Why is it important to describe both magnitude and direction of a quantity such as velocity

From what expression was the word radar derived

Which of the following is not a form of energy? a. light b. pressure c. heat d. electricity

What will happen when a ball rolls down a hill?

You measure the mass and speed of an object. Which quantity can you calculate?

Two charged objects have a repulsive force of. 80 N. If the charge of one of the objects is doubled, then what is the new force?

When a siren is approaching you, how does the wavelength of the waves reaching you compare to the actual wavelength that the siren emits?

In a harbor, you can see sea waves traveling around the edges of small stationary boats. Why does this happen?

Correct unit of speed

Technician A says that for best results, loosen the fastener immediately after spraying it with penetrating oil. Technician B says that rusted fasteners may be loosened by tapping with a hammer. Which technician is correct? a. technician A only b.

A roller coaster track is 3,000 meters long. It takes 100 seconds to travel once around the roller coaster. Is the velocity constant throughout the trip? Explain.