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4 years ago

Negative charge in a conductor is a result of: lack of electrons neutralization by the atom's nucleus. surplus of electrons

Physics

2 answers:

Papessa [141]4 years ago

5 0

Answer:

surplus of electrons

Explanation:

Electron is a negatively charged particle and a proton is a positively charged particle.

A neutral atom contains equal number of protons and electrons. Electron can transfer from one atom to another. If an atom loses electrons, it becomes positively charged as the number of protons exceed the number of electrons in the atom. When the atom gains electrons, it becomes negatively charged as the number electrons exceed the number of protons.

Thus, a negative charge in a conductor is a result of surplus of electrons.

viva [34]4 years ago

4 0

<span>Negative charge in a conductor is a result of
surplus (too many) of electrons </span>

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A ball is thrown toward the ground. The figure shows the direction of the ball before it reaches the ground and the direction of

Kruka [31]

According to the principle of conservation of momentum, the momentum of the bouncing ball changes.

Also, the ball bounces less than its original height because some energy is lost due to heat, friction and air resistance.

<h3>How is momentum conserved in the bounce of balls?</h3>

The principle of conservation of momentum states that for any collision occurring in an isolated system, momentum is conserved.

a. For a body such as a ball dropped from a height, the total momentum is conserved.

However, there is a change in momentum of the ball as some of its momentum is transferred to the earth.

b. When the ball a ball of mass M is released from a height H1, it bounces to a height H2, which is about 1/2 of H1.

The value of H2 is less than that of H1 because some of the energy is converted to heat energy due to friction and air resistance, thereby its energy is less than its original value.

Therefore, the momentum of the bouncing ball is changes. Also, the ball bounces less than its original height because some energy is lost due to heat, friction and air resistance.

Learn more about momentum at: brainly.com/question/7538238

7 0

2 years ago

In the air, it had an average speed of 161616 \text{m/s}m/sstart text, m, slash, s, end text. In the water, it had an average sp

Marina86 [1]

Answer:

The amount of time the stone fall in the air, t₁, is 7 seconds and

The amount of time the stone fall in the water, t₂, is 5 seconds

Explanation:

Here, we have the average speed of the stone in air = 16 m/s

The average speed of the stone in water = 3 m/s

Total distance from top of cliff to sea bed = 127 meters

Total time of fall = 12 seconds

Therefore

Let t₁ = time of the stone in air and

t₂ = time of the stone in water

Therefore, t₁ + t₂ = 12 s........(1)

16·t₁ + 3·t₂ = 127............(2)

From (1) t₁ = 12 - t₂

16×(12 - t₂) + 3×t₂ = 127

From which 13·t₂ = 65

and t₂ = 5 seconds

∴ t₁ = 12 - t₂ = 12 - 5 = 7 seconds

The amount of time the stone fall in the air is t₁ = 7 seconds and

The amount of time the stone fall in the water is t₂ = 5 seconds.

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3 years ago

Warm air and water rise because...

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We know that an object floats in a fluid if the density of the object is less than the density of the fluid. When some air or water is heated, it expands. That makes its density less than cooler air or water, so it floats in them.

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