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Amiraneli [1.4K]
3 years ago
11

Which label identifies the statement: "Energy cannot be created or destroyed, but it can be converted or changed into different

forms. A. the law of energy transformation B. the law of conservation of matter C. the law of energy equilibrium D. the law of conservation of energy
Physics
1 answer:
podryga [215]3 years ago
7 0
D. The law of conservation of energy identifies the statement
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So that international people don't mistake units for others. ex 1 inch could be mistaken for 1 cm in non American countries
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A Nichrome (TM) wire has a resistance of 100.00 Ω at 11.5ºC. What is the resistance of at 10.0ºC ? The temperature coefficient o
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Answer:99.9 ohm

Explanation:

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4 years ago
A 120 V electric heater draws a current of 14.1 A. What is the resistance, in ohms?
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Answer:

8.5 ohms

Explanation:

from ohms law

V=IR

120=14.1R

divide both sides by 14.1

120/14.1=14.1R/14.1

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5 0
3 years ago
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What is the differences between up milling and down milling?
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In up milling the cutter rotates clockwise when cutting the workpiece from right to left. in down milling the cutter rotates clockwise when cutting the workpiece from left to right
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3 years ago
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Your friend comes across a good deal to purchase a gold ring. She asks you for advice and for you to test the ring. The ring has
Luden [163]

Answer:

She is not getting a good deal.

Explanation:

The equation that relates heat with mass, specific heat and temperature change of an object is Q=mc\Delta T.

Always convert temperature to Kelvin, although in our case it's not necessary because the \Delta T will be the same, and we will leave the mass in grams because we will be getting J/g^{\circ}C units for specific heat, which we can compare to the one given for gold.

We then calculate the specific heat of the object in question:

c=\frac{Q}{m\Delta T}=\frac{94.8J}{(4.54g)(47.5^{\circ}C-23^{\circ}C)}=0.8523 J/g^{\circ}C

Which shows it's not gold.

5 0
3 years ago
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