Who invented the telephone?

Thomas Edison

the Wright brothers

Alexander Graham Bell

Henry Ford

Which of the following is an example of conduction? a: solar energy warming a room b:heat rising from the coils of the stove c: hot air drying a wet towel d: heat moving from a clothes iron to a shirt

Why is a transistor classified as a semiconductor? It behaves like a switch in a circuit. It conducts electricity in a circuit. It has controlled impurities to vary its conductivity. It increases the amplitude of an applied signal.

What happens to an object if heat is added to it

Exposure to what type of radiant energy is sensed by human skin as warmth? x-rays ultraviolet infrared gamma rays

Which is the best example of forces acting in the same direction? a boy lifting his chest off the ground during a pushup two football players pushing a tackling sled a person pulling out a garden hose from its reel two dogs playing tug-of-war with a

A sprinter runs 200m west and 100 m east her displacement is

What is the relation of the sign of the charge on the charging body to the sign of the charge on the charged body when the charging is by contact

Example of a colloid?

At what temperature does gasoline freeze

A closed, rigid tank contains Refrigerant 134a initially at 100°C. The refrigerant is cooled until it becomes saturated vapor at 20°C. Kinetic and potential energy effects can be ignored.