What is the equation for finding the energy in an objects gravitational potential energy store

A car is moving towards a student at constant speed. The student notices that the sound the car makes gets louder and louder as the car approaches.

An electric current will always follow?

What is the thinnest film of a coating with n = 1.39 on glass (n=1.52) for which destructive interference of the red component (650 nm) of an incident white light beam in air can take place by reflection?

The Greeks noticed that some stars were larger and moved haphazardly. What were these stars?

You're an electrical engineer designing an alternator (the generator that charges a car's battery). Mechanical engineers specify a 10-cm-diameter rotating coil, and you determine that you can fit 250 turns in this coil.

A wire that has a resistance of 1Ω is to be built from an aluminum block of volume 1 cm3 . How long is the wire going to be?

What is the difference between exercise and fitness

What combines to form bonds in compounds? A. atoms of elementsB. moleculesC. types of mineralsD. valences

A __ is used to measure air pressure.

What happens to sound waves after they are received by our ears?