Physics- Set 3 & 4 Flashcards
What is the scientific term for a change in velocity per unit time?
ACCELERATION
What is the most common term in physics for the product of mass
times velocity?
MOMENTUM
The amplitude of a sound wave most closely relates to its:
W) frequency
X) wavelength
Y) loudness
Z) overtones
Y) LOUDNESS
What property of a sound wave most directly determines the pitch of a
violin’s note?
FREQUENCY
Which of the following is the most common term for the general
type of wave that results from the vibration of a physical medium:
W) mechanical
X) electromagnetic
Y) perfect
Z) pulsed
W) MECHANICAL
Which of the following is LEAST accurate:
W) alpha particles are the same as helium nuclei
X) polarization of light supports the particle behavior of light
Y) a photon is a particle of light
Z) light slows down when it moves from a vacuum into glass
X) POLARIZATION OF LIGHT SUPPORTS THE PARTICLE BEHAVIOR OF
LIGHT
A circuit with 2 different resistors wired in series will have a total
resistance that is:
W) equal to the sum of the two resistances
X) less than either resistance
Y) equal to that of the greater resistance
Z) equal to that of the lesser resistance
W) EQUAL TO THE SUM OF THE TWO RESISTANCES
What is the most common isotope of carbon?
CARBON-12
If a car is going around a corner, which of the following statements
correctly describes the relationship among the speeds of the wheels on the car:
W) the wheels all rotate at the same speed
X) the wheels on the inside of the corner rotate faster because they have less distance to travel
Y) the wheels on the inside of the corner rotate faster because they have more distance to travel
Z) the wheels on the outside of the corner rotate faster because they have more distance to travel
Z) THE WHEELS ON THE OUTSIDE OF THE CORNER ROTATE FASTER
BECAUSE THEY HAVE MORE DISTANCE TO TRAVEL
How many kilometers will a mosquito travel in 9.5 hours if it moves in
a straight path with an average speed of 8 kilometers per hour?
76
Which of the following is the SI unit for the product of newtons and
meters:
W) henry
X) watt
Y) erg
Z) joule
Z) JOULE
In a gearing arrangement where a 10-tooth pinion drives a 40-tooth
gear, what is the gear ratio:
W) 1 to 4
X) 4 to 1
Y) 1 to 10
Z) 40 to 1
X) 4 TO 1
Giving your answer as north, south, east, or west relative to a point on
the Equator, in what direction is the Earth’s angular velocity as it rotates daily about its axis?
NORTH
Ignoring air resistance, wind velocity, and the rotation of the Earth,
if a projectile is fired directly upwards, the horizontal component of the projectile’s velocity:
W) is zero
X) remains a non zero constant
Y) continuously increases
Z) continuously decreases
W) IS ZERO
Neglecting air resistance, at what angle above the horizontal would
you aim your garden hose nozzle to obtain the greatest horizontal distance if the nozzle is at ground
level:
W) 0º
X) 30º
Y) 45º
Z) 60º
Y) 45º
Tim hears water dripping from a faucet while trying to take a nap. If
he counts 20 drops in one minute, what is the period of the drops, in seconds?
3
What is the SI unit given to a volt per ampere?
OHM
What is the current, in amperes, for a 3600-watt electric conveyor
operating on a 240-volt power source?
15
The slope of a velocity versus time graph represents:
W) acceleration
X) velocity
Y) position
Z) displacement
W) ACCELERATION
Stories have been told about opera singers breaking crystal glass by
singing a certain tone loud enough. What is the most common term for the property that would
account for this happening?
RESONANCE
Under which of the following conditions is the average velocity
equal to the average of an object’s initial and final velocity:
W) always
X) never
Y) only when the acceleration changes
Z) only when the acceleration is constant
Z) ONLY WHEN THE ACCELERATION IS CONSTANT
What is the wavelength, in meters, of a sound wave that has a
frequency of 600 hertz and a speed in a certain medium of 360 meters per second?
