What is the difference between dark matter and anti-matter? explain.

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

Debbie places two shopping carts in a cart corral she pushes the first cart which then pushes a second cart what force is being exerted

In positive numbers less than 1, the zeros between the decimal point and a non-zero number are blank significant