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      "question": "If a star that is 20 light-years from Earth explodes, gravitational waves from the explosion would reach Earth in",
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      "question": "When a model car speeds up to three times its original speed, its kinetic energy is",
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      "question": "The surface of Planet Earth loses energy to outer space due mostly to",
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      "question": "A principal source of the Earth’s internal energy is",
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      "question": "A diffraction grating relies on light",
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      "question": "A satellite in Earth orbit is above Earth’s",
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      "question": "According to Coulomb, a pair of charged particles placed twice as close to each other experience a force",
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      "question": "The factors, both of which will increase the magnetic field strength of an electromagnet, are",
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      "question": "The team that wins in a tug-of-war is the team that",
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      "question": "When white light passes through a prism, the light that bends more than green is",
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      "question": "The crystals that make up minerals are composed of",
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      "question": "Two vectors, one 3 N and the other 4 N, can have a resultant of",
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      "question": "Radioactivity has been around on Earth since the",
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      "question": "When the shadow of the Moon falls on Earth, we have a",
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      "question": "In both fission and fusion, energy is released while mass",
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      "question": "When relatively slow-moving molecules condense from the air, the temperature of the remaining air tends to",
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      "question": "The blueness of the daytime sky is due mostly to light",
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      "question": "A galvanometer can be calibrated to read electric",
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      "question": "Which of these temperatures is likely when a container of water at 20°C is mixed with water at 28°C?",
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      "question": "To view your full-face image in a steamy mirror compared with the height of your face the minimum height of the patch to wipe away is",
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      "question": "The vibrations in a transverse wave move in a direction",
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      "question": "A 1134-Hz tuning fork is sounded at the same time a piano note is struck. You hear three beats per second. The frequency of the piano string is",
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      "question": "Huygens’ principle for light is primarily described by",
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      "question": "When the temperature of a strip of iron is increased, the length of the strip",
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      "question": "When light undergoes interference, it can sometimes",
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      "question": "Which of these does NOT belong in the family of electromagnetic waves?",
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      "question": "A math book and a physics book sitting on a table are tied together with a length of string. With the string taut one book is pushed off the edge of the table. As it falls the other book is dragged horizontally across the table surface. With no friction acceleration of the books is",
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      "question": "As more lamps are connected in parallel in a circuit the current in the power source",
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      "question": "Newton’s law of cooling applies to objects that",
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      "question": "The fact that the Moon always shows its same face to Earth is evidence that the Moon rotates about its axis about once per",
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      "question": "Consider a ball rolling in a horizontal circular path on the inside surface of a cone. The normal force on the ball",
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      "question": "The compressions and rarefactions in sound normally travel",
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      "question": "The power required to raise a 100-kg crate a vertical distance of 2 m in a time of 4 s is",
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      "question": "In either a fission event or a fusion event, a quantity that remains unchanged is the",
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      "question": "If you were to travel at a speed close to the speed of light, you could notice that your own",
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      "question": "Sound travels in air by a series of",
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      "question": "To say that a rose petal is red is to say that it",
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      "question": "A rock suspended by a weighing scale weighs 5 N out of water and 3 N when submerged in water. What is the buoyant force on the rock?",
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      "question": "A capacitor loses half its remaining charge every second. If after five seconds its charge is q what was its initial charge?",
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      "question": "The pitch of a sound is mostly related to its",
      "model_answer": "B",
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    {
      "question": "As more lamps are connected to a series circuit, the current in the power source",
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      "question": "When an element ejects an alpha particle, the mass number of the resulting element",
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      "question": "An electron can be speeded up by",
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      "question": "A certain element emits 1 alpha particle, and its products then emit 2 beta particles in succession. The atomic number of the resulting element is changed by",
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      "question": "When an object is set vibrating by a wave that has a matching frequency, what occurs is",
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      "question": "The red glow in the neon tube of an advertising sign is a result of",
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      "question": "When you drop a ball from rest it accelerates downward at 9.8 m/s^2. If you instead throw it downward assuming no air resistance its acceleration immediately after leaving your hand is",
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      "question": "Carbon-14 is primarily produced by cosmic radiation in the",
      "model_answer": "A.",
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      "question": "Chain reactions in a fission reactor are caused by",
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      "question": "Satellites in circular Earth orbit maintain a constant speed because gravitational force on them is",
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      "question": "The complementary color of blue is",
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      "question": "The difference between dc and ac in electric circuits is that in dc, charges flow",
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    {
      "question": "To receive an electric shock there must be a",
      "model_answer": "D",
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      "question": "A karate chop delivers a force of 3000 N to a board that breaks. The force that the board exerts on the hand during this event is",
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    {
      "question": "Find the speed of a wave by multiplying its frequency by its",
      "model_answer": "B.",
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    {
      "question": "The magnitude of the gravitational force on a satellite is constant if the orbit is",
      "model_answer": "B.",
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    {
      "question": "The impulse–momentum relationship is a direct result of Newton’s",
      "model_answer": "B.",
      "correct_answer": 1,
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      "question": "A common nuclear fission reactor",
      "model_answer": "A.",
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    {
      "question": "The process of boiling water tends to",
      "model_answer": "B",
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    {
      "question": "When you scale up an object to 3 times its linear size, the surface area increases by",
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