Astudent hypothesized that lettuce seeds will not sprout unless they were exposed to darkness. the student planted 10 lettuce seeds under a layer of soil and scattered 10 lettuce seeds on top of the soil. the data collected are shown in the table below. one way to prove the value of the validity of these results could be

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.