39.2N
19.6N
14.2N
7.4N
5.1N
Correct answer is B
f \(\alpha\) \(\sqrt{T}\)
\(\frac{f_1}{f_2} = \sqrt{\frac{T_1}{T_2}}\)
\(\frac{250}{350} = \sqrt{\frac{10}{T_2}}\)
\(\frac{5}{7} = \sqrt{\frac{10}{T_2}}\)
\(\frac{25}{49} = \frac{10}{T_2}\)
T2 = \(\frac{49 \times 10}{25} = 19.6\)
f/4
f/2
f
2f
4f
Correct answer is D
No explanation has been provided for this answer.
0.5Jg-1
2.5Jg-1
15.0Jg-1
450.0Jg-1
150Jg-1
Correct answer is B
Pt = mL
L = \(\frac{pt}{m} = \frac{90 \times 5}{180}\)
= 2.5
4800J
1200J
480J
202J
80J
Correct answer is C
H = mC\(\theta\) = 200 x 0.4 x 6
= 480J
3.4 x 10-5m3
4.3 x 10-5m3
3.4 x 10-5m3
3.4 x 10-3m3
3.4 x 10-2m3
Correct answer is C
V = \(\frac{m}{p}= \frac{170}{8.5 x 10^{-3}}\) = 0.02
= \(\Delta\)\(\frac{\delta V}{V \delta T}\)
\(\delta V\) = \(\Delta\) x V x \(\delta\)T
= 5.7 x 10-5 x 0,02 x 30
= 0 3.42 x 10-5