3 years ago

How are rocks formations formed in Hawaii?

Physics

1 answer:

seropon [69]3 years ago

7 0

Answer:mostly likely from volcanos

Explanation:

when the volcano erupts the magma becomes lava and cools making igneous rocks

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What is the maximum value that an eccentricity can be? What shape would this be?

Wittaler [7]

1.000. An ellipse with an eccentricity of 0 is a circle.

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3 years ago

An earthquake P wave traveling at 7.7km/s strikes a boundary within the Earth between two kinds of material.If it approaches the

Aloiza [94]

Answer:

$c_2 = 6.04\ Km/s$

Explanation:

given,

speed of wave, c₁ = 7.7 m/s

angle of incidence, i = 44°

angle of refraction, r = 33°

speed of wave in second medium.

using Snell's law

n₁ sin i = n₂ sin r

$\dfrac{n_1}{n_2}=\dfrac{sin\ r}{sin\ i}$

$\dfrac{n_1}{n_2}=\dfrac{sin\ 33^0}{sin\ 44^0}$

$\dfrac{n_1}{n_2}=0.784$

now,

calculation of velocity in the medium

n₁ c₁ = n₂ c₂

$\dfrac{n_1}{n_2}=\dfrac{c_2}{c_1}$

$c_2 = c_1\times \dfrac{n_1}{n_2}$

$c_2 = 7.7\times 0.784$

$c_2 = 6.04\ Km/s$

Speed of wave in the second medium is equal to 6.04 Km/h

6 0

3 years ago

A 65 kg students is walking on a slackline, a length of webbing stretched between two trees. the line stretches and sags so that

polet [3.4K]

Answer : Tension in the line = 936.7 N

Explanation :

It is given that,

Mass of student, m = 65 kg

The angle between slackline and horizontal, $\theta=20^0$

The two forces that acts are :

(i) Tension

(ii) Weight

So, from the figure it is clear that :

$mg=2T\ sin\ \theta$

$T=\dfrac{mg}{2\ sin\theta}$

$T=\dfrac{65\ kg\times 9.8\ m/s^2}{2(sin\ 20)}$

$T=936.7\ N$

Hence, this is the required solution.

5 0

3 years ago

Read 2 more answers

A person is standing outdoors in the shade where the temperature is 17 °C. (a) What is the radiant energy absorbed per second by

Inessa05 [86]

Answer:

a) 4.9W b) 3.82W

Explanation:

Stefan-Boltzmann law of radiation formulae:

Q/t (W) = sigma* e*A*T^4

Sigma = 5.67*10^-8 j/sm^2K^4 (Stefano Boltzmann constant)

e = emissivity

T = absolute temperature in kelvin and A = area in m^2

a) Q/t = 140/10000(m^2) * 0.87* 5.67* 10^-8* (290^4) = 4.9W

b) without hair the

Q/t = 140/ 10000(m^2) *0.68* 5.67* 10^-8* (290^4)

= 3.82W

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4 years ago

What is the most effective means of establishing awareness of hazards in commercial, industrial, and storage facilities with lar

coldgirl [10]

Answer:

C: Contacting the facilities.

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3 years ago