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erma4kov [3.2K]
4 years ago
6

Without heat from the Sun, the water cycle would A) reverse. B) not work. C) slow down. D) not be affected.

Physics
2 answers:
Arisa [49]4 years ago
6 0

The correct answer is B) not work

Explanation:

The water cycle is a natural complex process through which water flows between the atmosphere, the surface of Earth and other systems of the Earth. In this cycle, the heat emitted by the Sun plays an essential role because due to this, water on the surface evaporates and goes to the atmosphere where it forms clouds that later condensate, which makes water go back to the surface of Earth. This implies without heat from the Sun water would not evaporate and as a result, the water cycle would stop or would not work.

Tanzania [10]4 years ago
4 0
B) not work ,because the water would freeze
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What is the prefix notation of 0.0000738?​
MrMuchimi

Answer:

7.38 × 10-5

Explanation:

All numbers in scientific notation or standard form are written in the form m × 10n, where m is a number between 1 and 10 ( 1 ≤ |m| < 10 ) and the exponent n is a positive or negative integer.

To convert 0.0000738 into scientific notation, follow these steps:

Move the decimal 5 times to the right in the number so that the resulting number, m = 7.38, is greater than or equal to 1 but less than 10

Since we moved the decimal to the right the exponent n is negative

n = -5

Write in the scientific notation form, m × 10n

= 7.38 × 10-5

Therefore, the decimal number 0.0000738 written in scientific notation is 7.38 × 10-5 and it has 3 significant figures.

Answer = 7.38 × 10-5

4 0
3 years ago
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A small remote-control car with a mass of 1.65 kg moves at a constant speed of v = 12.0 m/s in a vertical circle inside a hollow
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Answer:

N=63.69N

Explanation:

The normal force exerted on the car by the walls of the cylinder at the bottom of the vertical circle will be such that when substracted to the weight it must give the centripetal force, since at that point on the vertical F_{cp}=N-W=N-mg

We also know that the equation for the centripetal force is:

F_{cp}=ma_{cp}=\frac{mv^2}{r}

Mixing both equations we get:

N-mg=\frac{mv^2}{r}

N=mg+\frac{mv^2}{r}

Which for our values means:

N=(1.65Kg)(9.8m/s^2)+\frac{(1.65Kg)(12m/s)^2}{(5m)}=63.69N

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3 years ago
Five friends each do the same amount of work lifting crates up onto shelves. The time it took each person are shown below in the
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Grace, Erin, and Tony are on a seesaw. Grace has a mass of 45kg and is seated 0.7m to the left of the fulcrum. Nicole has a mass
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3 years ago
What frequency is received by the ambulance after reflecting from a wall near the person watching the oncoming ambulance (as in
ElenaW [278]

Answer:

f=896Hz

Explanation:

Given data

Vs(speed of the ambulance)={(104 km/h)*(1000m*(1 h/3600)}=28.9m/s

f(frequency of the ambulance siren)=821 Hz

v(speed of sound)=345 m/s

Vo(speed of the observer)=0 m/s

To find

f(The ambulance is approaching the person)

Solution

From Doppler effect

f^{i}=(\frac{v+v_{o} }{v-v_{s} })f

As the ambulance approaches the we assign a positive sign for speed "vs" of the ambulance

So

f^{i}=(\frac{v+0}{v-(+v_{s}) } )f\\f^{i}=(\frac{v}{v-v_{s} } )f

Substitute the values from given data

f^{i}=(\frac{345m/s}{345m/s-28.9m/s} )821Hz\\f^{i}=896Hz

5 0
3 years ago
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