0.6
The area under the curve of a velocity versus time graph
represents:
W) acceleration
X) velocity
Y) displacement
Z) position
Y) DISPLACEMENT
Which of the following is NOT true:
W) a spring scale can be used to indirectly measure acceleration
X) momentum is a vector
Y) impulse is a vector
Z) a change in direction of an object’s motion cannot affect its momentum
Z) A CHANGE IN DIRECTION OF AN OBJECT’S MOTION CANNOT AFFECT
ITS MOMENTUM
What is the mass, in kilograms, of a 5-kilogram rock on a planet with
a gravitational acceleration one-half that of the Earth’s?
5
What is the specific gravity, to the first decimal place, of a cubic foot
of metal that has a density of 188 pounds per cubic foot if water has a density of 62.4 pounds per
cubic foot?
3.0
For a given time interval, when is the average velocity of an object
equal to the instantaneous velocity for every time in the interval:
W) never
X) always
Y) only when the velocity is changing at a constant rate
Z) only when the velocity is constant
Z) ONLY WHEN THE VELOCITY IS CONSTANT
In a tug-of-war, each person on a team pulls with an average force
of 500 newtons. What is the tension in the center of the rope if there are 10-man teams on each side:
W) 0 newtons
X) 2,500 newtons
Y) 5,000 newtons
Z) 10,000 newtons
Y) 5,000 NEWTONS
What are typically given as the two parameters of a velocity vector?
MAGNITUDE AND DIRECTION
Which of the following conditions must be true for Hooke’s law to
apply:
W) the spring must be within its proportional elastic limit
X) the spring must me made of cold formed steel coils
Y) the deflection of the spring must be less than one tenth the spring’s free length
Z) the carbon content of the metal must be over 0.023 percent
W) THE SPRING MUST BE WITHIN ITS PROPORTIONAL ELASTIC LIMIT
Which one of the following 5 colors of light has the LEAST angle of
refraction in normal glass: blue; green; orange; yellow; red
RED
For a standing wave on a guitar string, the first overtone represents
what harmonic?
SECOND
At normal operating speed for a motor vehicle, how many times as
much kinetic energy does a car have if its velocity is doubled?
4 TIMES
Relative to the floor, what is the gravitational potential energy, in
joules, of a 25-newton bag of beans on a shelf 5 meters above the floor?
125
What color of light is produced when equal intensities of cyan light
and red light are combined?
WHITE
What is the resistance, in ohms, for an electric stove that draws 24
amps on a 240-volt circuit?
10
Which of the following colors of light would give the highest
resolving power of a compound light microscope:
W) infrared
X) orange
Y) green
Z) ultraviolet
Z) ULTRAVIOLET
If Jim expends 200 watts of power to vertically lift a 200-newton rock
3 meters high, how many seconds did it take him to lift the boulder?
3
Which of the following is NOT a composite material:
W) bone
X) plywood
Y) wood
Z) mild steel
Z) MILD STEEL
If a 5,000-pound elephant is on one end of a plank at a distance of 5
feet from the pivot point and a 200-pound man is on the other end at a distance of 15 feet from the
pivot, what will the available torque be, in foot-pounds, at the pivot while the plank is in motion?
22,000
In an application where ductility is required, which of the
following materials would be your BEST choice:
W) grey cast iron
X) copper
Y) granite
Z) 1040 steel
X) COPPER
Which of the following statements is NOT correct:
W) percent elongation compared to the known value for a material is sometimes used to detect
impurities in metal
X) the modulus of elasticity for a material is derived from its stress-strain curve
Y) ductile materials usually fail with little or no plastic deformation
Z) a steel sample that is loaded beyond its elastic limit will not return to its original shape when the
load is removed
Y) DUCTILE MATERIALS USUALLY FAIL WITH LITTLE OR NO PLASTIC
DEFORMATION
Which of the following have largely replaced vacuum tubes that
were used in electronics of the mid to later 20th century:
W) capacitors
X) transformers
Y) transistors
Z) amplifiers
Y) TRANSISTORS