What is the difference in the amount of heat given out by...
What is the difference in the amount of heat given out by 4kg of steam and 4kg of water when both are cooled from 100oC to 80oC? (Specific latent heat of steam = 2.260,000J kg-1) (Specific heat capacity of water =4,200 J kg-1)
336,000J
672,000J
8,704,000J
9,040,000J
9,376,000J
Correct answer is C
\(Q_{s} - Q_{w} = (4 \times 2260000) - (4 \times 4200 \times (100 - 80))\)
= \(9040000 - 336000\)
= \(8,704,000 J\)
The eclipse of the moon occurs when? ...
From the diagram above, calculate the energy stored in the capacitor ...
Which of the following is true of sounds? ...
The joule is equivalent to? ...
\( ^{235} _{92}U + ^1 _0n → ^{144} _{56}Ba + ^{90} _{36}Kr +2X \) In the reaction above, X is...