Suppose you go outside and look at three stars. star a is blue, star b is white, and star c is red. which star is the hottest and which star is the coldest?

The free body diagram shows a box being pulled to the left up a 25-degree incline. the magnitude of the normal force is

=force × distance a. work b. velocity c. pressure d. momentum

An important dimensionless parameter concerned with very high-speed flow is the mach number, defined as v/c, where v is the speed of the object such as an airplane or projectile, and c is the speed of sound in the fluid surrounding the object. for a projectile traveling at 1170 mph through air at 50 ˚f and standard atmospheric pressure, what is the value of the mach number?