Your cat weighs 4.5 kg. He is sitting on top of the refrigerator ready to pounce. His potential energy is 8.1 joules. How tall is the fridge (in meters)?

What is the ph of a solution that has a hydrogen ion concentration of 1.0 * 10 -9 m?

Which answer tells the reason the earth’s climate is getting warmer? too many animals are becoming extinct. large glaciers are melting in antarctica. the earth is moving closer to the sun. driving cars gives off gases that trap heat in the atmosphere.

Which of these describes how heat is transferred by convection* a. sunlight travels through space without the aid of fluids or solids. b. warm air rises and takes the heat with it, eventually, it cools and sinks c. air at the equator rises and sinks at the poles. d. air molecules touch the warm ground, heating them up *not conduction