Suppose you heat up an oven and boil a pot of water. Which of the following explains why you would be burned by sticking your hand briefly in the pot but not by sticking your hand briefly in the oven?
  • The water has a higher heat content than the oven because of density.
  • A car going around a circular track at a steady 100 miles per hour.
  • The total quantity of energy in the universe never changes.
  • decreases by a factor of 4(Gravity follows an inverse sqaure law with distance, so doubling the distance between them decreases the strength of the attraction by a factor of 22 = 4. )
A hot summer day might be 100.Ice cream is stored in freezers at 26.
  • FAHRENHEIT
  • increase
  • FALSE
  • False!
Considering Einstein's famous equation, E = mc2, which of the following statements is true?
  • The elevator is accelerating downwards.
  • gradually transforms into other forms of energy
  • its mass and the distance it falls, as well as the rate of gravitational acceleration.
  • A small amount of mass can be turned into a large amount of energy.
What is the acceleration of gravity of Earth?
  • It comes from the foods you eat.
  • hyperbolicparabolicelliptical
  • energy coming to your house from power companies
  • 9.8 m/s2 downward
As an interstellar gas cloud shrinks in size, its gravitational potential energy:
  • It would travel away from Earth into the solar system.
  • Fire an engine that shoots out gas to the right.
  • gradually transforms into other forms of energy
  • gravitational potential
potential energy
  • energy that is stored. Two examples of potential energy are breakfast cereal, which has chemical potential energy, and a heavy book on the top shelf at the library, which has gravitational potential energy.
  • energyradiationangular momentummomentum
  • the energy an object has due to its motion. Two examples are a car driving down the highway or the movements of the molecules of liquid in a cup of hot coffee.
  • Hot gas shoots out from the rocket and, by conservation of momentum, the shuttle moves in the opposite direction
All of the following are true. Which of the following gives evidence that Earth's orbit is not perfectly circular?
  • A rock starting from rest on a high cliff, then moving faster and faster as it falls
  • When hydrogen is fused into helium, whether in the Sun or in a nuclear bomb, the mass difference is turned into energy.
  • The car is making a gradual turn.
  • The Sun's angular size changes throughout the year.Earth's seasons are not of exactly equal length.
An apple contains BLANK energy that your body can convert into other forms energy.
  • while falling from a roof
  • gradually transforms into other forms of energy
  • Esupernova/ESun∼10^11
  • chemical potential
Consider the statement "There's no gravity in space." This statement is:
  • fasle
  • KELVIN
  • the same
  • FALSE
Where does the energy come from that your body uses to keep you alive?
  • What goes up must come down.
  • The car is making a gradual turn.
  • 10 light-years per 1 million years
  • It comes from the foods you eat.
Liquid water boils at 100.A typical room temperature is 24.Water freezes into ice at 0.
  • KELVIN
  • FALSE
  • False!
  • CELCIUS
Which of the following represents a change from potential energy to kinetic energy?
  • When hydrogen is fused into helium, whether in the Sun or in a nuclear bomb, the mass difference is turned into energy.
  • A rock starting from rest on a high cliff, then moving faster and faster as it falls
  • Earth year being a non-integer number of Earth days
  • The total quantity of energy in the universe never changes.
Momentum is defined as
  • Esupernova/ESun∼10^11
  • mass times velocity.
  • Eearthquake/Ebomb = 5
  • mass, velocity, and radius
The light from Polaris travels through space in the form of BLANK energy.
  • FAHRENHEIT
  • radiative
  • increase
  • kinetic
Newton's second law of motion tells us that the net force applied to an object equals its
  • Eearthquake/Ebomb = 5
  • mass-energy
  • mass times acceleration
  • What goes up must come down.
In the formula E = mc2, what does E represent?
  • mass energy of hydrogen fusing into helium.
  • the average kinetic energy of particles in a substance
  • the mass-energy, or potential energy stored in an object's mass
  • mass-energy
The ultimate source of energy that powers the Sun is
  • hyperbolicparabolicelliptical
  • mass energy of hydrogen fusing into helium.
  • mass, velocity, and radius
  • It comes from the foods you eat.
What would happen if the Space Shuttle were launched with a speed greater than Earth's escape velocity?
