Q. No.1. \(P+\rho g h+\dfrac{1}{2} \rho v^2=\text { constant }\)
2. \({P}+\rho {gh}+\rho {v}^2=\text{constant}\)
3. \(P+{mgh}+\dfrac{1}{2} {mv}^2=\text { constant }\)
4. \({P}+\dfrac{1}{2} \rho g h+\dfrac{1}{2} \rho {v}^2=\text { constant }\)
1. \(\sqrt{gh}\)
2. \(\sqrt{2gh}\)
3. \(2\sqrt{gh}\)
4. \(\sqrt{gh/2}\)
(take \(g=10~\text{m/s}^2\) )
1. \(100~\text {m/s}\)
2. \(50~\text {m/s}\)
3. \(10~\text {m/s}\)
4. \(8~\text {m/s}\)
A cylinder of height \(20~\text{m}\) is completely filled with water. The velocity of efflux of water (in \(\text{ms}^{-1}\)) through a small hole on the side wall of the cylinder near its bottom, is:
1. \(10~\text{m/s}\)
2. \(20~\text{m/s}\)
3. \(25.5~\text{m/s}\)
4. \(5~\text{m/s}\)
The speed of water stream at which velocity head is \(10\text{ cm}\) of water will be: (take \(g = 1000\text{ cm/s}^2\))
1. \(121.2\text{ cm/s}\)
2. \(173.1\text{ cm/s}\)
3. \(141.4\text{ cm/s}\)
4. \(135.5\text{ cm/s}\)
| 1. | \(\sqrt{gH}\) | 2. | \(\sqrt{2gH}\) |
| 3. | \(\large\sqrt\frac{gH}{2}\) | 4. | \(2\sqrt{gH}\) |
The speed of flow past the lower surface of a wing of an aeroplane is \(50\text{ m/s}.\) What speed of flow over the upper surface will give a dynamic lift of \(1000\text{ Pa}~\)? (density of air = \(1.3\text{ kg/m}^3\)):
1. \(25.55\text{ m/s}\)
2. \(63.55\text{ m/s}\)
3. \(13.25\text{ m/s}\)
4. \(6.355\text{ m/s}\)
1. momentum
2. mass
3. energy
4. angular momentum
| 1. | \(20~\text{kJ/m}^3\) | 2. | \(10~\text{kJ/m}^3\) |
| 3. | \(40~\text{kJ/m}^3\) | 4. | \(30~\text{kJ/m}^3\) |
| 1. | \(500~\text{J/m}^3\) | 2. | \(1000~\text{J/m}^3\) |
| 3. | \(1500~\text{J/m}^3\) | 4. | \(2000~\text{J/m}^3\) |
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