An engineer wants the power rating of a drill to be 800 Watts. How much time would it take if 268 J of work are being done?

Curious carl calculated the density of a cube to be 4.50 g/cm3. what is the density of the cube in g/l?

You are traveling in a car going at a constant speed of 100km/h down a long, straight highway. you pass another car going in the same direction which is traveling at a constant speed of 80km/h. as measured from your car's reference frame this other car is traveling at −20km/h. what is the acceleration of your car as measured from the other car's reference frame? what is the acceleration of the other car as measured from your car's reference frame?

Wavelength,frequency,and energy are related.what happens to a wave as it’s wavelength gets shorter?