Magnetism
What is Magnetism?
a physical phenomenon produced by the motion of electric charge, resulting in attractive and repulsive forces between objects.
The distance traveled by a wave during a single period is__________.
one wavelength
What is the atomic mass of Oxygen?
15.999
Why is the sky blue?
Blue light is scattered in all directions by the tiny air molecules in Earth's atmosphere. Blue is scattered more than other colors because it travels as shorter, smaller waves.
Electrons flow in a wire when there is _______.
a potential difference across its ends.
The force that acts between a pair of magnetic poles depends on?
magnetic pole strength and separation distance.
what is an example of a longitudinal wave?
Sound
What is the element when the numbers of protons are 19?
Potassium
If mixing red and green what color do you get?
Yellow
The current in two identical light bulbs connected in series is 0.25 A. The voltage across both bulbs is 110 V. The resistance of a single light bulb?
220 ohms
Magnetic field lines about a current-carrying wire __________.
circle the wire in closed loops.
Some of a wave's energy dissipates as heat. In time, this will reduce the wave's
Amplitude
Where are electrons, protons, and neutrons located?
Proton and neutrons- Nucleus
Electrons-Orbital shells (outside the nucleus)
What color do you get mixing Red and blue?
Magenta
The voltage across a 10-ohm resistor carrying 5 A?
More then 20 V
Which force field can increase a moving electron's speed?
Electrical Field
Repeatedly dipping your fingers into water produces waves. Increasing the frequency of dipping makes waves that are ______.
Shorter
What is a molecule?
2 atoms bonded together
What do you get if you mix green and blue?
Cyan
A coulomb of charge flowing in a bulb filament powered by a 6-volt battery is provided with.
6 joules
Solar winds headed in Earth's direction are deviated mainly by __________.
Earth's magnetic field.
The number of nodes, including the end points, in a standing wave three wavelengths long, is _____.
7
What is an isotope?
When the number of protons is different than the number of neutrons.
What color do you get mixing green, blue, and red?
White
Heat a copper wire and its electric resistance
Increases