What is the tme of a 575 kg roller coaster car that is at rest 50 m above the lowest point on the ride? the maximum possible speed of the roller coaster is 31.3 m/s.

Asubmarine has a "crush depth" (that is, the depth at which water pressure will crush the submarine) of 250 m. what is the approximate pressure (water plus atmospheric) at this depth? (recall that the density of seawater is 1025 kg/m3, g = 9.81 m/s2, and 1 kg/(ms2) = 1 pa = 9.8692 10-6 atm.) a. 34.8 atm b. 24.8 atm c. 25.8 atm d. 7.8 atm

Jackson is designing a new heater, and he wants to experiment with different thermally conductive materials. which of these materials would be useful in conducting heat?

For waves in the ocean, the medium of the waves is a. air b. water c. energy d. a passing boat