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Aloiza [94]
3 years ago
13

Which answer explains why plate B is moving underneath plate A

Physics
1 answer:
blsea [12.9K]3 years ago
4 0

Answer:

A.

Explanation:

Earth is composed of different layers and one layer moves over another due to differences in the densities.

According to the physics of density, a substance having less density floats over a higher density substance. The oceanic crust has more density than the continental crust that is why continental crust float over oceanic crust.

So in the given example, plate B is moving below the plate A, it means plate B is more dense than plate A because plate B is composed of oceanic crust . <u>For example : continents float over the asthenosphere (a layer below the lithosphere).</u>

Hence, the correct answer is "A ".

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Which of the following statements about inertia is true?
Ulleksa [173]

Answer:

D. The inertia of a spaceship on Earth equals the inertia of the spaceship on the moon.

Explanation:

Inertia is the property of mass and it will directly depends on the value of mass of the object

So here inertia of object will change as the mass of the object will change

So here we can say

A. Inertia depends on velocity.

FALSE

As inertia is not a function of velocity

B. Inertia is a measurement of acceleration.

FALSE

it does not depends on acceleration

C. The inertia of a 2 kg bag of flour is greater than the inertia of a 4 kg flower pot.

FALSE

More mass means more inertia so 4 kg must have more inertia

D. The inertia of a spaceship on Earth equals the inertia of the spaceship on the moon.

TRUE

Since mass on Earth and Moon will be same so inertia must be same

4 0
3 years ago
Which of the following numbers is equal to an object's acceleration?
Elenna [48]
<span>C. the slope of that objects velocity-time graph

Hope it helps!
</span>
5 0
3 years ago
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A spring has a constant k= 10.32 N/m and is hung vertically. A 0.400kg mass is suspended from the spring. What is the displaceme
alukav5142 [94]

Answer:

displacement (x) = 0.003798 meters

Explanation:

from the fact that the string is hung vertically we can deduce that:

Total force acting on the mass = Fs (by spring) + Fg (by gravity)

<em>where</em>

Fs = k*x , x is the displacement..

Fg = m*g

then:

Ftot = m*a, <em>but a = 0 m/(s^2) because the mass becames stationary.</em>

Ftot = 0

Fs + Fg = 0

<em>by direction, take down as negative.</em>

Fs - Fg = 0

k*x = m*g

x = m*g/k = [(0.400)(9.8)]/(10.32)

  = 0.3798 meters

4 0
3 years ago
What is the average reaction time of people
Yanka [14]

Answer:

the average reaction time is 0.25 seconds.

6 0
3 years ago
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An iron wire has length 8.0m and a diameter 0.50mm. The sir has a resistance R.
Rudik [331]
The re<span>sistance of the second wire is 16 R.
where R is the resistance of the first wire.

R = </span>ρ\frac{l}{A}
where l = length of the wire
A = area of the wire
A = \pi r^{2} where, r = \frac{diameter of wire}{2}

Thus, on finding the ratio of resistance of the two wires, we get,

\frac{R1}{R2} =  \frac{l1A2}{l2A1}

here, R1 = R
l1 = 8m
l2 = 2m
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A1=π0.50^{2}

we get. R2 = 16R
7 0
4 years ago
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