1. Kevin had a small blue crystal of unknown composition and a large green anhydrous crystal of known composition. He heated both crystals over a laboratory burner. The green crystal did not
give off steam nor did it change physical appearance. The blue crystal, when heated, gave off
water vapor and became a powder. What can you conclude about the blue crystal? Explain.

W= fd
where f is an applied force and d is the distance over which it is applied. when a parachuting skydiver is at constant velocity, he is experiencing "terminal velocity", the point at which his acceleration down is canceled out by air resistance. that means that the resisting force of the air is equal to his weight, but in the opposite direction. with this, we can solve for the work done by the force.
w = fd
w = (92.0)(9.81 m/s^2) (325)
w= 2.93 x 10^5 j
the value for work in this case is positive because it is pushing up on the skydiver, who has a downward force of gravity.
therefore the answer is 2.93 x 10^5 j

The capital letters and lowercase letters smoothly run together without lifting the pen