What is rolling friction

Where would you find the least dense water? at 1,000 m in the Antarctic Ocean, at 200 m in the Arctic Ocean, at the surface of the Atlantic Ocean, below 1,000 m in the Pacific Ocean

Which best describes earth's magnetic field lines?

A thin spherical glass shell in air is filled with an unknown liquid. A horizontal parallel light beam is incident on the shell and it is observed that the light is brought to focus on the surface of the shell directly opposite of the incoming beam.

What does the coarse adjustment knob do on a microscope?

What is the potential difference across a 10 ohms resistor if the current in the resistor is a 3.0 A

Which statement best compares the accelerations of two objects in free fall? O The heavier object has a greater acceleration.

A series RCL circuit includes a resistance of 280, an inductive reactance of 508, and a capacitive reactance of 315. The current in the circuit is 0.312 A.

A ray in benzene has a critical angle of 41.8 deg when trying to enter air. What is the index of refraction for benzene?

An elevator has mass 600 kg, not including passengers. the elevator is designed to ascend, at constant speed, a vertical distance of 20.0 m (five floors) in 16.0 s, and it is driven by a motor that can provide up to 40 hp to the elevator.

When two objects collide and stick together, what will happen to their speed, assuming momentum is conserved? They will move at the same velocity as whichever object was fastest initially.