Average velocity =
(distance between start-point and end-point) / (time from start to end)
in the direction of
(direction from the start-point to the end-point) .
a). The average velocity for the first half is
(50m)/(20sec) = 2.5 m/s south.
b). The average velocity for the second half is
(50m)/(22sec) = 2.273 m/s north
c). Average velocity for the round trip is zero, because
the start-point and end-point are the same point.
However ...
Average SPEED = (total distance covered) / (time to cover the distance)
Average SPEED for the round trip is
(100 m) / (42 sec) = 2.381 m/s (rounded)
Answer:
a. 0.8 mW/m² b. 1.6 mW/m² c. 6.4 mW/m²
Explanation:
Intensity,I = P/A were P = power and A = area = 4πr² were r = distance from electric guitar = 5.0 m.
a. When P = 0.25 W, I = 0.25 W/4π5² = 0.25 W/100π = 0.00079 W/m² ≅ 0.0008 W/m² = 0.8 mW/m²
b. When P = 0.50 W, I = 0.50 W/4π5² = 0.50 W/100π = 0.00156 W/m² ≅ 0.0016 W/m² = 1.6 mW/m²
c. When P = 2.0 W, I = 2.0 W/4π5² = 2.0 W/100π = 0.00636 W/m² ≅ 0.0064 W/m² = 6.4 mW/m²
Answer:
I = 5000 A
Explanation:
We will use Ampere's Law to calculate the current:
where,
B = Magnetic Field Strength = 0.1 mT = 1 x 10⁻⁴ T
μ = Permeability of Free Space = 4π x 10⁻⁷ N/A²
I = Current = ?
r = radius = 10 m
Therefore,
<u>I = 5000 A</u>
Answer:
<h2>
<em>True</em></h2>
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