Question

1. What device uses electricity to move heat from a cold region to a hot region?
a. Heat engine
b. heat pump
c. heat sink
d. steam engine
2. Which of the following is true about work?
a. Work is done on a glass of water that was raised from the floor to the table
b. When energy is fed into a machine, it transforms all of its energy into useful work
C. Heat cannot be use to drive machines to do work because it is not a form of energy
d. When a work is done on an object, it moves to an opposite direction as the applied force.​

Answer 1

Answer:

Nitrogen fixation in legume nodules occurs within the bacteria inside ... be emphasized that what is known is mainly from studies of the important ... (a) Clusters of nodules on bean (Phaseolus vulgaris) roots.

Explanation:

cнαнє jıтηα тυм cнαнσgє ρя ηα ααyєηgє