The radius of a solid sphere is measured to be (6.25 ± 0.28) cm, and its mass is measured to be (1.77 ± 0.07) kg. determine the density of the sphere in kilograms per cubic meter and the uncertainty in the density. (use the correct number of significant figures. use the following formula to calculate the uncertainty in the density:

Which of these is not a possible type of energy transformation? a. electrical energy into light energy b. sound energy into nuclear energy c. potential energy into kinetic energy d. kinetic energy into mechanical energy

Two manned satellites approaching one another at a relative speed of 0.550 m/s intend to dock. the first has a mass of 2.50 ✕ 103 kg, and the second a mass of 7.50 ✕ 103 kg. assume that the positive direction is directed from the second satellite towards the first satellite. (a) calculate the final velocity after docking, in the frame of reference in which the first satellite was originally at rest.(b) what is the loss of kinetic energy in this inelastic collision? (c) repeat both parts, in the frame of reference in which the second satellite was originally at rest. final velocity(d) loss of kinetic energy = ?

What is reflection, what is refraction, and what is diffraction. what some similarities or differences between the three.