Which of the following statements best describes the relationship between force and work?
a. work equals force divided by distance.
b. force and work are two terms for the same thing.
c. work is equal to certain forces, like gravity and friction.
d. work is done when a force moves an object over a distance.

Aray of light traveling parallel to the principal axis of a concave mirror will be reflected through the mirror's

Figure 9 on page 362 shows various motions of balls. the curved path followed by the yellow ball in b in picture b is result of a) inertia b) centripetal motion c) gravity and horizontal velocity d) linear motion

Adiver named jacques observes a bubble of air rising from the bottom of a lake (where the absolute pressure is 3.50 atm) to the surface (where the pressure is 1.00 atm). the temperature at the bottom is 4.00 ∘c, and the temperature at the surface is 23.0 ∘c. what is the ratio of the volume of the bubble as it reaches the surface (vs) to its volume at the bottom (vb)? if jaques were to hold his breath the air in his lungs would be kept at a constant temperature. would it be safe for jacques to hold his breath while ascending from the bottom of the lake to the surface?