Motion
What is the SI unit for acceleration?
M/s2
What factors determine the amount of gravitational force between 2 objects?
Mass and distance between the 2 objects.
What would you expect the electrical force between 2 objects to do as they move farther away?
Decrease
What is the SI unit for energy?
Joule
Conducting experiments and gathering data in the lab would be an example of which type of chemistry?
Pure Chemistry
What is the difference between speed and velocity?
They both measure distance covered over time. Velocity has a direction as well.
What SI unit is used to measure Force?
Newton
What is the formula for Ohm's law?
V=IR
What are the equations for KE and GPE?
KE=1/2mv2
GPE=mgh
Define matter.
Anything that has mass and occupies space
What is the equation for momentum?
P=MxV
What is the formula for calculating an objects Weight?
Fg=mxg
What is an insulator and give an example of a good insulating material.
Insulator=Dose not allow an electric charge to pass through.
Examples=Rubber, glass, plastic, wood
What is the difference between a simple and compound machine?
A simple machine does work with only one movement, a compound machine does 2 or more movements.
How can you tell the number of valence electrons an element has by looking at the periodic table?
Group number= # of valence electrons
Name 3 ways that influence an objects acceleration?
Speeding up, Slowing down, changing direction
What is Newtons 1st Law?
An object at rest will stay at rest unless acted on by an outside force= Law of Inertia
Define electrical current and give its SI unit.
Flow of electrons through a conductor
SI unit= Ampere
Why can a machine never be 100% efficient?
Friction, air resistance and heat loss among moving parts always results in some energy being lost.
What is it called when matter changes from a liquid to a gas?
Vaporization (or evaporation)
Solve for displacement: 5m north, 10m west, 5m north, 5m east.
11.2m
Name the 4 types of friction that were discussed in class.
Static, Sliding, Rolling, and Fluid
List and describe 4 components of a circuit.
Switch, conductor, load, power source and/or resistor.
What were the 3 types of potential energy discussed in class.
Elastic potential, chemical potential and gravitational potential
What is the formula and SI unit for density
D=m/v
SI unit=g/ml or g/cm3