Explain why elements with a completely full outer shell of electrons do not usually bond with other elements to form compounds.
1 answer:
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Answer:
L = 169.5 m
Explanation:
Using Ohm's Law:
V = IR
where,
V = Voltage = 1.5 V
I = Current = 10 mA = 0.01 A
R = Resistance = ?
Therefore,
1.5 V = (0.01 A)R
R = 150 Ω
But the resistance of a wire is given by the following formula:
where,
ρ = resistivity = 1 x 10⁻⁶ Ω.m
L = length of wire = ?
A = cross-sectional area of wire = πr² = π(0.6 mm)² = π(0.6 x 10⁻³ m)²
A = 1.13 x 10⁻⁶ m²
Therefore,
<u>L = 169.5 m</u>
Answer:
The person can walk 0.0426 m to the right
Explanation:
Moment = Force * Perpendicular moment
The principle of moment states that the sum of clockwise moments should equal the sum of the anticlockwise moments
From the free body diagram attached to this solution. If the moment is taken about B
The length of the plank = 6.1 m
The weight of the plank will act at the middle i.e. 6.1/2 = 3.05 m
Sum of clockwise moments = Sum of anticlockwise moments
(127 * 1.5) + (127*2.5) = (127 * 3.05) + (846 * l)
190.5 + 317.5 = 387.35 + 846l
190.5 + 317.5 - 387.35 = 846l
120.65 = 846l
l = 120.65/846
l = 0.1426 m
Since the person is standing at the 0.1 m to the right of the support, that means he can only walk a distance of 0.1426 m - 0.1 m to the right
The distance the person can walk to the right = 0.0426 m to the right
