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physics exam (SAT) review - set 0 Flashcards | StudBud
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physics exam (SAT) review - set 0
physics exam (SAT) review - set 0
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Practice problems for the SAT II physics subject exam, or comprable other exams.
Flashcards
30 cards
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Practice quiz
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Questions
30
Answers
1
Which of the following is equivalent to 1 Pascal (Pa) of gas pressure?
kg·m3/s2
kg/(m·s2)
kg·m2/s2
kg·m/s
2
Two hundred cm
3
of gas are heated from 30°C to 60°C with no pressure change.The gas volume will
be decreased by about 10%.
be increased by about 10%.
be halved.
remain the same.
3
Two resistors (20Ω, 60Ω) are in series. Voltage across the 20Ω is 80V. Current through the 60Ω:
is 1.0 A
is about 5 A
is 4.0 A
cannot be calculated with the given information
4
Which of the following statements about
simple harmonic motion
described below is correct?
Maximum velocity occurs whenthe acceleration is a minimum
Velocity is always directly proportional to displacement
Maximum velocity and max.acceleration occur at the same time
Max. velocity occurs when displacement (from eq.) is maximal
5
If a gas is
heated at constant pressure
, select all of the statements [see figure] that apply?
I and II only
I only
III only
I and III only
6
3 wires:
copper, iron, nichrome
(same length, x-sec) in ∥ with a cell.
I
through the Cu wire is
less than in the other wires.
greater than in the iron wire, but less than the nichrome.
greater than in the other wires.
the same as in the other wires.
7
The approximate speed of light in
water
, in meters per second, is
2.3×108
3.0×108
1.0×108
5.8×108
8
Two forces, 10 N and 7 N, act on a body.The
minimum
resultant (net) force magnitude, in N, is
√149
0
3
7
9
To double the period of an ideal pendulum, we should change the length
L
of the string to
½ L
4L
2L
¼ L
10
Variation of the pressure of a gas versus its volume, at constant temperature, is best shown by
line C
line E
line B
line A
11
Consider the circuit in the diagram below. What is the current as measured by the ammeter?
1 A
2 A
6 A
3 A
12
Light (red: λ = 600 nm) shines on two slits 2.0 μm apart, forming an interference pattern;
x
is
3.0×10-1 m
6.0×10-7 m
6.0×10-1 m
6.7×10-1 m
13
To
double the elastic p.e.
of a spring with force const.
k
, by what factor must
x
be changed?
2
√2
¼
½
14
We project ball X horizontally and drop ball Y at the same time; both start at the same height.
Y will reach the ground first
X and Y will reach the level ground at the same time
we need to know the masses of X and Y to decide
X will reach the level ground first
15
[See figure - capacitors] When current stops flowing, how much total charge has been separated?
0.50 μC
2.0 μC
288 μC
40 μC
16
The difference in path length for rays of light from the two slits to the second maximum is
0
λ
½ λ
2λ
17
Light (frequency
f
) falls on a photoemissive metal, ejecting electrons. To increase their k.e.:
Increase both frequency and intensity of light
Increase the frequency of the incident light
Decrease the work function by using a different metal
Increase the intensity of the incident light
18
Two frequencies together produce 3 beats per second. If one is 400 Hz, what may the other be?
3 Hz
397 Hz
403 Hz
1200 Hz
19
What is the electrical force on an
α
particle (charge +2
e
), located 0.50 cm from the + plate?
1.9×10-15 N
3.9×10-15 N
1.9×10-16 N
3.9×10-16 N
20
Two carts (mass 0.40 & 1.2 kg) are released from rest; the light cart rolls at 0.6 m/s; v
heavy
?
0.45 m/s
1.8 m/s
0.60 m/s
0.20 m/s
21
Fast alpha particles are shot at a thin metallic foil. We observe that most of the particles
are absorbed.
bounce backward.
pass through with virtually no deflection.
are widely scattered.
22
An object moves along a line [v(t) plotted]. The average speed
during the first 4 s
, in m/s, is
2.5
zero
4.0
1.2
23
A motor operates from a 120V source; coils have 30Ω of resistance. How much power is generated?
480 W
30 W
3600 W
4 W
24
The image & object are the same size when d
obj
=20cm. The
largest real image
appears when d
obj
≈
15 cm
5 cm
40 cm
10 cm
25
The Sun’s energy is believed to be a result of
nuclear fission.
nuclear fusion.
oxidation of hydrogen.
oxidation of helium.
26
[Figure] The compass needle is deflected to point south. The current in the wire is directed
east
down
west
up
27
15 cm of wire is moved ⊥a unif. magn. field at 4.0 m/s, inducing 3.0 mV. Flux density in T is
0.003
2000
6
0.005
28
What
average braking force
is required to stop a 2500 kg car with speed 30 m/s in 15 seconds?
5.0 kN
10 kN
1.13 MN
2.5 kN
29
[Refer to the figure] After 2 seconds, the momentum, in kilogram·meters per second, will be
24
12
30
45
30
[Refer to the figure] How much frictional force, in newtons, is opposing the forward motion?
40
12
4
3
