In the two-slit experiment, monochromatic light of wavelength 600 nm passes through a
pair of slits separated by 2.20 x 10-5 m.
(a) What is the angle corresponding to the first bright fringe?
(b) What is the angle corresponding to the second dark fringe?
A mass attached to the free end of an ideal spring executes SHM according to the
equation x = 0.5 sin(20t) where x is in meters and t is in seconds. What is the magnitude
of the maximum acceleration for this mass?
A) 10 m/s2
B) 100 m/s2
C) 20 m/s2
D) 200 m/s2
E) (20/π) m/s2
A person’s eye lens is 2.7 cm away from the retina.
(a) What must the focal length of this lens be in order for an object placed at the near
point (N = 25.0 cm) of the eye to focus on the retina?
(b) What must the focal length of this lens be in order for an object placed at the far
point of the eye to focus on the retina?
An antitank weapon fires a 3.0 kg rocket which acquires a speed of 50. m/s after
traveling 90. cm down a launching tube. Assuming the rocket was accelerated
uniformly, what force acted on it?
A) 4.2 kN
B) 3.6 kN
C) 2.8 kN
D) 2.0 kN
E) 5.8 kN
A mirror with a focal length -25 cm has a 4.0 cm tall object placed 100 cm in front of it.
What is the height of the image?
A) 0.8 cm
B) 20 cm
C) 4.0 cm
D) -0.8 cm
E) -20 cm
A device obeying Ohm’s law must have a resistance which
A) is proportional to voltage.
B) is proportional to current.
C) is constant.
D) is zero.
The dielectric constant of a vacuum is
A) zero.
B) 8.99 109.
C) o.
D) 1000.
E) 1.000.
In Fig. 18-3, which of the following relations is true?
A) I1 + I2 – I3 = 0
B) I1+ I2 + I3 = 0
C) I1– I2 – = 0
D) I1– I2 + I3 = 0
E) – I1 + I2 + I3 = 0
A ball is thrown straight up with a speed of 30 m/s.
(a.) How long does it take the ball to reach the maximum height?
(b.) What is the maximum height reached by the ball?
(c.) What is its speed after 4.2 s?
FIGURE 23-4
See Fig. 23-4. When two parallel white rays pass through the outer edges of a
converging glass lens, chromatic aberration will cause colors to appear on the screen in
what order, from the top down?
A) red, blue, red, blue
B) blue, red, blue, red
C) red, blue, blue, red
D) blue, red, red, blue
E) blue, blue, red, red
A slit of width 0.01 mm has light of wavelength 600 nm passing through it onto a
screen 60 cm away. How wide (in cm) is the central maximum?
A) 0.12 cm
B) 7.2 cm
C) 1.8 cm
D) 3.6 cm
E) 0.9 cm
Erwin Schrodinger
A) suggested the existence of matter waves (1924).
B) discovered the positron using a cloud chamber (1932).
C) was the first to produce diffraction patterns of electrons in crystals (1927).
D) developed a wave equation for matter waves (1926).
E) set the limits on the probability of measurement accuracy (1927).
A microscope has an objective lens of focal length 1.4 mm and an eyepiece of focal
length 20 mm, adjusted for minimum eyestrain. A blood sample is placed 1.5 mm from
the objective. How far apart are the lenses?
A) 20 mm
B) 21 mm
C) 23 mm
D) 33 mm
E) 41 mm
When a dielectric material is introduced between the plates of a parallel plate capacitor
the capacitance increases by a factor of 4. What is the dielectric constant of the material
introduced between the plates?
A) 0.4
B) 1/4
C) 2
D) 4
E) None of the other choices is correct.
What is 56 + ( 32.00)/(1.2465 + 3.45) written with the correct number of significant
figures?
A) 62.8
B) 62.812
C) 62.81
D) 63
E) 62.8123846
A heat engine absorbs 64 kcal of heat each cycle and exhausts 42 kcal.
(a) Calculate the efficiency each cycle.
(b) Calculate the work done each cycle.
In a He-Ne laser, the actual emission line at 632.8 nm comes from a jump down in what
atom(s)?
A) neon
B) helium
C) helium and neon
D) oxygen
E) hydrogen
When a ball is thrown straight up, the acceleration at its highest point is
A) upward.
B) downward.
C) zero.
D) horizontal.
E) minimum.
The lowest tone to resonate in an open pipe of length L is 400. Hz. What is the
frequency of the lowest tone that will resonate in a closed pipe of length 2L?
A) 200. Hz
B) 1.60 kHz
C) 100. Hz
D) 400. Hz
E) 0.800 kHz
A substance with a greater specific heat ________ has a larger heat capacity.
A) always
B) never
C) seldom
D) sometimes
Two point charges of magnitudes + 8.00 μC, and + 10.0 μC are placed along the x-axis
at x = 0 cm and x = 100 cm, respectively. Where must a third charge be placed along the
x-axis so that it does not experience any net force because of the other two charges?
A) 4.72 cm
B) 47.2 cm
C) 50 cm
D) 9.12 cm
E) 91.2 cm
Doubling only the amplitude of a vibrating mass-and-spring system produces what
effect on the system’s mechanical energy?
A) produces no change
B) increases the energy by a factor of three
C) increases the energy by a factor of four
D) increases the energy by a factor of two
E) increases the energy by a factor of
A motorist travels 160 km at 80 km/h and 160 km at 100 km/h. What is the average
speed of the motorist for this trip?
A) 90 km/h
B) 89 km/h
C) 60 km/h
D) 91 km/h
E) 84 km/h
As more resistors are added in parallel to a constant voltage source, the power supplied
by the source
A) increases.
B) decreases.
C) does not change.
D) increases for a time and then starts to decrease.
A rem is
A) a dosage of 2.58 x 10-4 C/kg.
B) produces same tissue damage as 1 rad.
C) the SI unit of absorbed dose = 1 J/kg = 100 rad.
D) an effective dose (= (rads)(RBE)).
E) a dose that 3.70 x 1010 decays/s in radium.
A quark is
A) a constituent of a nucleon.
B) a constituent of a hadron.
C) an elementary particle.
D) an elementary particle which is a constituent of a hadron & a nucleon.
Consider 550. nm light passing through 2 narrow slits 2.10 micro-meters apart. The 1st
and 2nd order fringes are 1.00 mm apart on a distant screen. How far apart are the 2nd
and 3rd order fringes?
A) 1.35 mm
B) 1.00 mm
C) 0.750 mm
D) 0.500 mm
E) 1.74 mm
When a solid melts
A) the temperature of the substance increases.
B) the temperature of the substance decreases.
C) heat energy leaves the substance.
D) heat energy enters the substance.
Two equal mass balls (one blue and the other gold) are dropped from the same height,
and rebound off the floor. The blue ball rebounds to a higher position. Which ball is
subjected to the greater magnitude impulse during its collision with the floor?
A) the gold ball
B) Both balls were subjected to the same magnitude impulse.
C) It’s impossible to tell since the time intervals and forces are unknown.
D) the blue ball
If 40 kcal of heat is added to 2.0 kg of water, what is the resulting temperature change?
A) 80° C
B) 60 °C
C) 40° C
D) 20 °C
E) 0.05° C