Phys 1010 final Exam Questions With
Complete Solutions
/. If a truck accelerates from rest to 60 mph in 9 seconds, what is the truck's average
acceleration? The unit mph stands for "miles per hour." 1 mile is 1.6 km. - Answer-about
3 m/s^2
/.General relativity is the physics framework to understand gravity as a geometrical
property of space-time. Which of the following phenomena is consistent with theory of
the general relativity?
(A)
the equival
ence of mass and energy, famously known as
" E=mc^2
(B
)
time dilation where clocks tick slower in a moving frame
with relativistic
speed
(speed near the speed of light)
.
(C)
length co
ntraction in which the length of an object
moving at relativistic
speed
(speed near the speed of
light) becomes shorter
.
(D)
time invariance in which the speed of light is assumed to
be constant in all inertial reference frame.
(E)
gravitational lensing wh
ere bright stars or galaxies
behind a massive celestial object can appear as
multiple elongated arc shapes
. - Answer-gravitational lensing where bright stars or galaxies behind a massive celestial
object can appear as multiple elongated arc shapes.
/.Which of the following reference frame is an example of inertial reference frame?
(A)
Reference frame that is moving with a space shu
,ttle that
is in orbit
.
(B)
Reference
frame that is moving with an airplane
flying at the constant speed of 500 mph horizontally
at a high altitude
.
(C)
Reference frame that is moving with a roller coaster that
is going through a looptheloop.
(D)
Reference frame that is moving with an automobile that
is accelerating along a straight line
.
(E)
Any reference frame where the observer is. - Answer-(B)
Reference
frame that is moving with an airplane
flying at the constant speed of 500 mph horizontally
at a high altitude
.
/.A 1300 kg car is moving at a constant speed 60 mph. The driver
suddenly steps on the brake and the
road surface exerts a
constant friction force of 11 kN on the car. How far will the car
travel before it stops after the brake? Note that 1 mile is 1.6 km. - Answer-about 42 m
/.A 10 cm
×
10 cm
×
10 cm cube of heavy metal is at the bottom
of a water tank. The pressure at the bottom of the cube is
(A)
larger than the pressure on the top of the cube.
(B)
less than the pressure on the top of the cube.
(C)
equal to the pressure on the top o
f the cube.
(D
)
equal to the weight of the displaced water.
,(E)
equal to the weight of the metal cube. - Answer-(A)
larger than the pressure on the top of the cube
/.If an object of mass 2 kg is held 10 m above the floor,
(A)
the object's kinetic energy is about 100 J.
(B)
the object's gravitational po
tential energy is zero.
(C)
the object's gravitational potential energy is about 100 J.
(D)
the object's kinetic energy is about 200 J.
(E)
the object's gravitational potential energy is about
200 J. - Answer-(E)
the object's gravitational potential energy is about
200 J
/.You are cooking a meal in your kitchen and
have just put a pot
of frozen soup on the stove to defrost. After a while, the soup is
liquid and has begun to boil. Describe the soup's temperature as
it boils, assuming for simplicity that the soup is pure water.
(A)
The soup's temperature increases at
an accelerating pace
as its liquid boils away.
(B)
The soup's temperature increases steadily as its liquid
boils away
.
(C
)
The soup's temperature is constant as it boils because
liquid water and gaseous water can coexist only at
water's boiling temperatur
e
.
(D)
The soup's temperature is approximately constant as
it boils because nearly all of the heat that is flowing
into the soup is being used to convert liquid water
into gaseous water.
(E)
, The soup's temperature increases at a faster rate after it
starts
to boil. - Answer-The soup's temperature is approximately constant as
it boils because nearly all of the heat that is flowing
into the soup is being used to convert liquid water
into gaseous water
/.On an atomic level, heat is
(A)
chemical energy.
(B
)
potential energy.
(C)
mass energy.
(D)
kinetic energy.
(E)
radiation energy - Answer-kinetic energy
/.A 1500 kg boat is floating in the harbor. What is the mass of
water displaced by the boat? - Answer-1500 kg
/.A pendulum bob of mass 2 kg is swinging above the floor. If the
height of the pendulum bob from the floor varies from the lowest
2.7 m to the highest 2.9 m as it swings, the ma
ximum speed of
the pendulum bob is - Answer-about 2 m/s
/.Steam at 100
C is more dangerous than the same mass of water
at 100
C because
(A)
the steam is gas and gas is a bett
er heat conductor than
liquid.
