Question 1

0)00325 × 10-8 cm can also be expressed in mm as

Accepted Answer

A)  3.25 × 10-12 mm. 
B)  3.25 × 10-11 mm. 
C)  3.25 × 10-10 mm. 
D)  3.25 × 10-9 mm. 
E)  3.25 × 10-8 mm.

Question 2

A refrigerator has a coefficient of performance equal to 4.2.How much work must be done on the refrigerator in order to remove 250 J of heat from the interior?

Accepted Answer

A)  60 J 
B)  120 J 
C)  250 J 
D)  480 J 
E)  1050 J

Question 3

A new roller coaster contains a loop-the-loop in which the car and rider are completely upside down.If the radius of the loop is 13.2 m,with what minimum speed must the car traverse the loop so that the rider does not fall out while upside down at the top? Assume the rider is not strapped to the car.

Accepted Answer

A)  11.4 m/s 
B)  12.5 m/s 
C)  10.1 m/s 
D)  14.9 m/s

Question 4

A laser emits light of wavelength 463 nm during a brief pulse that lasts for 25 ms and has a total energy of 1.2 J.How many photons are emitted in that single pulse? (c = 3.00 × 108 m/s,
H = 6.626 × 10-34 J • s)

Accepted Answer

A)  2.8 × 1018 
B)  6.9 × 1019 
C)  3.4 × 1019 
D)  1.1 × 1017 
E)  2.2 × 1017

Question 5

A horizontal wire carries a current straight toward you.From your point of view,the magnetic field at a point directly below the wire points

Accepted Answer

A)  directly away from you. 
B)  to the left. 
C)  to the right. 
D)  directly toward you. 
E)  vertically upward.

Question 6

A block is on a frictionless horizontal table,on earth.This block accelerates at 1.9 m/s2 when a 90 N horizontal force is applied to it.The block and table are then set up on the moon where the acceleration due to gravity is 1.62 m/s2.What is the weight of the block on the moon?

Accepted Answer

A)  77 N 
B)  67 N 
C)  58 N 
D)  48 N 
E)  39 N

Question 7

A thin layer of oil (n = 1.25)is on top of a puddle of water (n = 1.33).If normally incident 500-nm light is strongly reflected,what is the minimum nonzero thickness of the oil layer?

Accepted Answer

A)  200 nm 
B)  250 nm 
C)  100 nm 
D)  400 nm 
E)  150 nm

Question 8

The components of vector  are Ax = +2.2 and Ay = -6.9,and the components of vector 
Are given are Bx = -6.1 and By = -2.2.What is the magnitude of the vector 
- 
?

Accepted Answer

A)  9.5 
B)  6.1 
C)  9.9 
D)  91 
E)  0.76

Question 9

A long,thin rod parallel to the y-axis is located at x = -1.0 cm and carries a uniform linear charge density of +1.0 nC/m.A second long,thin rod parallel to the z-axis is located at x = +1.0 cm and carries a uniform linear charge density of -1.0 nC/m.What is the net electric field due to these rods at the origin? (ε0 = 8.85 × 10-12 C2/N • m2)

Accepted Answer

A)  (-3.6 × 103 N/
C)   
B)  (1.8 × 103 N/
C)   
C)  (-1.8 × 103 N/
C)   
D)  (3.6 × 103 N/
C)   
E)  zero

Question 10

Two strings of identical material and radius are stretched with the same tension with their ends fixed,but one string is 8.0 mm longer than the other.Waves on these strings propagate at 420 m/s.The fundamental frequency of the longer string is 528 Hz.What is the beat frequency when each string is vibrating at its fundamental frequency?

Accepted Answer

A)  22 Hz 
B)  11 Hz 
C)  16 Hz 
D)  5.5 Hz 
E)  27 Hz

Question 11

The figure shows a graph of the acceleration of an object as a function of the net force acting on it. The mass of this object,in grams,is closest to

Accepted Answer

A)  130. 
B)  11. 
C)  89. 
D)  8000.

Question 12

A bat emits a sound at a frequency of 30.0 kHz as it approaches a wall.The bat detects beats such that the frequency of the echo is 900 Hz higher than the frequency the bat is emitting.The speed of sound in air is 340 m/s.The speed of the bat is closest to

Accepted Answer

A)  20.0 m/s. 
B)  530 m/s. 
C)  10.0 m/s. 
D)  30.0 m/s. 
E)  5.02 m/s.

