Structural mobility occurs when:
Answer: a large group moves up or down the class ladder due to societal changes
In the United States, most people define themselves as:
In the United States, most people define themselves as:
Answer: middle class
Based on meritocracy, a physician's assistant would:
Based on meritocracy, a physician's assistant would:
Answer: earn a pay raise for doing excellent work
Which statement illustrates low status consistency?
Which statement illustrates low status consistency?
Answer: A college dropout launches an online company that earns millions in its first year.
Which person best illustrates opportunities for upward social mobility in the United States?
Which person best illustrates opportunities for upward social mobility in the United States?
Answer: First-generation college student
What factor makes class systems open?
What factor makes class systems open?
Answer: They allow for movement between the classes.
What factor makes caste systems closed?
What factor makes caste systems closed?
Answer: People cannot change their social standings.
When all media sources report a simplified version of the environmental impact of hydraulic fracturing, with no effort to convey the hard science and complicated statistical data behind the story, ___________ is probably occurring.
When all media sources report a simplified version of the environmental impact of hydraulic fracturing, with no effort to convey the hard science and complicated statistical data behind the story, ___________ is probably occurring.
Answer: gatekeeping
When it comes to media and technology, a functionalist would focus on:
When it comes to media and technology, a functionalist would focus on:
Answer: the way that various forms of media socialize users
_______ tend to be more pro-technology, while _______ view technology as a symbol of the coldness of modern life.
_______ tend to be more pro-technology, while _______ view technology as a symbol of the coldness of modern life.
Answer: technophiles; Luddites
The use of Facebook to create an online persona by only posting images that match your ideal self exemplifies the_____________ that can occur in forms of new media.
The use of Facebook to create an online persona by only posting images that match your ideal self exemplifies the_____________ that can occur in forms of new media.
Answer: social construction of reality
A parent secretly monitoring the babysitter through the use of GPS, site blocker, and nanny cam is a good example of:
A parent secretly monitoring the babysitter through the use of GPS, site blocker, and nanny cam is a good example of:
Answer: panoptic surveillance
The government of __________ blocks citizens' access to popular new media sites like Facebook, YouTube, and Twitter.
The government of __________ blocks citizens' access to popular new media sites like Facebook, YouTube, and Twitter.
Answer: China
The movie Babel featured an international cast and was filmed on location in various nations. When it screened in theaters worldwide, it introduced a number of ideas and philosophies about cross-cultural connections. This might be an example of:
The movie Babel featured an international cast and was filmed on location in various nations. When it screened in theaters worldwide, it introduced a number of ideas and philosophies about cross-cultural connections. This might be an example of:
Answer: media globalization
In the mid-90s, the U.S. government grew concerned that Microsoft was a _______________, exercising disproportionate control over the available choices and prices of computers.
In the mid-90s, the U.S. government grew concerned that Microsoft was a _______________, exercising disproportionate control over the available choices and prices of computers.
Answer: monopoly
When Japanese scientists develop a new vaccine for swine flu and offer that technology to U.S. pharmaceutical companies, __________ has taken place.
When Japanese scientists develop a new vaccine for swine flu and offer that technology to U.S. pharmaceutical companies, __________ has taken place.
Answer: technological diffusion
Comic books, Wikipedia, MTV, and a commercial for Coca-Cola are all examples of:
Comic books, Wikipedia, MTV, and a commercial for Coca-Cola are all examples of:
Answer: media
Research regarding video game violence suggests that _________.
Research regarding video game violence suggests that _________.
Answer: violent video games lead to an increase in aggressive thought and behavior
Which of the following is the primary component of the evolutionary model of technological change?
Which of the following is the primary component of the evolutionary model of technological change?
Answer: A breakthrough in one form of technology leads to a number of variations, and technological developments.
If the U.S. Patent Office were to issue a patent for a new type of tomato that tastes like a jellybean, it would be issuing a _________ patent?
