How much energy, in joules, is released when 10 kilograms of ice is cooled from -10 celsius to -20 celsius?

Answer

420,000 Joules

Explanation

When ice cools from -10 t0 -20, it releases energy in form of heat. This energy is given by;

Quantity of heat (Energy) = mθC

Where m ⇒ mass of ice

θ ⇒ Change in temperature.

C ⇒ specific heat capacity of ice (water) = 4200 J/Kg/K

∴ Energy = mθC

= 10 × (-10 - -20) × 4200

= 10 × 10 × 4200

= 420,000 Joules

The specific heat capacity of ice is 2.108 kJ/kgK. The heat released can be calculated from the formula

Thus the amount of energy released in Joules is 210,800 J.

which piece of furniture will have the most inertia and give the furniture movers the most difficulty in moving?  

answer

a 75kg dining table