3 : 5
5 : 3
3 : 7
7 : 3
Correct answer is B
Heat lost = heat gained
mH x c x (70 - 45) = mc x c x (45 - 30)
\(\frac{m_c}{m_H}\) = \(\frac{5}{3}\)
1.15 x 109 s
1.15 x 107 s
1.15 x 105 s
1.15 x 104 s
Correct answer is D
Heat energy = Elect. energy
0.5 x 2.3 x 106 = 100t
t = 1.15 x 104s
What happens when a, certain quantity of pure ice is completely changed to water at 0oC?
latent heat is absorbed, the mass remains constant, and the volume decreases
latent heat is given out, the mass remains constant and the volume decreases
latent heat is given out, the mass increases and the volume remains constant
latent heat is absorbed, the mass decreases and the volume increases
Correct answer is A
No explanation has been provided for this answer.
400oC
300oC
273oC
127oC
Correct answer is D
\(\frac{P_1}{T_1}\) = \(\frac{ P_2}{T_2}\)
\(\frac{3 \times\ 10^6}{27 + 273}\) = \(\frac{4 \times\ 10^6}{0 + 273}\)
\(\theta\) = 127oC
the specific heat capacity of copper is lower than that of rubber
copper expands more than rubber
the specific heat capacity of rubber is lower than that of copper
rubber expands more than copper
Correct answer is A
No explanation has been provided for this answer.