Electricy
Coulombs
What do the north and south poles do?
What property of a sound wave is directly related to its energy?
Its amplitude.
Gravity.
What is an ev a unity of?
Energy.
How do you find the total resistance in a series circuit?
Add all of the resistances together.
What do two north poles do?
They repel each other.
Why does the pitch of a siren sound higher as it approaches you and lower as it moves away, even though the siren emits a constant frequency?
The Doppler effect.
What does an unbalanced force cause?
Acceleration.
What are the units for power?
Joules/second.
What happens when a positively charged sphere touches a negatively charged sphere?
Electrons are transferred from the negative to the positive.
What direction do magnetic fields go?
North to South
What type of wave is light?
Transverse.
What is directly proportional to mass?
Inertia.
What is the energy of an eV equal to?
1.6*10^-19 J
How many coulombs are in a lightning bolt?
Ten.
What do moving charges create?
An eletric field.
What happens to a light wave's frequency and wavelength when its energy increases?
Frequency increases and wavelength decreases.
What direction does a satellite orbiting Earth accelerate in?
Towards the center.
What happens to kinetic energy when velocity increases?
It Increases.
Why do some objects function as insulators?
They have no free electrons.
What can the Earth act as? (Hint think in terms of its magnetism)
What two phenomena are shown when a wave passes through two slits?
Diffraction and interference.
What is the equilibriant?
The equilibrant force is equal in magnitude but opposite in direction to the resultant vector.
What happens to Mechanical energy when there is a free falling mass or a swinging pendulum? (when ignoring air friction)
It does not change.