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Brums [2.3K]
3 years ago
13

When a molecule has its bonds break, it sometimes gives off energy. This energy is the absorbed by the matter around it, increas

ing the speed of the molecules. How is this increased speed in the molecules measured?
Mathematics
1 answer:
Lorico [155]3 years ago
4 0

Answer:

i believe by  Temperature

Step-by-step explanation:


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A submarine cruises underwater at 20 km/h and on
Darina [25.2K]

Answer:

System of equations:

20x + 30y = 650

x + y = 25

Time underwater = 10 hours

Time at the surface = 15 hours

Step-by-step explanation:

Let x = time underwater at 20 km/h.

Let y = time on the surface at 30 km/h.

speed = distance/time

distance = speed * time

distance underwater: 20x

distance on the surface: 30y

total distance: 650

20x + 30y = 650

total time: x + y

total time: 25

x + y = 25

20x + 30y = 650

x + y = 25

20x + 30y = 650

-20x - 20y = -500

--------------------------------

          10y = 150

              y = 15

x + y = 25

x + 15 = 25

x = 10

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3 years ago
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Natasha_Volkova [10]
I'm pretty sure It's  5x - y = -6

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artcher [175]

Answer:

18pq-p^2

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Find the value of [-4+3]-8
svp [43]
<span>[-4+3]-8
= </span><span>-1 - 8
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---------------

</span>
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Hope this helps you!!!

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