A gas is confined to a rigid container that cannot expand as heat energy is added to it.
This process is
A) isothermal.
B) isometric.
C) isobaric.
D) isentropic.
E) adiabatic.
A 0.67 μF parallel plate capacitor has air between the plates with a separation of 0.33
mm.
(a) What is the plate area?
(b) What charge is on the plates when connected to a 3.0 volt battery?
In Young’s two-slit experiment, the distance between the slits and the screen is 1.10 m
and the distance between the slits is 0.0400 mm. If the second order bright fringe is
measured to be 4.20 cm from the centerline, what is the wavelength of light?
A) 200 nm
B) 381 nm
C) 401 nm
D) 620 nm
E) 763 nm
Which uranium isotope has the largest cross section for slow neutrons?
A) U-236
B) U-238
C) U-237
D) U-235
E) U-239
The work energy theorem says
A) the net work done is equal to the initial kinetic energy less the final energy.
B) the net work done plus the final kinetic energy is the initial kinetic energy.
C) the net work done plus the initial kinetic energy is the final kinetic energy.
D) the net work done minus the initial kinetic energy is the final kinetic energy.
E) final kinetic energy plus the net work done is the initial kinetic energy.
A 6-Ω resistor, an 8-Ω resistor, and a 24-Ω resistor are connected together. What is the
minimum resistance that can be produced using all three resistors?
A) 4 Ω
B) (1/24) Ω
C) 3 Ω
D) (1/6) Ω
E) 7 Ω
A 4.0 MΩ resistor is connected in series with a 0.5 μF capacitor. The capacitor is
initially uncharged. The RC combination is charged by a 9.0 V battery. What is the
change in voltage between t = RC and t = 3RC?
A) 7.59 V
B) 11.4 V
C) 8.81 V
D) 2.88 V
E) 5.70 V
If the net work done on an object is positive, then the object’s kinetic energy
A) decreases.
B) remains the same.
C) increases.
D) is zero.
E) cannot be determined without knowing the object’s mass.
A 22-A current flows into a parallel combination of 4.0 Ω, 6.0 Ω, and 12 Ω resistors.
(a) What current flows through the 12-Ω resistor?
(b) What current flows through the 6.0-Ω resistor?
(c) What current flows through the 4.0-Ω resistor?
The focal length of a concave mirror is 20 cm. What is its radius of curvature?
A) 10 cm
B) 40 cm
C) -40 cm
D) 20 cm
E) -20 cm
Three identical resistors are connected in series to a battery. If the current of 12 A flows
from the battery, how much current flows through any one of the resistors?
A) 12 A
B) 36 A
C) 4 A
D) 24 A
E) 6. A
You try to pull an object by tugging on a rope attached to the object with a force .
The object does not move at all. What does this imply?
A) There are no other forces acting on the object.
B) The inertia of the object prevents it from accelerating.
C) The object has reached its natural state of rest and can no longer be set into motion.
D) The rope is not transmitting the force to the object.
E) There are also one or more other forces that act on the object with a sum – .
A bolt hole in a brass plate has a diameter of 1.2 cm at 20.°C. What is the diameter of
the hole when the plate is heated to 220.°C? (The coefficient of linear thermal
expansion for brass is 19 x 10-6 per degree °C.)
A) 1.205 cm
B) 1.210 cm
C) 1.195 cm
D) 1.190 cm
E) 1.200 cm
On a plot of F vs. x, what represents the work done by the force F?
A) the slope of the curve
B) the length of the curve
C) the area under the curve
D) the product of the maximum force times the maximum x
E) the maximum F times minimum x
Consider point charges of +Q and +4Q, which are separated by 3 m. At what point, on a
line between the two charges, would it be possible to place a charge of -Q such that the
electrostatic force acting on it would be zero?
A) 3/5 m from the +Q charge
B) 1 m from the +Q charge
C) 1 m from the +4 charge
D) 3 m from the +4 charge
E) There is no such point possible.
