Physic's Flashcards

Terms Definitions
cos45°
0.7
Atto
a -18
Luminous Intensity
Candela cd
Series ADD
R= R1+ R2
Magnification
m = -di/do = hi/ho
GPE stands for
Gravitational Potential Energy
Electric charge is always _____.
conserved
Weight
A force that measures the gravitational pull of an object, given by the object's mass times its gravitational acceleration (mg, where g is 9.8 m/s^2 as measured on Earth)
Spectral emission must match the film's spectral:
sensitivity
vector quantity
specify magnitude + directionvelocity, acceleration, force
To reduce or eliminate infectious organisms on an object?
Disinfection
anything that occupies space, has mass, and possesses the property of inertia
matter
CMa = Canis Major's alpha star is
Sirius
work is zero when force and displacement are
perpendicular
lever arm
perpendicular distance from axis of rotation to point where force is exerted
Physical Science
The study of matter and energy
 
(branches into chemistry and physics)
projectile
object shot thru air with indep. vertical and horizontal motions; after initial thrust, travels thru air only under the force of gravity
True or false. The active ingredient in fixer that halts the developing process is acteic acid
True
Distance has no effect on radiation quality T or F
T
a charged body confers the opposite charge on a neutral body that comes into its electrical field
induction
machine
makes tasks easier by changing the size or directions of the force
Terminal Velocity
Drag force equals the driving force (up and down)
angular acceleration
change in angular velocity divided by the time taken to make the change
interference
when two water waves come together to occupy the same space.
What is the equation for acceleration?
(Vf - Vo)/(T)
uniform circular motion
movement at constant speed around circle with fixed radius
The resistance an object has to change in its rotational state of motion is called rotational
inertia
The resistance an object has to change in its rotational state of motion is called rotational
Chapter 11 Rotational Mechanics
The average intensity during the entire PRP- both transmit and receive times
Temporal average intensity
When a gas is liquefied, is the pressure gauge an accurate measure of its contents?
No.
Kinetic Energy
From of energy associated with motion of a body
critical mass
the amount of a given fissionable material necessary to sustain a chain reaction at a constant rate
Paramagnetic Material
A material whose atoms have a net magnetic field; under conditions that allow the alignment of the individual magnetic fields, the material exhibits an attraction toward the pole of a magnet
Controlled Experiment
a test that is designed to include both an experimental group and a control group in which the scientist tests only one variable at a time
Accuracy
How close something is to a target or goal
 
(ex. archery)
Equilibrium
E(sigma) Fx = 0 E(sigma) Fy = [email protected] + [email protected] = 0T2 = [email protected] + [email protected] = [email protected] = W?smaller @ = bigger tension
In the absence of air resistance, the angle at which a thrown ball will go the farthest is
45 degrees
In the absence of air resistance, the angle at which a thrown ball will go the farthest is
Chapter 3 Projectile Motion
What happens to venous flow in the legs during inspiration?
It decreases
Batteries or Chemicals Cells
are devices that transform chemical energy into electrical energy, source of direct current that consist of 2 more cells
energy
power to do work, such as the capacity to move an object by the application of force
magnetic fields are created by:
1. moving charges2. currents in wires3. permanent magnets
About how many atoms would it take to deposit a single layer on a surface with an area of 3 cm2? (Assume the atom has a cross sectional area of A = 1 10-20 m2.)
3e16 atoms
A player catches a ball. Consider the action force to be athe impact of the ball against the player's glove. What is the reaction force:
glove against ball
The percentage of time that a system is transmitting a pulse? Units?
Duty factor. Unitless
further
at or to a great distance; a long way off; at or to a remote point:
How do scientists determine the workings of the universe?
By observing, making educated guesses, testing the guesses, and more observing, re-guessing, and more testing, etc. Definitions
What type of variable star is used to determine the distances to globular clusters?
RR Lyrae stars
if mas is increased from 20 mas to 40 mas the patient dose will
be doubled
Newton's Law of Universal Gravitation
law that states that every object in the universe attracts every other object with a force which is directly proportional to the produce of their masses and inversely proportional to the square of the distance between their centers (approximately true when the objects are massive and far apart, absolutely true when objects are point masses), formula: Fg=(G*m1*m2)/s^2 (right side of formula comes to N)
When a wrench is slid spinning over a frictionless tabletop, its center of gravity follows
A regular straight-line path
When a wrench is slid spinning over a frictionless tabletop, its center of gravity follows
Chapter 10 Center of Gravity
You have constructed an electromagnet. What would increase the number of clips picked up?
Increase the number of turns of wire
An object weighs 30 N on Earth. A second object weighs 30 N on the moon. Which has the greater mass?
the one on the moon
An object weighs 30 N on Earth. A second object weighs 30 N on the moon. Which has the greater mass?
Chapter 4
What moves when a current passes through a wire?
The electrons or the atoms that make up the wire.
-Matter and energy can not be created nor destroyed.-Matter and energy can be transformed from one state or form to another another.-Total matter and energy in universe is constant. What was, is now, and will forever be.
LAW OF CONSERVATION OF MATTER AND ENERGY
What happens at stage 1 of a new star being formed?
A nebula is formed, hydrogen and dust particles.
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