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scoundrel [369]
4 years ago
9

Which of these processes are chemical reactions?

Physics
1 answer:
Rudiy274 years ago
4 0
I’m not very good at this subject but I’d say it’s A Boiling an egg
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THE DOPPLER EFFECT. Anyways, it would have a higher whistle as it approaches you, when it gets to you it only gets quieter because it leaves after. Think of a motorcycle going by, its loud coming to you then as it passes it gets quieter.
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Which of the following is a physical change?
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A particle with charge +4.20 nC is in a uniform electric field E directed to the left. The charge is released from rest and move
Sonja [21]

Answer:

The  work done by the electric force is = +2.20*10^{-6} J

The potential of the starting point with respect to the end point is    = 523.8 V

The magnitude of E = 8730 \ N/C

Explanation:

Looking at this we can see that the work done by the electric force is equal to the kinetic energy this is because on the electric field is uniform and that the work done resulted in motion.

Mathematically

          \Delta V q = W

Where  \Delta V is the potential difference

              q is the charge whose value i given as  = 4.20 *10 ^{-9} C

               W is the workdone whose value is obtained as =  +2.20*10^{-6} J

  Substituting

                     \Delta V = \frac{W}{q}

                             =\frac{2.2*10^{-6}}{4,20*10^{-9}}

                               = 523.8 V

Mathematically  

                       \Delta V = Ed

        Where  E is the electric field strength

                       d is the distanced moved and it is given as 6.00 cm = 0.06 m

       Making E the subject of the formula

                    E = \frac{\Delta V}{d}

                      E  = \frac{523.8}{0.06}  = 8730 \ N/C

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luựchút tras dadats

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Explanation

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