The diameter of a brass ring at 30 °C is 50.0 cm. To what temperature must this ring be heated to increase its diameter to 50.29 cm? [ linear expansivity of brass = 1.9 x 10\(^{-5}\) K\(^{-1}\)]

Which of the following concepts is a method of heat transfer that does not require a material medium?

Which of the folowing statements about light travelling from one material medium to another is not correct?

The engine of a car provides a forward force of 1240 N and the total resistive force on the car is 800N. If the mass of the car is 1220 kg, determine the distance the car has to travel from the rest before acquiring a speed of 4 m s\(^{-1}\).

A quantity of water at 0 °C is heated to 30 °C. For each degree rise in temperature, its density will---------