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In first condition R₁ = 36 $\Omega$  

In second condition R₂ = 18  $\Omega$

$P_1=\frac{V^2}{R_1}=\frac{{\left(240\right)}^2}{36}$               

$P_2=\frac{V^2}{R_2}+\frac{V^2}{R_2}=\frac{{\left(240\right)}^2}{18}+\frac{{\left(240\right)}^2}{18}$               

$P_2=\frac{{\left(240\right)}^2}{9}$               

So   $\frac{P_1}{P_2}=\frac{{\left(240\right)}^2/36}{{\left(240\right)}^2/9}=\frac{1}{4}$

x = 4

Let us make a table for the time taken:

(c)

Force  = Aya   $\Delta T$

Force $=\left(10\times 10^{-4}\right)\times \left(2\times 10^{11}\right)\times 10^{-5}\times 400$  

$F=8\times 10^{5}N$              

  $x\times 10^5=8\times 10^5$              

x = 8

Amp. a slit with

Intensity a (Amp)² a (slit width)²

  $\frac{l_1}{l_2}={\left(\frac{3}{1}\right)}^2=\frac{9}{1}\Rightarrow l_1=9I_2$

$\frac{l_{min}}{l_{max}}=\frac{{\left(\sqrt[]{l_1}-\sqrt[]{l_2}\right)}^2}{{\left(\sqrt[]{l_1}+\sqrt[]{l_2}\right)}^2}=\frac{{\left(3-1\right)}^2}{{\left(3+1\right)}^2}$            

  $\Rightarrow \frac{1}{4}=\frac{x}{4}$

x = 1.00

(b)

The total price of Guavas with Shweta is 5 * 28 = Rs. 140

The total price of the 26 Guavas whose price is not known is 140 – (3 + 8) = Rs. 129.

Assume that maximum number of Guavas with have price equal to Rs. 7

129 = 8 * 7 + 1 * 5 + 17 * 4. Therefore, the number of Guavas with Shweta whose price is less than the average price of the Guavas with Shweta is at least 17 + 1 = 18.

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(d)

The price of the 18 Pineapples with Shweta whose price is not known to us = X

X = 20 * 34 – (16 + 26 + 4 * 22 + 10 * 18) = Rs. 370

Assume that maximum number of Pineapples have price equal to 17

370 = 25 * 8 + 17 * 10. Number of pineapple with Shweta whose price is at least Rs. 25 is at most 8 + 1 = 9.

(d)

The total price of Mangoes with Shweta is 16 * 23 = Rs. 368.

Total price of 14 mangoes = 368 – (20 + 28) = Rs. 320

Out of the given 14 Mangoes assume that maximum number of Mangoes have price equal to Rs. 21.

The maximum price of any Mango out of these 14 Mangoes is Rs. 27

So, 9 * 21 + 1 * 23 + 4 * 27 = Rs. 320

Therefore, the number of Mangoes whose price is more than Rs. 21 is 1 + 4 + 1 = 6.

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Formula for Power = F·v cos $$$\theta$

According to the question, force is perpendicular.

So $\theta$ = 90

and cos 90 = 0

Hence, the result turns out to be 0 i.e. no power generated inspite of force being applied.

(a)

Total price of fruits with Shweta is 23 * 16 + 46 * 24 + 7 * 40 + 20 * 34 + 5 * 28 + 16 * 30 = Rs. 368 + Rs. 1104 + Rs. 280 + Rs. 680 + Rs. 140 + Rs. 480 = Rs. 3052. Total number of fruits with Shweta is 16 + 24 + 40 + 34 + 28 + 30 = 172. Average price of fruits with Shweta = (3052/172) = Rs. 17.74

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In simple words,

Energy = total work done on an object.

Power = how fast the work is done on an object.

For example: Writing an article vs how fast you write the article. This sums up the exact meaning of both these terms.