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Fudgin [204]
3 years ago
6

Suppose you wanted to "pull an Einstein," and create a static universe  in which the gravitational attraction of matter is exac

tly balanced by the gravitational repulsion of dark energy with equation-of-state parameter − 1/ 3 < wq < − 1 and energy density εq.
What is the necessary matter density (εm) required to produce a static universe, expressed in terms of εq and wq?


Will the curvature of this static universe be negative or positive?


What will be its radius of curvature, expressed in terms of εq and wq?

Physics
2 answers:
Stolb23 [73]3 years ago
8 0

Answer:

The curvature of this static universe is positive.

Explanation: Please find the attached files for the solution and answers

weeeeeb [17]3 years ago
6 0

Answer:

Find the solution attached

Explanation:

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If you pull a resistant puppy with its leash in a horizontal direction, it takes 80 N to get it going. You can then keep it movi
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Answer:

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F_s = \mu_s*N

Where F_s is the static friction force, \mu_s is the coefficient of static friction and N is the normal force. Since there's no angle on the flor the normal force is equal to the weight of the puppy, therefore, N = 110\text{ N}, to make the puppy moving we need to use a force of 80 N, therefore, F_s = 80 \text{ N}, so we can solve for the coefficient as shown below:

80 = \mu_s*110\\\mu_s = \frac{80}{110} = 0.7273\\

The coefficient of static friction between the puppy and the floor is 0.7273.

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