Term
| According to the book, a wave could be best described as... |
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Definition
| a transfer of a disturbance from one point to another without any corresponding transfer of matter |
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Term
| Are small ripples sent out across the surface of a lake truly waves, as defined by your book? |
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Definition
| Yes, because the water itself doesnt go anyplace but simply oscillates up and down |
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Term
| A long-wavelength and a short-wavelength wave both move along the same rope. Which wave has the higher frequency, and which wave carries more energy, assuming their amplitudes are the same? |
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Definition
| The short-wavelength wave has the higher frequency and carries more energy. |
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Term
| Two continuous waves having the same wavelength and amplitude pass through the same medium. They are aligned peak to peak and trough to trough so that they interfere. The resulting wave has... |
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Definition
| The same wavelength and twice the amplitude |
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Term
| Which of the following is transported by all traveling waves? |
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Term
| Two different wavetrains on the surface of a pond would be expected to have roughly the same... |
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Definition
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Term
| In case of light waves, the thing that does the waving is... |
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Term
| For a given medium, what determines the color of visible light? |
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Term
| Which of the following waves has the highest frequency? |
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Term
| Note that speeds in this problem are slow, compared to the speed of light. I will not always warn you about that. Pam in in a train, headed north, at 30 m/s, past Jim. Pam uses a slingshot to fire a pebble. It travels at 40 m/s towards the rear of the train. Jim observes the pebble's velocity to be.... |
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Definition
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| Pam is in a train, headed north, at 30 m/s, past Jim. Pam uses a slingshot to fire a pebble. It travels at 40 m/s, towards the rear of the train. Pam observes the pebble's velocity to be... |
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Definition
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Term
| Pam is in train moving at 20 m/s, eastward, relative to Jim. She throws a ball. It has a speed of 20 m/s toward the rear of the train. What is Jim's observation, regarding the ball? |
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Definition
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Term
| Jim travels by car at 30 m/s, eastward. Pam, moving eastward in a train at 70 m/s, passes him. Jim's velocity relative to Pam is... |
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Term
| When a stationary observer drops a coin, that observer sees the coin fall straight down. Suppose that you are inside a jet plane that flies smoothly as it gains speed along a straight line. Can you detect this acceleration without looking out a window or otherwise receiving information from outside the plane? |
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Definition
| Yes. For example, if you dropped a coin you would find that it lands to the rear of the drop point. |
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Term
| When a stationary observer drops a coin, that observer sees the coin fall straight down. You are a passenger in moving car, and you drop a coin from your right hand, holding your left hand directly below the point of release. If the car is moving at unchanging velocity, the coin will come down.... |
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Definition
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Term
| Suppose you are inside a jet plane moving at constant speed in a straight line across the Atlantic ocean. Can you tell that you are moving without receiving information from the outside the plane? If so, how could you detect this, and if not, why not? |
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Definition
| No because the principle of relativity |
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Term
| "Unless you look outside, you cannot tell how fast you are going." This is one way of stating... |
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Definition
| Gailileo's theory of relativity |
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Term
| Jim stands on Earth, Pam moves away from him in a rocket, at 299,000 km/s (1000 km/s slower than the speed of light). Jim sends a laser beam toward Pam. As the tip of the beam passes her rocket, Jim observes.... |
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Definition
| The beam moving away at 300,000 km/s and the beam moving just 1000 km/s faster than Pam. |
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Term
| Jim stands on Earth, Pam moves away from him in a rocket, at 299,000 km/s (1000 km/s than the speed of light). Jim sends a laser beam toward Pam. As the tip of the beam passes her rocket, Pam observes.... |
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Definition
| the laser beam moves past her at 300,000 km/s |
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Term
| Pam and Jim pass each other, in rocket ships, at a relative velocity equal to half the speed of light. Pam has an ice cream cone that will melt in 5 minutes if not refrigerated, She removes her cone from the refrigerator, and allows it to melt. According to Jim, how long does it take for Pam's cone to melt? |
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Definition
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| Pam and Jim pass each other, in rocket ships, at a relative velocity equal to half the speed of light. Pam has an ice cream cone that will melt in 5 minutes if not refrigerated, She removes her cone from the refrigerator, and allows it to melt. According to Pam, how long does it take for Pam's cone to melt? |
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Definition
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Term
| Pam passes Jim at a high speed. Each holds a meter stick (ruler) oriented parallel to the direction of relative motion. Jim observes that.... |
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Definition
| his meter stick is 1 m long, and Pam's meter stick is less than 1 m long |
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Term
| Pam passes Jim at a high speed. Each holds a meter stick (ruler) oriented perpendicular to the direction of relative motion. Jim observes that.... |
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Definition
| his meter stick and Pam's meter stick are both 1 m long |
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Term
| You are in a spaceship moving past Earth at nearly half the speed of light and you observe Jim, who is on Earth. You measure his mass, pulse rate, and size. How are they different from the values measured by Jim himself? |
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Definition
| Mass has increased, pulse rate has slowed down, and size is reduced along the direction of motion. |
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Term
| You lift a .9 kg object, with a weight of 9 N, on Earth, by 1 meter. How much does the object's energy increase? |
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Definition
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Term
| For this problem, use 3 x 109 m/s as the speed of light. You lift a 0.9 kg object, with a weight of 9 N, on Earth, by 1 meter. By about how much does the objects mass increase? |
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Definition
| 10-16 kg (to be clear, -16 is the power) |
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