The coefficient of linear expansion of steel is 12 * 10-6 K-1. What is the change in length of a 25-m steel bridge span when it undergoes a temperature change of 40 K from winter to Summer?

What are two things that the amount of gravitational force between two object depends on

When does a roller coaster have the most kinetic energy

Which statement below is NOT a similarity between DNA & RNA? Question 1 options: They both carry and process information in living organisms. They both produce proteins. They both carry genetic information. They are both nucleic acids.

6. The peak value of an AC sine wave is 120 V. What's the effective value (rounded) ? A. 65 V B. 85 V C. 200 V D. 140 V

What force is required to accelerate a block of mass 4 kg at 2m/s2 on a surface which has a frictional force of 2N.

What are the main activities involved in studying physics?

What is the energy that moves your arms and legs

A moving object can be in equilibrium. Explain.

If gravity puts a force of 3N an object, how much force would it put on an second object that was twice as heavy

Where did the asteroids in the asteroid belt come from?