My 5.0 hp mower would be equivalent to an electric mower rated at what power?
A) 2.8 W
B) 0.25 KW
C) 2.8 KW
D) 3.7 KW
E) 0.78 KW
The word LASER is an acronym for
A) Light Altered Spectra of Energy Radiated.
B) LAtent Source of Enhanced Radiation.
C) Light Amplification by the Stimulated Emission of Radiation.
D) Light Absorbed States of Energetic Resonance.
How much energy would be required to accelerate a 77. kg professor from rest to 90%
the speed of light?
A) 2.3 mc2
B) 0.30 m c2
C) 1.3 m c2
D) 0.41 m c2
E) 0.50 m c2
When an electron is removed from a neutral atom, it becomes
A) a positive ion.
B) a negative ion.
C) heavier.
D) a bipolar atom.
E) more massive.
FIGURE 3-3
Consider two vectors and in Fig. 3-3. The difference – is
A) choice (a).
B) choice (b).
C) choice (c).
D) choice (d).
A simple pendulum has a length of 0.80 m and a bob of mass 0.20 kg. It is initially
displaced to an angle of 18 from the vertical and released from rest. At t = 1.2 s:
(a) what angle does it make with the vertical?
(b) what is its velocity?
A displacement vector is 34.0 m in length and is directed 60.0 east of north. What are
the components of this vector?
Northward Eastward
choice component component
1 29.4 m 17.0 m
2 18.2 m 28.1 m
3 22.4 m 11.5 m
4 17.0 m 29.4 m
5 25.2 m 18.2 m
A) Choice 1
B) Choice 2
C) Choice 3
D) Choice 4
E) Choice 5
If a reactor produces an average power of 1000 MW for a year, how much mass is
turned into energy?
A) 0.35 kg
B) 1.75 kg
C) 384 kg
D) 1.1 108 kg
E) 3.3 108 kg
When a vapor condenses into a liquid, its temperature
A) insufficient information, cannot answer
B) rises.
C) stays the same.
D) falls.
FIGURE 6-4
A rope is towing a 100-kg rock, from rest, with a force that varies with time, as shown
in Fig. 6-4. At the end of 8.0 s, the velocity of the rock is
A) zero.
B) +80 m/s.
C) +20 m/s.
D) -20 m/s.
E) +40 m/s.
When you lift a 12. ounce beverage can from the table top to your mouth, you do
approximately how much work?
A) 1 Calorie
B) 1 Watt
C) 1 Kw-h
D) 1 Joule
E) 1 erg
Heisenberg is especially noted for his
A) wave equation.
B) improved periodic table.
C) dirigible.
D) uncertainty principle.
E) photoelectric theory.
The Earth reversed its magnetic field about how many years ago?
A) 700
B) 700,000
C) 11
D) 7000
E) 70,000,000
A horizontal force of 5.0 N accelerates a 4.0 kg mass, from rest, at a rate of 0.50 m/s2 in
the positive direction. What friction force acts on the mass?
A) +3.0 N
B) -3.0 N
C) +2.0 N
D) -2.0 N
E) -3.3 N
The exchange particle for quarks is called
A) the stickon.
B) the gluon.
C) the epsilon.
D) the epoxyon.
George Gamow, the creator of the Big-Bang theory of the origin of the universe, asks
you to imagine what would happen if the speed of light was 15. mi/h. If you were on
the sidewalk looking at a bicyclist ride down the street, how does she look to you while
riding, compared to when she stops?
A) taller, the same mass, but stretched out like a limousine
B) shorter, the same mass, but stretched out like a limousine
C) same height, greater mass, and flatter in the direction she is moving
D) same height, smaller mass, and flatter in the direction she is moving
E) shorter, greater mass, but stretched out like a limousine
The inductive reactance of a 20.0-mH inductor at a certain frequency is 120 Ω. What is
the frequency in Hz?
A) 120 Hz
B) 167 Hz
C) 478 Hz
D) 6000 Hz
E) 955 Hz
Bullet G is dropped, from rest, at the same time that another bullet H is fired
horizontally from a rifle. If both bullets leave from the same height above the ground,
then
A) bullet G hits the ground before bullet H does.
