Which one of the following aspects is an exclusive characteristic of living things? (A) Isolated metabolic reactions occur in vitro. (B) Increase in mass from inside only. (C) Perception of events happening in the environment and their memory. (D) Increase in mass by accumulation of material both on surface as well as internally

1. you serve a volleyball with a mass of 2.1 kg. the ball leaves your hand with a speed of 30 m/s. the ball has energy. calculate it. 2. a baby carriage is sitting at the top of a hill that is 21 m high. the carriage with the baby weighs 12 n. the carriage has energy. calculate it. 3. a car is traveling with a velocity of 40 m/s and has a mass of 1120 kg. the car has . calculate it.