1 Joule =___ calorie

Suppose that A, B, C, D represent the energies of 1 erg, 1 Joule, 1 calorie, 1 Kcalorie. What is the correct order of magnitudes of their energies ?

In an experiment a sphere of aluminium of mass 0.20 kg is heated upto 150^(@) C. Immediately, it is put into water of volume 150 cc at 27^(@)C kept in a calorimeter of water equivalent to 0.025 kg. Final temperature of the system is 40^(@)C . The specific heat of aluminium is (take 4.2 Joule = 1 calorie)

A gas expands by 0.5L against a constant pressure of 1 atm . Calculate the work done in joule and calorie.

A gas expands by 2 litres against a constant pressure of 2 atm. Calculate work done in Joule and Calorie.

A meteorite weighing 2000kg enters the earth's atmosphere with a velocity of 1000 km per second. How many calories of heat will be produced ( J=4.49 joules per calorie).

One mole of a gas expands by 3L against a constant pressure of 3 atmosphere. Calculate the work done in : (a) L. atmosphere (b) Joules (c) Calories

What is the horse power applied by a person while chewing 100g of ice per minute ? Given J = 4.2 joule per calorie.