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lesya692 [45]
3 years ago
6

The starter motor of a car engine draws a current of 140A from the battery. The copper wire to the motor runs for 0.90s until th

e car engine starts. How much charge passes through the starter motor?
Physics
1 answer:
nasty-shy [4]3 years ago
8 0
"1 Ampere" (A) means "1 coulomb of charge per second"

140 A means 140 coulombs per second

(140 coulomb/sec) x (0.9 sec)  =  126 coulombs of charge.


Go a little farther:

Electrons are the things that move through wire carrying charge.

6.25 x 10¹⁸ electrons carry 1 coulomb of charge. 

126 coulombs = 787,500,000,000,000,000,000 electrons (rounded)
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Explanation:

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2 years ago
What is the quantity of motion ??
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3 years ago
To pull an old stump out of the ground, you and a friend tie two ropes to the stump. You pull on it with a force of 500 N to the
zhannawk [14.2K]

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C. less than 950 N.

Explanation:

Given that

Force in north direction F₁ = 500 N

Force in the northwest F₂ = 450 N

Lets take resultant force R

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The resultant force R

R=\sqrt{F_1^2+F_2^2+2F_1F_2cos\theta}

R=\sqrt{500^2+450^2+2\times 450\times 500\times cos\theta}

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C. less than 950 N

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8 0
3 years ago
Match the measurements to the correct number of significant figures.
Shalnov [3]
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1.  Count ALL nonzero numbers
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A - 5
B - 2
C - 3
D - 1
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8 0
2 years ago
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