Read the list of substances

Air, Copper, Glass, Gold, Wood

which substances have highly electrical conductivity?

A) Air and Copper

B) Air and Glass

C) Copper and Glass

D) Copper and Gold

True Or False The positive terminal of a battery has a highter potential than it's negative terminal?

A spherical weather balloon is filled with hydrogen until its radius is 4.00 m. Its total mass including the instruments it carries is 24.0 kg. (a) Find the buoyant force acting on the balloon, assuming the density of air is 1.29 kg/m3.

What happens to the amplitude of a sound wave when energy transfer is increased? A As the transfer of energy is increased, the amplitude increases causing the sound to get louder.

A proton is released from rest at x=5 cm. what direction does it move?

A block of wood floats because its density is greater than the density of water. True False

What is an example of total internal reflection at work?

Explaining how momentum can cause motion an astronaut on a space walk floats a little too far away from the space station. without air to push against, he cannot paddle back. however, the astronaut is holding a hammer.

A one-piece cylinder has a core section protruding from the larger drum and is free to rotate around its central axis. A rope wrapped around the drum of radius 1.39 m exerts a force of 3.34 N to the right on the cylinder.

In which of the following situations or places would you want to reduce the force of friction? More than one answer A. Skiing down a hill during a race. B. Walking down a steep hill. C. Sitting in the bed of a pickup truck while it turns a corner. D.

What are five examples that illustrate a machine or a person doing work on another?