If the U.S. Patent Office were to issue a patent for a new type of tomato that tastes like a jellybean, it would be issuing a _________ patent?
Answer: plant patent
When it comes to technology, media, and society, which of the following is true?
When it comes to technology, media, and society, which of the following is true?
Answer: Technology, media, and society are bound and cannot be separated.
The history of technology began _________.
The history of technology began _________.
Answer: in the early stages of human societies
The fact that your cell phone is using outdated technology within a year or two of purchase is an example of ____________.
The fact that your cell phone is using outdated technology within a year or two of purchase is an example of ____________.
Answer: planned obsolescence
The ________ can be directly attributed to the digital divide, because differential ability to access the internet leads directly to a differential ability to use the knowledge found on the Internet.
The ________ can be directly attributed to the digital divide, because differential ability to access the internet leads directly to a differential ability to use the knowledge found on the Internet.
Answer: knowledge gap
Jerome is able to use the Internet to select reliable sources for his research paper, but Charlie just copies large pieces of web pages and pastes them into his paper. Jerome has _____________ while Charlie does not.
Jerome is able to use the Internet to select reliable sources for his research paper, but Charlie just copies large pieces of web pages and pastes them into his paper. Jerome has _____________ while Charlie does not.
Answer: e-readiness
In a game of pool, the white cue ball hits the #5 ball and stops, while the #5 ball moves away with the same velocity as the cue ball had originally. The type of collision is
In a game of pool, the white cue ball hits the #5 ball and stops, while the #5 ball moves away with the same velocity as the cue ball had originally. The type of collision is
Answer: elastic
In an elastic collision, if the momentum is conserved, then which of the following statements is true about kinetic energy?
In an elastic collision, if the momentum is conserved, then which of the following statements is true about kinetic energy?
Answer: Kinetic energy is also conserved
A 3.0-kg object moves to the right at 4.0 m/s. It collides in a perfectly inelastic collision with a 6.0 kg object moving to the left at 2.0 m/s. What is the total kinetic energy after the collision?
A 3.0-kg object moves to the right at 4.0 m/s. It collides in a perfectly inelastic collision with a 6.0 kg object moving to the left at 2.0 m/s. What is the total kinetic energy after the collision?
Answer: 0 J
Two objects collide and stick together. Kinetic energy
Two objects collide and stick together. Kinetic energy
Answer: is definitely not conserved
If you pitch a baseball with twice the kinetic energy you gave it in the previous pitch, the magnitude of its momentum is
If you pitch a baseball with twice the kinetic energy you gave it in the previous pitch, the magnitude of its momentum is
Answer: 1.41 times as much
When is kinetic energy conserved?
When is kinetic energy conserved?
Answer: in elastic collisions
In an inelastic collision, if the momentum is conserved, then which of the following statements is true about kinetic energy?
In an inelastic collision, if the momentum is conserved, then which of the following statements is true about kinetic energy?
Answer: Kinetic energy is lost
A golf ball traveling 3.0 m/s to the right collides in a head-on collision with a stationary bowling ball in a friction-free environment. If the collision is almost perfectly elastic, the speed of the golf ball immediately after the collision is
A golf ball traveling 3.0 m/s to the right collides in a head-on collision with a stationary bowling ball in a friction-free environment. If the collision is almost perfectly elastic, the speed of the golf ball immediately after the collision is
Answer: slightly less than 3.0 m/s
What condition or conditions are necessary for rotational equilibrium?
What condition or conditions are necessary for rotational equilibrium?
Answer: ΣT = 0
What condition or conditions are necessary for static equilibrium?
What condition or conditions are necessary for static equilibrium?
Answer: ΣFx = 0, ΣFy = 0, ΣT = 0
A sailboat of mass m is moving with a momentum p. How would you represent its kinetic energy in terms of these two quantities?
A sailboat of mass m is moving with a momentum p. How would you represent its kinetic energy in terms of these two quantities?
Answer: p2/(2m)
A person weighing 800 N stands with one foot on each of two bathroom scales. Which statement is definitely true?
