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3 years ago

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1. Describe two major differences between transverse and longitudinal waves.

1 answer:

Kitty [74]3 years ago

7 0

In a transverse wave the particles of the medium vibrate at right angles to the direction of wave travel.
In a longitudinal wave the particles of the medium vibrate parallel to the direction of wave travel.
A piano string exhibits transverse motion.
Sound in a fluid (air) travels as a longitudinal wave.

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According to the third law of planetary motion, the period of revolution of a planet is related to the planet’s _____.

matrenka [14]

Distance from the sun.

<span>The third law of planetary motion states that the square of the orbital period of a planet is proportional to the cube of the semi-major axis of its orbit</span>. The semi-major axis is the distance from the sun to the epicenter of the ellipse (which would be the planet in question). So, the revolutionary period is directly related to the distance of the planet from the sun.

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3 years ago

Read 2 more answers

Gina applied 1,780 J of work to move a sofa 3.8 meters. What amount of force did she exert?

Gnoma [55]

Answer:

468.42N

Explanation:

Here,

Work done(W)=1780J

Displacement(s)=3.8m

As we have,

Work=Force×displacement

Now,

$\hookrightarrow 1780J=F\times3.8m\\\\\hookrightarrow \frac{1780J}{3.8m} =F\\\\\hookrightarrow F=468.42N$

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2 years ago

Convert 9.83 m/s with a radius of 0.85 m to rotations per minute (rpm)

marissa [1.9K]

Answer: Conversion of 9.83 m/s with a radius of 0.85 m into rotations per minute (rpm) is $99.25 m^{-1}$ .

Explanation:

Given: Speed = 9.83 m/s

Convert m/s into m/minute as follows.

$1 min = 60 sec\\9.83 m/s = 9.83 m/s \times \frac{60 s}{1 min}\\= 529.8 m/min$

Radius = 0.85 m

Now, rotations take place in circular motion. So, the circumference of a circle is $2 \pi r$ .

Therefore, circumference is calculated as follows.

$Circumference = 2 \times pi \times r\\= 2 \times 3.14 \times 0.85 m\\= 5.338 m$

Formula used to calculate rotations per minute (rpm) are as follows.

$rpm = \frac{speed (in meter per minute)}{circumference}\\= \frac{529.8 m/min}{5.338 m}\\= 99.25 m^{-1}$

Thus, we can conclude that conversion of 9.83 m/s with a radius of 0.85 m into rotations per minute (rpm) is $99.25 m^{-1}$ .

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3 years ago

Which one of these statements is not true?

natka813 [3]

Answer:d

Explanation:

It’s right

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3 years ago

If the relative humidity is 50 percent and the air temperature is 35°C, will the dew point be reached if the temperature falls t

zzz [600]

The correct answer is no, the dew point will not be reached. The dew point would also fall with the temperature, but at a lesser degree of decline.

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4 years ago