All categories

3 years ago

Which statement is true because of Newton's second law?

Physics

1 answer:

densk [106]3 years ago

5 0

Answer:

When the net force on an object decreases, the object's acceleration decreases 3rd option

Explanation:

You might be interested in

Which argument(s) for the increasing use of solar energy is/are valid? I. Solar cells are becoming cheaper and increasingly more

Tanya [424]

Answer:

The correct one is (III)

Explanation: Limited and uncertain supply and the increasing requirements for pollution control are raising the cost of using fossil fuels.

This is because fossil fuels emit green house gases that are causing global warming. As a result more awareness have been drawn towards the harmful use of fossil fuels, and international bodies are starting to form regulations on the use of fossil fuels. These above reasons has made fossil fuels though abundant, very expensive to use.

This make the usage of greener sources of energy like solar energy desirable. The only challenge solar is facing is on the area of efficiency, but scientists are constantly researching to make it more efficient.

5 0

3 years ago

Can someone please help me and i will give brainliest if i can.

noname [10]

Answer:

Because 1 change in one factor can effect the other and that one can effect the other and so on and so on.

So, let's just say water were to stop flowing, how would the oceans take that? How would precipitation take it?

7 0

3 years ago

What can be known about electrons?

BlackZzzverrR [31]

Electrons carry a negative charge.

8 0

3 years ago

Two particles with charges +6e and -6e are initially very far apart (effectively an infinite distance apart). They are then fixe

JulijaS [17]

Answer:

$\rm EPE_{final}-EPE_{initial}=-1.478\times 10^{-15}\ J.$

Explanation:

Given charges are:

$\rm q_1 = +6e.\\q_2 = -6e.$

The electric potential energy of a charge due to the electric field of another charge is given by

$\rm EPE=\dfrac{kq_1q_2}{r}.$

where,

k = Coulomb's constant, having value = $\rm 9\times 10^9\ Nm^2/C^2.$
r = distance between the charges.

When the charges are infinite distance apart, $\rm r = \infty$ ,

$\rm EPE_{initial} = \dfrac{kq_1q_2}{r}=0\ J.$

When the charges are $\rm 5.61\times 10^{-12}\ m$ apart, $\rm r=5.61\times 10^{-12}\ m$ ,

$\rm EPE_{final}=\dfrac{kq_1q_2}{r}\\=\dfrac{(9\times 10^9)\times (+6e)\times (-6e)}{5.61\times 10^{-12}}\\=-5.775\ e^2\times 10^{22}.$

Here, e is the charge on one electron, such that, $\rm e = -1.6\times 10^{-19}\ C$ .

Therefore,

$\rm EPE_{final}=-5.775\times (-1.6\times 10^{-19})^2\times 10^{22} = -1.478\times 10^{-15}\ J.$

Thus,

$\rm EPE_{final}-EPE_{initial}=-1.478\times 10^{-15}-0=-1.478\times 10^{-15}\ J.$

4 0

3 years ago

About how much of Earth's water is available for humans to use?

lesya692 [45]

Answer:

0.3 %

Explanation:

Earth cleans and replenishes the water supply through the hydrologic cycle. The earth has an abundance of water, but unfortunately, only a small percentage, is even usable by people.

5 0

3 years ago