C
D
B
A
Correct answer is C
See the velocity-time graph.
10cm
20cm
25cm
15cm
Correct answer is D
M = \(\frac{v}{u}\) = 3 = \(\frac{v}{30}\). V = 30m
\(\frac{1}{u}\) + \(\frac{1}{v}\) = \(\frac{1}{f}\) = \(\frac{1}{10}\) - \(\frac{1}{30}\) = \(\frac{1}{f}\)
\(\frac{3 - 1}{30}\) = \(\frac{1}{f}
f = \(\frac{30}{2}\) = 15cm
Boiling occurs when the vapour pressure of a liquid is
At the evaporation point
Less than the atmospheric pressure
Greater than the atmospheric pressure
Equal to the atmospheric pressure
Correct answer is D
No explanation has been provided for this answer.
The impulse of a force is deduced from Newton's second law as
F = ma
F = m( \(\frac{v - u}{t}\)
F = mg
F = mv - mu
Correct answer is B
No explanation has been provided for this answer.
A manometer is an instrument used for measuring
Relative density of liquid
Pressure in liquids and gases
Humidity
Atmospheric pressure
Correct answer is B
a manometer is used to measure pressure in liquids and gases. Manometer gauges measure the pressure of gases and vapors from atmospheric to about 1 Pa by balancing the force exerted by the gas or vapor against the weight of a column of liquid, usually mercury, water, or oil.
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