How many bones are there in an adult human being?

The term ‘Blue Shift’ is used to indicate?

A. Doppler effect in which an object appears bluer when it is moving towards the observer or observer is moving towards the object.
B. Turning a star from white to blue
C. In future sun would become blue
D. Black hole was blue at its start
E. None of these

How many eyes does a worm have?

A. Two
B. Three
C. One
D. None

A worm has no arms, legs or eyes. There are approximately 2,700 different kinds of earthworms. Worms live where there is food, moisture, oxygen and a favorable temperature. If they don’t have these things, they go somewhere else

During which process does heat transfer occur because of density differences__________?

A. Convection 
B. Radiation
C. Conduction
D. None of these

Caustic Soda is extensively used for making __________?

A. Surf
B. Soap
C. Plaster of Paris
D. Gum

The Reason for a Swimming Pool to appear Less Deep than the actual depth is__________?A. Refraction
B. Light scattering
C. Reflection
D. Interference

A pool of water appears to be less deep than it actually is because light rays from bottom of pool are bent away from the normal as they pass from water into the air. This makes the pool appear shallower than it really is.

Because of the refraction of light.
Refection of Light:Refraction is the bending of light as it passes from one transparent substance into another.Light refracts whenever it travels at an angle into substance with a different refractive index.
Refraction is the bending of a wave when it enters a medium where its speed is different. The refraction of light when it passes from a fast medium to a slow medium bends the light ray toward the normal to the boundary between the two media.

 

What is the average distance of the moon from earth?

A. 384,400 km
B. 350,000 km
C. 380,200 km
D. 384,500 km