A 10N force and a 50N force act in opposite directions on a 4 kg object. What is the acceleration? (how did you do it)

A star that is moving away from an observer has its visible light shifted toward which end of the spectrum? A. blue B. red C. yellow D. white

A 3.0-kg cart is rolling across a frictionless, horizontal track toward a 1.3-kg cart that is held initially at rest. The carts are loaded with strong magnets that cause them to attract one another. Thus, the speed of each cart increases.

What best describes the direction of the electric field on a spherical equipotential surface?

Color depends on what characteristic of light? a) its frequency b) its amplitude c) both of these

A skydiver jumps out of a plane. A moment later, the skydiver feels considerable air resistance pushing against her but she is still accelerating downwards.

Which describes a property shared by ultraviolet light and X-rays? A They are both transverse waves. B They share the same wavelength. C They contain less energy than visible light. D They both require a medium to travel through.

What is the potential energy called that is associated with objects that can be stretched

Which of the following is not a current use of radioisotopes? medical diagnosis sterilization of equipment detection of leaks in building structures light fixtures

A Blu-ray disc is approximately 11 centimeters in diameter. The drive motor of a Blu-ray player is able to rotate up to 10,000 revolutions per minute. (a) Find the maximum angular speed (in radians per second) of a Blu-ray disc as it rotates

A body has translatory motion if it moves along a