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Метки: Статистика |
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Calculate following expressions without a calculator and a pen |
2013 ⋅ 2012
2013 ⋅ 2011 + 20132
20132 - 20122
2012 + 2013
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√ 20132- 2 ⋅ 2013 ⋅ 2012 + 20122
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√ 10052 + 2 ⋅ 1005 ⋅ 1007 + 10072
123456789 _
123456788 + 123456790
20133 - 3 ⋅ 20132 ⋅ 2012 + 3 ⋅ 2013 ⋅ 20122 - 20123
20132 - 2 ⋅ 2013 ⋅ 2012 + 20122
20133 + 3 ⋅ 20132 ⋅ 2012 + 3 ⋅ 2013 ⋅ 20122 + 20123
20132 + 2 ⋅ 2013 ⋅ 2012 + 20122
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BMCC, Fall 2012: Pre-Exam. PHY 110 - General Physics |
BMCC, Fall 2012: Pre-Exam. PHY 110 12/13/2012
Student Last Name________________First Name________________Date_____________
WARNING! This is only a guide in order to focus your studying effort. The final will not be exactly like this. The problems presented here approximate those on the final; they do not mimic them. Please study over and above that which is given here.
If an object has a volume of 8m3, what is the volume in cubic millimeters?
A) 8000mm3 B) 8·106mm3 C) 8·109mm3 D)8·10-9mm3 E)2000mm
A runner traveling with an initial velocity of 1 m/s accelerates at a constant rate of 1.5 m/s2 for a time of 2 seconds. What is velocity at the and of this time.
A) 4 B) 4m/s C) 3 D) 3m/s E) 7.5m/s
A ball rolls off a table with a horizontal velocity of 4m/s. If it takes 2 seconds for the ball to reach the floor. What is the magnitude of the vertical component of the ball's velocity just before it hits the floor.
A) 24m/s B) 16m/s C) 20m/s D) 20.4m/s E) -20m/s
What is the weight of 70-kg mass ( on the surface of the Earth)?
A) 70kg B) 7N C) 700 D) 0.7kN E) 700lb
An object has a weight of 360N when it is locates on the surface of the Earth. What would it weight (the gravitational force due to the Earth) be if the object tripled its distance from the center of the Earth by flying in a spacecraft?
A) 120N B) 1020N C) 3240N D) 3240kg E) 40N
To stretch a spring a distance of 0.1 m, 80 J of work is done. What is the value of the spring constant k of the spring.
A) 16kN/m B) 16000 C) 800J/m D) 0.125·10-2m/J E) No solution
An object with the mass 10kg are at the top of a hill a height of 20 m above the level ground below. The object is given a push providing an initial kinetic energy at the top of the hill of 500J. If friction can be ignored, what will be the kinetic energy of the object at the bottom of the hill?
A) 2000J B) 2500 C) 1.5kJ D)2.5kJ E) 700J
A car with a mass of 8000kg collides and couples with a second car of mass 4000kg that is initially at rest. The first car is moving with a speed of 3m/s prior to the collision. If external forces can be ignored, what is the final velocity of the two cars after they couple?
A) 6m/s B) 3m/s C) 2m/s D) 1m/s E) No solution
A torque of 50 N·m producing a counterclockwise rotation is applied to a wheel about its axle. A frictional torque of 10 N·m acts at the axle. If the wheel is observed to accelerate at the rate of 8 rad/s2 under the influence of these torques, what is the rotational inertia of the wheel?
A) 5kg·m2 B) 60 N·m C) 40 N·m D) 320 kg·m2 E) No solution
A stream moving with a speed of 8 m/s reaches a point where the cross-sectional area of the stream decreases to one-half of the original area. What is the water speed in this narrowed portion of the stream?
A) 8m/s B) 4m/s C) 2m/s D) 16m/s E) No solution
The volume of an ideal gas is increased from 1m3 to 8m3 while maintaining a constant pressure of 1000 Pa (1 Pa = 1 N/m2). How much work is done by the gas in this expansion?
A) 9kJ B) 8kJ C) 7kJ D) 0.007J E) No solution
Ten coulombs of positive charge flow from the +10 V positive terminal of a battery to the negative terminal at +5 V. What is the change in potential energy of the charge?
