- IF THE CHOICES ARE TRUE OR FALSE THEN U GO
- The answer is false a machine cannot be 100 percent efficient because the output of a machine is always less than input. (correct me if I’m wrong)
Suppose we observe a cepheid variable in a distant galaxy. The cepheid brightens and dims with a regular period of about 10 days
1 answer:
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Answer:
Explanation:
<u>Given:</u>
No. of times = 600 times
Time = 60 seconds
<u>Required:</u>
Frequency = f = ?
Time Period = T = ?
<u>Solution:</u>
<h2>Frequency = No. of Times / Time</h2>Frequency = 600 / 60
<u>Frequency = 10 Hz</u>
<h2>Time Period = 1 / Frequency</h2>Time Period = 1 / 10
<u>Time Period = 0.1 secs</u>