If the cart has potential energy of 5,000 J and kinetic energy of 2,750 J. How much mechanical energy does the cart have?

How many nonradioactive elements can be found in smartphones?

An observation of the red shift of galaxies suggestst that the universe is a. expanding b. contracting c. reversing d. stagnant

Counting your pulse can be most accurately performed by applying light pressure to an artery that is close to the surface of the skin. True or false?

Compare the energy consumption of two commonly used items in the household. Calculate the energy used by a 1.40 kW toaster oven, Wtoaster, which is used for 5.40 minutes, and then calculate the amount of energy that an 11.

A m = 500 kg sack of coal falls vertically onto a m = 2000 kg railroad flatcar which was initially moving horizontally at 3 m/s. no external forces, including friction, act on the flatcar.

Because the moon rotates once for each revolution around Earth, Choose one answer. a. you see some phases more than others. b. a different side of the moon faces Earth each day. c. you never see the far side of the moon.

Planet A takes 1 year to go around its star at an average of 1 A. U. distance. Planet B is 4 A. U. from the star. Calculate how long Planet B takes to orbit.

Average mass of a toy car (small, hot wheels) ?

A pwc capsizes. what is the best way to roll the pwc to turn it upright?

Which biome has the most extreme conditions