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timama [110]
2 years ago
14

Olivia is on a swing at the playground.

Physics
1 answer:
maks197457 [2]2 years ago
7 0

Olivia is on a swing at the playground. The kinetic energy is increasing and her potential energy decreasing at point X.

<h3>What is kinetic energy and potential energy?</h3>

The kinetic energy of an object is the ability to do work by virtue of its motion and potential energy is the ability to do work by virtue of its position.

At point W and Z, Olivia is at the maximum displacement from the mean position, where kinetic energy is zero and potential energy is maximum.

At point Y, it is approaching to increase its potential energy and decreasing kinetic energy. Opposite to this, at point X, kinetic energy is increasing and potential energy is decreasing.

Thus, the kinetic energy is increasing and her potential energy decreasing at point X.

Learn more about  kinetic energy and potential energy.

brainly.com/question/15764612

#SPJ1

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In ‘static equilibrium' the force pushing out against the inward pull of gravity is
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If you are referring to stars, the answer would then be pressure from the nuclear reactions 

The thermal pressure that pushes outward and against the pull of gravity in a star is caused by the nuclear reactions that is happening within the stars core. A lot of energy is released during these reactions which produce thermal pressure. The pressure then pushes outward.
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2 years ago
Green light has higher refractive index than orange light for the same material medium.explain​
Alona [7]

Answer:

The index of refraction varies with frequency or color. Frequency does not change as light travels from one medium to another.

Explanation:

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Katie rolls a toy car off the end of a table.
harkovskaia [24]

Answer:

The toy car will fall off Katie's hands and onto the ground .

Explanation:

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7 0
1 year ago
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An engineer has designed the foundation for column system (20 columns) of a 5 story residential building. Preliminary excavation
nevsk [136]

Answer:

Boring depth = 6.76m

Explanation:

Given Data:

No. of columns = 30

No. of storeys = 5

Water level =3.5m below ground level

Axial load = 2500kN

Foundation size = 3mx2m

Depth of footing = 1.5m = Df

Solution:

First we need to calculate estimated net stress on footing

As we know that: q₀ = P/A

By putting values we get

q₀ = 2500/(3*2) = 416.677 kN/m³

Now for the depth of bedrock from the bottom surface of footing,

D₃ = total depth of bedrock - Df = 100 -1.5 = 98.5m

Now for the calculation of D1, here D1 is the distance from bottom surface of footing to depth where change in vertical stress = Δσ¹ = (1/10)q₀ ---------equation (1)

Now, second diagram attached below is drawn according to stress distribution of 2V:1H

Δσ¹ = P/A¹ = (2500)/(3+z)(2+z) ---------equation (2)

From equation 1 and 2 we get

0.1*416.677 = 2500/(3+D1)(2+D1)

D1²+5D1 = 54

D1 = 5.2621 m

Now we will calculate D2 where we have Δσ¹ /σ₀¹ = 0.05

Now,

we will check this ratio for bottom most layer first(i.e. clay layer, ρsat=16.9kN/m³), if it is satisfied then O.K other wise we will continue procedure for top layers.

We have, Δσ¹ = σ₀¹(0.05)

First we need to find vertical stress σ₀¹ at depth z

σ₀¹ = (3.5*17) + 1.5*(ρsat-ρw)sand + (ρsat-ρw)clay*(D2-3.5)

By putting values we get

σ₀¹ = 59.5 + 13.035 _ 7.09D2 - 28.815

Putting it in equation 2 , we get

σ₀¹ = 2500/(3+D2)(2+D2) = 0.05 * (7.09D2 + 47.72)

By simplification, we get

7.09D₂³+83.167D₂²282.147D₂-49714 = 0

D₂ = 15.35 m

So from this calculation it is evident that Δσ¹ /σ₀¹ = 0.05 is at depth of 15.35m which is in clay layer, so no need to check in upper layers.

Now, for the calculation of boring depth depth,

Boring depth = D +Df

1st case = 5.26 + 1.5 = 6.76m

2nd case = 15.35 + 1.5 = 16.85m

13rd case = 98.5 + 1.5 = 100m

Boring depth = 6.76m

3 0
3 years ago
What is an atomic nucleus?
Pavel [41]
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Hope this answers it.

Brady
4 0
3 years ago
Read 2 more answers
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