All of the following were related to the invention of the telegraph except:

A. Thomas Edison

B. rail lines

C. Morse Code

D. Western Union

How does charging by conduction compare with charging by induction? A. A charged object is needed in conduction but not in induction. B. Two neutral objects are needed in conduction but not in induction. C.

What is the wavelength of a sound Wave moving at 340 mls with a Frequency of 256Hz?

How does the law of inertia relate to passengers on a train that is slowing down suddenly.

Humpty and Dumpty attempt a tug-of-war with a 16-meter-long rope standing on a smooth frictionless surface. Upon pulling the rope, how far will each one of them slide before they meet each other, if their mass is exactly the same?

A gas is collected over water at 20C in a eudiometer tube until the pressure is equilibrated with the atmospherica pressure. What is the preussre of the dry gas if the barometric pressure is 771?

Two sinusoidal waves are moving through a medium in the positive x-direction, both having amplitudes of 7.00 cm, a wave number of k=3.00m-1, an angular frequency of ω=2.50s-1, and a period of 6.00 s, but one has a phase shift of an angle ϕ=π12rad.

For a vacation, you and your family fly east to west from Boston, Massachusetts, to Seattle, Washington. You notice that your flight back home to Boston is shorter than your flight to Seattle. Which phenomenon causes your flight home to be shorter?

You spy on an anchor on the bottom of a lake. What is the direction and amount of force the water exerts on it: a) zero b) up, equal to the weight of the anchor. c) up, less than the weight of the anchor d) down, equal to the weight of the anchor.

How are electromagnetic waves different from matter waves?

A dc generator is the same as a (n) a. electric motor. b. ac generator. c. armature. d. electric current.