A rock rolls down a steep hill. Its intial velocity is 1 meter per second. By the time it reaches the bottom of the hill 30 seconds later. Its velocity is 7 meters per second. What is the acceleration of the rock

When you lift a book of the ground to your desk, what kind of work do you do, negative or positive? by lifting the book what do you change? does the book gain or loose energy? what kind of energy?

Can someone explain what streamlining is in a simple way with an example.

When two forces act on an object in the same direction the resultant force is equal to

As altitude increases in the troposphere and stratosphere, the air temperature decreases in the troposphere and increases in the stratosphere decreases in both the troposphere and stratosphere increases in the troposphere and decreases in the

You are in a canyon and yell across. It takes 4 seconds for the echo to come back to you. How wide is the canyon?

What is the most advanced life form on earth

Which EM wave is about the size of humans?

Describe how the Catapult works?

Newton's third law of motion states that the force pair acting on different objects consist of two forces that

While working on her science fair project Venus connected a battery to a circuit that contained a light bulb. Venus decided to change the light bulb to a higher resistance, but she wanted to keep the current the same.