3 years ago

When a light wave enters into a medium of different optical density,

1 answer:

6 0

I think it should be option (b)

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irina1246 [14]

Answer:

2,250J

Explanation:

W = Fs = (450)(5) = 2,250

4 0

2 years ago

vivado [14]

Answer is C...........

5 0

2 years ago

viktelen [127]

Answer:

$W=2.76\times 10^{-6}\ J$

Explanation:

Given that,

The distance between two spheres, r = 25 cm = 0.25 m

The capacitance, C = 26 pF = 26×10⁻¹² F

Charge, Q = 12 nC = 12 × 10⁻⁹ C

We need to find the work done in moving the charge. We know that, work done is given by :

$U=\dfrac{Q^2}{2C}$

Put all the values,

$U=\dfrac{(12\times 10^{-9})^2}{2\times 26\times 10^{-12}}\\\\U=2.76\times 10^{-6}\ J$

So, the work done is $2.76\times 10^{-6}\ J$ .

8 0

3 years ago

ch4aika [34]

True, They contain old stars and posses little gas or dust

6 0

2 years ago

barxatty [35]

D. 100 kilometers cuz the more kilometers the better the altitude!!!

6 0

3 years ago