Tarzan starts his swing from a vine that makes an angle of θ = 50.0 with the vertical. The vine will break when its tension reaches 1000 N. If Tarzan’s mass is 90.0 kg, find the angle the vine makes with the vertical when it breaks.

How many molecules are present in 3 mols of silicon dioxide (sio2)?

Which is not a characteristic of a heat pump? a. it is used in air conditioners. b. it uses a refrigerant. c. it requires no work. d. it reverses the normal flow of thermal energy.

Examine the equation. 23490th→23088ra+42he what kind of barrier would you need to block the radioactive particles from this reaction? a.a piece of paper b.a sheet of aluminum foil c. a two-inch block of lead d. a solid concrete block