Answer:
Explanation:
(1) 1-methylbutane
(2) 1,1,3-trimethylhexane
(3) 5octyne
(4)2-ethyl-1-propanol
(5)2,2-dimethyl1-3-butanol
Answer:
A is its answer
Explanation:
Fan uses electrical energy and makes it to mechanical energy by rotating
Same is with the drill
Trampoline does not use electrical energy
Lamp uses electrical energy but it converts it into light energy and heat energy
So A is the answer
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Answer:
The percentage efficiency of the electrical element is approximately 82.186%
Explanation:
The given parameters are;
The thermal energy provided by the stove element,
= 3.34 × 10³ J
The amount thermal energy gained by the kettle,
= 5.95 × 10² J
The percentage efficiency of the electrical element in heating the kettle of water, η%, is given as follows;

Therefore, we get;

The percentage efficiency of the electrical element, η% ≈ 82.186%.
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