Impulse Momentum
Force
Electricity
Heat
Waves
100
Units for Impulse
kg.m/s or N.s
100
what is inertia?
Things at rest tend to stay at rest.
Things in motion tend to stay in motion.
More mass means more inertia!
Does NOT depend on velocity
100
resistance (definition and units)
definition: slows down electric current
units: ohms (Ω)
100
high specific heat means…
temperature changes slowly, it takes more heat energy to heat it up the same number of degrees, it has more heat energy to give another substance
100
frequency (definition and units)
definition: how often a wave repeats in a second
units: Hertz
200
What is the relationship between force and time if impulse is constant?
The greater the force it takes to stop a moving object, the less time it takes to stop the object
The greater the time a moving object takes to come to a stop, the less the force acting to bring the object to a stop
200
What happens if net force = 0? (2 choices)
object stays at rest, OR
moves at a constant velocity (straight line)
200
current (definition and units)
definition: how fast electrons can travel
units: Amps (A)
200
What do molecules do at a higher temperature?
molecules move faster (more average KE)
200
wavelength (definition and units)
definition: the distance for one full cycle of a wave
units: meters
300
What happens to energy when a ball goes up and down?
The total energy (PE+KE) is conserved.
That means it stays the same.
300
What happens if there is an unbalanced net force?
acceleration
300
voltage (definition and units)
definition: what pushes electrons around a circuit
units: Volts (V)
300
Heat energy moves from ______ to ______ until equilibrium is reached
hot to cold
300
transverse wave (description and example)
a wave where the medium moves perpendicular to the wave direction
Examples: light, ocean waves
400
units for momentum
kg●m/s
400
What happens when one object exerts a force on another object?
The second object exerts an equal and opposite force on the first object.
400
In order to find the total current of a parallel circuit, you need to…..
Find the current in each branch using V=IR and then add them.
400
conduction (definition and example)
heat transfer when objects touch
example: ice cube in hand
400
longitudinal wave (description and example)
a wave with compressions that move parallel to the wave direction
Example: sound
500
What happens to momentum in a collision?
Momentum is conserved.
The total momentum before equals the total momentum after.
500
According to Coulomb’s Law, when does a strong force happen? A weak force?
Strong Force: When the charge is large and the distance between them is small
Weak Force: When the charge is small and the distance between them is large
500
In order to find the total current of a series circuit, you need to…..
Find the total resistance by adding all the resistances then using V=IR to find the current
500
convection (definition and example)
heat transfer with mixing of liquids or gases
example: lava in a lava lamp
500
the order of waves in the electromagnetic spectrum from longest wavelength to shortest
Radio -- longest
microwaves
infrared
visible light
ultraviolet
x-rays
gamma rays - shortest