A) 100 J B) 50 J C) 10 J D) 2 J E) No solution
A 10-Ω resistor has a voltage difference of 2 V across its leads. What is the power being dissipated in this resistor?
A) 0.4W B) 20W C) 0.2W D) 40W E) No solution
If a 20 A current are supplied to the primary coil of a transformer, which has 100 turns of wire in its primary coil and 400 turns on its secondary coil, what is the effective current in the second coil?
A) 80A B) 5A C) 6·103A D) 15A E) No solution
What is frequency of a sound wave with a wavelength of 0.34 m traveling in room-temperature air (v=340m/s)?
A) 115.6 m2 / s B) 1 millisecond C) 1 kHz D) 1000 E) No solution
When passed through a diffraction grating with a slit spacing of 0.004 mm, the first order fringe for light of a single wavelength lies a distance of 60 cm from the center of a screen located 4 m from the grading. What is the wavelength of the light?
A) 600nm B) 0.06 C) 600km D) 240nm E) No solution
The objective lens of a microscope has a focal length of 0.4 cm. An object on the microscope slide is placed at a distance of 0.5 cm from the lens.
What is the magnification of this image?
A) 4 m B) 4 C) 5/4 D) 4/5 E) No solution
Suppose that a photon has a wavelength of 600nm. What is frequency of this photon?
A) 5·1012Hz B) 5·1013Hz C) 5·1014Hz D) 5·1015Hz E) No solution
How many half-lives must go by for the radioactivity of a given isotope to drop to 1/1024 of its original value?
A) 8 half-lives B) 9 half-lives C) 10 half-lives D) 11 half-lives E) No solution
A ball is thrown downward with speed 15 m/s from the roof of a 30 m building. At the same instant a ball is thrown upward with speed 15 m/s from ground level. Relative to ground level, the two balls pass each other at a height of
A) 0 B) 5.0 m C) 10 m D) 15 m E) 20 m
Three forces act on an object which is moving at a constant velocity. Two of the forces are 3 N and 4 N. What is the magnitude of the third force?
a) 0 N b) 1 N c) 5 N d) 7 N e) Cannot be determined from the information provided.
A light string pulls a 8 kg object directly upward with an acceleration of 2 m/s2.
What is the tension in the string?
a) 96 N b) 64 N c) 80 N d) 16 N e) No solution
A 2 kg block, initially moving at 10 m/s, slides 50 m across a sheet of ice before coming to rest. What is the magnitude of the average frictional force on the block?
a) 4 N b) 2 N c) 0.4 N d) 0.2 N e) 0 N
A horizontal force of 50 N is needed to keep a 25 kg block moving with constant velocity of magnitude 5 m/s across a horizontal rough table. What is the coefficient of kinetic friction?
a) 0 b) 0.01 c) 0.02 d) 0.1 e) 0.2
A large spring requires a force of 150 N to compress it only 0.010 m. What is the spring constant of the spring?
a) 125 000 N/m b) 15 000 N/m c) 15 N/m d1.5 N/m e) 1.0 N/m
Which of the following is true for a system consisting of a mass oscillating on the end of an ideal spring?
A) The kinetic and potential energies are equal at all times.
B) The kinetic and potential energies are both constant.
C) The maximum potential energy is achieved when the mass passes through its equilibrium position.
D) The maximum kinetic energy and maximum potential energy are equal, but occur at different times.
E) No solution
Each of five satellites makes a circular orbit about an object that is much more massive than any of the satellites. The mass and orbital radius of each satellite are given below. Which satellite has the greatest speed?
