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allsm [11]
3 years ago
11

Choose the statement(s) that is/are true about an electric field. (i) The electric potential decreases in the direction of an el

ectric field. (ii) A positive charge experiences a force in the direction of an electric field. (iii) An electron placed in an electric field will move opposite to the direction of the field.
Physics
1 answer:
marishachu [46]3 years ago
7 0

Answer:

A positive charge experiences a force in the direction of an electric field.

Explanation:

Electric field is defined as the electric force acting per unit positive charge. Mathematically, it is given by :

E=\dfrac{F}{q}

We know that like charges repel each other while unlike charges attract each other. The direction of electric field is in the direction of electric force. For a positive charge the field lines are outwards and for a negative charge the electric field lines are inwards.

So, the correct option is (b) "A positive charge experiences a force in the direction of an electric field".

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What is the only planet where a day lasts longer than a year?
Ksivusya [100]

Answer:

Venus

Explanation:

Facts about Venus:

  • A day on Venus lasts little longer than a year on Venus.
  • Venus is the second largest planet in the solar system.
  • It completes one rotation every 243 Earth days.
  • Venus is called Earth's sister planet.
  • It is named after the Roman goddess of love and beauty.
  • Venus is one of the most hottest planet in our solar system.

3 0
3 years ago
If an object is not moving are the forces acting on it balanced? Yes or no?why?
xxMikexx [17]

This is another time to look at Newton's 2nd law of motion:

Net Force = (mass) x (acceleration)

If the object is not moving, then its acceleration is certainly zero, and Newton's law looks like this:

Net Force = (mass) x (zero)

or  Net Force = (zero) .

"Net Force = zero" means that if there ARE any forces acting on the object, then they add up to zero, and we call them "balanced" forces.

So the answer is '<em>yes</em>', and that's why.

6 0
3 years ago
A car moving at a speed of 20 m/s, then accelerates uniformly at until it reaches a speed of What distance does it travel during
Andru [333]
E because you have to drive
6 0
3 years ago
Mr. Miles zips down a water-slide starting at 15 m vertical distance up the scaffolding. Disregarding friction, what is the velo
lilavasa [31]

Answer:

The velocity of the Mr. miles is 17.14 m/s.

Explanation:

It is given that,

Mr. Miles zips down a water-slide starting at 15 m vertical distance up the scaffolding, h = 15 m

We need to find the velocity of the Mr. Miles at the bottom of the slide. It is a case of conservation of energy which states that the total energy of the system remains conserved. Let v is the velocity of the Mr. miles. So,

v=\sqrt{2gh}

g is the acceleration due to gravity

v=\sqrt{2\times 9.8\times 15}

v = 17.14 m/s

So, the velocity of the Mr. miles is 17.14 m/s. Hence, this is the required solution.

5 0
3 years ago
Bats have poor vision and use echo-location to find their way.The frequency produced by bats is 100kHz. If the speed of the soun
irga5000 [103]

The distance covered is 25.9 m.

<h3>How deep is the cave?</h3>

We know that the speed of sound refers to the speed with which an sound moves in an object.

Given that;

speed of sound = 345m/s

Time taken =  0.15s

We know that;

v = 2d/t

v = speed of sound

d = distance

t = time taken

vt = 2d

d = vt/2

d = 345m/s *  0.15s/2

d = 25.9 m

Learn more about speed of sound:brainly.com/question/15137350

#SPJ1

5 0
2 years ago
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