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3 years ago

Can y’all help me pleaseeee

Physics

2 answers:

mart [117]3 years ago

8 0

it would still be 5

Pie3 years ago

3 0

The answer is five, hope you have a good one!

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The answer to the question: "the number of times the sun will rise in two years " will be measured in _____.

Murrr4er [49]

I think the answer is Ten. Hope i helped

just asking do you do K-12

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3 years ago

Give an example of a measurement that is precise to the nearest tenth of a gram.

Svet_ta [14]

Answer:

So we have a measure in grams, we can start with something like:

143.523 grams.

Now we want this measurement to be precise to the nearest tenth of a gram.

The nearest tenth of a gram is the first digit after the decimal point, then the digits that come after this are not useful, because they are outside our precision range.

Then we must write our measurement as:

143.5 grams

Where the digit that came after the 5 was a 2, so we rounded down.

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3 years ago

What is the lewis dot structure of Na+

SpyIntel [72]

The dots in the Lewis dot structure symbolize an atom's elements.
Since Na^+ is a positive ion (cation) with a charge of +1, it indicates that it has lost an electron. 
Since Na had one electron, to begin with, and it is now lost, Na^+ will have no dots. However, the charge must still be written as a superscript. 
Therefore, the Lewis dot structure for Na^+ is just Na^[+]

5 0

3 years ago

At time t=0 a proton is a distance of 0.360 m from a very large insulating sheet of charge and is moving parallel to the sheet w

Yuki888 [10]

Explanation:

Formula for the electric field due to the infinite sheet of charge is as follows.

E = $\frac{\sigma}{2 \epsilon_{o}}$

where, $\sigma$ = surface charge density

Now, formula for electric force acting on the proton is as follows.

F = eE

where, e = charge of the proton

According to the Newton's second law of motion, the net force acting on the proton is as follows.

F = ma

a = $\frac{eE}{m}$

= $\frac{e(\frac{\sigma}{2 \epsilon_{o}})}{m}$

= $\frac{e \sigma}{2m \epsilon_{o}}$

According to the kinematic equation, speed of the proton in perpendicular direction is as follows.

$v_{f} = v_{i} + at$

= $(0 m/s) + \frac{e \sigma}{2 m \epsilon_{o}}t$

= $\frac{1.6 \times 10^{-19}C \times 2.34 \times 10^{-9} C/m^{2} \times 5.40 \times 10^{-8}s}{2 \times (1.67 \times 10^{-27} kg)(8.85 \times 10^{-12} C^{2}/Nm^{2}}$