8/33kg
33/80kg
80/33kg
33/8kg
Correct answer is A
Heat given off by the copper = MCt
= 2 x 400 x (100 - 0)
Heat absorbed by the ice = ML
= M x 3.3 x 105
Heat lost = Heat gained
∴ M x 3.3 x 105 = 2 x 400 x 100
∴ M = (2 x 400 x 100)/3.3 x 105
= 8/33Kg
3.0 x 102Km-1
3.0 x 103Km-1
5.0 x 103Km-1
3.0 x 104Km-1
Correct answer is B
Temperature Gradient = \(\frac{\Delta {\text{temp.}}}{\text{thickness}}\)
= \(\frac{80 - 20}{0.02}\)
= \(\frac{60}{0.02}\)
= 3000Km-1
= 3.0 x 103Km-1
I, II and III
I, II, III and IV
I, II and IV
II, III and IV
Correct answer is A
No explanation has been provided for this answer.
2/9°C
4/9°C
9/4°C
9/2°C
Correct answer is B
Energy at the height = mgh
This energy is converted to heat energy - mcΔt
∴ From the principle of energy conversion,
mcΔt = mgh
m x 450 x Δt = m x 10 x 20
∴ Δt = m x 10 x 20/(m x 450)
= 200/450
= 4/9°C
P0/5
4P0/5
P0
5P0
Correct answer is D
At constant T, P1 V1 = P2 V2.
Let P1 = P0 and V1 = V0, then solve accordingly.
As pressure is varies inversely as volume according to:
Boyle's law, also referred to as the Boyle–Mariotte law, or Mariotte's law, is an experimental gas law that describes how the pressure of a gas tends to decrease as the volume of the container increases.
As volume is reduced by one-fifth; pressure will increase by five times.