The flywheel of a machine is rotating at 126 rad/s. Through what angle will the wheel
be displaced from its original position after 6.0 s?
A) 21. radians
B) 7.3 102 radians
C) 1.2 102
D) 0.32 revolutions
E) 7.3 10-2 revolutions
If the hydrogen atom is in an n = 3, ℓ =2 state, what is a possible value for ℓ after a
photon is emitted?
A) 3
B) 0
C) 4
D) 2
E) 1
What happens to a simple pendulum’s frequency if both its length and mass are
increased?
A) It remains constant.
B) It decreases.
C) It increases.
D) It could remain constant, increase, or decrease; it depends on the mass to length ratio
(mass density).
A 50. cm diameter wheel is rotating initially at 2.0 revolutions per second. It slows
down uniformly and comes to rest in 15 seconds.
(a) What was its angular acceleration?
(b) Through how many revolutions did it turn in those 15 s?
If a constant net torque is applied to an object, that object will
A) rotate with constant linear velocity.
B) rotate with constant angular velocity.
C) rotate with constant angular acceleration.
D) having an increasing moment of inertia.
E) having a decreasing moment of inertia.
A rad is
A) a dosage of 2.58 x 10-4 C/kg.
B) 10-2 J/kg.
C) the SI unit of radioactivity ( = 1 decay/s).
D) the SI unit of absorbed dose = 1 J/kg = 100 rad.
E) 3.70 x 1010 decays/s in radium.
A 2.0 kg softball is pitched to you at 20. m/s. You hit the ball back along the same path,
and at the same speed. If the bat was in contact with the ball for 0.10 s, the average
force the bat exerted was
A) 0.40 kN.
B) 40. N.
C) zero.
D) 0.80 kN.
E) 0.65 kN.
A Carnot cycle is operated in reverse as a refrigerator taking in 36. J every minute and
“dumping” 40. J per minute at a room temperature of 23.°C. The net entropy increase
per minute is
A) 0.13 J/K
B) 36.J/K
C) 0.15 J/K
D) zero
E) 0.15 kJ/K
If you double the absolute temperature of an object, it will radiate energy
A) 16 times faster.
B) 4 times faster.
C) 32. times faster.
D) 8 times faster.
E) 2 times faster.
What condition or conditions is/are necessary for static equilibrium?
A) ΣFy = 0
B) ΣFx = 0, ΣFy = 0
C) Στ = 0
D) ΣFx = 0
E) ΣFx = 0, ΣFy = 0, Στ = 0
When temperature is plotted against entropy, the area under the process path is equal to
A) the work done.
B) the heat transferred.
C) the change in internal energy.
D) the heat added less the work done.
An ideal transformer steps down 120. volts to 12. volts and the 2630. turn secondary
supplies 12. Amperes.
(a) Determine the current in the primary.
(b) Determine the turns ratio.
(c) What is the ratio of output power to input power?
The area under the curve, on a Force-position (F-x) graph, represents
A) work.
B) efficiency.
C) kinetic energy.
D) power.
E) friction.
Consider a merry-go-round which makes 20. revolutions in 4.0 minutes.
(a) What is the average angular speed in radians/s?
(b) For a child 3.5 m from the center, how far does he travel in the 4.0 minutes?
The surface temperature of the star is 6000 K. What is the wavelength associated with
the light emitted by this star?
A) 483 nm
B) 907 nm
C) 311 nm
D) 492 nm
E) 502 nm
When subtracting several quantities, the number of decimal places in the result must
always be
A) larger than the number of decimal places in the most accurate of the quantities.
B) equal to the number of decimal places in the most accurate of the quantities.
C) equal to the average number of significant digits in the most and least accurate of the
quantities.
D) equal to the number of decimal places in the least accurate of the quantities.
E) smaller than the number of decimal places in the least accurate of the quantities.
The driver of a motorboat that can move at 10 m/s wishes to travel directly across a
narrow strait in which the current flows at 5 m/s.
(a) At what angle upstream should the driver head the boat?
(b) How long will it take to cross a distance of 1.6 km?