How many electrons make up a charge of 3.5kC?
2 answers:
Well now, I don't know !
Let's figure it out.
The charge on one electron is 1.60 x 10⁻¹⁹ Coulomb .
To get 3,500 Coulombs of charge, you'd need to
go around and collect
(3,500) / (1.60 x 10⁻¹⁹) electrons.
That's 2.19 x 10²² of the little fellas.
That's a big number. But what's REALLY amazing is the
mass and weight of that many electrons:
Mass: 1.989 x 10⁻⁵ gram
Weight: about 0.0000007 ounce !
That's not one electron. That's the whole <span>2.19 x 10²² uvvum
that it takes to hold 3,500 Coulombs of charge.</span>
21.8452851 * 10^21 e. Which is 21.845.285.100.000.000.000.000 electrons. A lot.
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The answer is A.) Gravity
Answer: Resistance =
, Current = 1.56 A, Voltage =4.99 V
The resistance,
where, 
is resistivity, A is the area and l is the length of the resistor.
It is given that:
Length, l=2 mm
Area, 
Hence, 
We know, Power, 
We know, Voltage, 
PE = mgh
Mass, m = 7kg, g ≈ 10 m/s², height = 2m
= 7*10*2
= 140 Joules.
Explanation:
equating the parameters into the formula, it's gonna be
= ½ × 60 × 20²
= ½ × 60 × 400
= ½ × 24000
K.E = 12000J
