg; (d) 5000 mm Hg.

Q: How does the force the diaphragm experiences due to the difference in

How does the force the diaphragm experiences due to the difference in pressure between the lungs and abdomen depend on the abdomen’s distance below the water surface? The force (a) increases linearly...

Q: What is tension T2 in the rope behind him? (

What is tension T2 in the rope behind him? (a) 590 N; (b) 650 N; (c) 860 N; (d) 1100 N.

Q: A cargo ship travels from the Atlantic Ocean (salt water)

A cargo ship travels from the Atlantic Ocean (salt water) to Lake Ontario (freshwater) via the St. Lawrence River. The ship rides several centimeters lower in the water in Lake Ontario than it did in...

Q: If he leans slightly farther back (increasing the angle between his

If he leans slightly farther back (increasing the angle between his body and the vertical) but remains stationary in this new position, which of the following statements is true? Assume that the rope...

Q: The moment of inertia of the empty turntable is 1.5

The moment of inertia of the empty turntable is 1.5 kg m2. With a constant torque of 2.5 N.m, the turntable–person system takes 3.0 s to spin from rest to an angular speed of 1.0 rad/s. What is the pe...

Q: While the turntable is being accelerated, the person suddenly extends her

While the turntable is being accelerated, the person suddenly extends her legs. What happens to the turntable? (a) It suddenly speeds up; (b) it rotates with constant speed; (c) its acceleration decre...