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Oliga [24]
3 years ago
6

The earth rotates once per day about an axis passing through the north and south poles, an axis that is perpendicular to the pla

ne of the equator. assuming the earth is a sphere with a radius of 6.38 106 m, determine the speed and centripetal acceleration of a person situated at each of the following.
Physics
1 answer:
Rama09 [41]3 years ago
7 0
Please elaborate more on your question so I can help you
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A car is moving from rest and the velocity increases to 30 m/s in 4 seconds. Calculate its acceleration.
vaieri [72.5K]

Answer:

7.5 m/s²

Explanation:

Given:

v₀ = 0 m/s

v = 30 m/s

t = 4 s

Find: a

v = at + v₀

(30 m/s) = a (4 s) + (0 m/s)

a = 7.5 m/s²

8 0
3 years ago
A thin insulating rod is bent into a semicircular arc of radius a, and a total electric charge Q is distributed uniformly along
storchak [24]

Answer:

v = \frac{kQ}{a}  

Explanation:

We define the linear density of charge as:

\lambda = \frac{Q}{L}

     Where L is the rod's length, in this case the semicircle's length L = πr

The potential created at the center by an differential element of charge is:

dv = \frac{kdq}{r}

          where k is the coulomb's constant

                     r is the distance from dq to center of the circle

Thus.

v = \int_{}^{}\frac{kdq}{a}  

v = \frac{k}{a}\int_{}^{}dq

v = \frac{kQ}{a}     Potential at the center of the semicircle

4 0
3 years ago
describe the forces acting on a car as it movies along a level highway in still air at a constant speed
Travka [436]

Answers

The car's forward motion is opposed by the friction between the road and the tires and by the resistance of the air.

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How does energy change as it moves through the ecosystem?
Galina-37 [17]

Answer:

by the animeals and himens getting vood

Explanation:

3 0
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