Does time machine really exist?

A grocery shopper tosses a 9.0 kg bag of rice into a stationary 18.0 kg grocery cart. The bag hits the cart with a horizontal speed of 5.5 m/s toward the front of the cart. What is the final speed of the cart and bag

The specific heat capacity of ice is about 0.5 cal per gram per degree Celsius. Suppose it remains at that value all the way to absolute zero. Determine the quantity of heat needed to change a 1 g ice cube at absolute zero to 1 g of boiling water.

What does the 4 mean in the formula 4Na2SO3?

If the power developed in an electric circuit is doubled the energy used in one second is

How can you tell that this paragraph uses a quotation? Check all that apply?

A proton in a cyclotron is moving with a speed of 2.97*107 m/s in a circle of radius 0.568 m. 1.67 * 10-27 kg is the mass of the proton, and 1.60218 * 10-19 C is its fundamental charge.

If you set up an experiment with two different independent variables, then the results would be

Convert 88 mm to cm?

aluminum has a density of 2.70 gm/cm cubed. what is the mass of a peice of alluminum that has a volume of 100.00 cm cubed

List three fossil fuels. How do they differ from renewable energy sources?