#4 Exam Review Title page
Special topics in physics: Chapter 14: Fluids Density and pressure. Fluids at rest Pascals principle. Archimedes principle. Fluids in motion. Chapter 13: Gravitation Universal Law of Gravitation. Gravitation near the Earths surface. Gravitational potential energy. Keplers Laws Chapter 15: Oscillations SHM Energy conservation. Pendulums. Damping Forced oscillations and resonance.
Chapter 16: Waves Types of waves. Sinusoidal Traveling waves. Interference of waves. Standing waves. Resonance.
Practice Exam 4 - q1
Practice Exam 4 - q1
Practice Exam 4 - q2
Practice Exam 4 - q2
Practice Exam 4 - q3
Practice Exam 4 - q3s
Practice Exam 4 - q4
Practice Exam 4 - q4s
Practice Exam 4 - q5
Practice Exam 4 - q5
Practice Exam 4 - q6
Practice Exam 4 - q6
Practice Exam 4 - q7
Practice Exam 4 - q7
Practice Exam 4 - q8
Practice Exam 4 - q8
iclicker Question ch13-1
Two objects that may be considered point masses are initially separated by a distance d. The separation distance is then decreased to d/3. How does the gravitational force between these two objects change as a result of the decrease? A. The force will not change since it is only dependent on the masses of the objects. B. The force will be nine times larger than the initial value. C. The force will be three times larger than the initial value. D. The force will be one third of the initial value. E. The force will be one ninth of the initial value.
iclicker Question ch13-2
A planet is following a slightly elliptical orbit as it orbits the Sun. Which of the following explanations best explains why the planet moves faster in its orbit when it is closest to the Sun? A. Because no external forces are acting on the system, the total linear momentum of the system must be conserved. B. The gravitational attraction between the planet and the Sun results in a torque on the planet and the total angular momentum of the system is not conserved. C. Because no external torques are acting on the planet, the total angular momentum of the planet is conserved. D. Because the system is isolated, the total kinetic energy of the planet must be conserved. E. Because the mass of the planet is not uniformly distributed, the gravitational force on the planet will vary the most when it is far from the Sun and least when it is close to the Sun.
iclicker Question ch13-3
Choose the answer that best explains why astronauts in orbit in the space shuttle appear weightless: A. They are so far from the earth that the gravitational force on them is nearly zero. B. There is no atmosphere in space, hence, no gravitation. C. Their centripetal acceleration exactly matches their gravitational acceleration, so they are essentially in free fall. D. The space shuttle is equipped with anti-gravity superconducting magnets. E. Astronauts are subject to a strenuous weight loss program before departure.
iclicker Question ch13-4
A spacecraft coasts from the Earth toward the Moon without firing its rockets. Choose the answer that best describes the spacecrafts motion. A. B. C. D. The spacecraft speeds up during the entire trip. The spacecraft travels at constant speed during the entire trip. The spacecraft slows down during the entire trip. The spacecraft speeds up while the force of the Earth is stronger, then slows down while the force of the Moon is stronger. E. The spacecraft slows down while the force of the Earth is stronger, then speeds up while the force of the Moon is stronger.
iclicker Question ch13-5
The orbital period of Jupiter around the Sun is
A. shorter than the Earths orbital period mainly because the radius of Jupiters orbit is larger than that of the Earth. B. longer than the Earths orbital period mainly because the radius of Jupiters orbit is larger than that of the Earth. C. shorter than the Earths orbital period mainly because Jupiter is so much more massive than Earth. D. longer than the Earths orbital period mainly because Jupiter is so much more massive than Earth. E. not related to the Earths orbital period in any way.
iclicker Question ch14-1
In which one of the following cases is the pressure exerted on the ground by the man the largest? A. B. C. D. E. A man stands with both feet flat on the ground. A man stands with one foot flat on the ground. A man lies with his back flat on the ground. A man kneels with both knees on the ground. A man stands with the toes of one foot on the ground.
iclicker Question ch14-2
You dip a straw into a glass of your favorite beverage, place your finger over the top (an airtight seal) then lift the straw from the glass. The fluid stays in the straw as shown. In the space between your finger and the top of the fluid, the pressure must be A. B. C. D. E. a bit less than the ambient pressure. equal to the ambient pressure. a bit more than the ambient pressure. a perfect vacuum. This situation can never happen, the fluid will drain out.
iclicker Question ch14-3
A uniform U-tube is open at the top and has some water in it. Oil of unknown density is poured into the left side of the U-tube and makes a column as shown (the two fluids do not mix). The density of the oil is given by:
l A. !Oil = ! H 2 O d
B. !Oil = ! H 2 O C. !Oil D. !Oil E. !Oil
d l (d + l) = !H 2O l l = !H 2O (d + l) (l " d) = !H 2O (l + d)
iclicker Question ch14-4
A solid block of mass m is suspended in a liquid by a thread. The density of the block is greater than that of the liquid. Initially, the fluid level is such that the block is at a depth d and the tension in the thread is T. Then, the fluid level is decreased such that the depth is 0.5d. What is the tension in the thread after the depth is decreased?
