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3 years ago

If the mass of a material is 115 grams and the volume of the material is 16 cm3, what would the density of the material be?

1 answer:

hjlf3 years ago

6 0

Well, density is mass/volume. So what's 115 g / 16 cm3? That'll get you your density. Remember that density will be in g/cm3!

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Two like-charged particles are placed close to each other. How would the force of repulsion be affected if the charge on one of

astra-53 [7]

Answer: It will remain the same

Explanation:

According to <u>Coulomb's Law:</u>

<em>"The electrostatic force $F_{E}$ between two point charges $q_{1}$ and $q_{2}$ is proportional to the product of the charges and inversely proportional to the square of the distance $d$ that separates them, and has the direction of the line that joins them". </em>

<em />

Mathematically this law is written as:

$F_{E}=K\frac{q_{1}.q_{2}}{d^{2}}$ (1)

Where:

$F_{E}$ is the electrostatic force

$K$ is the Coulomb's constant

$q_{1}=q_{2}=q$ are the electric charges , which in this case have the same positive charge

$d$ is the separation distance between the charges

Rewritting we have:

$F_{E}=K\frac{q^{2}}{d^{2}}$ (2)

Now, if the first charge is doubled:

$q_{1}=2q_$

And the second is reduced to a half:

$q_{2}=\frac{1}{2}q$

We will have the following:

$F_{E}=K\frac{(2q)(\frac{1}{2}q)}{d^{2}}$ (3)

$F_{E}=K\frac{q^{2}}{d^{2}}$ (4)

As we can see equation (4) is equal to equation (2), this means the force of repulsion between both charges will remain the same

8 0

3 years ago

Read 2 more answers

Question

finlep [7]

Answer:

one for physical is that your muscles will seize up or cramp when you try to move. one for mental is that if your always sitting down you will most likely become stressed or get depression

Explanation

the reason your muscles cramp is from lack of exercise form sitting they get used to that position and want to stay that way. then theres the deprestion ive had it it aint fun nor is stress ive had that too

5 0

3 years ago

Four pairs of objects have the masses as described below, along with the distances between

lord [1]

Answer:

<h2>Mass of 1 Kg and 2 Kg, 1 meters apart.</h2>

Explanation:

The gravitational force is defined as

$F=G\frac{m_{1} m_{2} }{r^{2} }$

By definition, the gravitational force depends directly on the product of the masses and indirectly on the distance between the masses, which means the further they are, the less gravitational force would be. And, the greater the masses, the greater the gravitational force.

Among the options, the pair that would have the greatest gravitational force is Mass of 1 Kg and 2 Kg, with 1 meter between them.

Notice that the last choice includes the same masses but with a greater distance between them, that means it would be a weaker graviational force.

Therefore, the right answer is the second choice.

7 0

3 years ago

It is epistemically possible that a completed physics might include which of the following propositions? O Souls and other spiri

ohaa [14]

Answer:

option D.

Explanation:

The correct answer is option D.

At present the knowledge of physics does not includes the study related to souls , other spiritual substance.

Physics does not give the answers of question like God created universe , matter is unreal, etc.

So, there might will be possibility that in future complete physics will give the answer of all these questions i.e. correct answer is All of the above.

3 0

3 years ago

Can you please give me the answers ?

rodikova [14]

Answer:

237

Explanation:

7 0

3 years ago