Select the correct answer.
Which statement best explains that sound waves are pressure waves?
A.
Sound waves have regions of compressions and rarefactions.
B. Sound waves cannot propagate through metals.
C. Sound waves move perpendicular to the medium particles.
D. Sound waves cannot propagate through water.

The diagram shows a series of volcanic island and a hot spot determine the direction of movement of the tectonic plate that for the island

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.

If 50 ml of each of the liquids in the answer choices were poured into a 250 ml beaker, which layer would be directly above a small rubber ball with a density of 0.960 g/ml? a. sea water – density of 1.024 g/ml b. mineral oil – density of 0.910 g/ml c. distilled water – density of 1.0 g/ml d. petroleum oil – density of 0.820 g/ml