SSC
PHYSICS
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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The temperature of a 6.0 g sample of glass changed from 20.0
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0.27 J/g
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3.7 J/g
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130 J/g
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12 J/g
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Explanation:
Detailed explanation-1: -The energy needed to raise it by 20 C to a new temperature of 0 C is Eh = 2.04 kiloJoules/kg C) x 3 kilograms x (20 C) = 2.04 x 3 x 20 = 122 kiloJoules.
Detailed explanation-2: -The heat required to raise the temperature of 1 kg of water by 1∘C is called one calorie.
Detailed explanation-3: -or Q =s•m•∆T, where Q is the amount of heat, s is the specific heat, m is the mass of the sample, and ∆T is the temperature change. This equation can be used to calculate the amount of heat that must be involved when the other three values are known or measured.
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