A car travels 40 km in an hour. in the next two hours it travels 78 km. what is the average speed of the car?

What is the equation for time when using a position-time graph? and What is the equation for displacement when using a velocity-time graph?

Negative charges repel positive charges. a. true or b. false

The last stage of a rocket, which is traveling at a speed of 7700 m/s, consist of two parts that are clamped together: a rocket case with a mass of 250.0 kg and a payload capsule with a mass of 100.0 kg.

It takes 6400 years for one gram of radium to decay away to only 1/16 (one-sixteenth) of a gram. The half-life of radium is

All endothermic reactions absorb heat and make the surroundings warm a: true b: false

Forgetting takes place only in short-term memory.

What is the simplest relationship between the angular wavenumber k and just one of the other kinematic variables? Express your answer using only one of the other kinematic variables plus constants like π.

The pilot of an airplane notes that the compass indicates heading west. The airplane's speed relative to the air is 100 km/h. The air is moving in a wind at 25.0 km/h toward the north.

How do you get a resultant factor? A. Add two or more vectors B. Add two scalars C. Multiply two scalars D. Multiply two vectors

A panpipe is made of five pipes. The longest pipe is 25 centimeters long and the shortest is 5 centimeters long. Which of these pipe produces the highest-frequency sound and why?