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.
A satellite revolving around the earth is kept on its orbit by?
Centripetal forces only
Centripetal and frictional forces
Centrifugal forces only
Centripetal and centrifugal forces
Correct answer is A
The concept of centrifugal force can be applied in rotating devices, such as centrifuges, centrifugal pumps, centrifugal governors, and centrifugal clutches, and in centrifugal railways, planetary orbits and banked curves, when they are analyzed in a rotating coordinate system
Which of the following statements about wave motion is correct?
Electromagnetic waves are transverse
Transverse waves do not require a medium for propagation
Longitudinal waves vibrate perpendicular to the direction of travel
All mechanical waves are longitudinal
Correct answer is A
No explanation has been provided for this answer.
Which of the following instruments can be used to measure current in an a.c circuit?
Hot wire ammeter
Moving coil ammeter
Tangent galvanometer
Moving coil galvanometer
Correct answer is D
No explanation has been provided for this answer.