Test 5
radiation
What is a parallel circuit?
A circuit where electricity flows along more than one pathway
The force weakens
Which category of wave does NOT flow through a vacuum?
a mechanical wave
What is it called when a wave bends when entering a new medium at an angle?
refraction
When water circulates in a pot with warm water rising and cooler water sinking, what type of heat transfer is this?
Convection
What is a series circuit?
A circuit where there is only one pathway for electricity to flow
At what location is Earth's magnetic field the strongest?
at the north and south poles
*Which part of the below statement is wrong?
Transverse and longitudinal waves both more energy and matter through a medium.
Matter does not move
Which waves have the longest wavelengths in the electromagnetic spectrum?
radio waves
When electric current flows through the metal filament of a lightbulb, electrical energy is converted to what other two forms?
heat and light energy
What happens when one bulb burns out in a series circuit?
Any remaining bulbs will not be lit and the circut will not continue
In what direction does electricity flow?
from negative to positive
Which wave causes the medium to vibrate only in a direction parallel to the wave's motion?
a longitudinal wave
When a police siren sound changes as it approaches you and then moves away, what is this called?
the Doppler effect
Why is there no change in temperature once thermal equilibrium is reached between two objects in contact with each other?
Heat does not flow between objects in contact at the same temperature
Why are most electrical wires covered with plastic or rubber?
Plastic and rubber are both very good insulators. They do not conduct electiricty well.
If voltage is 10 and resistance is 2 ohms, what is the current?
5.0 amps
The length of time it takes for one complete wavelength to pass a fixed point is known as...
a period
The bottom of a transverse wave is called what?
a trough
In which direction does heat flow: from cold to hot, or from hot to cold?
Heat flows from hot to cold
What you add to a circuit to decrease the voltage?
Add a resistor
If voltage is 80 and current is 2.8 amps, what is the resistance?
28.6 ohms
When a wave strikes a barrier and bounds backwards, what is this behavior called?
reflection
2 meters