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Andrei [34K]
3 years ago
8

Explain the purpose of oxidation numbers?

Physics
1 answer:
morpeh [17]3 years ago
5 0
It’s important to know if an atom loses or gains electrons when combining with other atoms to form compounds
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A generator makes 3.45 kilojoules (kJ) of energy during each minute of
erastovalidia [21]
The total energy produced by the generator is 3.45 kJ. Of this energy, 2.23 kJ are lost because friction and electrical resistance, so this amount of energy is converted into thermal energy. This means that the rest of the energy is available as electric energy, and it is equal to:
E=3.45 kJ-2.23 kJ=1.22 kJ
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4 years ago
6th grade science please help !​
Len [333]

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3 years ago
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Which of the following best describes magnetic fields? Question 4 options: Magnetic fields must have only positive charges. Magn
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<span> Magnetic fields have north and south magnetic poles.</span>
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4 years ago
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The concentration of an isotope is 1/500 of its initial value after one day. What is the rate of decay?
mel-nik [20]
The exponential growth/decay formula is given by A = Pe^(rt), where A is the final amount, P is the initial amount, r is the rate of growth/decay and t is time. 

We are given A = (1/500)P and t=1, so substituting:
(1/500)P = Pe^(r*1)
Cancelling out P on both sides:
1/500 = e^r
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8 0
3 years ago
Which measurement can be made using a micrometer screw gauge?
insens350 [35]

Answer:

C. The diameter of a wire

Explanation:

A micrometer screw gauge is a device used for the measurement of small dimensions which may not be measured accurately by the use of a vernier caliper, e.g diameter of a thin wire. it has a high degree of accuracy.

From the given option in the question, the measurement that can be made using a micrometer screw gauge is the diameter of a wire

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