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NISA [10]
3 years ago
10

As the bright sun shines upon the water, the water slowly disappears. The same sunlight gives energy to the surrounding plans to

convert water and carbon dioxide into sugar and oxygen gas which change is a physical and which is a chemical
Physics
1 answer:
mariarad [96]3 years ago
8 0

first is physical .... sec chem

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A water wave has a speed of 22.0 meters/second if the wave frequency is 0.0680 hertz what is the wavelength
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A raindrop falls to the ground from a raincloud at an altitude of 3000 meters.
Dmitrij [34]

Answer:

24.7 s

Explanation:

Question is appear to be missing. Found it on google:

"a) If there were no air resistance, how long would it take to fall?"

Solution:

We can solve the problem by using the following equation of motion for a uniform accelerated motion:

d=ut+\frac{1}{2}at^2

where

d = -3000 m is the displacement of the raindrop (negative because in the downward direction)

u = 0 is the initial velocity of the raindrop if we assume it starts from rest

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Solving the equation for t, we find:

t=\sqrt{\frac{2d}{g}}=\sqrt{\frac{2(-3000)}{-9.8}}=24.7 s

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