A person weighing 800 N stands with one foot on each of two bathroom scales. Which statement is definitely true?
Answer: If one scale reads 500 N, the other will read 300 N.
A 3.0-kg object moves to the right at 4.0 m/s. It collides in a perfectly elastic collision with a 6.0 kg object moving to the left at 2.0 m/s. What is the total kinetic energy after the collision?
A 3.0-kg object moves to the right at 4.0 m/s. It collides in a perfectly elastic collision with a 6.0 kg object moving to the left at 2.0 m/s. What is the total kinetic energy after the collision?
Answer: 36 J
A car goes around a curve of radius r at a constant speed v. What is the direction of the net force on the car?
A car goes around a curve of radius r at a constant speed v. What is the direction of the net force on the car?
Answer: toward the curve's center
When a car makes a sharp left turn, what causes the passengers to move toward the right side of the car?
When a car makes a sharp left turn, what causes the passengers to move toward the right side of the car?
Answer: inertia
When an object is moving with uniform circular motion, the object's tangential speed
When an object is moving with uniform circular motion, the object's tangential speed
Answer: is constant
Is it possible for an object moving around a circular path to have both centripetal and tangential acceleration?
Is it possible for an object moving around a circular path to have both centripetal and tangential acceleration?
Answer: Yes, this is possible if the speed is changing
What type of acceleration does an object moving with constant speed in a circular path experience?
What type of acceleration does an object moving with constant speed in a circular path experience?
Answer: centripetal acceleration
When an object experiences uniform circular motion, the direction of the acceleration is
When an object experiences uniform circular motion, the direction of the acceleration is
Answer: is directed toward the center of the circular path
Consider a particle moving with constant speed such that its acceleration of constant magnitude is always perpendicular to its velocity.
Consider a particle moving with constant speed such that its acceleration of constant magnitude is always perpendicular to its velocity.
Answer: It is moving in a circle
The movement of an object or a point mass at a constant speed around a circle that has a fixed radius is called uniform:
The movement of an object or a point mass at a constant speed around a circle that has a fixed radius is called uniform:
Answer: circular motion
A pilot executes a vertical dive then follows a semi-circular arc until it is going straight up. Just as the plane is at its lowest point, the force on him is
A pilot executes a vertical dive then follows a semi-circular arc until it is going straight up. Just as the plane is at its lowest point, the force on him is
Answer: more than mg, and pointing up
What force is needed to make an object move in a circle?
What force is needed to make an object move in a circle?
Answer: centripetal force
A roller coaster car is on a track that forms a circular loop in the vertical plane. If the car is to just maintain contact with track at the top of the loop, what is the minimum value for its centripetal acceleration at this point?
A roller coaster car is on a track that forms a circular loop in the vertical plane. If the car is to just maintain contact with track at the top of the loop, what is the minimum value for its centripetal acceleration at this point?
Answer: g downward
When an object experiences uniform circular motion, the direction of the net force is
When an object experiences uniform circular motion, the direction of the net force is
Answer: is directed toward the center of the circular path
Is it possible for an object moving with a constant speed to accelerate? Explain.
Is it possible for an object moving with a constant speed to accelerate? Explain.
Answer: Yes, although the speed is constant, the direction of the velocity can be changing
When an object is moving with uniform circular motion, the centripetal acceleration of the object
When an object is moving with uniform circular motion, the centripetal acceleration of the object
Answer: is directed toward the center of motion
A roller coaster car (mass = M) is on a track that forms a circular loop (radius = r) in the vertical plane. If the car is to just maintain contact with the track at the top of the loop, what is the minimum value for its speed at that point?
A roller coaster car (mass = M) is on a track that forms a circular loop (radius = r) in the vertical plane. If the car is to just maintain contact with the track at the top of the loop, what is the minimum value for its speed at that point?
