# Shared Flashcard Set

## Details

Physics and Human Affairs Test #4
Final
26
Physics
Undergraduate 1
05/07/2014

## Cards Return to Set Details

Term
 According to the book, a wave could be best described as...
Definition
 a transfer of a disturbance from one point to another without any corresponding transfer of matter
Term
 Are small ripples sent out across the surface of a lake truly waves, as defined by your book?
Definition
 Yes, because the water itself doesnt go anyplace but simply oscillates up and down
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?
Definition
 The short-wavelength wave has the higher frequency and carries more energy.
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...
Definition
 The same wavelength and twice the amplitude
Term
 Which of the following is transported by all traveling waves?
Definition
 energy
Term
 Two different wavetrains on the surface of a pond would be expected to have roughly the same...
Definition
 wave speeds
Term
 In case of light waves, the thing that does the waving is...
Definition
 an electromagnetic field
Term
 For a given medium, what determines the color of visible light?
Definition
 frequency
Term
 Which of the following waves has the highest frequency?
Definition
 ultraviolet
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....
Definition
 10 m/s south
Term
 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...
Definition
 40 m/s south
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?
Definition
 it falls straight down
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...
Definition
 40 m/s westward
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?
Definition
 Yes. For example, if you dropped a coin you would find that it lands to the rear of the drop point.
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....
Definition
 in your left hand
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?
Definition
 No because the principle of relativity
Term
 "Unless you look outside, you cannot tell how fast you are going." This is one way of stating...
Definition
 Gailileo's theory of relativity
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....
Definition
 The beam moving away at 300,000 km/s and the beam moving just 1000 km/s faster than Pam.
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....
Definition
 the laser beam moves past her at 300,000 km/s
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?
Definition
 More than 5 minutes
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 Pam, how long does it take for Pam's cone to melt?
Definition
 5 minutes
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....
Definition
 his meter stick is 1 m long, and Pam's meter stick is less than 1 m long
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....
Definition
 his meter stick and Pam's meter stick are both 1 m long
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?
Definition
 Mass has increased, pulse rate has slowed down, and size is reduced along the direction of motion.
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?
Definition
 9 Joules
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?
Definition
 10-16 kg (to be clear, -16 is the power)
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