Chapter 1: Problem 62
A plane leaves the airport in Galisteo and flies 170 km at 68.0
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Key Concepts
These are the key concepts you need to understand to accurately answer the question.
Chapter 1: Problem 62
A plane leaves the airport in Galisteo and flies 170 km at 68.0
These are the key concepts you need to understand to accurately answer the question.
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Two ropes in a vertical plane exert equal-magnitude forces on a hanging weight
but pull with an angle of 72.0
The following conversions occur frequently in physics and are very useful. (a)
Use 1 mi = 5280 ft and 1 h = 3600 s to convert 60 mph to units of ft/s. (b)
The acceleration of a freely falling object is 32 ft/s
You decide to go to your favorite neighborhood restaurant. You leave your apartment, take the elevator 10 flights down (each flight is 3.0 m), and then walk 15 m south to the apartment exit. You then proceed 0.200 km east, turn north, and walk 0.100 km to the entrance of the restaurant. (a) Determine the displacement from your apartment to the restaurant. Use unit vector notation for your answer, clearly indicating your choice of coordinates. (b) How far did you travel along the path you took from your apartment to the restaurant, and what is the magnitude of the displacement you calculated in part (a)?
A maser is a laser-type device that produces electromagnetic waves with
frequencies in the microwave and radio-wave bands of the electromagnetic
spectrum. You can use the radio waves generated by a hydrogen maser as a
standard of frequency. The frequency of these waves is 1,420,405,751.786
hertz. (A hertz is another name for one cycle per second.) A clock controlled
by a hydrogen maser is off by only 1 s in 100,000 years. For the following
questions, use only three significant figures. (The large number of
significant figures given for the frequency simply illustrates the remarkable
accuracy to which it has been measured.) (a) What is the time for one cycle of
the radio wave? (b) How many cycles occur in 1 h? (c) How many cycles would
have occurred during the age of the earth, which is estimated to be 4.6
\(\times\) 10
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