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Deffense [45]
4 years ago
7

We can model a lightning bolt as a very long, straight wire. If a lightning bolt carries a current of 30 kA, and you are unfortu

nate enough to be 8.9 m away from the lightning bolt, how large of a magnetic field do you experience
Physics
1 answer:
Liula [17]4 years ago
8 0

Answer:

Magnetic field experienced = 4.5 × 10⁻⁴ T

Explanation:

The magnetic field around an infinite straight current-carrying wire at a distance r from the wire is given by

B = (μ₀I)/(2πr)

B = ?

I = 20 KA = 20000 A

r = 8.9 m

μ₀ = magnetic permeability = 1.257 × 10⁻⁶ T.m/A

B = (1.257 × 10⁻⁶ × 20000)/(2π×8.9) = 4.5 × 10⁻⁴ T

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The capacity of the air to hold water vapor: Group of answer choices 1. decreases with an increase in temperature.2. increases w
Nezavi [6.7K]

Answer:

3. increases with an increase in temperature.

Explanation:

The air more water vapor at higher temperatures because at higher temperatures the air expands and the inter-molecular space increases so the room for water molecules increases.

Warm air keeps the water molecules warm and prevents them from condensing.

The air can hold the moisture only upto its saturation quantity after which the precipitation occurs in the form of rain, snow, hail, sleet etc.

5 0
3 years ago
Read 2 more answers
When you walk with a cup of coffee (diameter5 cm) at just the
vladimir1956 [14]

Answer:

10 cm/sec

Explanation:

using formula velocity = frequency * wave length

where: f=1/T

1/1=1

so frequency will be 1HZ ( due to 1 oscillation in 1 sec)

wave length will be 10 cm because while sloshing cup hold (1/2) half full length.

velocity = 1*10 = 10cm/sec.

velocity = 10 cm/sec

4 0
3 years ago
What does not affect the gravitational potential energy of an object
natta225 [31]
Anything really like velocity? as long as its not mass, gravity, and height

Ep = mgh

Those are the only variables that affect potential energy
8 0
3 years ago
Read 2 more answers
Which ball has the greater acceleration at the instant of release?
yuradex [85]

They're equal.

Ignoring air resistance, any object you're not holding onto has the same, constant acceleration ... 9.8 m/s^2 down ... from the moment it leaves your hand until the moment it hits the ground.

It doesn't matter how heavy the object is, and it doesn't matter whether you throw it up, down, or sideways, or just let go and let it drop.

6 0
3 years ago
A passenger walks from one side of a ferry to the other as it approaches a dock.Passenger's velocity is 1.55 m/s due north relat
victus00 [196]

Answer:\theta =33.22^{\circ}

Explanation:

Given

Velocity of Passenger w.r.t to Ferry

v_{pf}=v_p-v_f=1.55\hat{j}-------1

Velocity of Passenger w.r.t to water

v_{pw}=v_p-v_w=4.5\left ( -\hat{i}+\hat{j}\right )--------2

Subtract 2 from 1

v_f-v_w=-4.5\hat{i}+2.95\hat{j}

(b)direction

tan\theta =\frac{2.95}{4.5}=0.655

\theta =33.22^{\circ} North of west

5 0
4 years ago
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