Which of the following is a scalar?

a. 45 hours

b. 2 km north

c. 1.5 miles up

d. 24.6° clockwise

Usable energy is lost each time energy is converted to another form of energy. true or false

under what circumstances can the average velocity of a moving object be zero when its average speed is 50 km/hr?

The biggest advantage to using radioisotopes over other forms of energy, such as coal, natural gas or petroleum is that.

In what way are the photoelectric effect and the double-slit experiment in conflict

Does calm water have a regular reflection or a diffuse reflection

Which of the following could be described as "Energy cannot be created or destroyed, only converted into other forms"? A. Rebound-crumple theorem B. Impulse-momentum theorem C. Law of conservation of energy D. Law of conservation of momentum

Which one of the following statements is true? 1. Burning coal contributes to sulfur aerosols in the stratosphere; these sulfur aerosols have moderated global warming. 2.

A diver on a diving board is undergoing simple harmonic motion. Her mass is 55.0 kg and the period of her motion is 0.800 s. The next diver is a male whose period of simple harmonic oscillation is 1.05 s.

Who was the last person to step on the moon?

The term wireless describe telecommunications in which electromagnetic waves carry a signal over a network. What describes the operation of wireless devices in a home or office using equipment connected to the Internet via specialized modems?