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lora16 [44]
3 years ago
10

Can someone help me on #18 - #26? At least one ☝️ I really need help!!!

Physics
1 answer:
Novosadov [1.4K]3 years ago
3 0
#18). (I think.  It's the one that starts with "Compare..."
Gravity ALWAYS attracts.
The force between electric charges can attract or repel ...
it depends whether the charges are the same kind or opposite kinds.

#19).
With both gravity and electric charges, the force between them quickly
becomes weaker when the distance between them increases.

#20).
I don't think it changes. 
If the doorknob gets charged by something that TOUCHES it, so that
charges can flow into it from the other object or out of it, then the total
amount of electric charge on it might change.  But the question says
that the doorknob is charged by an "electric field", so nothing touched it,
and charges couldn't flow into it or out of it.  The only way it got charged
was by the charges it already had in it getting moved around ... electrons
in one part of the knob moving over to the other side.  Then it would act
as if it was charged ... if you touched it, you might get zapped.

#21).,  #22).,  #23).
You're supposed to draw a graph to answer these.
It's a very easy graph to draw, and you should do it.
Label the x-axis 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12.
Label the y-axis 0.1, 0.2, 0.3, 0.4, 0.5, 0.6, 0.7, 0.8, 0.9, 1.0, 1.1, 1.2 .
Put the four points on the graph ... A, B, C, and D.
For each point, the 'battery voltage' is the number on the x-axis
   and the 'Current' is the number on the y-axis.
Then draw a line through the points.
When you have the graph to look at, you can easily answer 21, 22, and 23.

24).  I'm not sure, and I don't want to guess.

25).  Did you ever move a coil of wire near a magnet in class ?
This is the same situation, only the magnet is moving and the wire is still.
The result will be the same.

26).  Magnets have two poles that attract
the opposite kind and repel.
Now you copy the map and fill in the other side.

This is a lot of work for 5 points, so I left some parts for you to do.
Another reason I did that is:  You'll learn a lot more that way.
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hope this helps you

3 0
3 years ago
The two spheres pictured above have equal densities and are subject only to their mutual gravitational attraction. Which of the
kiruha [24]

Answer:

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Explanation:

If two spheres have equal densities and they are subject only to their mutual gravitational attraction. We need to say that the quantities that must have the same magnitude for both spheres. So, the correct option is (E) i.e. gravitational force.

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8 0
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Explain how soilds non metals are different from solid metals
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Sail boats utilize energy from the wind. Wind energy is a form of
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For safety reasons, a worker’s eye travel time in a certain operation must be separated from the manual elements that follow. Th
iogann1982 [59]

Answer:

The answer is 12.67 TMU

Explanation:

Recall that,

worker’s eyes travel  distance must be = 20 in.

The perpendicular distance from her eyes to the line of travel is =24 in

What is the MTM-1 normal time in TMUs that should be allowed for the eye travel element = ?

Now,

We solve for the given problem.

Eye travel is = 15.2 * T/D

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Therefore, the MTM -1 of normal time that should be allowed for the eye  travel element is = 12.67 TMU

7 0
3 years ago
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