A concave mirror of radius of curvature 20cm produces an inverted image 3 times the size of an object placed on and perpendicular to the axis. Calculate the position of the object and image.(Find u)

Ben (55kg) is standing on very slippery ice when junior (25kg) bumps into him. junior was moving at a speed of 8 m/s before the collision and ben and junior embrace after the collision. find the speed of ben and junior as they move across the ice after the collision. give the answer in m/s. describe the work you did to get the answer.

If the specific heat of a metal is 0.850 j/g °c, what is its atomic weight?

Which model displays the change in a gas when the temperature of the gaseous system decreases?