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3 years ago

There are many types of forces. Which statement best compares an electrical force to gravitational force?

2 answers:

6 0

The answer is B.

Opposite charges attract to each other. Alike charges repel each other. We’ve been taught this since elementary school. So, charges determine the electrical force.

Newton’s Law of Gravity essentially says the gravitational force is reliant on the mass of the two bodies and the distance squared between them.

To debunk answer A, you could think of magnets. Then compare that system to something like idk, a set of balls that are smaller than the magnets. According to A, the gravity between the balls would be from the electrical force which is beyond incorrect. And the force between the magnets is from gravity, which is also incorrect. Size doesn’t matter

Murrr4er [49]3 years ago

4 0

Answer: it is A.

Explanation:

Compare the electric force and gravitational force. ... Both forces are inversely proportional to the square of the distance between the objects, this is known as the inverse-square law. ... If there are two charges that are DIFFERENT, they attract.

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What kind of solid is crystalline boron

Ulleksa [173]

Answer:

It is a network solid, a lattice of many covalent bonds (like diamond, except that it is black rather than transparent).

Explanation:

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3 years ago

HELP, 40 POINTS !!

Lemur [1.5K]

1. Solubility

2. Heat 100g of water to 35 degrees C. Add 37 grams of mystery salt.

3. If all the salt dissolves, it's KCl. If not, it's KNO3.

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4 years ago

What does the law of conservation of energy state about energy in a closed system?

dezoksy [38]

Answer:

Energy cannot be created or destroyed.

Explanation:

According to the law of conservation of energy, energy can neither be created nor it can be destroyed. Energy can only be transformed from one matter to another. The conservation of energy remains constant in an isolated system. The law is applicable in the system that does not exchange energy in the environment. Energy changes its form but remains constant.

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3 years ago

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The arsenic in a 1.223 g sample of a pesticide was converted to H3AsO4 by suitable treatment. The acid was then neutralized, and

Vladimir79 [104]

Answer:

5.471% As₂O₃ in the sample.

Explanation:

...the reaction is: Ag+ + SCN- => AgSCN(s) Calculate the percent As2O3 in the sample. (F.W. As2O3 = 197.84 g/mol).

First, with the amount of KSCN we can find the moles of Ag in the filtrates. As we know the amount of Ag added we can know the precipitate of Ag and the moles of AsO₄ = 1/2 moles of As₂O₃ in the sample:

Moles KSCN = Moles Ag⁺ in the filtrate:

0.01127L * (0.100mol / L)= 0.001127moles Ag⁺

Total moles Ag⁺:

0.0400L * (0.0781mol/L) = 0.0031564 moles Ag⁺

Moles of Ag⁺ in the precipitate:

0.0031564 - 0.001127 = 0.0020294 moles Ag⁺

Moles AsO₄ = Moles As:

0.0020294 moles Ag⁺ * (1mol As / 3 moles Ag⁺) = 6.765x10⁻⁴ moles AsO₄

Moles As₂O₃:

6.765x10⁻⁴ moles AsO₄ * (1 mol As₂O₃ / 2 mol AsO₄) =

3.382x10⁻⁴ moles As₂O₃

Mass As₂O₃:

3.382x10⁻⁴ moles As₂O₃ * (197.84g/mol) = 0.0669g As₂O₃

Percent is:

0.0669g As₂O₃ / 1.223g sample * 100 =

<h3>5.471% As₂O₃ in the sample</h3>

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4 years ago

A tissue that has the ability to contract is

bonufazy [111]

Muscle tissue

Explanation: Muscle tissue is a soft tissue that makes up most of the tissues in the muscles of the human muscular system. It is the only type of tissue that has cells with the ability to contract. Skeletal muscle tissue is attached to bones by tendons.

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4 years ago

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