PLS HELPPPPP

Which statements correctly describe the effect of distance in determining the gravitational force and the electrical force? Chec

Luda [366]

Answer:

The gravitational force is inversely proportional to the square of the distance..

The electrical force is inversely proportional to the square of the distance..

Explanation:

From the Newton's law of universal gravity, we understood that the force of attraction between the masses two objects is inversely proportional to the square of the distance apart. Mathematically, it is expressed as:

F = GM1M2/r²

Where:

M1 and M2 are the masses of two objects measured in kilograms (Kg).

G is the gravitational constant with a value of 6.67×10¯¹¹ Nm²/Kg²

r is the distance apart measured in metre (m).

F is the force of attraction measured in Newton (N).

From the equation:

F = GM1M2/r²

The force (F) is inversely proportional to the square of the distance (r) apart. This means that the greater the distance apart, the smaller the force of attraction and the smaller the distance apart, the greater the force of attraction between the masses of the object.

From Coulomb's Law, we understood that the force of attraction between two charged particles is inversely proportional to square of the distance. Mathematically, it expreessed as

F = Kq1q2/ r²

Where:

q1 and q2 are charges of two objects measured in coulomb (C) .

r is the distance apart measured in metre (m)

K is the electrostatic constant with a value of 9×10^9 Nm²/C²

F is the force measured in Newton (N).

From the equation:

F = Kq1q2/ r²

The force (F) is inversely proportional to the square of the distance (r) apart.. This implies that as the distance between the charged particles increase, the smaller the force of attraction between them and as the distance between the charged particles decrease, the greater the force of attraction between the two charged particles.

6 0

3 years ago

PLSSS HELP

blondinia [14]

Answer: With each input, there is an output, a recipe requires certain ingredients, and certain amounts of each. A recipe calls for measurements, missing something can ruin it, just like a chemical formula, take something out or add something else, you get something completely different. when putting things together to make something you have to make sure what your putting in, will give you the product you want as the output.

Explanation:

8 0

3 years ago

How many atoms of K are present in 195.49 grams of K? 3.0110 × 1024 6.0220 × 1024 1.1772 × 1026 4.5797 × 1027

Ierofanga [76]

<h2>Hello!</h2>

The answer is: $3.0110x10^{24}$

First, we need to look for the K molecular mass:

$K=39,098 g/mol$

Also, we need to remember that 1 mol of a compound or element is equal to $6,022x10^{23}$ of that compound.

From the statement, we are asked to calculate how many atoms of K are present in 195,49 of K.

So, doing the calculations, we have:

$195,49g*\frac{1mol}{39,08}*\frac{6,022x10^{23} atoms}{1 mol K} =3,0110x10^{24} \\$

So, we have $3.0110x10^{24}$ atoms of K in 195,49 grams of K.

Have a nice day!

3 0

3 years ago

Can someone help me with Q4 MCQ? I would like to have an explanation pls. Thanks, will mark brainliest.

lilavasa [31]

Answer:

B

Explanation:

The ratios of the coefficient of the compounds in a balanced chemical equation tells us the relationship of each compound to the others in terms of mole.

Based on the equation,

3 moles of CO₂ would require 2 moles of phosphoric acid.

3 mol CO₂ ------- 2 mol H₃PO₄

1.5 mol CO₂ ------- 2 ÷2= 1 mol H₃PO₄

Or 1.5 mol would require $\frac{1.5}{3} \times 2$ mol of H₃PO₄

To find mass of H₃PO₄, multiply the number of moles by its Mr, which can be deduced with the help of the periodic table.

Ar of H₃PO₄

= 3(Ar of H) + Ar of P +4(Ar of O)

= 3(1) +31 +4(16)

= 98

Multiply 98 with the number of moles, 1, to obtain the answer.

So if you would look at the steps above, here's what we did:

$\frac{1.5 \times 2}{3} \times 98 \\ = \frac{1.5 \times 2 \times 98}{3}$

8 0

3 years ago

What is the molecular formula of a compound that has a molecular mass of 54 and the empirical formula is C2H3

iren [92.7K]

To find the molecular formula from the empirical formula, you need to find a multiple (x) that will give you the molar mass of the compound which in the question is 54 g/mol.

If C₂H₃ is the empirical formula
molar mass of empirical formula = (12 × 2) + (1 × 3) g/mol
= 27 g/mol
let x = multiple
let molecular formula = C₂ₓ H₃ₓ

multiple = molecular mass ÷ empirical mass
= 54 g/mol ÷ 27 g/mol
= 2

If molecular formula = C₂ₓ H₃ₓ

then molecular formula = C₂₍₂₎H₃₍₂₎

= <span>C₄H</span>₆

8 0

3 years ago