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.

Abike rider starts from rest and accelerates 28.0 meters down a slope in 5.00 seconds. what is her acceleration? select one: a. 3.21 m/sec2 b. 1.75 m/sec2 c. 9.80 m/sec2 d. 2.24 m/sec2

This is important 1. what happens to the speed of molecules in water vapor when it condenses to form a liquid? (2 points) the molecules slow down. the molecules speed up. the molecules slow down and then speed up. the molecules speed up and then slow down. 2. how might human activities change to compensate for a decrease in water supplies? (2 points) humans might build a factory. humans might build drainage systems. humans might extract more water from the ground. human behavior does not change because of the water cycle. i'll be grateful if anyone can answer these 2 questions !

Acertain radio station broadcasts radio waves that have a wavelength of 298cm what is its broadcast frequency?