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MA_775_DIABLO [31]
3 years ago
15

I need help with question one and question two

Physics
1 answer:
diamong [38]3 years ago
6 0
CH4(g) + 2 O2 (g)---> CO2(g) + 2 H2O (g)

2) PbCl2 (aq) + Na2CrO4 (aq) --> PbCrO4 (s) +  NaCl (aq)
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"Two electrons in an atom are separated by 1.4 × 10−10 m, the typical size of an atom. What is the force between them? The Coulo
Rudiy27

Answer:

F\approx 1.17551\times 10^{-8} N

Explanation:

In order to find the force between the two electrons, we need to use Coulomb's law. In its scalar form, the law is given by:

F=k_c \frac{q_1*q_2}{r^2}

Where:

k_c=Coulomb\hspace{3}constant\approx 9\times10^{9} \frac{Nm^2}{C^2} \\q_1\hspace{3}and\hspace{3}q_2=Magnitudes\hspace{3}of\hspace{3}the\hspace{3}charges\\r=Distance\hspace{3}between\hspace{3}the\hspace{3}charges

The electric charge of an electron is a known constant given by:

q_e \approx -1.6 \times 10^{-19} C

So:

q_1=q_2=q_e \approx -1.6 \times 10^{-19} C

Therefore, replacing the data provided in the Coulomb's law equation:

F=(9\times 10^{9})\frac{(-1.6\times 10^{-19})*(-1.6\times 10^{-19})}{(1.4\times 10^{-10})^2} =1.175510204\times10^{-8} \approx 1.17551\times10^{-8}N

8 0
3 years ago
What is Newton's Third law of motion? Explain how this roller coaster
Ivenika [448]

Answer:

Newton's third law of motion says, "For every action there is an equal and opposite reaction." So that applied to the student's roller coaster, between the marble and the track. When the marble went up and down the hill, it created different forces onto the track.

Explanation:

mark as brainiest

6 0
2 years ago
HELP ASAP!!!!!!!!!! WILL BE MARKED BRAINLIEST
lianna [129]

Answer:

Mass is how much "stuff" is in something. Weight is a force that is measured in Newtons. A pan balance is a type of scale. A measuring cup is used to measure volume, such as cups and grams (depending if you use the metric system or not).

Explanation:

Can you make me brainliest? TYSM Als,o srry if im wrong

6 0
3 years ago
I WOULD APPRECIATE HELP :)
Harlamova29_29 [7]

Answer:

Water vapor- least dense

liquid water- bonds

ice- most dense

Explanation:

I'm pretty sure lol

4 0
3 years ago
You volunteer for chalkboard cleaning duty and you get to work with the erasers. As you rub the dust off of the chalkboard, whit
Anna71 [15]

Answer:

A physical change

Explanation:

You are wiping chalk particles from the board to the eraser which is just changing the location of the chalk particles, a physical change.

you're not changing the chalk into a new substance or causing a chemical reaction, which would be a chemical change.

3 0
4 years ago
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