366815
A Sealed glass jar is full of water. When it is kept in a freezing mixture, it is broken because
1 Water expands from\(4^\circ C\) to \(0^\circ C\)
2 Ice expands while melting
3 Water expands due to freezing
4 Ice expands since its temperature falls below \(0^\circ C\)
Explanation:
Water density is maximum at \(4^\circ C\). If we heat or cool water present at \(4^\circ C\) expands. Option (1) is correct
PHXI11:THERMAL PROPERTIES OF MATTER
366816
A metal ball suspended from the hook of a spring balance is kept immersed in a liquid other than water. On increasing the temperature of this liquid, the reading in the spring balance.
1 Increases
2 Decreases
3 Remains same
4 May increases or decreases
Explanation:
On heating density of liquid decreases and hence buoyancy force decreases and the tension in the spring increases.
PHXI11:THERMAL PROPERTIES OF MATTER
366817
If \(d_{1}\) and \(d_{2}\) are the densities of a liquid at \({t_1}^\circ C\) and \({t_2}^\circ C,\) then \(\dfrac{d_{1}}{d_{2}}\) is \((\gamma=\) coefficient of real expansion)
1 \(\dfrac{1+\gamma t_{1}}{1+\gamma t_{2}}\)
2 \(\dfrac{1-\gamma t_{1}}{1-\gamma t_{2}}\)
3 \(\dfrac{1+\gamma t_{2}}{1+\gamma t_{1}}\)
4 \(\dfrac{1-\gamma t_{2}}{1-\gamma t_{1}}\)
Explanation:
Let \(d\) is the density of the liquid at \(0^\circ C\) then \({d_1} = \frac{d}{{1 + \gamma {t_1}}}\,\& \,{d_2} = \frac{d}{{1 + \gamma {t_2}}}\) \( \Rightarrow \frac{{{d_1}}}{{{d_2}}} = \frac{{1 + \gamma {t_2}}}{{1 + \gamma {t_1}}}\)
PHXI11:THERMAL PROPERTIES OF MATTER
366818
An aluminium sphere is dipped into water. Which of the following is true?
1 Buoyancy will be less in water at \(0^\circ C\) than that is water at \(4^\circ C\)
2 Buoyancy will be more in water at \(0^\circ C\) than that is water at \(4^\circ C\)
3 Buoyancy in water at \(0^\circ C\)will be same as that in water at \(4^\circ C\)
4 Buoyancy may be more or less in water at \(4^\circ C\) depending on the radius of the sphere
Explanation:
Let \(V\) be the volume of the sphere and \(\rho\) be the density of water. Buoyancy (\(F\)) on the sphere due to water is \(F=V \rho g\) Since, \(\rho_{0{ }^{\circ} \mathrm{C}} < \rho_{4{ }^{\circ} \mathrm{C}}\), so, \(F_{0^{\circ} \mathrm{C}} < F_{4{ }^{\circ} \mathrm{C}}\).
366815
A Sealed glass jar is full of water. When it is kept in a freezing mixture, it is broken because
1 Water expands from\(4^\circ C\) to \(0^\circ C\)
2 Ice expands while melting
3 Water expands due to freezing
4 Ice expands since its temperature falls below \(0^\circ C\)
Explanation:
Water density is maximum at \(4^\circ C\). If we heat or cool water present at \(4^\circ C\) expands. Option (1) is correct
PHXI11:THERMAL PROPERTIES OF MATTER
366816
A metal ball suspended from the hook of a spring balance is kept immersed in a liquid other than water. On increasing the temperature of this liquid, the reading in the spring balance.
1 Increases
2 Decreases
3 Remains same
4 May increases or decreases
Explanation:
On heating density of liquid decreases and hence buoyancy force decreases and the tension in the spring increases.
