200g
300g
320g
400g
Correct answer is A
Heat lost = Heat gained
mcθ = mL
m x 4200 x 17 = 42 x 3.4 x 105
therefore, m = 200g
The parts of a bar magnet at which the magnetic effect is strongest are called the ...
When an atom loses or gain a charge it becomes ...
In the normal use of a simple microscope, a person sees an ...
A simple barometer is constructed using a liquid Q1 of density 16.2g/cm3. Calculate th...
The difference between X-rays and gamma rays is that ...
Which of the following statements is CORRECT about the earth's magnetic field? ...
Hot water at a temperature of t is added to twice that amount of water at a temperature of 30°C....