How much heat is needed to melt 2.5 kg of lead? the latent heat of fusion for lead is 5.85 kcal/kg. the latent heat of vaporization of lead is 20.8 kcal/kg

At 20∘c, the hole in an aluminum ring is 2.800 cm in diameter. you need to slip this ring over a steel shaft that has a room-temperature diameter of 2.804 cm . 1. to what common temperature should the ring and the shaft be heated so that the ring will just fit onto the shaft? coefficients of linear thermal expansion of steel and aluminum are 12×10−6 k−1 and23×10−6 k−1 respectively.

Petroleum contains energy. a. light b. kinetic c. chemical d. mechanical

Auniform solid cylinder with a radius of 10 cm and a mass of 3.0 kg is rotating about its center with an angular speed of 33.4 rpm. what is its kinetic energy?