A slab consists of portions of different materials of the same thickness and having the conductivities K1 and K2. The equivalent thermal conductivity of the slab is:
1.
2.
3.
4.
Two rigid boxes containing different ideal gases are placed on the table. Box \(A\) contains one mole of nitrogen at temperature \(T_0\), while box \(B\) contains \(1\) mole of helium at temperature \(\frac{7T_0}{3}\). The boxes are then put into thermal contact with each other and heat flows between them until the gases reach a common final temperature (ignore the heat capacity of boxes) then the final temperature of gases, \(T_f\) in terms of \(T_0\) is:
1. \(
\frac{2 \mathrm{~T}_0}{5}
\)
2. \( \frac{3 \mathrm{~T}_0}{7}
\)
3. \( \frac{5 \mathrm{~T}_0}{3}
\)
4. \( \frac{9 \mathrm{~T}_0}{7}\)
1. 3000 C
2. 2000 C
3. 5000 C
4. 4000 C
1. 2470 \(\Omega\)
2. 2320 \(\Omega\)
3. 2180 \(\Omega\)
4. 2210 \(\Omega\)
A thin bar magnet of length \(2L\) is bent at the mid-point so that the angle between them is \(60^\circ\). The new length of the magnet is:
1. \(
\frac{\mathrm{L}}{2 \sqrt{3}}
\)
2. \( \frac{\sqrt{3} \mathrm{~L}}{2}
\)
3. \(\mathrm{~L}
\)
4. \(\frac{2 \mathrm{~L}}{3}\)
1. 0.7 V
2. 1.2 V
3. 0.8 V
4. 0.9 V
Given that the reduced temperature, the reduced pressure,
the reduced volume,
Thus, it can be said that the reduced equation of state may be given as:
1.
2.
3.
4.
1. 8.57 L
2. 2.14L
3. 1.28 L
4. 7.51 L