2 years ago

A toaster changes electrical energy to thermal energy. This is a/an

1 answer:

7 0

A because the toaster converts electrical energy into heat energy and, after the bread has been heated for sufficient time, toasts pop out, ready to be buttered. And converting means transforming.

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What is the change in internal energy of the system (∆U) in a process in which 10 kJ of heat energy is absorbed by the system an

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Answer:

Explanation:

According to first law of thermodynamics:

∆U= q + w

= 10kj+(-70kJ)

-60kJ

, w = + 70 kJ

(work done on the system is positive)

q = -10kJ ( heat is given out, so negative)

∆U = -10 + (+70) = +60 kJ

Thus, the internal energy of the system decreases by 60 kJ.

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3 years ago

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Type the correct answer in the box.use numerals instead of words. if necessary, use / for the fraction bar. δabc is a right tria

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From the diagram The value of cos C × sin A = $\frac{3}{4}$

<h3>Determine the numerical value of cos C × sin A</h3>

First step : determine the values of cos C and sin A

cos C = adjacent / hypotenuse

= a / b

= $\sqrt{3} / 2$

= √3/2

sin A = sin 60⁰

= √3/2

Therefore the numerical value of cos C * sin A = $\frac{3}{4}$

In conclusion From the diagram The value of cos C × sin A = $\frac{3}{4}$

Learn more about right angle : brainly.com/question/24323420

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