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Scilla [17]
3 years ago
12

One of the signs a chemical reaction is taking place

Physics
1 answer:
ladessa [460]3 years ago
6 0

Answer:  One of the signs a chemical reaction is taking place is the presence of bubbles. :)

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An athlete kicks a soccer ball that starts at rest so that it leaves their foot with a speed of 10m/s from the top o f a rectang
kirza4 [7]

Answer:

a=500m/s^2

Explanation:

We need only to apply the definition of acceleration, which is:

a=\frac{v_f-v_i}{t_f-t_i}

In our case the final velocity is v_f=10m/s, the initial velocity is v_i=0m/s since it departs from rest, the final time is t_f=0.02s and the initial time we are considering is t_i=0s

So for our values we have:

a=\frac{10m/s-0m/s}{0.02s-0s}=500m/s^2

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AlekseyPX
The density of the material would be 
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to obtain the result above this is what we do:
density is calculated as: (the mass of the given material or object) / volume of the material 
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