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matrenka [14]
2 years ago
13

Select all the correct answers.

Physics
1 answer:
faltersainse [42]2 years ago
4 0

Answer:

so therefore, the comb gains electron and the hair losses electrons

Explanation:

It is known that electron contain a negative charge.

So, when an atom gain electrons then number of electrons within the atom increases. As a result, the atom acquires a negative charge.

But when an atom loses electrons, there will be deficiency of electrons within the atom. As a result, the atom becomes positively charged.

Hence,, when people use plastic combs on their hair, the combs become negatively charged. The situation which is true about this is the comb gains electrons and the hair loses electrons.

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How is oceanic crust different from continental crust? How are they the same?
marissa [1.9K]

Answer:

Explained

Explanation:

The Oceanic crust mainly consists of a rock called basalt. This rock is made up of silicon, magnesium and oxygen. Whereas the continental crust is mainly made of ignious rocks.

The density of oceanic crust is about 3.0 gm/cm^3, which is higher than the continental crust.The oceanic crust undergoes a peculiar phenomenon where in the complete oceanic crust is transformed where is phenomenon is very are on the surface.

The thickness of continental crust varies from 3 to 6 miles whereas for oceanic crust it thinner comparatively.

6 0
3 years ago
Juan's weight is twice the weight of his little sister Anna. They climb the same set of stairs and find they have the same power
mamaluj [8]

Answer:

We can define power as:

P = W/t

where W is work, and t is time.

And the work needed to climb a distance (we can assume that climb a set of stairs is equivalent to climbing a given height) is:

W = g*h*m

Where:

g = gravitational acceleration

h = height climbed

m = mass.

g and h are the same for Juan and his sister, and the only thing that changes is the mass

The work for Juan is:

Wj = g*h*M

And for his sister, that has half his

Wa = g*h*M/2.

Then the power for Juan, is:

Pj = Wj/t1 = (g*h*M)/t1

Where t1 is the time that Juan needs to climb the stairs.

And for Anna is:

Pa = Wa/t2 = (g*h*M/2)/t2

Where t2 is the time that Anna needs to climb the stairs:

We know that they have the same power, then:

Pj = Pa

(g*h*M)/t1 = (g*h*M/2)/t2

M/t1 = M/2*t2

t1 = 2*t2

This means that the time in which Juan climbs the stairs is twice the time that Anna needs to climb the stairs.

5 0
3 years ago
The drawing shows a wire composed of three segments, AB, BC, and CD. There is a current of I = 2.0 A in the wire. There is also
alexdok [17]

Answer:

The magnitude of the magnetic force acting on the wire is zero, because the magnetic field is parallel to the wire.

In fact, the magnetic force exerted by the magnetic field on the wire is

where I is the current in the wire, L the length of the wire, B the magnetic field intensity and  the angle between the direction of B and the wire. In our problem, B and the wire are parallel, so the angle is  and so , therefore the magnetic force is zero: F=0.

7 0
3 years ago
a particle of mass2.5kg moves in a cnservative force field.its potential energy curveis dhwn below.from the curve,detrmine(a)the
Serhud [2]
Nothing can be determined from the curve without seeing the curve.
5 0
4 years ago
How does the mass of jupiter compare to the rest of the planets in the solar system?
katen-ka-za [31]
It is the most massive planet in the solar system.
3 0
3 years ago
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