Physics-Objective Related Question Answers
901. Newton’s second law gives the measure of?
Force
902. The ability of a solid to return to its original shape, on the removal of the external force is called?
Elasticity
903. If a solid does not regain its original shape and size, when the deforming force is removed, it is called?
Plastic
904. Substances which can be elastically stretched to large values of strain are called?
elastomers
905. An elastomer in human body?
Aorta
906. The mass per unit volume of a substance is known as its?
density
907. The ship entering from a river in to sea rises up a little. Why?
The density of a sea water is higher than that of river water
908. An iron nail floats on mercury but sinks in water, why?
The specific density of iron is lower than that of mercury and higher that that of water
909. Clouds float in the atmosphere because of their low.........?
density
910. Whenever a body is immerced partially or completely in a fluid, it experiences an upward force. This is called,?
buoyancy
911. Icebergs float in sea water because the density of ice is?
less than water
912. The shape of rain drop is spherical due to?
surface tension
913. The force of attraction between the molecules of same material is called?
Cohesive force
914. The force of attraction between molecules of two different material is called?
adhesive force
915. The most characteristic property of liquid is?
fluidity
916. Newton/metre² is the unit of?
pressure
917. When salt is added to water, its surface tension?
increases
918. A body is floating in a liquid, the upthrust on the body is?
equal to the weight displaced
919. The sudden fall of atmospheric pressure predicts?
storm
920. Substances that reduces friction are called?
lubricants
921. The heat energy required to raise the temperature of one gram of water by 1°C is called one?
calorie
922. 1 calorie equals?
4.2 joules
923. The quantity of heat required to raise the temperature of unit mass of a substance by 1°C is called its?
specific heat
924. Which liquid possess lowest specific heat?
Mercury
925. The temperature at which a solid substance gets converted into a liquid is called its?
melting point (fusion point)
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