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Stella [2.4K]
3 years ago
13

Lightning occurs when there is a flow of electric charge (principally electrons) between the ground and a thundercloud. The maxi

mum rate of charge flow in a lightning bolt is about 20,000C/s; this lasts for 100μs or less. How much charge flows between the ground and the cloud in this time?
Physics
1 answer:
Korolek [52]3 years ago
8 0

Answer:

2C  charge will flow from ground and cloud

Explanation:

We have given rate rate of flow of charge \frac{dq}{dt}=20000C/sec

Time is given as t=100\mu sec=100\times 10^{-6}=10^{-4}sec

WE have to find the how much charge flows between the ground and cloud in this time

So the charge flow is given by \frac{dq}{dt}\times t=20000C/sec\times 10^{-4}=2C

So 2C  charge will flow from ground and cloud

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How are meteors and meteorites different?
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3 years ago
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Which force is always pulling but never pushes and is directly influenced by mass
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3 years ago
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To get off a frozen lake, a 70 kg person removes his shoe of mass 0.175 kg and throws it horizontally away from the shore at a v
MakcuM [25]

Answer:

the person will be in the shore at 10.73 minutes after launch the shoe.

Explanation:

For this we will use the law of the lineal momentum.

L_i = L_f

Also,

L = MV

where M is de mass and V the velocity.

replacing,

M_i V_i = M_{fp}V_{fp} + M_{fz}V_{fz}

wher Mi y Vi are the initial mass and velocity, Mfp y Vfp are the final mass and velocity of the person and Mfz y Vfz are the final mass and velocity of the shoe.

so, we will take the direction where be launched the shoe as negative. then:

(70)(0) = (70-0.175)(V_fp) + (0.175)(-3.2m/s)

solving for V_fp,

V_fp = \frac{(3.2)(0.175)}{69.825}

V_fp = 0.008m/s

for know when the person will be in the shore we will use the rule of three as:

1 second -------------- 0.008m

t seconds-------------- 5.15m

solving for t,

t = 5.15m/0.008m

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3 0
3 years ago
Historically, use of fossil fuels has lead to all of the following except:
kicyunya [14]

Use of fossil fuels has not lead to increased use of wood as heat source.

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Thus, before the introduction of fossil fuels, wood is used as the igniting source for heat energy. But the entry of fossil fuels have reduced the use of wood as igniting source in cooking, burning etc.

Thus, the use of fossil fuels have increased exchange of culture and ideas as fuels are mostly imported from other nations, it lead to development of faster transportation methods and increased the availability of products including heat, plastics and medicine. But similarly, the use of fossil fuels have not increased the use of wood as heat source, instead it decreased the use of wood as heat source.

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