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sashaice [31]
2 years ago
12

How Fast Is Lightning?

Physics
1 answer:
Digiron [165]2 years ago
8 0
The return stroke (the current that cause the visible flash) moves upward at a speed of about 320,000,000 ft per second or about 220,000,000 miles per hour (about 1/3 the speed of light).
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In a home's central heating system, when the room temperature measured by the thermostat reaches a set value, the thermostat sen
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These actions are an example of feedback.
Given that the room has reached the desired temperature, there is no more need for it to be heated, at least until the temperature drops a bit. This is why the thermostat sends feedback about this situation to the heater, which immediately switches off until it is needed again.
3 0
2 years ago
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Suppose that a simple pendulum consists of a small 81 g bob at the end of a cord of negligible mass. If the angle θ between the
MariettaO [177]

Answer:

(a) 0.115 m

(b) 2.08 x 10^-5 J

Explanation:

mass of bob, m = 81 g = 0.081 kg

The equation of oscillation is given by

θ = 0.068 Cos {9.2 t + Ф}

Now by comparison

The angular velocity

ω = 9.2 rad/s

(a) \omega^{2} =\frac{g}{L}

where, L be the length of the pendulum

L =\frac{g}{\omega ^{2}}

L =\frac{9.8}{9.2 \times 9.2}

L = 0.115 m

(b) A = L Sinθ

A = 0.115 x Sin 0.068

A = 7.8 x 10^-3 m

Maximum kinetic energy

K = 0.5 x mω²A²

K = 0.5 x 0.081 x 9.2 x 9.2 x 7.8 x 7.8 x 10^-6

K = 2.08 x 10^-5 J

8 0
3 years ago
It requires 0.30 kJ of work to fully drive a stake into the ground. If the average resistive force on the stake by the ground is
LenaWriter [7]

Answer:

Length of the stake will be 0.3623 m

Explanation:

We have given energy required to fully drive a stake into ground = 0.30 KJ = 300 J

Average resistive force acting on the floor is equal to F = 828 N

We have to find the length of the stake

We know that work done is given by

W = Fd, here W is work done , F is average force and d is the length of the stake

So 300 = 828×d

d = 0.3623 m

So length of the stake will be 0.3623 m

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3 years ago
Compared to yellow light, orange light has
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<span>So we want to know what does orange light has when we compare it to yellow light. So when we take a look at the electromagnetic spectrum we can see that orange color has longer wavelength than yellow color. So the correct answer is A. alonger wavelength.</span>
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3 years ago
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A ball is thrown upward from a height of 1152 feet above the​ ground, with an initial velocity of 96 feet per second. From physi
Tanzania [10]

Answer:

A IS CORRECT

Explanation:

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2 years ago
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