Determine the time required for a car to travel 1km along a road if the car starts from rest, reaches a maximum speed at some intermediate point, and then stops at the end of the road. The car can accelerate at 1.5 m/s2 and decelerate at 2 m/s2 . Express your answer using three significant figures and include the appropriate units.

When the magnetic domains in a material can be aligned, but eventually drift out of alignment, the material is

In which of the following is positive work done by a person on a suitcase

Engines for propeller-driven aircraft are limited in their maximum rotational speed by the fact that the tip speed of the propeller must not approach the speed of sound in air (mach i). taking 6 ft as a typical diameter for a propeller of a light airplane and 1100 fils as the speed of sound, find the upper limit on the rpm (revolutions per minute) of the propeller shaft.