Discuss the below in detail:
1. Segments of 12mt long steel rails are laid end to end when the temperature is -12 degree C. A space is left between rail segments to allow for thermal expansion.
a. If they are to just touch when the temp is 33degree C, the spacing is ---------
2. A freezer has a coefficient of performance of 2.40 and can convert 1.80 kg of water at 25 degree C to ice at -5 degree c in 1 hr.
a. The heat removed per hour is ------------ and
b. The electrical energy consumed per hour is---------
3. Divers are sealed in deep-dive research vessel on the deck of the mother ship and lowered to a depth of 4000 mt into the ocean. The density of sea water = 1.03 * 10^3 kg/mt^3
a. the force of the water on a 30.5 cm diameter port window is ------------N or --------atm