DELSU Physics 2020/2021 Past Questions

The equation P^xV^yT^z = constant is Charles law when

A mercury-in-glass thermometer reads 20° at the ice point and 100° at the steam point. Calculate the Celsius temperature corresponding to 70° on the thermometer.

A brass rod is 2m long at a certain temperature. Calculate the linear expansion of the rod for a temperature change of 100k. (Take the linear expansivity of brass as 1.8 x 10^-5 K^-1

A force of 100 N is needed to lift a load of 50 N using a pulley system whose velocity ratio is 4. The efficiency of the system is __.

What is the frequency of vibration if the balance wheel of a wrist watch makes 90 revolutions in 25s?

If a body of mass 5 kg is thrown vertically upwards with velocity u, at what height will the potential energy equal to the kinetic energy?

Counting of currency notes with moist fingers is based on the principles of

The original length of copper wire was 40m before its temperature was changed from 22%deg;C to 47°C. If the linear expansivity of copper is 1.6 × $$10^{-5}C^{-1}$$. Calculate the increase in the length of the copper wire.

A mass of oxygen has a volume of $$0.4m^3$$ at atmospheric pressure of 101kPa and temperature 70°C. What will its volume be if pressure is increased to 108kPa while its temperature is increased to 17.0°C

Consider 8.0g of ice initially at 0°C heated to 10°C.If the latent heat of fusion ice is 320kJ/kg, estimate the total heat supplied to the ice

The temperature at which the water vapour present in the air saturates the air and begins to condense is known as ..