Advanced English Vocabulary. Stop Saying "Very" #shorts

A hammer of mass 500g , moving at 50m//s , strikes a nail. The nail stops the hammer in a very short time of 0.01 s . What is the force of the nail on the hammer?

If the plane of vibrations of the string is changed randomly in a very short intervals of time, it is known as

In which type of chromosome, one arms is very long and one arm is very long and one arm is very short