Answer: (rg)1/2
A car of mass m goes around a banked curve of radius r with speed v. If the road is frictionless due to ice, the car can still negotiate the curve if the horizontal component of the normal force on the car from the road is equal in magnitude to
A car of mass m goes around a banked curve of radius r with speed v. If the road is frictionless due to ice, the car can still negotiate the curve if the horizontal component of the normal force on the car from the road is equal in magnitude to
Answer: mv2/r
A ball is whirled on a string, then the string breaks. What causes the ball to move off in a straight line?
A ball is whirled on a string, then the string breaks. What causes the ball to move off in a straight line?
Answer: inertia
A car goes around a curve of radius r at a constant speed v. Then it goes around the same curve at half of the original speed. What is the centripetal force on the car as it goes around the curve for the second time, compared to the first time?
A car goes around a curve of radius r at a constant speed v. Then it goes around the same curve at half of the original speed. What is the centripetal force on the car as it goes around the curve for the second time, compared to the first time?
Answer: one-fourth as big
An object moves in a circular path at a constant speed. Compare the direction of the object's velocity and acceleration vectors.
An object moves in a circular path at a constant speed. Compare the direction of the object's velocity and acceleration vectors.
Answer: The vectors are perpendicular
What is the term for the net force directed toward the center of an object's circular path?
What is the term for the net force directed toward the center of an object's circular path?
Answer: centripetal force
A coin of mass m rests on a turntable a distance r from the axis of rotation. The turntable rotates with a frequency of f. What is the minimum coefficient of static friction between the turntable and the coin if the coin is not to slip?
A coin of mass m rests on a turntable a distance r from the axis of rotation. The turntable rotates with a frequency of f. What is the minimum coefficient of static friction between the turntable and the coin if the coin is not to slip?
Answer: (4p2f2r)/g
A car goes around a curve of radius r at a constant speed v. Then it goes around a curve of radius 2r at speed 2v. What is the centripetal force on the car as it goes around the second curve, compared to the first?
A car goes around a curve of radius r at a constant speed v. Then it goes around a curve of radius 2r at speed 2v. What is the centripetal force on the car as it goes around the second curve, compared to the first?
Answer: twice as big
Why does an astronaut weigh less on the moon than on Earth?
Why does an astronaut weigh less on the moon than on Earth?
Answer: The gravitational field strength is less on the moon's surface than on Earth's surface
The gravitational force between two objects is inversely proportional to
The gravitational force between two objects is inversely proportional to
Answer: the square of the distance between the two objects
The acceleration of gravity on the Moon is one-sixth what it is on Earth. The radius of the Moon is one-fourth that of the Earth. What is the Moon's mass compared to the Earth's?
The acceleration of gravity on the Moon is one-sixth what it is on Earth. The radius of the Moon is one-fourth that of the Earth. What is the Moon's mass compared to the Earth's?
Answer: 1/96
Two planets have the same surface gravity, but planet B has twice the radius of planet A. If planet A has mass m, what is the mass of planet B?
Two planets have the same surface gravity, but planet B has twice the radius of planet A. If planet A has mass m, what is the mass of planet B?
Answer: 4m
The gravitational force between two masses is 36 N. What is the gravitational force if the distance between them is tripled? (G = 6.673×10-11 Nm2/kg2)
The gravitational force between two masses is 36 N. What is the gravitational force if the distance between them is tripled? (G = 6.673×10-11 Nm2/kg2)
Answer: 4.0 N
As a rocket moves away from the Earth's surface, the rocket's weight
As a rocket moves away from the Earth's surface, the rocket's weight
Answer: decreases
According to Kepler's second law of planetary motion,
According to Kepler's second law of planetary motion,
Answer: the speed of a planet is greatest when it is closest to the Sun
A hypothetical planet has a mass of half that of the Earth and a radius of twice that of the Earth. What is the acceleration due to gravity on the planet in terms of g, the acceleration due to gravity at the Earth?
A hypothetical planet has a mass of half that of the Earth and a radius of twice that of the Earth. What is the acceleration due to gravity on the planet in terms of g, the acceleration due to gravity at the Earth?
