Is force and charge directly proportional or inversely proportional?
They are directly proportional
What is used to prevent circuit overload in homes?
GFCI
What does a motor do?
changes electrical energy into mechanical energy
why does a siren change pitch as it passes you?
Because the frequency is wider therefore lower the farther away it is from you.
which electromagnetic wave has the highest frequency?
Radio waves has the highest frequency
When two charges are the same what will they do when they are neat each other?
(positive and positive),(negative and negative)
They will repel
power
How do you make a magnetic field stronger?
By adding more loops of a coil of wire in a solenoid
What is the Doppler effect?
A change in frequency or wavelength of a source due to the relative motion between the source and observer.
What is Diffraction?
A method in which waves can go through an opening, around a corner, or around an obstacle.
What are the charged parts of an atom?
Protons and Electrons
what does an insulator do?
block the flow of electricity
If an iron piece behaves like a magnet when near a magnet what is it called?
A temporary magnet.
What does frequency have to do with pitch?
Its directly proportional meaning frequency can determine pitch of sound.
Convex lenses focus light by...
Refraction
if a glass rod is rubbed with a silk cloth, will the rod gain or lose electrons?
It will loses electrons.
What does a parallel circuit do?
Electromagnet and paper clips beside a magnet, are both examples of...
A temporary magnet
What waves require a medium in order to travel?
Mechanical waves
What type of light is useful in killing bacteria but can be harmful to skin?
Ultraviolet light
What's the equation for Coulombs law and Newton's law of universal gravitation?
What is the current through a 75-ohms resistor if the potential difference across it is 12 volts?
using formula: v=ir. The answer is 0.16 A.
A magnetic probe is sixty millimeters south of a current-carrying wire. The induced field at that location is 1.20 G in the eastern direction (horizontal). The Earth's magnetic field at the location is 0.50 G in the northern direction (vertical). How strong is the total magnetic field measured by the probe?
1.30 G
Which wave has a lower frequency?
Wave 1
What's the formula for Snell's Law