Answer;
= 0.018 mm
Explanation;
Mass = 12 ounces
1 ounce = 28.4 g
thus mass in g = 12 × 28.4 = 340.8 g
Volume = mass/density
= 340.8 g /2.70 g/cm³
= 126 cm³
The thickness from volume and area;
thickness = volume/ area
Area = 75 square ft
1 Square ft = 929.03 square centimeter
Thickness = 126 cm³/ (75 × 929.03)
= 0.001808 cm
but, 1 cm = 10 mm
Therefore; 0.001808 ×10 = 0.01808 mm
= 0.018 mm ( 3 decimal places)
the answer is correct why.
EXPLANATION:
First copy the 15 and u will × now in the no. of (9.8 ×1.5) the equal is 15 m/s -14.7m/s so we - the now the 15-14.7 and the ANSWER IS 0.3m/s.
Explanation:
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1 pound ≈ 0.4536 kg
170 pounds ≈ 170 * 0.4536 kg
≈ 77.112 kg
Force, it is force because to be able to move anything you must use force.
Answer:
N= 3
Explanation:
For this exercise we must use Faraday's law
E = - dФ / dt
Ф = B . A = B Acos θ
tje bold indicate vectors. As it indicates that the variation of the field is linear, we can approximate the derivatives
E = - A cos θ (B - B₀) / t
The angle enters the magnetic field and the normal to the area is zero
cos 0 = 1
A = π r²
In the length of the wire there are N turns each with a length L₀ = 2π r
L = N (2π r)
r = L / 2π N
we substitute
A = L² / (4π N²)
The magnetic field produced by a solenoid is
B = μ₀ N/L I
for which
B₀ = μ₀ N/L I
The final field is zero, because the current is zero
B = 0
We substitute
E = - (L² / 4π N²) (0 - μ₀ N/L I) / t
E = μ₀ L I / (4π N t)
N = μ₀ L I / (4π t E)
The electromotive force is E = 0.80 mV = 0.8 10⁻³ V
let's calculate
N = 4π 10⁻⁷ 200 1.60 / (4π 0.120 0.8 10⁻³)]
N = 320 10⁻⁷ / 9.6 10⁻⁶
N = 33.3 10⁻¹
N= 3