Answer: g/8
A planet is discovered to orbit around a star in the galaxy Andromeda, with the same orbital diameter as the Earth around our Sun. If that star has 4 times the mass of our Sun, what will the period of revolution of that new planet be, compared to the Earth's orbital period?
A planet is discovered to orbit around a star in the galaxy Andromeda, with the same orbital diameter as the Earth around our Sun. If that star has 4 times the mass of our Sun, what will the period of revolution of that new planet be, compared to the Earth's orbital period?
Answer: one-half as much
A space probe is directly between two moons of a planet. If it is twice as far from moon A as it is from moon B, but the net force on the probe is zero, what can be said about the relative masses of the moons?
A space probe is directly between two moons of a planet. If it is twice as far from moon A as it is from moon B, but the net force on the probe is zero, what can be said about the relative masses of the moons?
Answer: Moon A is four times as massive as moon B
Which of the following equations expresses Newton's law of universal gravitation?
Which of the following equations expresses Newton's law of universal gravitation?
Answer: F=(Gm1m2)/r^2
Two planets have the same surface gravity, but planet B has twice the mass of planet A. If planet A has radius r, what is the radius of planet B?
Two planets have the same surface gravity, but planet B has twice the mass of planet A. If planet A has radius r, what is the radius of planet B?
Answer: 1.41r
When calculating the gravitational force between two extended bodies, you should measure the distance
When calculating the gravitational force between two extended bodies, you should measure the distance
Answer: from the center of each body
Let the average orbital radius of a planet be r. Let the orbital period be T. What quantity is constant for all planets orbiting the Sun?
Let the average orbital radius of a planet be r. Let the orbital period be T. What quantity is constant for all planets orbiting the Sun?
Answer: T2/R3
In this course which of the following symbols represents the constant of universal gravitation?
In this course which of the following symbols represents the constant of universal gravitation?
Answer: G
The equation for the speed of an object in circular orbit is v1= ((G)(m/r))^1/2 . What does m represent in this equation?
The equation for the speed of an object in circular orbit is v1= ((G)(m/r))^1/2 . What does m represent in this equation?
Answer: the mass of the central object
Compared to its mass on the Earth, the mass of an object on the Moon is
Compared to its mass on the Earth, the mass of an object on the Moon is
Answer: the same
The gravitational force between two objects is proportional to
The gravitational force between two objects is proportional to
Answer: the product of the two objects
Satellite A has twice the mass of satellite B, and rotates in the same orbit. Compare the two satellite's speeds.
Satellite A has twice the mass of satellite B, and rotates in the same orbit. Compare the two satellite's speeds.
Answer: The speed of B is equal to the speed of A
Who was the first person to realize that the planets move in elliptical paths around the Sun?
Who was the first person to realize that the planets move in elliptical paths around the Sun?
Answer: Kepler
In this course, which of the following symbols represents gravitational field strength?
In this course, which of the following symbols represents gravitational field strength?
Answer: g
The speed of Halley's Comet, while traveling in its elliptical orbit around the Sun,
The speed of Halley's Comet, while traveling in its elliptical orbit around the Sun,
Answer: increases as it nears the Sun
The gravitational attractive force between two masses is F. If the masses are moved to half of their initial distance, what is the gravitational attractive force?
The gravitational attractive force between two masses is F. If the masses are moved to half of their initial distance, what is the gravitational attractive force?
Answer: 4F
Two objects, with masses m1 and m2, are originally a distance r apart. The gravitational force between them has magnitude F. The second object has its mass changed to 2m2, and the distance is changed to r/4. What is the magnitude of the new gravitational force?
Two objects, with masses m1 and m2, are originally a distance r apart. The gravitational force between them has magnitude F. The second object has its mass changed to 2m2, and the distance is changed to r/4. What is the magnitude of the new gravitational force?
