A student goes to the beach on a very hot day. She steps on the sand and jumps because it is so hot. What type of heat transfer is this?

A) Conduction

B) Convection

C) radiation

D Transmission

Newton believed he knew the physical cause of gravity. True or False?

Which of the following is an example of work being done on an object? A-Water in a pot changes into steam. B-A man pushes a couch across the room. C-A prism scatters ultraviolet light into visible light. D-A box rests on the floor.

How does the mass of an object change when it acquires a positive charge?

The change of state from a gas to a liquid?

2. What other physical quantity might be more important to weightlifters than how much actual work they do?

A sound from a source has an intensity of 270 db when it is 1 m from the source. what is the intensity of the sound when it is 3 m from the source?

What experimental term is it when a ruler is dropped to the floor?

Where is most of the energy from incoming waves focused? A. spit B. headland C. underwater D. barrier beach

Exoplanets (planets outside our solar system) are an active area of modern research. Suppose you read an article stating that there is a newly discovered planetary system with three planets.

A car with a mass 1200 kg accelerates at 1.89 m/s2. What is the total force exerted by the car on the road (answer in N to two decimal places) ?