Answer:
a)
b)
Explanation:
Given:
- initial rotational speed of phonograph,
- final rotational speed of phonograph,
- time taken for the acceleration,
a)
Now angular acceleration:
b)
Using eq. of motion:
Explain why liquid particles at a high pressure would need more energy to change to a gas than liquid particles at a low pressur
1 answer:
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Answer:
6.82%
Explanation:
If 44 ±3 beats are counted in 30 seconds, twice the number of beats will be counted in 1 minute or 60 seconds, i.e. 88 beats per minute. The absolute uncertainty in 1 minute will also be twice the uncertainty in 30 seconds, so 88 ±6 beats per minute.
The percentage uncertainty can be found by below:
The percentage uncertainty can also be found for the 30 second interval
While the absolute uncertainty varies depending on the time interval, the percentage uncertainty remains the same: 6.82%