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fomenos
2 years ago
15

Marcus was asked to find out what affects the strength of electromagnets. He was given a simple electromagnet made from a coil o

f wire and a power supply.
What variables could Marcus investigate?
Mathematics
1 answer:
Alja [10]2 years ago
5 0

Answer:

bncjk make sure bgfdf hi olb f see him be see vg hhzch

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Answer right you get brainiest also 20 points just number 1 and 2
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3 years ago
Write an equation in point-slope form of the line that passes through the given point and has the given slope. (12, 5); m = -3
givi [52]

Answer:

y - 5 = -3(x - 12)

Step-by-step explanation:

Point slope form is: y - y1 = m(x - x1), where (x1, y1) is a point on the line, and m is the slope of the line.

Plug in the point and the slope:

y - y1 = m(x - x1)

y - 5 = -3(x - 12)

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3 years ago
After each charging, a battery is able to hold only 97% of the charge from the previous charging. The battery was used for 18 ho
Cerrena [4.2K]

Answer:

The total nuber of hours that the battery can be used over its lifetime is 600.

Step-by-step explanation:

We use an infinite geometric series to solve this question.

The sum of all values of an infinite geometric series is given by the following equation:

S = \frac{a_{1}}{1 - r}

In which a_{1} is the first term and r is the common ratio.

After each charging, a battery is able to hold only 97% of the charge from the previous charging.

This means that r = 0.97

The battery was used for 18 hours on its first charge before it had to be recharged.

This means that a_{1} = 18

What is the total number of hours the battery can be used over its lifetime?

S = \frac{18}{1 - 0.97} = 600

The total nuber of hours that the battery can be used over its lifetime is 600.

7 0
3 years ago
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