Unlock document.
This document is partially blurred.
Unlock all pages and 1 million more documents.
Get Access
Two men, Joel and Jerry, push against a wall. Jerry stops after 10 min, while Joel is able
to push for 5.0 min longer. Compare the work they do.
A) Joel does 75% more work than Jerry.
B) Joel does 50% more work than Jerry.
C) Jerry does 50% more work than Joel.
D) Joel does 25% more work than Jerry.
E) Neither of them do any work.
On a clear day, the sky appears to be more blue toward the zenith (overhead) than it
does toward the horizon. This occurs because
A) the atmosphere is denser higher up than it is at the earth's surface.
B) the temperature of the upper atmosphere is higher than it is at the earth's surface.
C) the sunlight travels over a longer path at the horizon, resulting in more absorption.
D) the atmosphere is more reddish over the ocean.
A 35 N-force toward the west is applied to an object. The object moves 20 m east
during the time the force is applied. What is the change in kinetic energy of the object?
A) 0.0 J
B) 0.57 J
C) 1.0 J
D) -700 J
E) 350 J
An electron has a wavelength of 0.123 nm. What is its energy in eV?
A) 80. keV
B) 20. keV
C) 40. keV
D) 10. keV
E) 60. keV
Find the Q value of the following reaction:
N + He → O + H
(14.003074 u) (4.002603) (16.999131 u) (1.007825 u)
A) -0.001279 u
B) -0.002179 u
C) -0.003479 u
D) -0.007219 u
E) -0.009721 u
When a 60-Hz voltage is applied to a 22-μF capacitor, the capacitive reactance is
A) 121 Ω.
B) 760 Ω.
C) 13 10-4 Ω.
D) 510 Ω.
E) 83 10-4 Ω.
A 2.0 kg mass moving to the East at a speed of 4.0 m/s collides head-on in an inelastic
collision with a stationary 2.0 kg mass. How much kinetic energy is lost during this
collision?
A) 4.0 J
B) 16. J
C) 8.0 J
D) 2.0 J
E) zero
An air conditioner with a coefficient of performance of 3.5 uses 30 kW of power. How
much power is it discharging to the outdoors?
A) 30 kW
B) 75 kW
C) 105 kW
D) 135 kW
E) 210 kW
David stands 2.5 meters in front of a plane mirror.
(a) How far from David is David's image in the mirror?
(b) If David moves away from the mirror at 1.5 m/s, how fast are David and his image
moving apart from each other?
(c) If David is 180. cm tall, how tall is his image in the mirror?
The acceleration of gravity on the moon is only one-sixth of that on Earth. If you hit a
baseball on the moon with the same effort (and at the speed and angle) that you would
on Earth, the ball would travel
A) one-sixth as far.
B) 36 times as far.
C) the same distance away.
D) 6 times as far.
E) as far.
A cyclotron operates at 10. MHz. What magnetic field is needed to accelerate protons?
A) 0.25 T
B) 0.25 Gauss
C) 0.12 T
D) 1.1 T
E) 0.66 T
A mirror with a focal length 20 cm has a 4.0 cm tall object placed 100 cm in front of it.
What is the height of the image?
A) 1.0 cm
B) 1.6 cm
C) -16 cm
D) -1.0 cm
E) 16 cm
A 3.0 Ω resistor is connected in parallel with a 6.0 Ω resistor. This combination is
connected in series with a 4.0 Ω resistor. The resistors are connected to a 12. volt
battery. How much power is dissipated in the 3.0 Ω resistor?
A) 12 W
B) 5.3 W
C) 7.7 W
D) 6 W
E) 2.7 W
Consider an atom with four accessible energy levels. What is the maximum number of
different wavelengths that could be emitted by such an atom?
A) 7
B) 4
C) 6
D) 5
E) 8
As a particle travels faster, its de Broglie wavelength
A) increases.
B) decreases.
C) remains constant.
D) could increase or decrease; it depends on other factors.
A player throws a football 50.0 m at 61.0 north of west. The westward component of
the displacement of the football thrown is given by
A) 64.7 m.
B) 24.2 m.
C) 74.0 m.
D) 0 m.
E) 55.0 m.
The specific heat of ice is about ________ the specific heat of liquid water.
A) the same as
B) half
C) double
D) one tenth
E) 3 times greater than
A double convex lens has faces of radii 18.0 cm and 20.0 cm. When an object is placed
24.0 cm from the lens, a real image is formed 32.0 cm from the lens. Determine:
(a) the focal length of the lens.
(b) the index of refraction of the lens material.
The statement that "heat energy cannot be completely transformed into work" is a
statement of which thermodynamic law?
A) fourth
B) zeroth
C) second
D) third
E) first
The statement that "the number of field lines passing through a surface is proportional
to the net charge enclosed" is known as
A) Franklin's Law.
B) The Law of Enclosure.
C) Coulomb's Law.
D) Gauss's Law.
E) Faraday's Law.
The radius of a typical nucleus is about 5.0 10-15 m. Assuming this to be the
uncertainty in the position of a proton in the nucleus, estimate the uncertainty in the
proton's energy (in eV).
