Why is it said that
The pulled out piston of syringe if released gets immediately pushed inside again.

Fill in the blanks. ____________are used very quickly by cells but if a cell is not in need of all the energy released immediately then it may get stored.

It is said, that the harmful alleles get eliminated from population over'a period of,time, yet sickle cell anaemia is' persisting in human population. Why?

A piston of cross sectional area 2cm^2 pushes the liquid out of a tube whose area at the outlet is 40mm^2 . The piston is pushed at a rate of 2cm//s . Determine the speed at which the fluid leaves the tube.

Question based on paragraph : A boy pushed his toy car on a table . The car moved ahead and stopped after travelling a certain distance . But when he kept on pushing his car , the car started moving with a uniform velocity . The boy later decided to do some adventurous activity while playing with his car , so he launched his toy car from a platform to a bucket filled with water as soon as the car landed inside the bucket , the water from the bucket splashed out and the boy enjoyed his new game .: Why did the toy car stop after travelling a certain distance ?

A student was observing a slide with no label under microscope. The section had some vascular bundles scattered in the ground tissue. It is section of a monocot stem! He exclaimed. No! It is section of fern rachis, said the teacher. Teacher told to observe vascular bundle again. Student agreed. Why?

Elders always instruct you to get out to the home to interact with relatives and others and play outdoor games but not to spend time continously with television, phone and internet. Why the children of your age are instructed same in each home ?

Question based on paragraph : A boy pushed his toy car on a table . The car moved ahead and stopped after travelling a certain distance . But when he kept on pushing his car , the car started moving with a uniform velocity . The boy later decided to do some adventurous activity while playing with his car , so he launched his toy car from a platform to a bucket filled with water as soon as the car landed inside the bucket , the water from the bucket splashed out and the boy enjoyed his new game .: Which type of force was applied by the boy when he kept on pushing the car ?

Question based on paragraph : A boy pushed his toy car on a table . The car moved ahead and stopped after travelling a certain distance . But when he kept on pushing his car , the car started moving with a uniform velocity . The boy later decided to do some adventurous activity while playing with his car , so he launched his toy car from a platform to a bucket filled with water as soon as the car landed inside the bucket , the water from the bucket splashed out and the boy enjoyed his new game .: What is the reason for splashing of water out from the bucket ?