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While a car travels around a circular track at a constant speed, its
A) acceleration is zero.
B) velocity is zero.
C) inertia is zero.
D) none of the above
A beam of electrons can pass through a magnetic field without being deflected if the
direction of the beam is
A) parallel to the field lines.
B) perpendicular to the field lines.
C) none of these
The photons having greatest energy are those of
A) infrared.
B) red light.
C) green light.
D) blue light.
E) ultraviolet.
A helium-filled balloon released in the atmosphere will rise until
A) the pressure inside the balloon equals atmospheric pressure.
B) atmospheric pressure on the bottom and top of the balloon are equal.
C) the balloon and surrounding air have equal densities.
D) all of the above
E) none of the above
Fissioning carbon would occur with
A) absorption of energy.
B) release of energy.
C) neither of these
Compressions and rarefactions normally travel in
A) the same direction in a wave.
B) opposite directions in a wave.
C) right angles to the wave direction.
D) none of the above
Some of a wave's energy dissipates as heat. In time, this will reduce the wave's
A) speed.
B) wavelength.
C) amplitude.
D) frequency.
E) period.
Consider a moon that orbits one of our most distant planets in an elliptical path. The
distance that the moon covers each day is
A) greatest when closest to the planet.
B) greatest when farthest from the planet.
C) the same everywhere.
D) need more information
An 80-km/h airplane flying in the same direction as a 10 km/h tail wind has a
groundspeed of
A) 10 km/h.
B) 70 km/h.
C) 80 km/h.
D) 90 km/h.
Alpha particles are normally repelled by atomic nuclei because
A) their closeness with atomic nuclei violates quantum rules.
B) of oppositely-directed forces.
C) they both have the same sign of electric charge.
D) all of the above
E) none of the above
In which case would you have the largest mass of gold? If your chunk of gold weighed
1 N on the
A) Moon.
B) Earth.
C) planet Jupiter.
A spring is stretched 10 cm by a suspended 1-kg block. If two such springs side-by-side
are used to suspend the 1-kg block, each spring will then stretch
A) 5 cm.
B) 10 cm.
C) 20 cm.
D) 30 cm.
E) none of the above
Two billiard balls having the same mass and speed roll toward each other. What is their
combined momentum after they meet?
A) zero
B) half the sum of their original momentums
C) twice the sum of their original momentums
D) need more information
As soon as a bowling ball rolls off the edge of a table its horizontal component of
velocity
A) decreases.
B) remains constant.
C) increases.
A semiconductor can be
A) a conductor.
B) an insulator.
C) both of these
D) neither of these
Electrons fired in vintage TV tubes traveled at about 0.25 times the speed of light,
having more momentum and energy than would be required classically to get that
speed. Strictly speaking, this
A) increased your electric bill.
B) decreased your electric bill.
C) had no effect on your electric bill.
An empty jar is pushed open-side downward into water so that trapped air cannot
escape. As it is pushed deeper, the buoyant force on the jar
A) increases.
B) decreases.
C) increases, then decreases.
D) decreases, then increases.
E) remains the same.
Reports are that singer Caruso was able to shatter a crystal chandelier with his voice,
which illustrates
A) an echo.
B) sound refraction.
C) beats.
D) resonance.
E) interference.
Whenever the net force on an object is zero, its acceleration
A) may be less than zero.
B) is zero.
C) may be more than zero.
Superconductors are noted for their
A) high electric resistance.
B) low electric resistance.
C) absence of electric resistance.
D) low cost.
E) bright colors.
The current drawn by a 1200-W toaster connected to 120 V is 10 A. The resistance of
the toaster coils is
A) 6 ohms.
B) 12 ohms.
C) 18 ohms.
D) none of the above
An automobile and a golf cart traveling at the same speed collide head-on. The impact
force is
A) greater on the automobile.
B) greater on the golf cart.
C) the same for both.
If the speed of light in a sphere is 2 x 108 m/s, its index of refraction is
A) 0.50.
B) 0.67.
C) 1.0.
D) 1.5.
E) 2.0.
In perceiving its environment, a dolphin makes use of
A) echoes.
B) the Doppler effect.
C) ultrasound.
D) all of the above
E) none of the above
A step-up transformer steps up voltage by ten times. If voltage input is 120 volts,
voltage output is
A) 60 V.
B) 120 V.
C) 1200 V.
D) 12000 V.
E) none of the above
If you toss a coin straight upward in train that gains speed while the coin is in the air,
the coin will land
A) as if you were at rest.
B) in front of you.
C) in back of you.
A 10-N block and a 1-N block lie on a horizontal frictionless table. To impart equal
horizontal accelerations, we would have to push the heavier block with
A) an equal force.
B) 10 times as much force.
C) 10 squared or 100 times as much force.
D) 1/10 as much force.
E) none of the above
Which is the greater amount for medication measured by mass?
A) 1 gram
B) 1000 milligrams
C) both the same
When a load is placed on the middle of a horizontal beam supported at each end, the top
part of the beam undergoes
A) tension.
B) compression.
C) either of these
D) none of these
A definite method for losing weight is
A) exercise.
B) reduce Calorie intake.
C) maintain a low body temperature.
D) none of the above
According to relativity theory, you can experience a longer youth when you
A) are near a black hole.
B) are near a very large gravitational field.
C) travel at nearly the speed of light.
D) all of the above
E) none of the above