Mass Radius
A) R
B) m
C) m R
D) m 2R
E) 2m R
When the frictionless system shown above is accelerated by an applied force of magnitude F, the tension in the string between the blocks is
A) 2F B) F C) D) E)
A body moving in the positive x direction passes the origin at time t = 0. Between t = 0 and t = 1 second, the body has a constant speed of 24 meters per second. At t = 1 second, the body is given a constant acceleration of 6 meters per second squared in the negative x direction. The position x of the body at t = 11 seconds is A) +99 m B) +36 m C) -36 m D) -75 m E) -99 m
A virtual image
a) Can be seen from any and all angles
b) Has rays of light from the object actually crossing at its location after being reflected or refracted
c) Is always the same size or larger than a real image
d) Will not appear if a screen is placed at its location
e) Is said to be virtual because it cannot be seen
As the frequency of an electromagnetic wave in empty space gets larger
a) The amplitude of the wave gets smaller
b) The amplitude of the wave gets larger
c) The speed of the wave gets slower
d) The wavelength of the wave gets larger
e) The wavelength of the wave gets smaller
900 g of water at 100 ºC are poured into an 4 kg aluminum container with an initial temperature of 0 ºC. The specific heat of aluminum is 0.9 kJ/(kg·K), the specific heat of water is 4 kJ/(kg·K). How much heat flows from the water to the aluminum, assuming no heat is exchanged with the surroundings?
A) 50 ºC B) 1.8·105 J C) 360 kJ D) 180 E) No solution
The temperature is -22ºF. What is the corresponding temperature in the Celsius scale?
A) -20ºC B) -35ºC C) -30ºC D) 251.15ºC E) -7.6ºC
An aluminum electric tea kettle has a mass of 500 g. It has a 500-W heating coil. How long will it take to heat up 1.0 kg of water from 18ºC to 98ºC in the tea kettle? The specific heat of aluminum is 900 J/(kg·K), the specific heat of water is 4 kJ/(kg·K).
A) 12 minutes B) 10.7 minutes C) 22.7 minutes D) 13.6 minutes E) 1360
Calculate the cost of using a 2.5 kW electric fire for 2 hours if the cost per kilowatt-hour is 12 cent
A) 5 kW·h B) $0.6 C) 6 cent D) 15 cent E) 9.6 cent
Two metal spheres are made of the same material and have the same diameter, but one is solid and the other is hollow. If their temperature is increased by the same amount,
A) the two spheres remain equal.
B) the solid sphere becomes heavier and the hollow one lighter.
C) the hollow sphere becomes bigger than the solid one.
D) the solid sphere becomes bigger than the hollow one.
E) There is not enough information to answer this question.
Two metal rods are made of the same material and have the same cross-sectional area. The two rods differ only in their lengths which we call L and 3L, respectively. You heat the two rods from the same initial temperature to the same final temperature. You observe that the short rod expands its length by an amount ΔL. The amount by which the length of the long rod will expand must be
A) 2ΔL B) 3/2 ΔL C) 3ΔL D) ΔL E) No solution
In balancing the nuclear reaction
92U293 = 90E234 + 2He4 ,
the identity of element E is __________ .
A) Pu. B) U. C) Th. D) Np. E) Pa.
The single alpha decay of what isotope of what element produces lead-206?
A) polonium-210 B) mercury-204 C) lead-210 D) polonium-209 E) No solution
The resistors – R1, R2, and R3 – have been adjusted so that the current in the ammeter (labeled A in the accompanying circuit diagram) is zero. What is R?
A) R2 B) R3 C) R1R2/R3 D) R1R3/R2 E) R2R3/R1
As shown in the diagram to the right, two fixed charges, q1 = +1.00 mC and q2 = - 4.00 mC, are 0.200 m apart. Where is the total field zero?
A) 0.40 m to the right of q1
B) 0.13 m to the right of q1
C) 0.1m to the right of q1
D) 0.067 m to the left of q1
E) 0.20 m to the left of q1
Symbol P in the Physics formula P=W/t represents:
A) pressure, B) power, C) momentum, D) phosphorus, E) dipole moment.
Symbol p in the Physics formula p=mv represents:
A) pressure, B) power, C) momentum, D) phosphorus, E) dipole moment.
Symbol p in the Physics formula p=FNORMAL/A represents:
A) pressure, B) power, C) momentum, D) phosphorus, E) dipole moment.
Symbol a in the Physics formula d=v0t+½at2 represents:
A) angular momentum, B) area, C) acceleration, D) amplitude, E) atomic number.
Symbol A in the Physics formula Φ=BA represents
A) angular momentum, B) area, C) acceleration, D) amplitude, E) atomic number.
