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Kipish [7]
3 years ago
13

Two positive point charges, each with charge q, separated by a distance d, repel each other with a force of magnitude 20 N. What

is the magnitude of the force between two positive point charges of magnitude 11.11 q, separated by a distance 2.5 d in units of N
Physics
1 answer:
Doss [256]3 years ago
3 0

Answer:

The value is  F_2 =  395 \  N

Explanation:

From the question we are told that

   The magnitude of the charge of each positive charge for the first case is q_1 = q_2 =  q

   The distance between the charges for the first case is  d

   The  force between the charges for the first case  is  F =  20 \ N

     The magnitude of the charge of each positive charge for the second case is q_1 = q_2=11.11q

     The  distance between the charge for the second case is 2.5d

 

Generally for the first case the force between the charge is mathematically  represented as

       F_1 = \frac{k * q^2 }{d^2}

Where k is the Coulomb constant with value   k =  9*10^{9} \ kg\cdot m^3\cdot s^{-4} \cdot A^{-2}.

  So  

     20= \frac{k * q^2 }{d^2}

Generally for the second  case the force between the charge is mathematically  represented as

       F_2 =  \frac{k *  (11.11q)^2}{(2.5d)^2}

       F_2 =  \frac{k * 11.11^2 *q^2}{2.5^2d^2}

=>      F_2 =  \frac{11.11^2}{2.5^2}  F_1

=>      F_2 =  \frac{11.11^2}{2.5^2} * 20

=>      F_2 =  395 \  N

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A blow-dryer and a vacuum cleaner each operate with a voltage of 120 V. The current rating of the blow-dryer is 12 A, while that
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Answer:

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Explanation:

Power consumed = IV

I is the current rating

V is the operating voltage

If a blow-dryer and a vacuum cleaner each operate with a voltage of 120 V and the current rating of the blow-dryer is 12 A, while that of the vacuum cleaner is 4.7 A then their individual power rating is calculated thus;

a) For blow-dryer

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Its current rating = 12A

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b) For vacuum cleaner:

Operating voltage is the same as that of blow dryer = 120V

Its current rating = 4.7A

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c) Energy used = Power consumed × time taken

Energy used = Power × time

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= 564×2760

= 1,556,640Joules

Ratio of the energy used by the blow-dryer in 20 minutes to the energy used by the vacuum cleaner in 46 minutes will be 1,728,000/1,556,640 = 1.11

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Answer:

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Explanation:

First we need to find our mass. For this purpose we use the following formula:

W = mg

m = W/g

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Therefore,

m = (675 N)/(9.8 m/s²)

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Now, we need to find the value of acceleration due to gravity on the surface of Neutron Star. For this purpose we use the following formula:

gn = (G)(Mn)/(Rn)²

where,

gn = acceleration due to gravity on surface of neutron star = ?

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Therefore,

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