Which of the following is NOT based on principle of relationship between volume and pressure of air?
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The instrument used for measuring air pressure is called .....
Blocking in experimental design is useful because it
The tendency of undisturbed objects to stay at rest or to keep moving with the same velocity is called
Friction is caused by the ______________ on the two surfaces in contact.
When a bullet is fired from a gun, the gun moves in the opposite direction. This illustrates Newton's
An incident ray strikes a plane mirror at an angle of 20 deg with the mirror. The angle between the incident ray and reflected ray is ____.
An echo is returned in 3 s. What is the distance of the reflecting surface from the source, considering the speed of sound as 342 ms-1?
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