  • A rock starting from rest on a high cliff, then moving faster and faster as it falls
  • The total quantity of energy in the universe never changes.
  • gradually transforms into other forms of energy
  • It would travel away from Earth into the solar system.
Which object has the most kinetic energy?
  • hyperbolicparabolicelliptical
  • It comes from the foods you eat.
  • a 2-ton truck moving 90 km/hr
  • energy coming to your house from power companies
Compare the energy of a 1-megaton hydrogen bomb to the energy released by a major earthquake.
  • gravitational potential
  • Eearthquake/Ebomb = 5
  • What goes up must come down.
  • energy carried by light.
Compare the Sun's annual energy output to the energy released by a supernova.
  • mass would be the same but your weight would be different.
  • Esupernova/ESun∼10^11
  • 10 light-years per 1 million years
  • chemical potential
Which of the following are allowed orbital paths under gravity?
  • a 2-ton truck moving 90 km/hr
  • It comes from the foods you eat.
  • hyperbolicparabolicelliptical
  • Esupernova/ESun∼10^11
What quantities does angular momentum depend upon?
  • mass would be the same but your weight would be different.
  • a 2-ton truck moving 90 km/hr
  • hyperbolicparabolicelliptical
  • mass, velocity, and radius
Choose the correct description of an object that is accelerating?
  • Earth year being a non-integer number of Earth days
  • hyperbolicparabolicelliptical
  • A car going around a circular track at a steady 100 miles per hour.
  • energy coming to your house from power companies
kinetic energy
  • energy carried by light.
  • The energy goes to producing sound and to heating the ground, rock, and surrounding air.
  • the energy an object has due to its motion. Two examples are a car driving down the highway or the movements of the molecules of liquid in a cup of hot coffee.
  • energy that is stored. Two examples of potential energy are breakfast cereal, which has chemical potential energy, and a heavy book on the top shelf at the library, which has gravitational potential energy.
Water boils into gas phase at 373.15.The coldest possibletemperature is 0.
  • KELVIN
  • 0 Kelvin
  • fasle
  • radiative
If an object's velocity is doubled, its momentum is
  • True
  • doubled
  • CELCIUS
  • FAHRENHEIT
Compared to their values on Earth, on another planet your
  • mass energy of hydrogen fusing into helium.
  • It comes from the foods you eat.
  • mass would be the same but your weight would be different.
  • Earth year being a non-integer number of Earth days
When a rock is held above the ground, we say it has some potential energy. When we let it go, it falls and we say the potential energy is converted to kinetic energy. Finally, the rock hits the ground. What has happened to the energy?
  • mass energy of hydrogen fusing into helium.
  • The energy goes to producing sound and to heating the ground, rock, and surrounding air.
  • The Sun's angular size changes throughout the year.Earth's seasons are not of exactly equal length.
  • The total quantity of energy in the universe never changes.
Which of the following is an example in which you are traveling at constant speed but not at constant velocity?
  • energy coming to your house from power companies
  • What goes up must come down.
  • driving around in a circle at exactly 100 km/hr
  • The total quantity of energy in the universe never changes.
A skater can spin faster by pulling her arms closer to her body or spin slower by spreading her arms out from her body. This is due to
  • The elevator is accelerating downwards.
  • the total temperature of the objects
  • conservation of angular momentum
  • chemical potential
Radiative energy is
  • energy carried by light.
  • energy in light. Sunlight carries this form of energy, as do other forms of light including X-rays and radio waves
  • mass times velocity.
  • energy that is stored. Two examples of potential energy are breakfast cereal, which has chemical potential energy, and a heavy book on the top shelf at the library, which has gravitational potential energy.
units of energy
  • energy carried by light.
  • newton meterjouleBritish thermal unitcalorie
  • energy in light. Sunlight carries this form of energy, as do other forms of light including X-rays and radio waves
  • Earth year being a non-integer number of Earth days
Suppose two objects are attracting each other gravitationally. If you double the distance between them, the strength of their gravitational attraction __________.
  • The Sun's angular size changes throughout the year.Earth's seasons are not of exactly equal length.
  • When hydrogen is fused into helium, whether in the Sun or in a nuclear bomb, the mass difference is turned into energy.
