Which of the following is not a vector quantity?

A) Speed

B) velocity

C) acceleration

D) all are vector quantities

A horizontal force of magnitude 30.2 N pushes a block of mass 3.50 kg across a floor where the coefficient of kinetic friction is 0.646.

The component of a refrigeration system which changes a high pressure vapor to a high pressure liquid is the:

Mirror neurons may assist in making observational learning possible.

Which of the following is the only requirement for an object to be projectile motion? A. The object must have a nonzero vertical acceleration. B. Gravity must be the only force acting on the object. C. The horizontal velocity must be constant. D.

How do you find the highest occupied energy level in an element?

The mass of the Sun is 1.99 * 1030 kg. Jupiter is 7.79 * 108 km away from the Sun and has a mass of 1.90 * 1027 kg. The gravitational force between the Sun and Jupiter to three significant figures is * 1023 N.

You measure the magnetic field of a long, current-carrying wire to be B is equal to start fraction 50 times mu naught over pi end fraction at a distance of r = 7.5 cm. How much current is running through the wire?

In any food chain or web, the original source of energy is

Which organisms develop gills from pharyngeal arches and later develop lungs to breathe on land

How much energy (in joules) is required to evaporate 0.0005 kg of liquid ammonia to vapor at the same temperature?