A student spreads modeling clay in a flat, rectangular tray. He presses small pebbles and nails into the clay and puts the tray in the freezer. In a similar tray, he pours wax and allows it to harden. After a while, he takes the clay out of the freezer and places it on top of the wax. When he applies pressure with his palm and drags the clay over the top of the wax, deep impressions are made. Which geologic process is the student trying to model?

Which of the following is not a part of the respiratory system? a. pharynx b. trachea c. pancreas d. larynx

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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.