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3 years ago

12

It is known that a shark can travel at a speed of 17 m/s. How far can a shark go in 8 seconds? (please show steps to how you got

the answer)

1 answer:

Alex777 [14]3 years ago

4 0

Answer:

136 meters.

Explanation: If it can go 17 meters a second, then after 8 seconds, it will go 136 meters. Multiple 17 by 8 to get your answer.

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Which layer of ground contain organic matter and tiny rock particles

Bogdan [553]

A cuz the soil wi;l have the most tiny rock particularly i think feel free to ask any questions marked brailiest would be appreciated

3 0

3 years ago

Only 25% of the intensity of a polarized light wave passes through a polarizing filter. What is the angle between the electric f

Firdavs [7]

Answer: Only 25% of the intensity of a polarized light wave passes through a polarizing filter. Then the angle between the electric field and the axis of the filter will be 60 degrees.

Explanation: To find the answer of the problem given, we have to know about the Malu's law of polarization.

<h3>What is Malu's law of polarization?</h3>

This law states that, when a beam of completely polarized light is passed through an analyzer, then then intensity I of the transmitted light varies directly as the square of the angle $\alpha$ between the transmission direction of the polarizer and the analyzer.
The expression for this law will be,

$I=I_0cos\alpha$

Where, I₀ is the maximum intensity of the transmitted light through the polarizer.

<h3>How to solve the problem?</h3>

From the question, it is clear that, the 25% of the intensity of a polarized light wave passes through the filter.

$\frac{I}{I_0} =0.25\\$

Thus, the angle between electric field and the axis of the filter is,

$cos^2\alpha =0.25\\cos\alpha =\sqrt{0.25} =0.5\\\alpha =cos^-1(0.5)=60 degrees$

Thus, we can conclude that, the angle between the electric field and the axis of the filter will be 60 degrees.

Learn more about the Malus law of polarization here:

brainly.com/question/28020002

#SPJ4

4 0

2 years ago

If the frequency of an electromagnetic wave increases, does the number of waves passing by you increase, decrease, or stay the s

jarptica [38.1K]

Answer:

option(d)

Explanation:

The frequency of a wave is the property of the source of wave.

The velocity of all the electromagnetic waves is same as the speed of light. It only changes as the light passes through one medium to another.

The frequency is defined as the number of waves coming out from the source in 1 second.

As the frequency of wave increases, the number of wave coming per second increases.

So, the number of waves passing by increases but the speed remains same.

Option (d)

3 0

3 years ago

A wave travels at a frequency of 387 Hz. What is<br>the period of the wave?<br>

Ulleksa [173]

Answer:

¹/₃₈₇ second

Explanation:

<em>The period of a wave is the reciprocal of its frequency.</em>

So, simply, the frequency is ¹/₃₈₇ second(s), as that is the reciprocal of the frequency, 387 Hz.

5 0

4 years ago

A stone with a mass of 0.70 kg is attached to one end of a string 0.70 m long. The string will break if its tension exceeds 65.0

mixas84 [53]

Answer:v=8.06 m/s

Explanation:

Given

mass of stone $m=0.7 kg$

length of string $L=0.7 m$

Maximum Tension $T=65 N$

the string will not break if Centripetal Force is less than maximum tension

$T=\frac{mv^2}{r}$

$65=\frac{0.7\times v^2}{0.7}$

$v^2=65$

$v=\sqrt{65}$

$v=8.06 m/s$

4 0

3 years ago