Specific heat of Cu is 0.095, iron 0.115, brass 0.092 and water 1. Which of the above can be heated quickly when they are kept in sunlight with same masses?
A) Iron
B) Brass
C) Copper
D) Water
1 Answers
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Fill in the blanks Substance through which heat travels easily and quickly are said to be _________of heat.
Correct Answer - good conductors
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……….. can search the house much more quickly than you can.
(D) Fire fighters
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State the relation between principal specific heat capacity and molar specific heat capacity for a gas.
Molar specific heat capacity = Molecular weight × principal specific heat capacity. i.e. CV = μ × SP and CV = μ × SV where, μ is the molecular weight of the gas. [Note: Symbols (SV) and...
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If the temperature of 4 kg mass of a material of specific heat capacity 300 J/ kg °C rises from 20 °C to 30 °C. Find the heat received.
m = 4 kg, s = 300 J/kg °C ∆T = 30 – 20 = 10 °C To find: Heat received (Q) Formula: Q = ms∆T Calculation: From formula, Q = 4 × 300 ×...
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Calculate the difference in the temperatures between the water at the top and bottom of a water fall 200 m high. Specific heat of water
Given: s = 4200 J kg-1 °C-1, h = 200 m To find: Difference in temperatures (∆T) Formulae: (i) Q = ms∆T (ii) P.E. = mgh Calculation: From formulae (j) and (ii) When water falls from top...
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1 gm of water at 20°C is heated till its temperature raises to 21 °C. The amount of heat energy absorbed by the water is ………………..
Correct option is B) 1 calorie
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1 kg of water at 300 K is heated till its temperature raises to 301K. The amount of heat energy absorbed by the water is …………………..
Correct option is C) c,d
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An iron rod changed into iron oxide by rusting. Guess how the weights before and after rusting of the iron rod are changed,
Correct option is C) a = b
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In which of the following situations you can taste quickly ?
C) Press the tongue slowly against the palate
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Which of the above evaporates quickly ? A) Cl) B) (2)
Correct option is C) (3)
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