Which statement correctly describes one
characteristic of a sound wave?
(1) a sound wave can travel through a vacuum.
(2) a sound wave is a transverse wave.
(3) the amount of energy a sound wave
transmits is directly related to the wave’s
amplitude.
(4) the amount of energy a sound wave
transmits is inversely related to the wave’s
frequency.

You have been hired to design a spring-launched roller coaster thatwill carry two passengers per car. the car goes up a 10-m highhill, then descends 15m to the track's lowest point. you'vedetermined that the spring can be compressed a maximum o 2.0m andthat a loaded car will have a maximum mass of 400kg. for safetyreasons, the spring constant should be 10% larger than the minimumneeded for the car to just make it over the top. a) what spring constant (k) should you specify ? b) what is the maximum speed of a 350 kg car if the spring iscompressed the full amount.