Molecular Physics | Thermodynamics Answers

The length of the mercury column in a mercury-in-glass thermometer is 

5 cm when the bulb is immersed in water at its triple point. What is the 

temperature on the mercury-in-glass scale when the length of the col￾umn is 6.0 cm? What will the length of the column be when the bulb is 

immersed in a liquid at 100° above the ice point, as measured on the mer￾cury-in-glass scale? If the length of the column can be measured to within 

only 0.01 cm, can this thermometer be used to distinguish between the 

ice point and the triple point of water? You may take the temperature of 

the ice point, as measured on the mercury-in-glass scale, as 273.15 K.

Determine the change in volume of a block of 

cast iron 5.0 cm x 10 cm x 6.0 cm, when the 

temperature changes from 15 0C to 47 0C. The 

coefficient of linear expansion of cast iron is 

0.000010 0C-1

An iron casting of mass 30kg at 400oC is being cooled and it 

gives out heat on an average of 920J/s. Calculate its temperature 

after 1 hour? (Specific heat capacity of iron = 460Jkg -1oC

 -1). 

400-N cargo rest on the inclined ladder which makes an angle of 350 with the horizontal. Find the component force on this perpendicular to the plane.

Estimate the heat capacity of steam at 100°C

A model turbine having diameter 0.4 m develops 15 kW when working under a head of 5m at

its best speed of 1600 rpm. If a geometrical similar turbine having diameter 1.6m operates at

the same efficiency under 18 m head. Find the speed and power developed by the actual turbine.

Define stagnation temperature. Air leaves the compressor of a jet engine at a temperature of

150°C, a pressure of 5 bar and a velocity of 120m/s. Determine the isentropic stagnation

temperature and pressure. 

A cylinder of diameter 1cm at temp 30c is to be slid into a hole in steel plate.the hole had a diameter of 0.99970cm at temp 30c.To what temp must the plate be heated?

10 kg water falls through a distance of 854m and all the energy is effective in heating the water.To what temperature will the water be raised if it was initially at 20c?

Hello, I was wondering, when particles in the quantum foam appear do they bring energy with them? And if so would that mean that one would have to come in and one would have to go out at the same time to not add or remove energy from the universe?