A student is using a frequency generator set to 440 Hz. Another student has an identical generator playing an unknown frequency.
1 answer:
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Answer:
Photons strike the CD
Explanation:
First of all, it is necessary to calculate the energy produced by a semiconductor laser for 69 minutes:
Next, it is possible to calculate the number of photons striking the CD surface during this time:
long in CD
light velocity
Solve to n'
Answer:
<em>The tourist's average speed was 80 mph</em>
Explanation:
<u>Average Speed </u>
If an object travels a distance d in a time t regardless of the direction, the average speed is the quotient of the distance over the time:
The tourist leaves Pittsburgh and travels 60 miles South in 45 minutes. Then he heads West and travels 100 miles in 1 hour and 15 minutes.
The total distance traveled is:
d = 60 miles + 100 miles = 160 miles
The total time is:
t = 45 minutes + 1 hour + 15 minutes = 2 hours
The average speed is:
v = 80 mph
The tourist's average speed was 80 mph