Which of the following are homogeneous solutions?

salt water

air

sand and water

vinegar

cement

Which atom is involved in giving your heart energy to beat? carbon gold oxygen iron

Displacement is which of the following types of quantities? A. vectorB. scalarC. magnitudeD. dimensional

Which material is ideal for an office door that allows light to pass through, but maintains privacy? A. clear glass B. wood C. frosted glass D. metal

The energy obtained by an object when it gains or loses electrons is what?

Which best describes why a liquid needs a container when a solid does not? Solids fill their containers, and liquids have definite shapes. Solids have definite shapes, and liquids fill their containers.

Are microwaves and radio waves faster or slower than other types of electromagnetic energy?

If you dive under-water, you notice an uncomfortable pressure on your eardrums due to the increased pressure. The human eardrum has an area of about 70 mm2 (7*10-5m2), and it can sustain a force of about 7 N without rupturing.

Why cant kinetic energy ever be greater than potential energy

For a stationary observer, when the source of a sound is moving, its pitch appears to change.

Give an example of each simple machine