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makvit [3.9K]
3 years ago
7

Which of the following is NOT an indicator of a physical change?

Physics
1 answer:
S_A_V [24]3 years ago
8 0

Answer:

1.  C.  The change is easily reversible

2. A.  a physical change

Explanation:

Happy Holidays

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Use Coulomb’s law to derive the dimension for the permittivity of free space. <br><br><br><br>​
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Answer:

Coulomb's law is:

F = \frac{1}{4*pi*e0} *(q1*q2)/r^2

First, force has units of Newtons, the charges have units of Coulombs, and r, the distance, has units of meters, then, working only with the units we have:

N = (1/{e0})*C^2/m^2

then we have:

{e0} = C^2/(m^2*N)

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then the dimensions of e0 are:

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F = C^2*S^2/m^2

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7 0
3 years ago
Please help me guys never mind the calculations ​
vlada-n [284]

The shape is connected in parallel so;

5.1) Ans;

\frac{1}{R}  =  \frac{1}{R1} +  \frac{1}{R2}   \\  \frac{1}{R}  =  \frac{1}{2}  +  \frac{1}{3}  \\  \frac{1}{R}  =  \frac{3 + 2}{6}  =  \frac{5}{6}  \\ R =  \frac{6}{5}  = 1.2 \:  \: ohm

5.2) Ans;

\frac{1}{R}  =  \frac{1}{R1} +  \frac{1}{R2}   \\  \frac{1}{R}  =  \frac{1}{8}  +  \frac{1}{10}  \\  \frac{1}{R}  =  \frac{5 + 4}{40}  =  \frac{9}{40}  \\ R =  \frac{40}{9}  = 4.4 \:  \: ohm

I hope I helped you^_^

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