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mart [117]
3 years ago
12

The flow of electrical current is possible because electrons are...

Physics
2 answers:
e-lub [12.9K]3 years ago
8 0

A.

because atoms are always looking for neutrality within their nucleus and within their outer field

Nikitich [7]3 years ago
7 0
The answer is the letter A.
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An athelete swims from northend to southend of a 50.0m pool in 20.0s and makes the return trip to the starting position in 22.0s
Sauron [17]

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)

4 0
3 years ago
Calculate the intensity of the sound waves from an electric guitar’s amplifier at a
Step2247 [10]

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

8 0
3 years ago
Your friend says that the heavyweight champion of the world cannot exert a force of N on a piece of tissue paper with his best p
worty [1.4K]

Answer:

You agree that it can't be done.

4 0
3 years ago
The magnetic field due to a utility wire is 0.10 mT when you are at a distance of 10 meters from it. What current (in Amperes) f
ale4655 [162]

Answer:

I = 5000 A

Explanation:

We will use Ampere's Law to calculate the current:

B = \frac{\mu I}{2\pi r}\\\\

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,

1\ x\ 10^{-4}\ T = \frac{(4\pi\ x\ 10^{-7}\ N/A^2)(I)}{2\pi(10\ m)}\\\\I = \frac{(1\ x\ 10^{-4}\ T)(2\pi (10\ m))}{4\pi\ x\ 10^{-7}\ N/A^2}

<u>I = 5000 A</u>

4 0
3 years ago
Forest protect the soil from erosion ? True or False
Ivenika [448]

Answer:

<h2><em>True</em></h2>

Forests helps in binding the soil together. Thus, prevent soil from erosion.

4 0
2 years ago
Read 2 more answers
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