Unit 1
basic SI unit for length
meter
a prediction that can be tested by experimentation
hypothesis
Forces always occur in
pairs
The law that states energy is neither created nor destroyed
law of conservation of energy
Unit for resistance
ohm Ω
Ratio that has a value of one, and is used when setting up a unit conversion problem
conversion factor
any observation that can be repeated with the same results
scientific evidence
The momentum of an object depends on what two factors?
mass and velocity
SI unit of Energy and basic unit for Work
Joule
will electricity flow through an open circuit
no
method of using conversion factors and unit canceling to solve a unit conversion problem
dimensional analysis
acceleration in the negative direction
deceleration
the acceleration of an object as produced by a net force is directly proportional to the magnitude of the net force and inversely proportional to the mass of the object
newtons second law
What is the potential energy of a 83kg boulder about to fall off of a 196m cliff
159,426.4 J
if a circuit has multiple pathways, what type of circuit is it
parallel
the proper scientific notation for 0.000523
5.23 x 10-4
Calculate the speed of a truck that traveled 96mi in 1.5hours
64 mph
What is the force of a 39 kg object accelerating at 20m/s
780 N
What is the efficiency of a machine that does 85 J of output work for every 467 J of input work
18%
a battery is 28V and it has 4 bulbs, how much voltage does each bulb receive
7V
convert 35000 mm to km
0.035km
Calculate the acceleration of an object speeding up from 80m/s to 300m/s in 15s
14.67 m/s2
What would be the weight of an object with a mass of 873kg on Earth
8,555.4 N
What is the mechanical advantage of a simple machine that requires an input force of 56 N to produce an output force of 987 N
17.625
if a circuit has 8 bulbs with a resistance of 5 ohms each, what is the total resistance in the circuit
40 ohms