Answer: 32F
In the figure above, according to Kepler's laws of planetary motion,
In the figure above, according to Kepler's laws of planetary motion,
Answer: if Δt1=Δt2, then A1=A2
Suppose a satellite were orbiting the Earth just above the surface. What is its centripetal acceleration?
Suppose a satellite were orbiting the Earth just above the surface. What is its centripetal acceleration?
Answer: equal to g
The acceleration of gravity on the Moon is one-sixth what it is on Earth. An object of mass 72 kg is taken to the Moon. What is its mass there?
The acceleration of gravity on the Moon is one-sixth what it is on Earth. An object of mass 72 kg is taken to the Moon. What is its mass there?
Answer: 72 kg
Two objects attract each other gravitationally. If the distance between their centers is cut in half, the gravitational force
Two objects attract each other gravitationally. If the distance between their centers is cut in half, the gravitational force
Answer: quadruples
Two objects, with masses m1 and m2, are originally a distance r apart. The magnitude of the gravitational force between them is F. The masses are changed to 2m1 and 2m2, and the distance is changed to 4r. What is the magnitude of the new gravitational force?
Two objects, with masses m1 and m2, are originally a distance r apart. The magnitude of the gravitational force between them is F. The masses are changed to 2m1 and 2m2, and the distance is changed to 4r. What is the magnitude of the new gravitational force?
Answer: F/4
As a rock sinks deeper and deeper into water of constant density, what happens to the buoyant force on it?
As a rock sinks deeper and deeper into water of constant density, what happens to the buoyant force on it?
Answer: It remains constant
When atmospheric pressure changes, what happens to the absolute pressure at the bottom of a pool?
When atmospheric pressure changes, what happens to the absolute pressure at the bottom of a pool?
Answer: It increases by the same amount
A flask of water rests on a scale. If you dip your finger into the water, without touching the flask, the reading on the scale will
A flask of water rests on a scale. If you dip your finger into the water, without touching the flask, the reading on the scale will
Answer: increase
A boat loaded with rocks is floating in a swimming pool. If the rocks are thrown into the pool, the water level in the pool, after the rocks have settled to the bottom,
A boat loaded with rocks is floating in a swimming pool. If the rocks are thrown into the pool, the water level in the pool, after the rocks have settled to the bottom,
Answer: falls
When you hold your hand palm-up, the atmosphere exerts a force of about 800 N on the palm of your hand. Comparing this force with
When you hold your hand palm-up, the atmosphere exerts a force of about 800 N on the palm of your hand. Comparing this force with
Answer: They are all equal
What is the difference between the pressures inside and outside a tire called?
What is the difference between the pressures inside and outside a tire called?
Answer: gauge pressure
The hydraulic lift is an application of
The hydraulic lift is an application of
Answer: Pascal's principle
Consider three drinking glasses. All three have the same area base, and all three are filled to the same depth with water. Glass A is cylindrical. Glass B is wider at the top than at the bottom, and so holds more water than A. Glass C is narrower at the top than at the bottom, and so holds less water than A. Which glass has the greatest liquid pressure at the bottom?
Consider three drinking glasses. All three have the same area base, and all three are filled to the same depth with water. Glass A is cylindrical. Glass B is wider at the top than at the bottom, and so holds more water than A. Glass C is narrower at the top than at the bottom, and so holds less water than A. Which glass has the greatest liquid pressure at the bottom?
Answer: All three have equal pressure
A piece of iron rests on top of a piece of wood floating in a bathtub. If the iron is removed from the wood, what happens to the water level in the tub?
A piece of iron rests on top of a piece of wood floating in a bathtub. If the iron is removed from the wood, what happens to the water level in the tub?
Answer: It goes down
A 10-kg piece of aluminum sits at the bottom of a lake, right next to a 10-kg piece of lead. Which has the greater buoyant force on it?
A 10-kg piece of aluminum sits at the bottom of a lake, right next to a 10-kg piece of lead. Which has the greater buoyant force on it?
Answer: the aluminum
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