Forces
What is a net force?
s = d/t
s= speed
d= distance travelled (miles)
t= time (hour)
Equation for finding speed
Energy cannot be ______ or destroyed, only ______ from one from to another
Created
Transformed
The ability of a substance to conduct electricity
What is conductivity?
T or F
Particles move fastest in gas and slowest in solids
True
The force that air pushes against a moving object
What is air resistance?
An object at rest will stay at rest, an object in motion will stay in motion
What is first law of motion?
Magnetic
Chemical
Thermal
Light
Nuclear
Two or more elements chemically combined
What is a compound?
Temperature changes during a phase change
False
Force = mass x acceleration
6-kg object accelerating at 18m/sec
108N
a) .5 hours
b) 2 hours
c) 1 hour
Can energy be destroyed?
NO
Formula for finding density
D = m/v
What activity is an example of chemical change?
a) dissolving sugar in water
b) melting silver to make silverware
c) burning wood to produce ashes
A student pushes against a car with a force of 13 newtons (N). The car does not move. What is the amount of force exerted by the car on the student?
a) 0 N
b) 13 N
c) 26 N
Describe the motion of a person not wearing a seatbelt if the car suddenly stops.
The car will stop and the person will keep moving forward because of inertia
The transfer of heat energy through a SOLID
The transfer of heat energy through a LIQUID or GAS
Conduction
Convection
Does density change?
A chemical change results from what?
A physical change is when ____ changes ____ but not chemical identity
NO
A chemical reaction
matter, form
What type of energy in gasoline is transformed into mechanical energy in a motorcycle engine?
Chemical
Where does Miss. Esposito go to college?
Nazareth College