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nalin [4]
3 years ago
10

Why is having a scientific model of the atom important? (2 points)

Physics
1 answer:
Katena32 [7]3 years ago
5 0

Answer:

Option D is the correct answer: The model allows us to predict how atoms will behave in certain situations.

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What is the magnitude (in N/C) and direction of an electric field that exerts a 4.00 x 10^−5 N upward force on a −2.00 µC charge
emmasim [6.3K]

Answer:

The magnitude of electric field is 1.25\times10^{14}\ N/C in downward.

Explanation:

Given that,

Force F= 4.00\times10^{-5}\ N

Charge q= -2.00 μC

We know that,

Charge is negative, then the electric field in the opposite direction of the exerted force.

We need to calculate the magnitude of electric field

Using formula of electric force

F = qE

E = \dfrac{F}{q}

E=\dfrac{4.00\times10^{-5}}{-2.00\times1.6\times10^{-19}}

E=-1.25\times10^{14}\ N/C

Negative sign shows the opposite direction of electric force.

Hence, The magnitude of electric field is 1.25\times10^{14}\ N/C in downward.

8 0
4 years ago
Elaborate on the suitability of "cola" type drinks to polish chrome surfaces.
nexus9112 [7]
The answer is t<span>he phosphoric acid in cola easily removes dirt and grime.   The </span>"cola" type drinks is suitable to polish chrome surfaces. Cola contains a very diluted solution of phosphoric acid, which can  remove rust, dirt, and grime from chrome surface. 
3 0
4 years ago
Explain what differentiates the Earth’s crust and lithosphere.
Allisa [31]

Answer:

What is the difference between the crust and lithosphere? The crust (whether continental or oceanic) is the thin layer of distinctive chemical composition overlying the ultramafic upper mantle. ... The lithosphere is the rigid outer layer of the Earth required by plate tectonic theory.

Explanation:

Hope this helps!

4 0
3 years ago
Read 2 more answers
PE=30J, m=?, g=10m/s2, h=10m
OleMash [197]
Based on the given, this is probably a gravitational potential energy problem (PEgrav). The formula for PEgrav is:

PEgrav = mgh

Where:
m = mass (kg)
g = acceleration due to gravity
h = height (m)

With this formula you can derive the formula for your unknown, which is mass. First put in what you know and then solve for what you do not know.

PEgrav=mgh
30J=m(10)(10[tex] \frac{30}{100} =m)[/tex]

Do operations that you can with what is given first.

30J=m(100m)

Transpose the 100 to the other side of the equation. Do not forget that when you transpose, you do the opposite operation.

\frac{30}{100} =m

m = 0.30kg

5 0
3 years ago
Which feature forms most of the ocean floor. describe it in detail
worty [1.4K]
Where plates are pulled away (diverge) from each other molten magma flows upward between the plates forming mid-ocean<span> ridges, underwater volcanoes, hydrothermal vents, and new </span>ocean floor<span> crust. The Mid-Atlantic Ridge, is an example of this type of plate boundary.</span>
3 0
3 years ago
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