can some one help me

1) The unit for work is


2)Which of the following statements is MOST true?


A. 39.948 is the atomic number and we can't see the atomic mass.


B. 18 is the atomic mass and 39.948 is the atomic number.


C. 18 is the atomic mass and 39.948 is the atomic mass


3)When an object is moving, there is always a force pushing/pulling it in the direction

of its motion.

A. True

B. False


4)Rajaa pedals down a flat road on her bike. She stops pedaling and lets her bike

coast down the road. Eventually her bike stops if she doesn’t continue to pedal. If

energy is conserved, why doesn’t the kinetic energy stay constant and the bike

continue to move forever?


A. Friction causes some energy to be converted to matter.

B. Friction causes some energy to be converted to heat.