Regents Flashcards
which pair of quantities represent scalar (direction doesn’t matter) quantities?
energy and time
which pair of quantities represent vector (direction does matter) quantities?
displacement and velocity
A ball is thrown straight up from the surface of Earth. Which statement best describes the ball’s velocity and acceleration at the top of it’s flight?
Velocity is 0
Acceleration is nonzero (9.8)
A student runs a plastic comb through her hair, the comb acquires a negative charge. This charge results from the transfer of
electrons from the hair to the comb
protons never move
How would the mass and the weight on the moon compare to the mass and the weight on Earth
Mass would be the same but weight would be different
AN object is moving w/ constant speed in a circular path. The object’s centripetal accelerations remains constant in
Magnitude, only
Magnitude means speed
when pulling a string diagonally - which way is it actually being exerted?
what mode does calculator have to be in?
horizontal = cos
degree
Tip: Don’t assume that every # given
is needed
As a student walks down hill at constant speed, his gravitation potential energy
decreases and kinetic energy remains the same
Resistance is proportionate to ______
Halving the _____ Halves the Resistance
Length
In an opening electrical circuit, the source of potential difference is
battery
which way do the North Side arrows point
South
1) OUt
2) IN
A student claps his hands once to produce a sudden loud sound that travels through the air.
This sound is classified as a
longitudinal mechanical wave
A STUDENT GENERATES WATER WAVES IN A POOL of water.
In order to increase the energy carried by the waves, the student should generate waves w/
greater amplitude
As frequency increases what will decrease
wavelength
angle of reflection or reaction I always respect to what
normal line
what characteristic of the wave can not change as the wave enters the second medium
frequency
the Doppler effect is best described as the
shift in the observed frequency and wavelength of a wave caused by the relative motion btwn the wave’s source and an observer
if there is a picture of a rod what is the dotted line
reflection
which type of forces exist btwn the two protons in a helium nucleus
What’s repulsive
What’s attractive
repulsive electrostatic force
and attractive strong nuclear force
if it mentions benson or other weird words where to look (most likely)
classification of matter
if it asks about an excited mercury of hydrogen number in the energy level (any letter)
where to look
energy level diagrams
electron =
negative
internal energy
friction
charged objects can
attract and repel neutral objects
microwaves can have a wavelength closet to
length of a physics students thumb
which combo correctly Pais a vector quantity with its corresponding unit
vector - m/s
how does inertia change
all based on mass
more mass = more inertia
less mass = less inertia
which change would have resulted in a greater time of flight for the projectile
increasing the height to 2h
mg cos =
push you into hill
mg sin =
dragging u down the hill
as a toy car moved in a clock wise horizontal circular path at a constant speed where is acceleration and velocity (which way are arrows pointing)
V = up A = towards center
which forces can either be attractive or repulsive
magnetic and electrostatic
longer wire =
thinner wire=
More resistance
Less
work per unit charge required to move a charge btwn two points in an electric circuit defines electric
potential diff
a light wave can travel through
both water and vacuum
resonance
two or more things that work simetanuosly to produce max sound
which characteristics of a light wave remain constant when the light waves travels from air into corn oil
period and frequency
the spreading out of a wave after passing through an opening in a barrier is an ex of
diffraction
after two light waves have interfered in a vacuum the two waves will be
changed in amp
out of phase
not in sync
A unit used for a vector quantity is
Newton
If an object is in equilibrium
Acceleration always has to be
Zero
Which statement describes the gravitation force and the electrostatic force between two charged particles
The gravitation force MUST be attractive
Whereas the electrostatic force may be either attractive or repulsive
An electrostatic force exists between two \+3.20x10^-19 coulomb point charges separated by a distance of .03 meter As the distance between the two point charges is decreased, the electrostatic force of
Repulsion between the two charges
increases
Frequency is
WAVES/SECONDS
If a metal conducts better electricity than what must the resistance be
Less
When only one lightbulb blows out, an entire string of decorative lights goes out. The lights in this string must be connected in
Series with one current pathway
When a wave travels through a medium, the wave transfers
Only energy
Glass may shatter when exposed to sound of a particular frequency.
This phenomenon is an ex of
Resonance
Which waves require a material medium for transmission
Sound waves = air
What will charges objects produce
Electric and magnetic fields
When an isolated conductor is placed in the vicinity of a positive charge, the conductor is attracted to the charge. The charge of the conductor
Could be neutral or negative
When the sound is coming to you
What happens to the frequency and wave length
Higher frequency
Shorter wavelength
How many quarks do protons and neutrons have
3 quarks
Charge of porton
Electron
Neutron
+1
-1
0
What fundamental interaction is responsible for binding together the protons and neutrons in a helium nucleus
Strong nuclear force
Why the lightning strike is seen b4 thunder is heard
Light travels faster than sound
If another resistors would be added in a parallel circuit
What would happen to the current through the first resistor
Stay the same
How to measure with protractor
Center protractor
And subtract what you have with 90
How many ft in 1 meter
3 feet
What does 180° rep
What happens if one is going west but presses the brakes
It means opposite
The direction will become east because brakes act in opposition
Units for impulse
N/S