A) 0.2 MeV
B) 0.4 MeV
C) 0.6 MeV
D) 0.8 MeV
E) 1.0 MeV
If a Cu2+ ion drops through a potential difference of 12. V, it will acquire a kinetic
energy (in the absence of friction) of
A) 12. eV.
B) 6.0 eV.
C) 24. eV.
D) 12. J.
E) 6.0 J.
The total mechanical energy of a system
A) can never be negative.
B) is equally divided between kinetic energy and potential energy.
C) is either all kinetic energy or all potential energy, at any one instant.
D) is constant only if conservative forces act.
E) is constant only if nonconservative forces act.
A handball of mass 0.10 kg, traveling horizontally at 25. m/s, strikes a wall and
rebounds at 19. m/s. What is the change in the momentum of the ball?
A) 4.4 N-s
B) 72 N-s
C) 1.2 N-s
D) 1.8 N-s
E) 5.4 N-s
James Clerk Maxwell presented the "complete" theory of electromagnetism as how
many equations?
A) 2
B) 3
C) 1
D) 5
E) 4
A heavy boy and a lightweight girl are balanced on a massless seesaw. If they both
move forward so that they are one-half their original distance from the pivot point, what
will happen to the seesaw?
A) The side the boy is sitting on will tilt downward.
B) Nothing, the seesaw will still be balanced.
C) The side the girl is sitting on will tilt downward.
D) It is impossible to say without knowing the masses of the children.
E) It is impossible to say without knowing the values of the original distances.
A single-slit experiment uses light of wavelength 720. nm with a slit separation of 0.250
mm and a screen placed 2.7 m away.
(a) What is the angular width of the central fringe?
(b) What is the linear width of the central fringe on the screen?
(c) What is the linear distance on the screen between the central maximum and the 1st
order maximum?
An aluminum foil 0.10 mm thick has how many aluminum atoms per square cm? (The
density of aluminum is 2.7 x 103 kg/m3 and the atomic mass of aluminum is 27.)
A) 6 x 1017
B) 6 x 1020
C) 6 x 1024
D) 6 x 109
E) 6 x 1030
A hydrogen atom is in the 6h state. How many electrons are allowed in this state?
A) 22
B) 18
C) 14
D) 10
E) 6
A 22-μF capacitor is connected across a 120 V (rms) 60 Hz source. What is the peak
current in this case?
A) 0
B) 1.0 A
C) 10.0 A
D) 0.10 A
E) 1.4 A
FIGURE 15-5
Fig. 15-5 shows four Gaussian surfaces surrounding a distribution of charges. Which
Gaussian surfaces have an electric flux of +q/o through them?
A) a.
B) b.
C) b and d.
D) b and c.
E) c.
FIGURE 2-5
Fig. 2-5 represents the velocity of a particle as it travels along the x-axis. In what
direction is the acceleration at t = 0.5 s?
A nearsighted person has a far point of 50. cm for one eye and 150. cm for the other.
What power contact lenses allow the person to see distant objects?
In references to nuclear chain reactions, what is meant by the term CRITICAL MASS?
What resistance added to 633. Ω in parallel would produce an equivalent 205. Ω?
An RC circuit consists of 2.0 MΩ in series with a capacitor. When connected to a
battery, the capacitor becomes 25% charged in 1.5 seconds. What is the capacitance
value?
Name 5 different type of waves or wave motion.
The diameter of the sun is 13.9 108 m, and the distance from the Earth to the sun is 1.5
1011 m. How long does it take for the sun to disappear after it touches the horizon?
Our second closest star, Alpha Centauri, is 4.0 lightyears distant. On a particular night,
it is located 37. up from the horizon, in a vertical plane. What are its x and y
coordinates in this plane?
Jennifer is inside her windowless space station laboratory and finds herself increasingly
pulled to the floor. What experiment can she perform inside the lab to decide if she is
feeling the effect of an acceleration or an effect of gravity?
The coefficient of linear expansion for aluminum is 24. x 10-6K-1. What is the
coefficient in units of C°-1?
If in Compton scattering of X-rays from a metal, the wavelength increases by 5% at an
angle of 60, what was the original wavelength before scattering?
What is the maximum angular magnification of a magnifying glass of focal length 10
cm? (Assume the near point is at 25 cm.)
FIGURE 4-6
A rope, tied between a motor and a crate, can pull the crate up a hill of ice (assume no
friction) at constant velocity, as shown in Fig. 4-6. The free-body diagram of the crate
should contain how many force(s)? Identify them.
As plant engineer, Donna purchases an electrical motor which has an output of 1500.
hp. If it requires 1.20 Megawatts of electricity, what is the efficiency of the motor?
Captain Rickard orders his starship to accelerate from rest at a rate of "1g" (accel = 9.8
m/s2). How long does it take the starship to reach one-tenth the speed of light if light
travels 300. megameters/s?
Why do large aperture telescopes use a mirror instead of a lens to focus light?
A long straight wire carrying 15. A is perpendicular to a 0.10 T field. Find the force per
meter on the wire.
A race car circles 10 times around an 8-km track in 20 min. What is its average speed
per lap?
State the principle of conservation of charge.
