Aconvex mirror with a focal length 20 cm creates a virtual image 10cm away from the mirror. what is the position of the object?

Picture a all traveling at a constant speed around the inside of a circular structure. is the ball accelerating? explain your answer

The man of mass m1 and the woman of mass m2 are standing on opposite ends of the platform of mass m0 which moves with negligible friction and is initially at rest with s = 0. the man and woman begin to approach each other. derive an expression for the displacement s of the platform when the two meet in terms of the displacement x1 of the man relative to the platform.

Name two kinds of practical electric pumps.