In a manufacturing plant, a quench hardening process is used to treat steel ball bearings (c = 500 j/kg-k, k = 60 w/m-k, rho = 7900 kg/m3) of 25 mm in diameter. after being heated to a prescribed temperature, the steel ball bearings are quenched. determine the rate of heat loss if the rate of temperature decrease at the ball bearing surface at a given instant during the quenching process is 50 k/s.

After a car's engine has been running for a while, if you stand near the car's engine you can often feel heat coming from the engine as a result of a. radiation b. convection c. conduction

Samir watches a 100-minute movie on his spaceship. maria's spaceshipe flies in the same direction as samir's spaceship but she observes his move to last 125 minutes and his spaceship to be 40 m long. how long does samir observe his own spaceship to be? according to an observer on earth, planet x is stationary. maria and samir depart earth on their spaceships at the same time, each flying at 0.5c. maria flies toward planet x and samir flies in the opposite direction. according to maria, her voyage to planet x takes 9 years. how many years does marias voyage take according to samir?

Why can blue light and yellow light combine to produce white light? question 17 options: they are both primary colors of light. they absorb each other's wavelengths. because blue, yellow, and white are primary colors. they are complementary colors of light.