A uniform mettalic bar of length 100cm and mass 40kg is supported horizontally by two vertical spring balances A an B balance A is 20cm from one end while balanceB is 30cm from the other end find the reading of each individual balance AB

As a car drives with its tires rolling freely without any slippage, the type of friction acting between the tires and the road is 100) a) static friction. b) kinetic friction. c) a combination of static and kinetic friction. d) neither static nor kinetic friction, but some other type of friction. e) it is impossible to tell what type of friction acts in this situation.

What would be the result of an alpha particle coming into a magnetic field? a) the alpha particle will stop moving. b) the alpha particle will reverse its direction. c) the alpha particle will be deflected in a curve path. d) the alpha particle will continue to travel in a straight line.

Select all the correct answers. which three statements about electromagnetic radiation are true?