Practice 1. A 6.0 m2 area of land contains 32 small
poplar trees. What is the population
density of poplar trees?

What are ways that ordinary people can to keep antibiotic resistance from getting worse?

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.

Do fish feel pain? and if they do what pain