The difference between scalar and vector

How long human can live inside the water without oxygen?

A student needs to use the metric system while measuring the length of a box. Which units should he use?

A variable vane turbocharger allows for elimination of the A. exhaust cooler. B. turbocharger wastegate. C. diesel oxygen sensor. D. intake air cooler.

According to kinetic molecular theory, which statement best describes collisions between gas particles? A. They are elastic. B. They are predictable. C. They decrease the particles' energy. D. They cause the particles to stick together.

The same ball is shot straight up a second time from the same gun, but this time the spring is compressed only half as far before firing. How far up does the ball go this time? Neglect friction.

The engine that powers a crane burns fuel at a temperature of 1500 oC. It is cooled by air at a temperature of 20 oC. The crane is used to lift a 1000 kg steel girder 30 m into the air.

The portion of a light ray that falls on a surface is a/an

Give the definition for diffusion. (A) gas molecules mix unequally average distance between collisions (B) gas molecules escape from a container into a vacuum through a small hole (C) gas molecules mix equally (D) gas molecules spread out in a

As resistance goes up, what happens to the current?

1. A 0.828-nm photon collides with a stationary electron. After the collision, the electron moves forward and the photon recoils backwards. a) Find the momentum of the electron. b) Find the kinetic energy of the electron.