B) both bullets hit the ground at the same time.
C) bullet H hits the ground before bullet G does.
D) not enough information is given to compare when they hit.
A car was moving 110. km/hour.
(a) How long did it take to go 25.5 miles?
(b) If it stopped in 35. s, what was its average acceleration (m/s2) as it slowed down?
FIGURE 3-1
A 200-lb force is pulling on an object, as shown in Fig. 3-1. The sign of the x and y
components of the force are
A) x (negative), y (negative).
B) x (positive), y (negative).
C) x (negative), y (positive).
D) x (positive), y (positive).
A mass is attached to a spring of spring constant 60 N/m along a horizontal, frictionless
surface. The spring is initially stretched by a force of 5.0 N on the mass and let go. It
takes the mass 0.50 s to go back to its equilibrium position when it is oscillating. What
is the period of oscillation?
A) 0.50 s
B) 1.0 s
C) 1.5 s
D) 2.0 s
E) 2.5 s
What is the unit for the quantity RC?
A) volt-Ampere/ohm
B) ohms
C) meters
D) seconds
E) Kg
The focal lengths of the objective and the eyepiece of a microscope are 0.5 cm and 2.0
cm, respectively, and their separation adjusted for minimum eyestrain is 6.0 cm. The
near-point distance of the person using the microscope is 25.0 cm.
(a) If the microscope is focused on a small object, what is the distance between the
object and the objective lens?
(b) If the microscope is focused on a small object, what is its final magnification?
Two 4.0-Ω resistors are connected in parallel, and this combination is connected in
series with 3.0 Ω. What is the effective resistance of this combination?
A) 1.2 Ω
B) 5.0 Ω
C) 7.0 Ω
D) 8.0 Ω
E) 11 Ω
An alpha particle (6.70 10-27 kg, 3.2 10-19 Coulomb) travels at 0.965c. What is its:
(a) rest energy (in eV)?
(b) total energy (in eV)?
(c) kinetic energy (in eV)?
Light precedes through three polarizing sheets. Unpolarized light enters the 1st sheet
and the resultant vertically polarized beam continues through the 2nd and 3rd. The 2nd
sheet has its transmission axis at 50. with respect to the 1st, and the 3rd is at 70. with
respect to the 1st.
(a) What percent of the original intensity emerges from filter #1?
(b) What percent of the original intensity emerges from filter #2?
(c) What percent of the original intensity emerges from filter #3?
(d) If filter #2 has its transmission axis changed to 30., what % intensity now emerges
from the 3rd filter?
What is the conversion factor between km/h2 and m/s2?
A) 7.72 x 10-5 m/ s2
B) 2.78 x 10-1 m/ s2
C) 1.30 x 104 m/ s2
D) 3.60 m/ s2
E) 36.0 m/ s2
An electron traveling due north with speed 4.0 x 105 m/s enters a region where the
Earth’s magnetic field has the magnitude 5.0 x 10-5 T and is directed downward at 45
below horizontal. What force acts on the electron?
A) 2.3 x 10-18 N
B) 3.2 x 10-18 N
C) 2.3 x 10-19 N
D) 3.2 x 10-19 N
E) 2.3 x 10-20 N
FIGURE 5-3
A ball is released, from rest, at the left side of the loop-the-loop, at the height, h, as
shown in Figure 5-3.
Refer to Fig. 5-3. If the radius of the loop is R, what minimum height h allows the ball
not to fall off the track at the top of the loop?
A) 3.5 R
B) 2.5 R
C) 2.0 R
D) R
E) 3.0 R
A spherical mirror has a radius of curvature of 22 cm. If the mirror is convex, its focal
length is
A) -11 cm.
B) -44 cm.
C) 22 cm.
D) 11 cm.
E) -22 cm.
Consider two cylinders of gas identical in all respects except that one contains O2 and
the other He. Both hold the same volume of gas at STP and are closed by a movable
piston at one end. Both gases are now compressed adiabatically to one-third their
original volume. Which gas will show the greater pressure increase?
A) the O2
B) the He
C) neither; both will show the same increase
D) impossible to tell from the information given