an athlete throws a javelin to a maximum distance of 80m. how long is it in air and what height it does rises? neglete the heihjt of athlete.(relate problem with projectile motion)

What tightening torque should be used for a hexagonal head screw (not split-bolt) on a 250 kcmil conductor?

A0.580-kg rock is tied to the end of a string and is swung in a circle with a radius of 0.500 meters. the velocity of the rock is 4.50 m/s. what is the centripetal force acting on the rock? 15.5 n 5.22 n 69.8 n 23.5 n

6–48 bananas are to be cooled from 24 to 138c at a rate of 215 kg/h by a refrigeration system. the power input to the refrigerator is 1.4 kw. determine the rate of cooling, in kj/ min, and the cop of the refrigerator. the specific heat of banana above freezing is 3.35 kj/kg·8c.