Answer:
1454.54 kJ/h or 0.404 kW
Explanation:
Provided:
The heat being removed by the refrigerator is 800 kJ/h.
The refrigerator's coefficient of performance (COP) is 2.2.
Since the refrigerator operates for one-fourth of the time,
it effectively removes heat, Q = 
= 3200 kJ/h.
Next, the power consumed by the refrigerator during its operation is calculated as:
= 
.
= 1454.54 kJ/h
Thus, the fridge uses 1454.54 kJ/h
or 0.404 kW (given 1 kW = 3600 kJ/h).
Answer: since resistance is influenced by length, the resistance will be equally distributed as the wire is cut into two equal parts, resulting in
4.5 * 10^-3 ohm.
Explanation:
In the first case, once equilibrium is established,
mg = kx
135 = k(0.21) [Converted to SI units]
k = 135/(0.21)
In the second case, similarly when reaching equilibrium,
mg = kx
mg = [(135)(.449)]/(0.21)
mg = weight of the electronic equipment = approximately 289 N.
Answer:
Explanation:
Strain is defined as the ratio of an object's dimensional change when subjected to a force:
where
indicates the alteration in length of the object
signifies the object's initial length
In this case, we have 
and 
, hence the strain is
Answer:
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Explanation:
