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kenny6666 [7]
3 years ago
5

A gas hot water heater is 65% efficient. The energy output to heat the water is 2.3 kWh.

Physics
1 answer:
Art [367]3 years ago
7 0

Answer:

3.5 kWh

1.2 kWh are lost

Explanation:

65=2.3/Ein*100

0.65=2.3/Ein

Ein=2.3/.65

Ein=3.5

3.5-2.3=1.2 kWh

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In an effort to decrease the mAs of an exposure, the 15% rule of kVp change may be considered. Changing the original kVp of 84 u
Roman55 [17]

Answer:

Will result in :Greater Compton scatter interaction

Explanation

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3 years ago
What is the velocity of a 50kg skater if her momentum is 225kg. m/s?
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|Momentum| = (mass) x (speed)

225 kg-m/s =(50kg) x (speed)

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3 years ago
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3 years ago
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Scientific evidence documents the pattern of evolution. The evidence exists in a variety of categories. What are these categorie
Sauron [17]

Answer:

Explanation:

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3 0
3 years ago
You know your mass is 62 kg but when you stand on a bathroom scale in an elevator it says your mass is 77 kg what is the acceler
lbvjy [14]
In a stationary situation, the weight of person is
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This is the weight "felt" by the scale, which is basically the normal reaction applied by the scale on the person, and which uses the value of g (9.81) as reference to convert the weight (602.8 N) into a mass (62 kg).

When the person is in the elevator, the scale says 77 kg. The scale is still using the same value of conversion (9.81), so the apparent weight "felt" by the scale is
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This is the normal reaction applied by the scale on the person, and which is directed upward. Besides this force, there is still the weight W of the person, acting downward. So, if we use Newton's second law:
\sum F = ma
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The negative sign means the acceleration is in the opposite direction of g (which we take positive), so it means the elevator is going upward.
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3 years ago
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