John is traveling north at 20 meters/second and his friend Betty is traveling south at 20 meters/second. If north is the positive direction, what are John and Betty's speeds?

You have three identical resistors that you can connect in various ways. Which of the following is NOT a possible value of the equivalent resistance of the three-resistor combinations? A. 3RB. R/3 C. 2R/3D. 3R/2

What are the units for the spring constant

How much power does it take to lift a 4500kg elevator 25m up a shaft in 29s?

How is heat transferred through radiation? A. Through electromagnetic waves B. Through the motion of hot and cold liquid C. Through the rising of a warm gas D. Through the direct contact of particles

A motor that uses electrical energy at a rate of 1.5 kW is connected to a hydraulic lift that is used to lift a 1300 kg car to a height of 1.8 m in 24 s at a constant speed. Find the efficiency of the system consisting of the motor and the lift.

For which one of the following situations will the path length equal the magnitude of the displacement? a A ball on the end of a string is moving in a vertical circle. b A toy train is traveling around a circular track.

A poem on the body system

How many stars, approximately, are in the solar system?

The ends of a magnet where the force is strongest are magnetic

Which statement is equivalent to newtons first law