(B)
the steam has a higher specific heat
(C)
the steam releases a great deal of heat when it
condenses
(D)
mass density of steam is less than that of water
Complete Solutions
/. If a truck accelerates from rest to 60 mph in 9 seconds, what is the truck's average
acceleration? The unit mph stands for "miles per hour." 1 mile is 1.6 km. - Answer-about
3 m/s^2
/.General relativity is the physics framework to understand gravity as a geometrical
property of space-time. Which of the following phenomena is consistent with theory of
the general relativity?
(A)
the equival
ence of mass and energy, famously known as
" E=mc^2
(B
)
time dilation where clocks tick slower in a moving frame
with relativistic
speed
(speed near the speed of light)
.
(C)
length co
ntraction in which the length of an object
moving at relativistic
speed
(speed near the speed of
light) becomes shorter
.
(D)
time invariance in which the speed of light is assumed to
be constant in all inertial reference frame.
(E)
gravitational lensing wh
ere bright stars or galaxies
behind a massive celestial object can appear as
multiple elongated arc shapes
. - Answer-gravitational lensing where bright stars or galaxies behind a massive celestial
object can appear as multiple elongated arc shapes.
/.Which of the following reference frame is an example of inertial reference frame?
(A)
Reference frame that is moving with a space shu
,ttle that
is in orbit
.
(B)
Reference
frame that is moving with an airplane
flying at the constant speed of 500 mph horizontally
at a high altitude
.
(C)
Reference frame that is moving with a roller coaster that
is going through a looptheloop.
(D)
Reference frame that is moving with an automobile that
is accelerating along a straight line
.
(E)
Any reference frame where the observer is. - Answer-(B)
Reference
frame that is moving with an airplane
flying at the constant speed of 500 mph horizontally
at a high altitude
.
/.A 1300 kg car is moving at a constant speed 60 mph. The driver
suddenly steps on the brake and the
road surface exerts a
constant friction force of 11 kN on the car. How far will the car
travel before it stops after the brake? Note that 1 mile is 1.6 km. - Answer-about 42 m
/.A 10 cm
×
10 cm
×
10 cm cube of heavy metal is at the bottom
of a water tank. The pressure at the bottom of the cube is
(A)
larger than the pressure on the top of the cube.
(B)
less than the pressure on the top of the cube.
(C)
equal to the pressure on the top o
f the cube.
(D
)
equal to the weight of the displaced water.
,(E)
equal to the weight of the metal cube. - Answer-(A)
larger than the pressure on the top of the cube
/.If an object of mass 2 kg is held 10 m above the floor,
(A)
the object's kinetic energy is about 100 J.
(B)
the object's gravitational po
tential energy is zero.
(C)
the object's gravitational potential energy is about 100 J.
(D)
the object's kinetic energy is about 200 J.
(E)
the object's gravitational potential energy is about
200 J. - Answer-(E)
the object's gravitational potential energy is about
200 J
/.You are cooking a meal in your kitchen and
have just put a pot
of frozen soup on the stove to defrost. After a while, the soup is
liquid and has begun to boil. Describe the soup's temperature as
it boils, assuming for simplicity that the soup is pure water.
(A)
The soup's temperature increases at
an accelerating pace
as its liquid boils away.
(B)
The soup's temperature increases steadily as its liquid
boils away
.
(C
)
The soup's temperature is constant as it boils because
liquid water and gaseous water can coexist only at
water's boiling temperatur
e
.
(D)
The soup's temperature is approximately constant as
it boils because nearly all of the heat that is flowing
into the soup is being used to convert liquid water
into gaseous water.
(E)
, The soup's temperature increases at a faster rate after it
starts
to boil. - Answer-The soup's temperature is approximately constant as
it boils because nearly all of the heat that is flowing
into the soup is being used to convert liquid water
into gaseous water
/.On an atomic level, heat is
(A)
chemical energy.
(B
)
potential energy.
(C)
mass energy.
(D)
kinetic energy.
(E)
radiation energy - Answer-kinetic energy
/.A 1500 kg boat is floating in the harbor. What is the mass of
water displaced by the boat? - Answer-1500 kg
/.A pendulum bob of mass 2 kg is swinging above the floor. If the
height of the pendulum bob from the floor varies from the lowest
2.7 m to the highest 2.9 m as it swings, the ma
ximum speed of
the pendulum bob is - Answer-about 2 m/s
/.Steam at 100
C is more dangerous than the same mass of water
at 100
C because
(A)
the steam is gas and gas is a bett
er heat conductor than
liquid.
(B)
the steam has a higher specific heat
(C)
the steam releases a great deal of heat when it
condenses
(D)
mass density of steam is less than that of water
