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3 years ago

The current in a lightning bolt is 2.6 x 105

Physics

1 answer:

Harman [31]3 years ago

4 0

Answer:

The right solution is " $10.66\times 10^5 \ C$ ". A further explanation is given below.

Explanation:

The given values are:

Current,

I = $2.6\times 10^5$

Time,

t = 4.1 s

As we know,

⇒ $Q=I\times t$

On substituting the given values, we get

⇒ $=2.6\times 10^5\times 4.1$

⇒ $=1,066,000 \ C$

⇒ $=10.66\times 10^5 \ C$

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At what speed, as a fraction of c, does a moving clock tick at four fifth the rate of an identical clock at rest?

ololo11 [35]

Answer:

The seed as a fraction of the speed of light is $\frac{3}{5}c$

Solution:

As per the question:

Suppose, $t_{i}$ be the rate of an identical clock between two time intervals.

For a moving clock, moving with velocity 'v', at the clock tick of four-fifth:

t = $\frac{5}{4}t_{i}$

Now,

Using the relation of time dilation, from Einstein's relation:

$t = \frac{t_{i}}{\sqrt{1 - \frac{v^{2}}{c^{2}}}}$

$\frac{5}{4}t_{i} = \frac{t_{i}}{\sqrt{1 - \frac{v^{2}}{c^{2}}}}$

Squaring both sides:

$(\frac{5}{4})^{2} = (\frac{1}{\sqrt{1 - \frac{v^{2}}{c^{2}}}})^{2}$

$\frac{25}{16} = \frac{1}{{1 - \frac{v^{2}}{c^{2}}}}$

$1 - \frac{16}{25} = \frac{v^{2}}{c^{2}}$

$\frac{v}{c} = \sqrt{\frac{9}{25}}$

$\frac{v}{c} = \frac{3}{5}$

$v = \frac{3}{5}c$

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3 years ago

What is it when When humans control breeding of other organisms to favor certain traits

Vikki [24]

'Controlled Breeding', or selective breeding, is in genetics where people make animals reproduce to make favorable traits appear more often.

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3 years ago

A ball bounces changing velocity from vi=15m/s[D] to vf=15m/s[U] in t=0.01s. The balls acceleration is *

fomenos

Answer:

Option (A) is correct

Explanation:

a= (vf-vi)/ t

put the values

hence,

a= ( 15-15)/0.01

a=0

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3 years ago

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Radio waves from an fm station have a frequency of 103.1 mhz. if the waves travel with a speed of 3.00 ´ 10 m/s, what is the wav

ryzh [129]

The frequency of the radio waves from the fm station is:
$f=103.1 MHz = 103.1 \cdot 10^6 Hz$
And the speed of the waves corresponds to the speed of light:
$v=3 \cdot 10^8 m/s$
Therefore, the wavelength of the radio waves can be found by using the following equation:
$\lambda= \frac{v}{f}= \frac{3 \cdot 10^8 m/s}{103.1 \cdot 10^6 Hz}=2.91 m$

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3 years ago

Assume that the force of a bow on an arrow behaves like the spring force. In aiming the arrow, an archer pulls the drawstring ba

Alex

Answer:

v=39.05 m/s

Explanation:

Given that

x= 56 cm

F= 158 N

m= 58 g = 0.058 kg

Lets take spring constant = k

At the initial position,before releasing the arrow

F= k x

By putting the values

F= k x

158= 0.56 k

k=282.14 N/m

Now from energy conservation

Lets take final speed of the arrow after releasing

$\dfrac{1}{2}kx^2=\dfrac{1}{2}mv^2$

k x²=mv²

282.14 x 0.56² = 0.058 v²

v=39.05 m/s

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3 years ago