Use LEFT and RIGHT arrow keys to navigate between flashcards;
Use UP and DOWN arrow keys to flip the card;
H to show hint;
A reads text to speech;
63 Cards in this Set
- Front
- Back
What is a path that allows only one route for an electric current called?
|
series circuit
|
|
What is a circuit that has two or more branches for electrons to follow?
|
parallel circuit
|
|
What is the material through which electrons do NOT easily flow?
|
conductor
|
|
If the leaves of an electroscope spread apart, it indicates what?
|
the leaves of the electroscope have received a charge
|
|
What is the correct equation to show the relationship among power, current, and voltage?
|
P = I x V
|
|
What is the correct equation to calculate electrical energy?
|
E = P x t
|
|
What is a slanted surface used to raise an object called?
|
inclined plane
|
|
What is a bar that is free to pivot about a fixed point called?
|
lever
|
|
What is the machine called that has a inclined plane with one or two sloping sides?
|
wedge
|
|
What is a inclined plane that wraps around a cylindrical post?
|
screw
|
|
What is it called when two or more simple machines work together?
|
compound machine
|
|
What is an arrangement of pulleys designed to reduce the effort of force called?
|
block and tackle
|
|
What also increases when the kinetic energy of an object increases?
|
velocity
|
|
What happens to an objects potential energy when you increase the objects speed?
|
no affect
|
|
What is the equation used to calculate kinetic energy?
|
KE (J) = 1/2m(kg) x v2(m2/s2)
|
|
What is the equation used to calculate gravitational potential energy?
|
GPE(J) = m(kg) x 9.8m/s2xh(m)
|
|
According to the law of conservation of energy, what does the total amount of energy in the universe do?
|
remains constant
|
|
What is the upward force of an object falling through the air called?
|
air resistance
|
|
What is used to explain the relationship among mass, force and acceleration?
|
Newton's second law of motion
|
|
A feather will fall through the air more slowly than a brick due to what?
|
air resistance
|
|
In the absence of air, a penny and a feather that are dropped from the same height at the same time will do what?
|
fall at the same rate
|
|
What is the acceleration due to gravity?
|
9.8m/s2
|
|
What is the equation according to Newton's second law of motion?
|
F = m x a
|
|
When an object to moves in a circular path, what causes it to accelerates toward the center of the circle?
|
centripetal force
|
|
What is the path of a projectile?
|
curved
|
|
What does the size of a gravitational force of two objects depend on?
|
the mass and distance between them
|
|
What does the p represent in the equation p = m x v
|
momentum
|
|
What is the acceleration of an 25-kg object if the force is 300-N?
|
12 m/s2
|
|
What is the acceleration of an 200-kg object if the force is 3,000-N?
|
15 m/s2
|
|
Motion is a change in what?
|
position
|
|
What is the speed you read on your speedometer called?
|
instantaneous speed
|
|
What is the equation for the relationship among speed, distance and time?
|
s = d/t
|
|
What is the rate of change for acceleration?
|
velocity
|
|
What is your acceleration if your ride your bike up a hill, then ride down the other side?
|
first negative, then positive
|
|
What is the equation used to find acceleration?
|
Vf - Vi/t
|
|
What do inertia varies depend on?
|
mass
|
|
Newton's first law of motion is also called the law of?
|
inertia
|
|
What is a measurement standard defined as?
|
the exact quantity people agree to use for comparison
|
|
What is the SI unit that is used to measure time called?
|
second
|
|
What is the best type of graph used to show how some fixed quantity is broken down into parts?
|
circle graph
|
|
What is one benefit of the SI system?
|
it is based on multiples of ten
|
|
What is the process of gathering information through senses called?
|
observation
|
|
What is the first step in designing an experiment?
|
state the problem
|
|
What is a standard for comparison called that helps to ensure that the experimental result is caused by the conditon being tested?
|
control
|
|
What is a factor that does NOT change in an experiment called?
|
constant
|
|
What does the Cp represent in the heat formula?
|
specific heat
|
|
What does the Q represent in the heat formula?
|
heat gained or lost
|
|
What does the delta T in the heat formula stand for?
|
change in temperature
|
|
Work output of a machine divided by the work input
|
efficiency
|
|
Ratio of resistance force to effort force
|
mechanical advantage
|
|
Device that does work with only one movement
|
simple machine
|
|
The force you apply to a simple machine
|
effort force
|
|
Device made up of more than one simple machine
|
compound machine
|
|
Energy that is transferred by electromagnetic waves
|
radiation
|
|
The transfer of energy by direct contact of particles
|
conduction
|
|
The transfer of energy by particles in motion or currents
|
convection
|
|
Thermal energy that flows from a higher temperature to a lower temperature
|
heat
|
|
The amount of heat needed to raise the temperature of 1 kg of a material by 1 degree C
|
specific heat
|
|
The average kinetic energy of an object's atoms or molecules
|
temperature
|
|
A material that does not allow heat to flow through it easily
|
insulator
|
|
An engine that converts thermal energy into mechanical energy
|
heat engine
|
|
True or False
Winds are examples of convection currents |
True
|
|
True or False
Heat is a measure of the average kinetic energy of all the particles in an object |
False
|