Physics Past Questions and Answers

The ice and steam points of a thermometer are \(20 mm\) and \(100 mm\) respectively:
A temperature of \(75^{\circ} C\) corresponds to \(Y mm\) on the thermometer. What is \(Y\) ?

An electric kettle with negligible heat capacity is rated at \(2000 W\), if \(2.0 kg\) of water is put in it, how long will take the temperature of water to rise from \(20^{\circ} C\) to \(100^{\circ} C\) ? [Specific heat capacity of water
\(\left.=4200 Jkg ^{-1} K ^{-1}\right]\)

A quantity of ice \(-10^{\circ} C\) is heated until the temperature of the heating vessel is \(90^{\circ} C\). Which of the following constants NOT required to determine the quantity of heat supplied to the vessel?

The scent from a jar of perfume opened moves through the air molecules by ____________

In the diagram above, \(P, Q\) and \(R\) are vectors. Which of the options gives the correct relationship between the vectors?