We know the mechanical energy Ina system is 30 J, and we know the potential energy is 20J. What is the kinetic energy?

Calculate how long it eould take a car to travel 1600 m at an average speed of 26.4m/s

The kinetic molecular theory predicts that the pressure rises as the temperature of a gas increases because: a. the average kinetic energy of the gas molecules decreases. b. the gas molecules collide less frequently with the interior wall. c.

A force of 200 N is required to keep an object sliding at a constant speed of 2 m/s across a rough floor. How much power is being expended to maintain this motion?

When you observe a physical property the substance

Mr. White claims that he invented a heat engine with a maximum efficiency of 90%. He measured the temperature of the hot reservoir as 100o C and that of cold reservoir as 10o C. Find the error that he made and calculate the correct efficiency.

An object moves with velocity v (t) = t^2-8t+7 a) write a polynomial expression for the position of the particle at any time t greater or equal to zero.

Is a lack of thorns a mutation? (on a plant)

Why is the motion of an athlete moving along the circular path with Constant speed considered to be an accelerated motion?

What is a characteristic of atoms

A doctor uses an instrument (s) that emits light and allows the doctor to view the inside of a patient's intestine. What is the doctor most likely using? - a telescope, a microscope, laser beams, or fiber optics