At what speed the velocity head of a stream of water be equal to 40 cm of Hg?

13

Questions Match

1.
At what speed the velocity head of a stream of water be equal to 40 cm of Hg?

1. 282.8 cm/s2. 432.6 cm/s3. 632.6 cm/s4. 832.6 cm/s

2.
An object is at a temperature of 400 °C . At what temperature would it radiate energy twice as fast? The temperature of the surroundings may be assumed to be negligible

1. 200 °C2. 200 K3. 800 °C4. 800 K

3.
The position of two particles P and Q are given as x_P = at + bt² and x_Q = ft – t² respectively. At what time do the cars have same velocity?

1. 2. 3. 4.

4.
At what depth from the surface of the earth, acceleration due to gravity will be the value of g on the surface of the earth?

1. 0.80 R2. 0.75 R3. 1.00 R4. 0.50 R

5.
At what height `h' from the earth surface, acceleration due to gravity becomes half as that of acceleration due to gravity on the surface of earth.
[R = Radius of earth]

1. h = .4/R2. 3. 4. h = R

At what speed the velocity head of a stream of water be equal to 40 cm of Hg?