PHXI11:THERMAL PROPERTIES OF MATTER
366817
If \(d_{1}\) and \(d_{2}\) are the densities of a liquid at \({t_1}^\circ C\) and \({t_2}^\circ C,\) then \(\dfrac{d_{1}}{d_{2}}\) is \((\gamma=\) coefficient of real expansion)
1 \(\dfrac{1+\gamma t_{1}}{1+\gamma t_{2}}\)
2 \(\dfrac{1-\gamma t_{1}}{1-\gamma t_{2}}\)
3 \(\dfrac{1+\gamma t_{2}}{1+\gamma t_{1}}\)
4 \(\dfrac{1-\gamma t_{2}}{1-\gamma t_{1}}\)
Explanation:
Let \(d\) is the density of the liquid at \(0^\circ C\) then \({d_1} = \frac{d}{{1 + \gamma {t_1}}}\,\& \,{d_2} = \frac{d}{{1 + \gamma {t_2}}}\) \( \Rightarrow \frac{{{d_1}}}{{{d_2}}} = \frac{{1 + \gamma {t_2}}}{{1 + \gamma {t_1}}}\)
PHXI11:THERMAL PROPERTIES OF MATTER
366818
An aluminium sphere is dipped into water. Which of the following is true?
1 Buoyancy will be less in water at \(0^\circ C\) than that is water at \(4^\circ C\)
2 Buoyancy will be more in water at \(0^\circ C\) than that is water at \(4^\circ C\)
3 Buoyancy in water at \(0^\circ C\)will be same as that in water at \(4^\circ C\)
4 Buoyancy may be more or less in water at \(4^\circ C\) depending on the radius of the sphere
Explanation:
Let \(V\) be the volume of the sphere and \(\rho\) be the density of water. Buoyancy (\(F\)) on the sphere due to water is \(F=V \rho g\) Since, \(\rho_{0{ }^{\circ} \mathrm{C}} < \rho_{4{ }^{\circ} \mathrm{C}}\), so, \(F_{0^{\circ} \mathrm{C}} < F_{4{ }^{\circ} \mathrm{C}}\).
366815
A Sealed glass jar is full of water. When it is kept in a freezing mixture, it is broken because
1 Water expands from\(4^\circ C\) to \(0^\circ C\)
2 Ice expands while melting
3 Water expands due to freezing
4 Ice expands since its temperature falls below \(0^\circ C\)
Explanation:
Water density is maximum at \(4^\circ C\). If we heat or cool water present at \(4^\circ C\) expands. Option (1) is correct
PHXI11:THERMAL PROPERTIES OF MATTER
366816
A metal ball suspended from the hook of a spring balance is kept immersed in a liquid other than water. On increasing the temperature of this liquid, the reading in the spring balance.
1 Increases
2 Decreases
3 Remains same
4 May increases or decreases
Explanation:
On heating density of liquid decreases and hence buoyancy force decreases and the tension in the spring increases.
PHXI11:THERMAL PROPERTIES OF MATTER
366817
If \(d_{1}\) and \(d_{2}\) are the densities of a liquid at \({t_1}^\circ C\) and \({t_2}^\circ C,\) then \(\dfrac{d_{1}}{d_{2}}\) is \((\gamma=\) coefficient of real expansion)
1 \(\dfrac{1+\gamma t_{1}}{1+\gamma t_{2}}\)
2 \(\dfrac{1-\gamma t_{1}}{1-\gamma t_{2}}\)
3 \(\dfrac{1+\gamma t_{2}}{1+\gamma t_{1}}\)
4 \(\dfrac{1-\gamma t_{2}}{1-\gamma t_{1}}\)
Explanation:
Let \(d\) is the density of the liquid at \(0^\circ C\) then \({d_1} = \frac{d}{{1 + \gamma {t_1}}}\,\& \,{d_2} = \frac{d}{{1 + \gamma {t_2}}}\) \( \Rightarrow \frac{{{d_1}}}{{{d_2}}} = \frac{{1 + \gamma {t_2}}}{{1 + \gamma {t_1}}}\)
PHXI11:THERMAL PROPERTIES OF MATTER
366818
An aluminium sphere is dipped into water. Which of the following is true?