Approximate weight of 100g water is
A) 100N, B) 10N, 3) 1N, 4) 0.1N, 5) 0.01N
Symbol FNET in the Physics formula a=FNET/m represents:
A) net force, B) frequency, C) friction, D) focal length, E) fluid pressure
Symbol f in the Physics formula 1/o + 1/i = 1/f represents:
A) net force, B) frequency, C) friction, D) focal length, E) fluid pressure
Symbol f in the Physics formula f=1/T represents:
A) net force, B) frequency, C) friction, D) focal length, E) fluid pressure
If an object has a volume of 8m3, what is the volume in cubic millimeters?
A) 8000mm3 B) 8·106mm3 C) 8·109mm3 D)8·10-9mm3 E)2000mm
A runner traveling with an initial velocity of 1 m/s accelerates at a constant rate of 1.5 m/s2 for a time of 2 seconds. What is velocity at the and of this time.
A) 4 B) 4m/s C) 3 D) 3m/s E) 7.5m/s
A ball rolls off a table with a horizontal velocity of 4m/s. If it takes 2 seconds for the ball to reach the floor. What is the magnitude of the vertical component of the ball's velocity just before it hits the floor.
A) 24m/s B) 16m/s C) 20m/s D) 20.4m/s E) -20m/s
What is the weight of 70-kg mass ( on the surface of the Earth)?
A) 70kg B) 7N C) 700 D) 0.7kN E) 700lb
An object has a weight of 360N when it is locates on the surface of the Earth. What would it weight (the gravitational force due to the Earth) be if the object tripled its distance from the center of the Earth by flying in a spacecraft?
A) 120N B) 1020N C) 3240N D) 3240kg E) 40N
To stretch a spring a distance of 0.1 m, 80 J of work is done. What is the value of the spring constant k of the spring.
A) 16kN/m B) 16000 C) 800J/m D) 0.125·10-2m/J E) No solution
An object with the mass 10kg are at the top of a hill a height of 20 m above the level ground below. The object is given a push providing an initial kinetic energy at the top of the hill of 500J. If friction can be ignored, what will be the kinetic energy of the object at the bottom of the hill?
A) 2000J B) 2500 C) 1.5kJ D)2.5kJ E) 700J
A car with a mass of 8000kg collides and couples with a second car of mass 4000kg that is initially at rest. The first car is moving with a speed of 3m/s prior to the collision. If external forces can be ignored, what is the final velocity of the two cars after they couple?
A) 6m/s B) 3m/s C) 2m/s D) 1m/s E) No solution
A torque of 50 N·m producing a counterclockwise rotation is applied to a wheel about its axle. A frictional torque of 10 N·m acts at the axle. If the wheel is observed to accelerate at the rate of 8 rad/s2 under the influence of these torques, what is the rotational inertia of the wheel?
A) 5kg·m2 B) 60 N·m C) 40 N·m D) 320 kg·m2 E) No solution
A stream moving with a speed of 8 m/s reaches a point where the cross-sectional area of the stream decreases to one-half of the original area. What is the water speed in this narrowed portion of the stream?
A) 8m/s B) 4m/s C) 2m/s D) 16m/s E) No solution
The volume of an ideal gas is increased from 1m3 to 8m3
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Метки: BMCC Fall 2012 PHY 110 |
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General Physics, PHY-110, 521, Fall 2012 Final Exam |
BMCC, CUNY, PHY 110, 521
Fall 2012 Final Exam
Points (correct answers) Possible: 50
Description: Number of correct solutions of 50-question, multiple choice, open-book final exam.
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Count |
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Minimum Value |
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Maximum Value |
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Range |
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Average |
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Median |
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Standard Deviation |
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Variance |
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greater than 100 |
0 |
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90 - 100 |
4 |
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80 - 89 |
9 |
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70 - 79 |
6 |
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60 - 69 |
3 |
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50 - 59 |
1 |
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40 - 49 |
0 |
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30 - 39 |
1 |
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20 - 29 |
0 |
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10 - 19 |
0 |
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0 - 9 |
0 |
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less than 0 |
0 |
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Метки: PHY-110 General Physics BMCC |
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Physics: Multiple choice questions |
Physics: Multiple choice questions
Answer Key
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