Which of the following best describes alternating current? current that increases and decreases in temperature current that constantly turns on and off current in which charges change direction current that gains and loses electrons

How is the force of gravity mathematically related to the factors that answer question 1? 1. what three variable factors determine the force of gravity between any two objects

You are in a car driving 60 mph without a seat belt. The driver needs to slam on their breaks very hard. At that moment, you continue to move forward and hit the seat in front of you hurting your face.

How far does a car travel in 90 seconds if it is traveling at a speed of 55 m/s? What is the appropriate equation

A gust of wind blowing east pushes against a ball. When will the wind do work on the ball?

For a beam of light, the direction of polarization is defined as

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.

Which planet shows evidence of water erosion?

What do nuclear fission and nuclear fusion have in common?

When plug prongs are connected to the metal case of an appliance, a part that should always be placed next to the case is a a. flat metal washer. b. hexagonal aluminum shoulder. c. steel nut. d. mica washer.