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Concrete
A toy rocket ejects 0.05 kg gas per second with a speed of 400 m/s the accelerating force on the rocket is :
A travelling wave passes a point of observation where the time interval between successive crests is 0.2 s. Which of the following is then true?
A vacuum cleaner works on the principle of pressure difference. On the moon it will
A weightless rubber balloon has 100gm of water in it. Its weight in water will be
A weightless rubber balloon is filled with 200 cc of water. Its weight in water is equal to
A wheel-barrow is an example of
A white and smooth surface is -
A yellow dust appears on the fingers, whenever we touch the middle of a flower. These tiny yellow grains are one of the most precious substances in nature because they contain the secret of plant life. What is this dust called?
Aadami mein gunsutra ki sankhya kitni hoti hai
Ability of the eye to see objects at all distances is called