The angle a vector makes with the x-axis of a coordinate system must be what size in order to make one or more of its components negative?

Which one of the following light bulb produces lowest lumens per watt? A) Incandescent B) Fluorescent C) Compact fluorescent light D) Low pressure sodium

Two cars collide head on while each is traveling at 90 km/hkm/h. Suppose all their kinetic energy is transformed into the thermal energy of the wrecks. What is the temperature increase of each car?

Explain how the existence of isotopes is related to atomic masses not being whole numbers

3. A 1576 kg car moving south at 32 m/s is struck by a 1837 kg car moving north at 33 m/s. The cars stick together in a perfect inelastic collision. How fast and in what direction do they move immediately after the collision?

When you boil water in a pot on the stove, which heats faster, the metal or the water

Physical science unit 4 lesson 10

When light travels from air into water which is more dense than the air, it's speed is lower. So the light wave will ... A. bend towards the normal to the surface B.-always lies along the normal to the surface C. be unaffected D.

How will the current change in a series circuit if more resistors are added to it?

The motor, M, pulls on the cable with a force F = (10t2 + 300) N, where t is in seconds. If the 100 kg crate is originally at rest at t = 0, determine its speed when t = 4 s.

What happens to the acceleration of an object is its mass doubles?