Does the phrase diretion of zero vectro have physical significance?Discuss in terms of velocity, force etc.

What is Gibbs free energy change? Discuss its physical significance.

Name the physical quantity, which is expressed as force times velocity.

The total energy of the hydrogen atom is negative. What significance does this have ?

Bile juice does not have any digestive enzyme but still plays a significant role in the process of digestion. Justify the statement.

Which of the following statement about significant figures is incorrect? A)All non-zero digits are significant B)The trailing zeroes in a number having a decimal point are not significant C)All zeroes between two non-zero digits are significant D)For a number less than one, zeroes on the left of the first non-zero digits are not significant

Show that a force that does no work must be a velocity dependent force.