Measurements/Units/Motion(1D&2D)
Digits in a measurement that are valid.
What is significant figures?
The units of force.
What is newtons(N)?
Definition of momentum.
What is the product of an object's mass and velocity?
Units for work.
What is Joules(J)?
Possible charges for static electricity.
What is negative, neutral, and positive?
Refers to the degree of the exactness in a measurement.
What is precision?
When there is no net force on an object the object will...
What is remain at rest and move with constant velocity in a straight line(equilibrium)?
Letter for impulse.
What is J?
If force acts in direction other than motion what happens?
What is only the applied force does work since it acts in the direction of motion?
Compare an atom and an ion.
Atom- No charge (neutral), # of protons is equal to # of electrons
Ion- Charged, # of protons is not equal to # of electrons, # of protons is greater than # of electrons (object is positive), and # of electrons is greater than # of protons (object is negative)
The significant figures in 234 kg.
What is 2, 3, and 4?
The formula of universal gravitation.
What is Fg= G m1 m2 ________ r2
Two types of collisions. Explain.
What is elastic and inelastic?
Elastic- a collision in which BOTH momentum and kinetic energy are conserved.
Inelastic- a collision in which ONLY momentum is conserved.
Name what all these terms mean.
PE, KE, Q
What is potential energy, kinetic energy, and internal energy(heat)?
Responsible for maintaining the "potential difference".
What is a battery?
Names for the symbols k, M, G, and T.
What is kilo, mega, giga, and tera?
The two things force of attraction depends on.
What is mass of objects and distance between objects?
Finish these sentences.
If the speeds up...
If the object slows down...
What is momentum increases and momentum decreases?
If surface is friction-less what is all work converted to?
What is KE?
Name 4 factors that affect resistance in wires.
Explain each factor.
What is the length of the wire, cross sectional area, type of material (metal), and temperature.
Length of the wire- longer the wire, greater the resistance
Cross sectional area- thinner the wire, greater the resistance; thick wires provide less resistance
Type of material- not all metals provide the same resistance to electron flow
Temperature- greater the temperature, greater the resistance
Solve.
(5.98x10E23 kg)(7.4x10E22 kg)=
What is 4.4x10E46 kg^2?
Definition of a gravitational field.
What is the "space" around an object that is modified due to the presence(mass) of that object?
Name 4 examples of impulses.
What is egg toss competition, air bags during car accident, baseball/baseball bat, and golf club/golf ball?
Compare ideal machines and real machines.
At least 3 things.
Ideal Machine- No friction, work input=work output, 100% efficient, does not exist in real life
Real Machine- Has friction, work input is greater than work output, less than 100% efficient
Reason voltmeters are placed in parallel with circuit.
What is so that it may measure the difference in energy between those points?