Answer:
Step down transformers are used in power adaptors and rectifiers to efficiently decrease the voltage. They are also used in electronic SMPS.
Explanation:
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Answer:
Accurate
Explanation:
Accuracy deals with the nearness of the measured values to the true value.
Precision is the ability to reproduce a certain result in a repeated fashion.
- From the given masses of the 5-lb bags, we see that the mean value of the measurement is 5.1-lb
- This value is very close to the original mass of the bag which is 5-lb bags.
- We can say the reading is accurate
The reading is not precise because, the same weight is not reproduced. Different values of weight was reported from each of the measurement process.
Answer:
400 J
Explanation:
The efficiency of a machine is defined as

where
is the work output
is the work input
For this machine, we know the following
is the work in input
is the efficiency
Solving for the work output, we find
