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3 years ago

In an object's net charge positive or negative if it loses electrons?

1 answer:

7 0

<span>Answer: If a neutral atom gains electrons, then it will become negatively charged. If a neutral atom loses electrons, then it become positively charged. 6. Determine the quantity and type of charge on an object that has 3.62 x 1012 more protons than electrons.</span>

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A square plate of copper with 50.0-cm sides has no net charge and is placed in a region of a uniform electric field of 80.0 kN/C

torisob [31]

Answer:

σ = ±708 nC/m²

Q = ±177 nC

Explanation:

given data

Side of copper plate L = 50 cm

Electric field, E = 80 kN/C

solution

we get here Charge density,σ that is express as

σ = E x ε₀ ....................1

here ε₀ is Permittivity of free space that is 8.85 x 10⁻¹² C²/Nm²

so put value in eq1we get

σ = 80 x 10³ x 8.85 x 10⁻¹²

σ = 708 x 10⁻⁹ C/m²

σ = 708 nC/m²

and

now we get here total change on each faces

Q = σ A ...............2

Q = 708 x 10⁻⁹ x (0.50)²

Q = 177 nC

3 0

3 years ago

The rainforest is hot, humid, and has frequent rainfall. In what way do the atmosphere and the hydrosphere contribute to this ty

il63 [147K]

Answer:

The atmosphere which contains nitrogen, oxygen, carbon dioxide, and other gases essential for life, contributes to the rainforest climate. The rainforest is hot, humid and helps balance the amount of carbon dioxide in the atmosphere by absorbing it and releasing more oxygen which is important for climate change.

The hydrosphere, which is the combination of various types of water sources and types found in air, in the form of water vapor; water found below the earth's surface and above, also contributes to the rainforest climate. The frequent rainfall dictates the vegetation growth in that area which also creates weather patterns due to the contribution of the atmosphere and the hydrosphere. The hydrosphere is important in the formation of rain. A rainforest of frequent rainfall indicates a large amount of the combination of various types of water sources and types found in a particular area, which release the water back onto the rainforest.

7 0

3 years ago

Which exerts more force, the Earth pulling on the moon or the moon pulling on the Earth? Explain.

prohojiy [21]

Answer: the earth

Explanation: Earth exerts a gravitational pull on the moon 80 times stronger than the moon's pull on the Earth. Over a very long time, the moon's rotations created fiction with the Earth's tugging back, until the moon's orbit and rotational locked with Earth.

and that's why the earth pulls the moon

6 0

3 years ago

When a government pays ranchers to reduce the number of milk cows they have, it is known as a what ?

tankabanditka [31]

I say a subsidy because the government is controlling how many cows they have.

8 0

3 years ago

Read 2 more answers

Match the law of thermodynamics to its definition. 1. zeroth The tendency of the universe is to increase entropy. 2. first Two o

netineya [11]

Answer:

1. zeroth --> Two objects in thermal equilibrium will have no net heat flow between them.

2. first --> Heat can change energy from one form to another, but the amount of energy in the universe is constant.

3. second --> The tendency of the universe is to increase entropy.

Explanation:

1. The zeroth law of thermodynamics states that:

"If object A is in thermal equilibrium (=same temperature) with object B, and object B is in thermal equilibrium with object C, then object A and object C are in thermal equilibrium as well". According to this, there is no heat flow between two objects in thermal equilibrium: in fact, two objects in thermal equilibrium have same temperature, so they have same thermal energy, therefore heat does not flow spontaneously from one object to the other. Heat flows spontaneously only if there is a temperature difference between the two objects.

2. The first law of thermodynamics states that:

"The variation of internal energy of a system is given by the sum between the heat absorbed by the system and the work done by the surrounding on the system itself". In formula:

$\Delta U = Q + W$

where $\Delta U$ is the variation of internal energy of the system, Q is the heat absorbed by the system and W the work done by the environment on the system. A result of this law is that energy cannot be created nor destroyed, but only converted from one form to another.

3. The second law of thermodynamics states that:

"The total entropy of an isolated system can never decrease over time".

Entropy of a system is a measure of its degree of "disorder": the higher the entropy, the more disordered the system is. In nature, every system tends to go to a state of more entropy, and since the universe can be thought as an isolated system, the tendency of the universe is to increase its entropy.

8 0

3 years ago