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3 years ago

Examine the statement. An atom has eight protons. What would need to happen for the atom to have an overall charge of +2?

2 answers:

8 0

An atom has eight protons.
Since each proton has a charge of +1, the whole atom
so far has a charge of +8 .

If we want an overall charge of only +2, we need to cancel
or neutralize 6 of those positive charges somehow.
We have two choices:

==> rip off 6 protons and throw them away

Well, the protons are in the nucleus. It's almost impossible to
rip particles out of a nucleus, and if you manage to do it, you
end up with a completely different substance. So the first choice
doesn't seem like the way to go. Let's look at the second one.

==> glue something onto the atom that has 6 negative charges
NOW we're getting somewhere !
ELECTRONS have negative charges ... 1 apiece.
Electrons are everywhere, they're easy to get, and easy to
work with. We could go on Amazon and order 6 electrons,
we could have them by tomorrow, and GET THIS: Opposite
charges attract each other anyway, so if we bring the electrons
anywhere near the 8 protons, they'll snap in and get glued on
automatically. THIS is the way to change our atom to +2 ...
with some electrons.

fiasKO [112]3 years ago

8 0

Answer:

The atom would have to lose two electrons.

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The rotational inertia of a thin rod about one end is 1/3 ML2. What is the rotational inertia of the same rod about a point loca

zlopas [31]

Answer:

The value is $I = 0.0932 ML ^2$

Explanation:

From the question we are told that

The rotational inertia about one end is $I_R = \frac{1}{3} ML^2$

The location of the axis of rotation considered is $d = 0.4 L$

Generally the mass of the portion of the rod from the axis of rotation considered to the end of the rod is $0.4 M$

Generally the length of the rod from the its beginning to the axis of rotation consider is

$k = 1 - 0.4 L = 0.6L$

Generally the mass of the portion of the rod from the its beginning to the axis of rotation consider is

$m = 1- 0.4 M = 0.6 M$

Generally the rotational inertia about the axis of rotation consider for the first portion of the rod is

$I_{R1} = \frac{1}{3} (0.6 M )(0.6L)^2$

$I_{R1} = \frac{1}{3} (0.6 M )L^2 0.6^2$

Generally the rotational inertia about the axis of rotation consider for the second portion of the rod is

$I_{R2} = \frac{1}{3} (0.6 M )(0.6L)^2$

=> $I_{R2} = \frac{1}{3} (0.4 M )(0.4L)^2$

=> $I_{R2} = \frac{1}{3} (0.4 M )L^2 0.4^2$

Generally by the principle of superposition that rotational inertia of the rod at the considered axis of rotation is

$I = \frac{1}{3} (0.6 M )L^2 0.6^2 + \frac{1}{3} (0.4 M )L^2 0.4^2$

=> $I = \frac{1}{3} ML ^2 [0.6 * (0.6)^2 + 0.4 * (0.4)^2 ]$

=> $I = 0.0932 ML ^2$

8 0

3 years ago

The place you get your hair cut has two nearly parallel mirrors 6.5 m apart. As you sit in the chair, your head is

Ghella [55]

Complete question is;

The place you get your hair cut has two nearly parallel mirrors 6.50 m apart. As you sit in the chair, your head is 3.00 m from the nearer mirror. Looking toward this mirror, you first see your face and then, farther away, the back of your head. (The mirrors need to be slightly nonparallel for you to be able to see the back of your head, but you can treat them as parallel in this problem.) How far away does the back of your head appear to be?

Answer:

13 m

Explanation:

We are given;

Distance between two nearly parallel mirrors; d = 6.5 m

Distance between the face and the nearer mirror; x = 3 m

Thus, the distance between the back-head and the mirror = 6.5 - 3 = 3.5m

Now, From the given values above and using the law of reflection, we can find the distance of the first reflection of the back of the head of the person in the rear mirror.

Thus;

Distance of the first reflection of the back of the head in the rear mirror from the object head is;

y' = 2y

y' = 2 × 3.5

y' = 7

The total distance of this image from the front mirror would be calculated as;

z = y' + x

z = 7 + 3

z = 10

Finally, the second reflection of this image will be 10 meters inside in the front mirror.

Thus, the total distance of the image of the back of the head in the front mirror from the person will be:

T.D = x + z

T.D = 3 + 10

T.D = 13m

8 0

3 years ago

Which material will heat up the most quickly if placed near a heat source?

Thepotemich [5.8K]

Answer:

Metal

Explanation:

Just answered on Apex

7 0

3 years ago

Read 2 more answers

(100 POINTS!!!!!) What type of solar radiation does not reach the surface of the Earth?

Kobotan [32]

Gamma radiations do not reach the surface of the Earth

Explanation:

Sun radiates all of these radiations but one of them does not reach the surface of the Earth. Most of the radiation switch reaching the Earth's surface are visible and infrared radiations.

8 0

3 years ago

True or false: humans have to find a balance with their environment, using sparingly so we don’t run out of them

Harlamova29_29 [7]

Answer:

False

Explanation:

in my point of view the human race has adapted to being greedy in some ways we can save resources but its very rare

hope this helps! : )

6 0

2 years ago