1.Which of the following not a unit of length?
 A. Light year
 B. Micron
 C. AU
 D. Radian
 
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2.When a ship enters the sea from a river, it floats up because:
 A. Sea water is warmer
 B. The speed of the ship on the sea is greater
 C. The density of the river water is greater
 D. Salt water of the sea is denser
 
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3.Kinetic energy of molecules is highest in:
 A. Gases
 B. Solids
 C. Liquids
 D. Solutions
 
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4.The nature of motion of a sewing machine is:
 A. Circular motion
 B. Translational motion
 C. Oscillatory motion
 D. Rotational motion
 
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5.The weight of an iron ball on earth is 12 kg. Its weight on moon will be:
 A. 18 kg.
 B. 9 kg.
 C. 12 kg.
 D. 2 kg
 
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6.Electrical energy is converted into mechanical energy by a:
 A. Thermostat
 B. Motor
 C. Dynamo
 D. Rectifier
 
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7.Hubble is a:
 A. Nuclear weapon
 B. Musical instrument
 C. Space telescope
 D. Star
 
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8.The ratio of the velocity of a body to the velocity of sound is called:
 A. Magic number
 B. Laplace number
 C. Natural number
 D. Mach number
 
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