What essential characteristic does a good experiment have? a. a control group is given the experimental treatment. b. a single variable is tested. c. a control is used. d. both b and c

Abody of weight 60 kg is standing in a lift the lift going upward with a uniform velocity of 4.9 metre per second slows down and stops in two seconds then apparent weight of the body during the slow down process is

What is relative velocity? in which condition is relative velocity known by adding the velocity of the first body and that of the second body

What causes the development of most clouds and precipitation in the atmosphere?