PHY111 FINAL EXAM QUESTIONS
WITH COMPLETE SOLUTIONS
The law of conservation of mass states that: - ANSWERSMass cannot be created or
destroyed
What is the best definition of pressure? - ANSWERSMass per Area
What is the equation for volumetric fluid flow rate? - ANSWERSQ = V/t
A pipe with some radius has fluid moving through it with velocity v. The radius of the
pipe halves. Which statement is most accurate? - ANSWERSSince mass must be
conserved, all the mass that enters the pipe every second must equal the mass that
exits the pipe every second. The fluid flow rate will remain the same.
What is the equation for Poiseuille's Law, or the equation for laminar flow in a pipe? -
ANSWERSQ = (delta)P(pi)r^(nu)(l)
Describe the effect on the flow rate when the radius of the pipe decreases. -
ANSWERSThe flow rate decreases
Describe the effect on the flow rate when the length of the pipe decreases. -
ANSWERSThe flow rate will increase
Describe the effect on the flow rate when the fluid viscosity decreases. - ANSWERSThe
flow rate will increase
Describe the effect on the flow rate when the pressure difference decreases. -
ANSWERSThe flow rate will decrease.
What conditions must be met for a system to experience a constant velocity? -
ANSWERSThere must be no net force on the system.
A student places a block of wood in a bucket of water. The block of wood floats so that
half of the volume is below the water line and half the wood is above the water line.
What is accurate about this relationship? - ANSWERSThe upward force of the water is
equal to the weight of the wood.
What is the definition of density? - ANSWERSMass / Volume
A particular metal block has a mass of m and a volume of V. A student obtains the
same metal that has a mass of 1/2 m. The volume of the sample must be: -
ANSWERSLess than V.
, A student has two blocks each with a different mass by the same volume. Block 1 has
double the density of block 2. Both blocks are suspended from a force sensor and
completely submerged in water. Which of the following is a correct statement? -
ANSWERSThe reading on sensor 1 will be larger than the reading on sensor 2.
A student has two blocks each with the same mass but different volumes. Block 1 has
double the density of block 2. Both blocks are suspended from a force sensor
completely submerged in water. Which of the following is a correct statement? -
ANSWERSThe reading on sensor 1 will be larger than the reading on sensor 2.
A student places a block of wood in a bucket of water where the block floats half above
the surface. The student then places a second, larger block of wood in the bucket. The
second block of wood also floats half above the surface. Which statement is true? -
ANSWERSThe buoyant force on the larger block of wood is greater than the buoyant
force on the smaller block of wood.
Loudness is determined by a sound wave's: - ANSWERSAmplitude
A student places two copper cubes with equal dimensions in a bucket of water. Both
copper blocks sink to the bottom of the bucket. The first cube is solid copper and the
second copper cube is hollow. What statement is accurate? - ANSWERSBoth cubes
experience the same, non-zero buoyant force.
What is an example of an oscillating object? - ANSWERSThe vibration of a string, a
guard marching back and forth between two points, a child swinging on a swing set
What is the best definition of an oscillation period? - ANSWERSThe time to complete
one oscillation
Period and frequency have an ___________ relationship. - ANSWERSInverse
Examples of longitudinal waves include: - ANSWERSSound, transmission of an
earthquake
A student holding one end of a rope moves her hand up and down creating waves with
some frequency f. She then speeds up the movement of her hand in order to create
waves with some frequency 2f. What effect does this have in the a) wavelength b)
period and c) wave speed? - ANSWERS
What best defines "spring constant?" - ANSWERSForce per m of stretch or
compression
The slope of a position vs. time graph is best defined as: - ANSWERSVelocity
WITH COMPLETE SOLUTIONS
The law of conservation of mass states that: - ANSWERSMass cannot be created or
destroyed
What is the best definition of pressure? - ANSWERSMass per Area
What is the equation for volumetric fluid flow rate? - ANSWERSQ = V/t
A pipe with some radius has fluid moving through it with velocity v. The radius of the
pipe halves. Which statement is most accurate? - ANSWERSSince mass must be
conserved, all the mass that enters the pipe every second must equal the mass that
exits the pipe every second. The fluid flow rate will remain the same.
What is the equation for Poiseuille's Law, or the equation for laminar flow in a pipe? -
ANSWERSQ = (delta)P(pi)r^(nu)(l)
Describe the effect on the flow rate when the radius of the pipe decreases. -
ANSWERSThe flow rate decreases
Describe the effect on the flow rate when the length of the pipe decreases. -
ANSWERSThe flow rate will increase
Describe the effect on the flow rate when the fluid viscosity decreases. - ANSWERSThe
flow rate will increase
Describe the effect on the flow rate when the pressure difference decreases. -
ANSWERSThe flow rate will decrease.
What conditions must be met for a system to experience a constant velocity? -
ANSWERSThere must be no net force on the system.
A student places a block of wood in a bucket of water. The block of wood floats so that
half of the volume is below the water line and half the wood is above the water line.
What is accurate about this relationship? - ANSWERSThe upward force of the water is
equal to the weight of the wood.
What is the definition of density? - ANSWERSMass / Volume
A particular metal block has a mass of m and a volume of V. A student obtains the
same metal that has a mass of 1/2 m. The volume of the sample must be: -
ANSWERSLess than V.
, A student has two blocks each with a different mass by the same volume. Block 1 has
double the density of block 2. Both blocks are suspended from a force sensor and
completely submerged in water. Which of the following is a correct statement? -
ANSWERSThe reading on sensor 1 will be larger than the reading on sensor 2.
A student has two blocks each with the same mass but different volumes. Block 1 has
double the density of block 2. Both blocks are suspended from a force sensor
completely submerged in water. Which of the following is a correct statement? -
ANSWERSThe reading on sensor 1 will be larger than the reading on sensor 2.
A student places a block of wood in a bucket of water where the block floats half above
the surface. The student then places a second, larger block of wood in the bucket. The
second block of wood also floats half above the surface. Which statement is true? -
ANSWERSThe buoyant force on the larger block of wood is greater than the buoyant
force on the smaller block of wood.
Loudness is determined by a sound wave's: - ANSWERSAmplitude
A student places two copper cubes with equal dimensions in a bucket of water. Both
copper blocks sink to the bottom of the bucket. The first cube is solid copper and the
second copper cube is hollow. What statement is accurate? - ANSWERSBoth cubes
experience the same, non-zero buoyant force.
What is an example of an oscillating object? - ANSWERSThe vibration of a string, a
guard marching back and forth between two points, a child swinging on a swing set
What is the best definition of an oscillation period? - ANSWERSThe time to complete
one oscillation
Period and frequency have an ___________ relationship. - ANSWERSInverse
Examples of longitudinal waves include: - ANSWERSSound, transmission of an
earthquake
A student holding one end of a rope moves her hand up and down creating waves with
some frequency f. She then speeds up the movement of her hand in order to create
waves with some frequency 2f. What effect does this have in the a) wavelength b)
period and c) wave speed? - ANSWERS
What best defines "spring constant?" - ANSWERSForce per m of stretch or
compression
The slope of a position vs. time graph is best defined as: - ANSWERSVelocity
