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solong [7]
2 years ago
11

A rubber duck of volume 2,500cm3 floats in water with 20% of its volume submerged. You want to hold the duck under water so it i

s at rest and completely submerged. How much force do you have to apply? If you release the duck, what will be its acceleration at that instant?
Physics
1 answer:
daser333 [38]2 years ago
4 0

Answer:\d

Explanation:

its d

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Around which months does el nino end and la nina start?
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They both tend to develop during the spring (March-June), reach peak intensity during the late autumn or winter (November-February), and then weaken during the spring or early summer (March-June)

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Which two of the following actions would
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Answer is d using a heavier string
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The relationship among mass force and acceleration is explained by
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Newton's second law of motion. F = m a .
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Suppose the charged sphere is made from a conductor, rather than an insulator. Do you expect the magnitude of the force between
meriva

Answer:

* Point charge outside the radius of the sphere r> R, the force in the two systems is the same

* Point charge inside the sphere  r <R,  therefore the force in the system with the insulating sphere is greater

Explanation:

To answer this question let's use the relation

          F = q E

with q being the point charge and E the electric field created by the sphere.

If we use Gauss's law

The electric field flux is proportional to the wax charge within the surface.

Let's analyze our situation.

* Point charge outside the radius of the sphere

          r> R

where R is the radius of the sphere and r the distance from the center of the sphere to the point charge

in this case the waxed charge for the insulating and conducting sphere is the same, therefore the force in the two systems is the same

* Point charge inside the sphere

           r <R

conductive sphere.

     As the charges are mobile, they are located on the surface of the sphere and there is no waxed charge within a Gaussian surface that passes through the point charge, therefore the electric field is zero and consequently the force

             F = 0

insulating sphere

      Charges cannot move therefore there is a fraction of charge within a surface that passes through the point charge, consequently the electric field is different from zero

            Fe> 0

for this second position the force on the conducting sphere is zero

therefore the force in the system with the insulating sphere is greater

4 0
2 years ago
A roofer drops a nail that hits the ground traveling at 26 m/s. How fast was the nail traveling 1 second before it hits the grou
RoseWind [281]

vf = vi + at 

vf – vi = at<span>

<span>vi= 0, vf=26  and afor nil = 9.8m/s2</span></span>

26 = 9.8t

t =<span> 26 / 9.8 = 2.65 s
Now we know the total time, so we can calculate the time 1 second before it hit the ground. 

<span>= 2.65 -1 = 1.65s

<span>Now again using the same equation, vf = vi+at, we can find vf
vi = 0, a = 9.8 t=1.65</span></span></span>

vf = 0 + 9.8(1.65) = 16.17 m/s<span>
</span><span>So, the nail is traveling with the speed of 16.17m/s 1 second before it hits the ground.</span>

6 0
3 years ago
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