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4 years ago

How do hydrothermal minerals form?

1 answer:

6 0

<span>Hydrothermal mineral deposit, any concentration of metallic minerals formed by the precipitation of solids from hot mineral-laden water. The solutions are thought to arise in most cases from the action of deeply circulating water heated by magma.</span>

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Which statement best explains some consequences of early sexual activity? Consequences to early sexual activity are not importan

Artemon [7]

I'd say a from opinion but its answer is d

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3 years ago

5. A 500 kg satellite is in a circular orbit at an altitude of 500 km above the Earth's surface. Because of air friction, the sa

nika2105 [10]

Answer:

the energy transformed into internal energy is E fr = 1.57*10¹⁰ J

Explanation:

From energy conservation , the internal energy gained by friction should be equal to the loss of total energy of the satellite

Since the total energy of the satellite can be decomposed into kinetic and potential energy

E fr = ΔE = E₂-E₁

E₁= K₁+V₁ = 1/2*m*v₁² + m*g*h₁

E₂ = K₂+V₂= 1/2*m*v₂² + m*g*h₂

first, we can choose our reference state so that h₂=0 and h₁=h=500 km

second , we can calculate the approximate the inicial velocity as the velocity required for a stable circular orbit

g = v₁²/(h+R) → v₁² = g*(h+R)

as the velocity diminishes, h diminishes, falling into the earth

assuming the radius of the Earth as R= 6371 km , then

v₁² = g*(h+R) = 9.8 m/s² * (500 km+ 6371 km) *1000 m/km = 6.73 * 10⁷ (m/s)²

replacing values

E₁ = 1/2*m*v₁² + m*g*h₁ = 1/2* 500kg *6.73 * 10⁷ (m/s)² + 500kg* 9.8m/s² * 500 km = 1.67*10¹⁰ J

E₂= 1/2*m*v₂² + m*g*h₂ = 1/2* 500kg *(2000 m/s)² + 0 = 1*10⁹ J

therefore

E fr = ΔE = E₂-E₁ = 1.67*10¹⁰ J - 1*10⁹ J = 1.57*10¹⁰ J

5 0

3 years ago

Gauss's law combines the electric field over a surface with the area of the surface. From Coulomb's law we know that the electri

Romashka-Z-Leto [24]

The change in surface area of Gaussian surface with radius (r) is 8πr.

<h3>Electric field from Coulomb's law</h3>

The electric field experienced by a charge is calculated as follows;

$E = \frac{Q}{4\pi \varepsilon_o r^2}$

where;

E is the electric field
Q is the charge
r is the radius

The electric field reduces by a factor of $\frac{1}{r^2}$

<h3>Surface area of a Gaussian surface;</h3>

The surface area of a sphere is given as;

$A = 4\pi r^2$

<h3>Change in area with r</h3>

$\frac{dA}{dr} = 8\pi r$

Thus, the change in surface area of Gaussian surface with radius (r) is 8πr.

Learn more about area of Gaussian surfaces here: brainly.com/question/17060446

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2 years ago

What is the difference between the specific heat of a substance and the total amount of heat of that substance ?

Dominik [7]

Explanation:

Specific heat of a substance is defined as the amount of heat that is required to raise the temperature of one mole or mass of a substance by 1°C.

The total amount of heat of a substance is the amount of heat required to raise the temperature of the given mass of the substance by 1°C.

Specific heat is an intensive property and does not depend on the amount of matter that is present within a substance.

Total amount of heat is an extensive property of matter and it is predicated on the amount of matter present.

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3 years ago

A sound wave has frequency of 430 Hz in air . Which of these is closet to the wavelength of this sound? ( The speed of sound in

Darya [45]

I think it would be E. The higher the object the less wavelength is possible.

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3 years ago