Which statement is false? a. A closed system does not interact with its surroundings. b. Matter and energy can be transformed in and out of a system c. Energy can be created or destroyed. d. If energy appears to be gained or lost, it has just changed into a different form

Imagine that you push on a large rock. at what point does your effort change the rock’s mechanical energy?

Consider hydrogen in an excited state n = 5n=5 that emits photons to reach the ground state. there are various possible transitions other than straight to the ground state that can occur; for example, it can drop to the n = 3n=3 state followed by the n = 3n=3 to the ground state transition. which of the possible transitions will result in the emission of a photon in the visible region?

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.