The amount of heat needed to raise the temperature of a substance by
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is given by
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where
m is the mass of the substance
Cs is its specific heat capacity
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is the increase in temperature
For oxygen, the specific heat capacity is approximately

The variation of temperature for the sample in our problem is
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while the mass is m=150 g, so the amount of heat needed is
Answer:
(e) 98,1 KJ
Explanation:
The engine produces 19%; it means, it rejects 81% of energy. ⇒ 81/19=4.26 times.
The engine produces 23 kJ; it means it rejects 23 * 4.26 = 98.05263 kJ
<span>Each laid 250 bricks but while Jake was still working, Josh was lounging in the shade. Josh has more power but that power was only on for 3 hours out of 4.5. Obviously Josh could get more done is less time as long as he keeps working. Jake will get the hang of it soon.</span>
Answer: As with all metals, the alkali metals are malleable, ductile, and are good conductors of heat and electricity. The alkali metals are softer than most other metals.
Alkaline earth metals
The alkaline earth elements are metallic elements found in the second group of the periodic table
Explanation:
Answer:
Explanation:
You didn't last any of the variables. You have to list the variables to tell which are which.