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DanielleElmas [232]
3 years ago
6

Which of the following descriptions explains the process of water freezing? A) Water molecules speed up until they escape into a

different phase. B) Water molecules slow down until they begin to bond together C) Water molecules are squeezed together by high pressure until they begin to stick to one another. D) As water molecules cool, their shape changes from rounded to irregular, making them more likely to link to one another.
Physics
2 answers:
scZoUnD [109]3 years ago
8 0

Answer:

B

Explanation:

egoroff_w [7]3 years ago
7 0

Answer: B. Water molecules slow down until they begin to bond together

Explanation:                                                                                                                                  When the water is to be cooled, the molecules start to slow down and becomes no longer energetic which means that they are going to bond together.

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The best choice would be letter C hope this helps
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You and your friends are at the lake on a particularly sunny day. Use specific heat capacity to explain why the sand on the shor
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Answer:

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2 years ago
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A driver in a 2000 kg Porsche wishes to pass to pass a slow-moving school bus on a four-lane road. What is the average power in
Kryger [21]

The average power is 3.0\cdot 10^6 W

Explanation:

First of all, we calculate the work done to accelerate the car; according to the work-energy theorem, the work done is equal to the change in kinetic energy of the car:

W=K_f -K_i= \frac{1}{2}mv^2-\frac{1}{2}mu^2

where :

K_f = \frac{1}{2}mv^2 is the final kinetic energy of the car, with

m = 2000 kg is the mass of the car

v = 60 m/s is the final speed of the car

K_i = \frac{1}{2}mu^2 is the initial kinetic energy of the car, with

u = 30 m/s is initial speed of the car

Soolving:

W=\frac{1}{2}(2000)(60)^2 - \frac{1}{2}(2000)(30)^2=2.7\cdot 10^6 J

Now we can find the power required for the acceleration, which is given by

P=\frac{W}{t}

where

t = 9 s is the time elapsed

Solving:

P=\frac{2.7\cdot 10^6}{9}=3.0\cdot 10^6 W

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brainly.com/question/7956557

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8 0
3 years ago
Would anyone be kind enough to help me? :)
Travka [436]

Answer:

The racetrack is 996.7 meters long

Explanation:

Convert 251km/h to km/s (kilometers per second)

3600 seconds in an hour, so:

251/3600 = 0.0697km/s

Convert km/s to m/s (meters per second)

1000 meters in a kilometer, so:

0.0697*1000 = 69.7m/s

Find length of racetrack:

69.7m/s*14.3s = 996.7m

If the racer travels 69.7 meters in one second and it takes 14.3 seconds to complete a lap, the racetrack is 996.7 meters long.

6 0
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Westkost [7]

Answer:

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