1 Buoyancy will be less in water at \(0^\circ C\) than that is water at \(4^\circ C\)
2 Buoyancy will be more in water at \(0^\circ C\) than that is water at \(4^\circ C\)
3 Buoyancy in water at \(0^\circ C\)will be same as that in water at \(4^\circ C\)
4 Buoyancy may be more or less in water at \(4^\circ C\) depending on the radius of the sphere
Explanation:
Let \(V\) be the volume of the sphere and \(\rho\) be the density of water. Buoyancy (\(F\)) on the sphere due to water is \(F=V \rho g\) Since, \(\rho_{0{ }^{\circ} \mathrm{C}} < \rho_{4{ }^{\circ} \mathrm{C}}\), so, \(F_{0^{\circ} \mathrm{C}} < F_{4{ }^{\circ} \mathrm{C}}\).
366815
A Sealed glass jar is full of water. When it is kept in a freezing mixture, it is broken because
1 Water expands from\(4^\circ C\) to \(0^\circ C\)
2 Ice expands while melting
3 Water expands due to freezing
4 Ice expands since its temperature falls below \(0^\circ C\)
Explanation:
Water density is maximum at \(4^\circ C\). If we heat or cool water present at \(4^\circ C\) expands. Option (1) is correct
PHXI11:THERMAL PROPERTIES OF MATTER
366816
A metal ball suspended from the hook of a spring balance is kept immersed in a liquid other than water. On increasing the temperature of this liquid, the reading in the spring balance.
1 Increases
2 Decreases
3 Remains same
4 May increases or decreases
Explanation:
On heating density of liquid decreases and hence buoyancy force decreases and the tension in the spring increases.
PHXI11:THERMAL PROPERTIES OF MATTER
366817
If \(d_{1}\) and \(d_{2}\) are the densities of a liquid at \({t_1}^\circ C\) and \({t_2}^\circ C,\) then \(\dfrac{d_{1}}{d_{2}}\) is \((\gamma=\) coefficient of real expansion)
1 \(\dfrac{1+\gamma t_{1}}{1+\gamma t_{2}}\)
2 \(\dfrac{1-\gamma t_{1}}{1-\gamma t_{2}}\)
3 \(\dfrac{1+\gamma t_{2}}{1+\gamma t_{1}}\)
4 \(\dfrac{1-\gamma t_{2}}{1-\gamma t_{1}}\)
Explanation:
Let \(d\) is the density of the liquid at \(0^\circ C\) then \({d_1} = \frac{d}{{1 + \gamma {t_1}}}\,\& \,{d_2} = \frac{d}{{1 + \gamma {t_2}}}\) \( \Rightarrow \frac{{{d_1}}}{{{d_2}}} = \frac{{1 + \gamma {t_2}}}{{1 + \gamma {t_1}}}\)
PHXI11:THERMAL PROPERTIES OF MATTER
366818
An aluminium sphere is dipped into water. Which of the following is true?
1 Buoyancy will be less in water at \(0^\circ C\) than that is water at \(4^\circ C\)
2 Buoyancy will be more in water at \(0^\circ C\) than that is water at \(4^\circ C\)
3 Buoyancy in water at \(0^\circ C\)will be same as that in water at \(4^\circ C\)
4 Buoyancy may be more or less in water at \(4^\circ C\) depending on the radius of the sphere
Explanation:
Let \(V\) be the volume of the sphere and \(\rho\) be the density of water. Buoyancy (\(F\)) on the sphere due to water is \(F=V \rho g\) Since, \(\rho_{0{ }^{\circ} \mathrm{C}} < \rho_{4{ }^{\circ} \mathrm{C}}\), so, \(F_{0^{\circ} \mathrm{C}} < F_{4{ }^{\circ} \mathrm{C}}\).
