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3 years ago

What is the initial position

Physics

1 answer:

labwork [276]3 years ago

6 0

Answer:

Initial position of a body is the position of the body before accelerating or increasing its velocity the position changes and then that position is the final position.

hope it is helpful...

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Two positive charges are fixed a distance apart.the sun of their charges is Qt.what charge must each have in order to maximise t

romanna [79]

Answer:

Both charges must have the same charge, Qt/2.

Explanation:

Let the two charges have charge Q1 and Q2, respectively.

Use Coulombs's Law to find an expression for the force between the two charges.

$F = k_e\frac{Q_1Q_2}{r^2}$ , where

Ke is Coulomb's contant and

r is the distance between the charges.

We know from the question that

Q1 + Q2 = Qt

So,

Q2 = Qt - Q1

$F = k_e\frac{Q_1(Q_t - Q_1)}{r^2}$

Simplify to obtain,

$F = \frac{k_e}{r^2} (Q_tQ_1 - Q_1^2)$

In order to find the value of Q1 for which F is the maximum, we will use the optimization technique of calculus.

Differentiate F with respect to Q1,

$\frac{dF}{dQ_1} = \frac{k_e}{r^2} (Q_t - 2Q_1)$

Equate the differential to 0, to obtain the value of Q1 for which F is the maximum.

$\frac{k_e}{r^2} (Q_t - 2Q_1) = 0\\Q_t - 2Q_1 = 0\\2Q_1 = Q_t\\Q1 = \frac{Q_t}{2}$

It follows that

$Q_2 = \frac{Q_t}{2}$ .

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3 years ago

Answer quick to get brain list but not wrong

Studentka2010 [4]

Answer:

option c.

option c.38° and 42°

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3 years ago

What is the purpose of the material surrounding the metal inside the lamp cord?

Tamiku [17]

The prongs on the plug and the wire inside the cord are metal but they are surrounded by plastic or rubber insulation so you do not get shocked when you touch the cord

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Natasha_Volkova [10]

Answer:

Without units, the results are unclear and it is hard to keep track of what each seperate measurement entails.

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