Boron (B) has two isotopes, boron-10 and boron-11. The atomic weight of boron is the .
A) combined masses of boron-10 and boron-11
B) average number of neutrons in boron-10 and boron-11
C) weighted average of the masses of boron-10 and boron-11
D) mass of boron-10 minus the mass of boron-11

Which of the following will a bacterium produce when a human gene is added to its genome? question 4 options: human carbohydrates a protein made up of both human and bacterial properties the human protein coded for by the human gene human plasmids that can be isolated from the bacterium

Chloroplasts and bacteria are in size. a. similar b. at different ends of the size range c. exactly the same d. none of these

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.