  • decreases by a factor of 4(Gravity follows an inverse sqaure law with distance, so doubling the distance between them decreases the strength of the attraction by a factor of 22 = 4. )
  • the energy an object has due to its motion. Two examples are a car driving down the highway or the movements of the molecules of liquid in a cup of hot coffee.
Rapidly moving comets have more BLANK energy than slowly moving ones
  • increase
  • KELVIN
  • kinetic
  • mass-energy
The amount of gravitational potential energy released as an object falls depends on
  • The total quantity of energy in the universe never changes.
  • its mass and the distance it falls, as well as the rate of gravitational acceleration.
  • A rock starting from rest on a high cliff, then moving faster and faster as it falls
  • The Sun's angular size changes throughout the year.Earth's seasons are not of exactly equal length.
a conserved quantity?
  • energy coming to your house from power companies
  • energy in light. Sunlight carries this form of energy, as do other forms of light including X-rays and radio waves
  • energyradiationangular momentummomentum
  • conservation of angular momentum
If you are driving at 30 miles per hour and increase your speed to 60 miles per hour, you quadruple your kinetic energy.
  • False!
  • True
  • the same
  • 60kg
radiative energy
  • energy in light. Sunlight carries this form of energy, as do other forms of light including X-rays and radio waves
  • When hydrogen is fused into helium, whether in the Sun or in a nuclear bomb, the mass difference is turned into energy.
  • 0 Kelvin
  • Hot gas shoots out from the rocket and, by conservation of momentum, the shuttle moves in the opposite direction
The fact that the Voyager spacecraft continues to travel out of the solar system, even though its rockets have no fuel, is an example of
  • What goes up must come down.
  • the total temperature of the objects
  • Newton's first law of motion.
  • The elevator is accelerating downwards.
The escape velocity from Earth is greater for larger rockets than for small ones
  • FALSE
  • 60kg
  • mass-energy
  • fasle
Compared to its angular momentum when it is farthest from the Sun, Earth's angular momentum when it is nearest to the Sun is:
  • the total temperature of the objects
  • thermal
  • the same
  • FALSE
If you want to make a rocket turn left, you need to:
  • driving around in a circle at exactly 100 km/hr
  • Fire an engine that shoots out gas to the right.
  • while falling from a roof
  • mass energy of hydrogen fusing into helium.
Which of the following is a form of electrical potential energy?
  • Earth year being a non-integer number of Earth days
  • energy coming to your house from power companies
  • The total quantity of energy in the universe never changes.
  • 10 light-years per 1 million years
Suppose that two objects collide. Which of the following things is NOT the same both before and after the collision?
  • continue to move in the same way until it is acted upon by a force
  • the total temperature of the objects
  • the same
  • The total quantity of energy in the universe never changes.
When a spinning ice skater pulls in his arms, he spins faster because _________.
  • his angular momentum must be conserved, so reducing his radius must increase his speed of rotation
  • A rock starting from rest on a high cliff, then moving faster and faster as it falls
  • A small amount of mass can be turned into a large amount of energy.
  • The energy goes to producing sound and to heating the ground, rock, and surrounding air.
Which of the following statements correctly describes the law of conservation of energy?
  • The total quantity of energy in the universe never changes.
  • Earth year being a non-integer number of Earth days
  • A rock starting from rest on a high cliff, then moving faster and faster as it falls
  • The car is making a gradual turn.
You are standing on a scale in an elevator. Suddenly you notice your weight decreases. What do you conclude?
  • A small amount of mass can be turned into a large amount of energy.
  • The total quantity of energy in the universe never changes.
  • The elevator is accelerating downwards.
  • driving around in a circle at exactly 100 km/hr
Which person is weightless?
  • Newton's first law of motion.
  • driving around in a circle at exactly 100 km/hr
  • A child in the air as she plays on a trampoline.
  • mass times acceleration
T/F When energy is converted from one form to another, a tiny amount is inevitably lost
  • 50-100° Fahrenheit
  • false
  • radiative
  • False!
If the United States obtained all its energy from oil, how much oil would be needed each year?
  • 1×10^13 liters
  • 50-100° Fahrenheit
  • mass-energy
  • false
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