Explain why the friction force between two surfaces increases if the force is pushing the surfaces together increases.

The critical angle between a medium and air is 430. What is the speed of light in that medium?

A test pilot flies with an acceleration of of 5 g. what is the acceleration in meter per second

A major process by which the Sun's energy is transported around the Earth system?

How does adjusting the slider and changing the stiffness or spring of the trampoline affect the way energy is stored?

The transfer of energy carried in rays is called convection true or false

How do we use light in space?

What units are used for gravitational potential energy? Write the name, not the symbol.

A 7.5 kg block is placed on a table. If it's bottom surface area is 0.6m2, how much pressure does the block exert on the tabletop? A. 376.5 Pa B. 73.5 Pa C. 226.5 Pa D. 122.5 Pa

A boulder of mass 2000 kg is at the top of a cliff of height 220 m. Determine how fast the boulder will be moving when it strikes the dirt below.

Which of the following statements are true? Check all that apply. O A positive charge and a negative charge attract each other. O Electric charge is conserved. O Two positive charges attract each other. O A neutral object contains no charge.