Describe the following physical occurrences as events, that is, in the form ( x , y , z , t ): (a) A postman rings a doorbell of a house precisely at noon. (b) At the same lime as the doorbell is lung, a slice of bread pops out of a toaster that is located 10 1T1 from the door in the east direction from the door. (c) Tell seconds later, an airplane arrives at the airport, which is 10 km from the door in the east direction and 2 km to the south.
Describe the following physical occurrences as events, that is, in the form ( x , y , z , t ): (a) A postman rings a doorbell of a house precisely at noon. (b) At the same lime as the doorbell is lung, a slice of bread pops out of a toaster that is located 10 1T1 from the door in the east direction from the door. (c) Tell seconds later, an airplane arrives at the airport, which is 10 km from the door in the east direction and 2 km to the south.
Describe the following physical occurrences as events, that is, in the form (x, y, z, t): (a) A postman rings a doorbell of a house precisely at noon. (b) At the same lime as the doorbell is lung, a slice of bread pops out of a toaster that is located 10 1T1 from the door in the east direction from the door. (c) Tell seconds later, an airplane arrives at the airport, which is 10 km from the door in the east direction and 2 km to the south.
The Voyager 1 spacecraft has traveled farther than any other man-made object, and inAugust 2012 it entered into interstellar space when it was a distanceof 1.8 * 1013 m from Earth. How many hours elapsed between thetime a command was sent from Earth and the time the commandwas received by Voyager when it entered interstellar space?
The Lockheed SR-71 Blackbird may be the fastest nonresearch airplane ever built; it traveled at 2200 miles/ hour (983 m/s) and was in operation from 1966 to 1990. Its length is 32.74 m. (a) By what percentage would it appear to be length contracted while in fl ight? (b) How much time difference would occur on an atomic clock in the plane compared to a similar clock on Earth during a fl ight of the Blackbird over its range of 3200 km?
Five clocks are being tested in a laboratory. Exactly at noon, as determined by the WWV time signal, on successive days of a week the
clocks read as in the following table. Rank the five clocks according to their relative value as good timekeepers, best to worst. Give the
number of the correct clock in each case. Which clock is (a) the best timekeeper? (b) the second-best timekeeper? (c) the third-best
timekeeper? (d) the fourth-best timekeeper? (e) the worst timekeeper?
Clock Sun.
Mon.
Tues
Wed.
Thurs.
Fi.
Sat.
A.
12:36:40 12:36:56 12:37:12
12:37:27
12:37:44 1237-59 12:38:14
11:59:59 12:00:02 11:59-57 12:00:07 12:00:02 11:59:56 12:00:03
B
15:50:45 15:51:43 15:52-41 15:5339 15:54:37 15:5535 155633
D
12:03:59 12:0252 1201:45 12:00:38 11:59:31 11:58:24 11:57:17
E
12:03:59 12:02:49 12:0154 12:01:52 1201:32 1201:22 1201:12
(a)
(b)
(c)
(d)
(e)
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