Read the following excerpt about water availability to living organisms.

“water covers 75 percent of earth. 97 percent of water on earth is salt water. only 3 percent of water is available as fresh water, but most of this water is locked up in solid glaciers and polar ice caps.”

based on this information, which is the best approximation of the amount of water on the planet that is available for animals to drink?
1 percent
3 percent
10 percent
75 percent

One hazard of space travel is debris left by previous missions. there are several thousand masses large enough to detect by radar orbiting the earth, but there are far greater numbers of very small masses such as flakes of paint. calculate the force exerted by a 0.110 mg chip of paint that strikes a space shuttle window at a relative speed of 5.00 ✕ 103 m/s and sticks, given the collision lasts 6.00 ✕ 10-8 s. such a collision chipped the window of the ill-fated challenger in june 1983, causing $50,000 of damage.