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Alekssandra [29.7K]
3 years ago
9

A girl running around a circular track of radius 200 m completes one

Physics
1 answer:
kondor19780726 [428]3 years ago
4 0

Answer:

v = 2 m/s

Explanation:

First, we find the angular velocity of the girl by using the following formula:

Angular\ Velocity =\omega= \frac{Angular\ Distance\ Covered}{Time\ Taken}\\\\\omega = \frac{1\ revolution}{10\ min}\frac{1\ min}{60\ s}\frac{2\pi\ rad}{1\ revolution}\\\\\omega = 0.01\ rad/s

Now, for the average velocity of the girl we can use the following formula:

Average\ Velocity = V = r\omega\\V = (200\ m)(0.01\ rad/s)\\

where,

r = radius = 200 m

therefore,

<u>v = 2 m/s</u>

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Answer:

The correct answer is - A matter that has an ordered arrangement of atoms, molecules, or ions.

Explanation:

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It can be cubic, hexagonal, triclinic, monoclinic, orthorhombic, tetragonal, and trigonal that are ordered arrangments. Its internal symmetry is visible to its surface.

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The 'formulas' to use are just the definitions of 'power' and 'work':

Power = (work done) / (time to do the work)

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Combine these into one. Take the definition of 'Work', and write it in place of 'work' in the definition of power.

Power = (force x distance) / (time)

From the sheet, we know the power, the distance, and the time.  So we can use this one formula to find the force.

Power = (force x distance) / (time)

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We have that the electric field at the center of the metal ball due only to the charges on the surface of the metal ball is

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From the question we are told that

A solid metal ball of radius 1.5 cm

bearing a charge of -15 nC is located near a hollow plastic ball of radius 1.9 cm bearing

uniformly distributed charge of -7 nC

The distance between the centers of the balls is 9 cm

Generally the equation for the electric field  is mathematically given as

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For more information on this visit

brainly.com/question/21811998

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