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dimaraw [331]
4 years ago
5

PLEASE HELP AND HURRY

Physics
1 answer:
andreyandreev [35.5K]4 years ago
7 0
C
I took the tests earlier hope this helps
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How do light travels
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Answer:

subway

Explanation:

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Human activities can have positive and negative effects on the environment. Humans can benefit natural areas by
svp [43]
The answer would be D , the rest are ways humans basically destroy nature
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4 years ago
The moon doesn't fall to earth because of it's friction?​
TiliK225 [7]

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The Moon does not fall towards Earth right now because Earth rotates itself. The energy from the Earth's own rotation around its axis is gradually tranferred into energy of the Moon's orbital motion. That's why the Earth's rotating speed decreases but the distance to the Moon increases.

4 0
3 years ago
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A 1500 kg car decelerates from an initial velocity of 19 m/s to a skidding stop. If the coefficient of kinetic friction is 0.100
Stella [2.4K]

Answer:

19.4 seconds

Explanation:

We have:

m: mass of the car = 1500 kg

v₀: is the initial speed = 19 m/s    

v_{f}: is the final speed = 0 (it stops)

\mu_{k}: is the coefficient of kinetic friction = 0.100

First, we need to find the acceleration by using the second Newton's law:

\Epsilon F = ma              

-\mu_{k}N = ma

-\mu_{k}mg = ma

Solving for a:

a = -\mu_{k}g = -0.1*9.81 m/s^{2} = -0.981 m/s^{2}

Now we can find the time until it stops:

v_{f} = v_{0} + at

Solving for t:

t = \frac{v_{f} - v_{0}}{a} = \frac{-(19 m/s)}{-0.981 m/s^{2})} = 19.4 s

 

Therefore, the time until it stops is 19.4 seconds.

I hope it helps you!                                            

7 0
3 years ago
How does the scientific process generally begin?
Murljashka [212]
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2. Doing a research (how to answer this question)
3. Creating a hypothesis (NOT a thesis!)
4. Experimenting (to prove the hypothesis)
5. Analysing results from the experiment
6. Writing a thesis
5 0
4 years ago
Read 2 more answers
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