Question 13

An alpha particle is a nucleus of helium.It has twice the charge and four times the mass of the proton.When they were very far away from each other,but headed toward directly each other,a proton and an alpha particle each had an initial speed of 0.0030c,where c is the speed of light.What is their distance of closest approach? Hint: There are two conserved quantities.Make use of both of them.(c = 3.00 × 108 m/s,k = 1/4πε0 = 8.99 × 109 N • m2/C2,e = 1.60 × 10-19 C,mproton = 1.67 × 10-27 • kg)

Accepted Answer

A)  2.1 × 10-13 m 
B)  3.3 × 10-13 m 
C)  2.6 × 10-13 m 
D)  2.9 × 10-13 m

Question 14

The following four forces act on a 4.00 kg object:  1 = 300 N east 
2 = 700 N north 
3 = 500 N west 
4 = 600 N south
What is the acceleration of the object?

Accepted Answer

A)  224 N in a direction 63.4° north of west 
B)  300 N in a direction 63.4° north of west 
C)  300 N in a direction 26.6° north of west 
D)  224 N in a direction 26.6° north of west 
E)  2100 N in a direction 26.6° north of west

Question 15

A spaceship approaches the earth with a speed 0.50c.A passenger in the spaceship measures his heartbeat as 70 beats per minute.What is his heartbeat rate according to an observer that is at rest relative to the earth?

Accepted Answer

A)  69 beats per minute 
B)  73 beats per minute 
C)  65 beats per minute 
D)  61 beats per minute 
E)  80 beats per minute

Question 16

Heat is added to a 2.0 kg piece of ice at a rate of 793.0 kW.How long will it take for the ice to melt if it was initially at 0.00°C? (The latent heat of fusion for water is 334 kJ/kg and its latent heat of vaporization is 2260 kJ/kg.)

Accepted Answer

A)  0.84 s 
B)  530,000 s 
C)  4.7 s 
D)  670 s

Question 17

If you set the cruise control of your car to a certain speed and take a turn,the speed of the car will remain the same.Is the car accelerating?

Accepted Answer

A)  Yes 
B)  No

Question 18

What is the angle between the vector  = +3 
- 2 
- 3 
And the +y-axis?

Accepted Answer

A)  115° 
B)  65° 
C)  25° 
D)  155° 
E)  90°

Question 19

Beings on spherical asteroid Π have observed that a large rock is approaching their asteroid in a collision course.At 7514 km from the center of the asteroid,the rock has a speed of 136.0 m/s and later at 2823 km it has a speed of 392.0 m/s.Use energy conservation to find the mass of asteroid Π.You can neglect any effects due to the parent star of the asteroid.(G = 6.67 × 10-11 N • m2/kg2)

Accepted Answer

A)  4.582 × 1021 kg 
B)  9.164 × 1027 kg 
C)  6.112 × 1028 kg 
D)  4.582 × 1020 kg

Question 20

Two long conducting cylindrical shells are coaxial and have radii of 20 mm and 80 mm.The electric potential of the inner conductor,with respect to the outer conductor,is +600 V.An electron is released from rest at the surface of the outer conductor.What is the speed of the electron as it reaches the inner conductor? (e = 1.60 × 10-19 C,mel = 9.11 × 10-31 kg,k = 1/4πε0 = 8.99 × 109 N • m2/C2)

Accepted Answer

A)  1.1 × 107 m/s 
B)  1.3 × 107 m/s 
C)  1.5 × 107 m/s 
D)  1.7 × 107 m/s 
E)  1.9 × 107 m/s

Exam 1: A: Foundations

0) 00325 × 10^-8 cm can also be expressed in mm as

A refrigerator has a coefficient of performance equal to 4.2.How much work must be done on the refrigerator in order to remove 250 J of heat from the interior?

A laser emits light of wavelength 463 nm during a brief pulse that lasts for 25 ms and has a total energy of 1.2 J.How many photons are emitted in that single pulse? (c = 3.00 × 10⁸ m/s, H = 6.626 × 10^-34 J • s)

A horizontal wire carries a current straight toward you.From your point of view,the magnetic field at a point directly below the wire points

A block is on a frictionless horizontal table,on earth.This block accelerates at 1.9 m/s² when a 90 N horizontal force is applied to it.The block and table are then set up on the moon where the acceleration due to gravity is 1.62 m/s².What is the weight of the block on the moon?

A thin layer of oil (n = 1.25) is on top of a puddle of water (n = 1.33) .If normally incident 500-nm light is strongly reflected,what is the minimum nonzero thickness of the oil layer?

The components of vector are A_x = +2.2 and A_y = -6.9,and the components of vector Are given are B_x = -6.1 and B_y = -2.2.What is the magnitude of the vector - ?