A. B. C. D. E.
0.25T 0.50T T 2T 4T
iclicker Question ch14-5
A solid block of mass m is suspended in a container of liquid by a thread. The density of the block is greater than that of the liquid. The tension in the string is measured by a hanging scale, and a platform scale measures the normal force exerted by the container on that scale. If the block is removed from the liquid A. the reading on the tension scale increases, but the reading on the platform scale decreases. B. the reading on the tension scale increases, but the reading on the platform scale stays the same. C. the reading on the tension scale increases, and the reading on the platform scale increases. D. the reading of both scales stay constant. E. none of the above.
iclicker Question ch14-6
A glass is partially filled with pure water. An ice cube is then added (that floats on the surface) and the water level is measured to be h. Which one of the following statements is true concerning the level of water after the ice melts? A. B. C. D. E. The final level of water will be lower than h. The final level of water will be equal to h. The final level of water will be higher than h. This cannot be answered without knowing the mass of ice added. This cannot be answered without knowing the volume of ice added.
iclicker Question ch14-7
Consider the same glass of water except now there is a small piece of lead on top of the ice cube (not enough to make it sink). If the piece of lead were to fall off the ice cube and sink to the bottom of the glass, what would happen to the water level? a) The water level will rise. b) The water level will fall. c) The water level will remain the same.
iclicker Question ch15-1
Consider the oscillating mass spring system. At the moment the mass passes through the equilibrium point A. B. C. D. the speed and magnitude of acceleration are both at a maximum. the speed is at a maximum but the acceleration is zero. the speed and the acceleration are both zero. the speed is zero but the magnitude of the acceleration is at a maximum. E. none of the above.
iclicker Question ch15-2
Consider the oscillating mass spring system. At the moment the mass is at its maximum displacement A. B. C. D. the speed and magnitude of acceleration are both at a maximum. the speed is at a maximum the but acceleration is zero. the speed and the acceleration are both zero. the speed is zero but the magnitude of the acceleration is at a maximum. E. none of the above.
iclicker Question ch15-3
Consider the oscillating mass spring system. At the moment the mass passes through the equilibrium point A. the potential energy and kinetic energy are both at a maximum. B. the potential energy is at a maximum but the kinetic energy is zero. C. the potential energy and the kinetic energy are both zero. D. the potential energy is zero but the kinetic energy is at a maximum. E. none of the above.
iclicker Question ch15-4
Consider the oscillating mass spring system. At the moment the mass is at its maximum displacement A. the potential energy and kinetic energy are both at a maximum. B. the potential energy is at a maximum but the kinetic energy is zero. C. the potential energy and the kinetic energy are both zero. D. the potential energy is zero but the kinetic energy is at a maximum. E. none of the above.
iclicker Question ch15-5
The mass of a pendulum bob is m. Similarly, the mass of a block attached to a spring is also m. Both the pendulum and the block oscillate at the same period. What effect would there be on these two systems if the mass of the block and the mass of the pendulum were both increased to 2m? A. B. C. D. E. The period of both systems would decrease. The period of both systems would increase. The period of the block decreases, but the period of the pendulum is unchanged. The period of the pendulum decreases, but the period of the block is unchanged. The period of the block increases, but the period of the pendulum is unchanged.
T = 2!
m k
T = 2! L g
iclicker Question ch15-6
A pendulum bob consists of a hollow spherical shell initially filled with fine sand. There is a small hole in the bottom of the sphere, so that while the pendulum oscillates, the sand slowly leaks out. The period of the pendulum is closely monitored during this time. Assume the amplitude of the motion is constant. The period of the pendulum
T = 2! gradually increases while the sand leaks out. g doesnt change while the sand leaks out. gradually decreases while the sand leaks out. gradually increases until the sphere is half full of sand, then gradually decreases to the original value when the sphere is empty. E. gradually decreases until the sphere is half full of sand, then gradually increases to the original value when the sphere is empty.
A. B. C. D.
L
iclicker Question ch15-7
Choose the best explanation for the collapse of the Tacoma Narrows Bridge:
A. The engineers failed to make the bridge strong enough to withstand the high winds in the region. B. The concrete of the bridge was not sufficiently reinforced with steel. C. The engineers failed to include damping mechanisms at the natural frequencies of vibration of the bridge. D. Some of the engineers failed to pay sufficient attention in their introductory physics class (i.e., reading the school newspaper during lectures, or leaving the lectures early.) E. Both C and D.
iclicker Question ch16-1
A transverse wave is traveling from left to right along a string. The drawing below represents a section of the string at one instant in time. At the instant shown, which of the following statements correctly describes the motion of the particles that compose the string in segments A and B?
A. In segment A the particles are moving downward and in segment B the particles are moving upward. B. In segment A the particles are moving upward and in segment B the particles are moving upward. C. In segment A the particles are moving downward and in segment B the particles are moving downward. D. In segment A the particles are moving upward and in segment B the particles are moving downward. E. In segment A the particles are moving toward the left and in segment B the particles are moving toward the right.
iclicker Question ch16-2
The drawing shows the vertical position of points along a string versus distance as a wave travels along the string. Six points on the wave are labeled A, B, C, D, E, and F. Between which two points is the length of the segment equal to one wavelength? A. B. C. D. E. A to E B to D A to C A to F C to F
iclicker Question ch16-3
Which one of the following statements correctly describes the wave shown, where distances are measured in meters and time is measured in ! & #! seconds? y(x,t) = 2.50 sin % x " t ( $2 6 ' A. The wave is traveling in the +x direction with an amplitude of 2.50 m and a wavelength of !/2 m. B. The wave is traveling in the "x direction with an amplitude of 2.50 m and a wavelength of !/2 m. C. The wave is traveling in the +x direction with an amplitude of 2.50 m and a wave number of !/2 m-1. D. The wave is ...