The figure shows a graph of the acceleration of an object as a function of the net force acting on it. The mass of this object,in grams,is closest to

A bat emits a sound at a frequency of 30.0 kHz as it approaches a wall.The bat detects beats such that the frequency of the echo is 900 Hz higher than the frequency the bat is emitting.The speed of sound in air is 340 m/s.The speed of the bat is closest to

The following four forces act on a 4.00 kg object: ₁ = 300 N east ₂ = 700 N north ₃ = 500 N west ₄ = 600 N south What is the acceleration of the object?

A spaceship approaches the earth with a speed 0.50c.A passenger in the spaceship measures his heartbeat as 70 beats per minute.What is his heartbeat rate according to an observer that is at rest relative to the earth?

Heat is added to a 2.0 kg piece of ice at a rate of 793.0 kW.How long will it take for the ice to melt if it was initially at 0.00°C? (The latent heat of fusion for water is 334 kJ/kg and its latent heat of vaporization is 2260 kJ/kg.)

If you set the cruise control of your car to a certain speed and take a turn,the speed of the car will remain the same.Is the car accelerating?

What is the angle between the vector = +3 - 2 - 3 And the +y-axis?

Exam 1: A: Foundations

0) 00325 × 10-8 cm can also be expressed in mm as

A refrigerator has a coefficient of performance equal to 4.2.How much work must be done on the refrigerator in order to remove 250 J of heat from the interior?

A laser emits light of wavelength 463 nm during a brief pulse that lasts for 25 ms and has a total energy of 1.2 J.How many photons are emitted in that single pulse? (c = 3.00 × 108 m/s, H = 6.626 × 10-34 J • s)

A horizontal wire carries a current straight toward you.From your point of view,the magnetic field at a point directly below the wire points

A block is on a frictionless horizontal table,on earth.This block accelerates at 1.9 m/s2 when a 90 N horizontal force is applied to it.The block and table are then set up on the moon where the acceleration due to gravity is 1.62 m/s2.What is the weight of the block on the moon?

A thin layer of oil (n = 1.25) is on top of a puddle of water (n = 1.33) .If normally incident 500-nm light is strongly reflected,what is the minimum nonzero thickness of the oil layer?

The components of vector are Ax = +2.2 and Ay = -6.9,and the components of vector Are given are Bx = -6.1 and By = -2.2.What is the magnitude of the vector - ?

The figure shows a graph of the acceleration of an object as a function of the net force acting on it. The mass of this object,in grams,is closest to

A bat emits a sound at a frequency of 30.0 kHz as it approaches a wall.The bat detects beats such that the frequency of the echo is 900 Hz higher than the frequency the bat is emitting.The speed of sound in air is 340 m/s.The speed of the bat is closest to

The following four forces act on a 4.00 kg object: 1 = 300 N east 2 = 700 N north 3 = 500 N west 4 = 600 N south What is the acceleration of the object?

A spaceship approaches the earth with a speed 0.50c.A passenger in the spaceship measures his heartbeat as 70 beats per minute.What is his heartbeat rate according to an observer that is at rest relative to the earth?

Heat is added to a 2.0 kg piece of ice at a rate of 793.0 kW.How long will it take for the ice to melt if it was initially at 0.00°C? (The latent heat of fusion for water is 334 kJ/kg and its latent heat of vaporization is 2260 kJ/kg.)

If you set the cruise control of your car to a certain speed and take a turn,the speed of the car will remain the same.Is the car accelerating?

What is the angle between the vector = +3 - 2 - 3 And the +y-axis?

0) 00325 × 10^-8 cm can also be expressed in mm as

A laser emits light of wavelength 463 nm during a brief pulse that lasts for 25 ms and has a total energy of 1.2 J.How many photons are emitted in that single pulse? (c = 3.00 × 10⁸ m/s, H = 6.626 × 10^-34 J • s)

A block is on a frictionless horizontal table,on earth.This block accelerates at 1.9 m/s² when a 90 N horizontal force is applied to it.The block and table are then set up on the moon where the acceleration due to gravity is 1.62 m/s².What is the weight of the block on the moon?

The components of vector are A_x = +2.2 and A_y = -6.9,and the components of vector Are given are B_x = -6.1 and B_y = -2.2.What is the magnitude of the vector - ?

The following four forces act on a 4.00 kg object: ₁ = 300 N east ₂ = 700 N north ₃ = 500 N west ₄ = 600 N south What is the acceleration of the object?