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2 years ago

Where are metamorphic rocks formed? And how are they formed

Physics

1 answer:

den301095 [7]2 years ago

8 0

Answer:

Metamorphic rocks form when rocks are subjected to high heat, high pressure, hot mineral-rich fluids or, more commonly, some combination of these factors. Conditions like these are found deep within the Earth or where tectonic plates meet.

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A sound wave has a frequency of 741 hz in air a wavelength of 0.47m what is the temperature of the air as soon as the below city

nekit [7.7K]

Answer:

Temperature when sound wave with wavelength 0.47m has frequency 741 hz is 188 degrees Centigrade.

Step-by-Step Explanation:

Given:

Speed of sound at 0 degrees centigrade = 235 ms

frequency = f = 741 hz

wavelength = w = 0.47m

speed of sound wave = wavelength * frequency = 741 * 0.47 = 348.27 m/s

Using the formula for speed of sound at a specific temperature:

Speed of sound at T degrees Centigrade = Speed of sound at 0 degrees + 0.6 * T

When speed of sound is 348 m/s, the temperature is given by:

348 = 235 + 0.6(T)

T = (348-235)/0.6

T = 188 degrees Centigrade

6 0

3 years ago

The flux through the coils of a solenoid changes from 2.57.10-5 Wb to 9.44.10-5 Wb in 0.0154 s. If 4.08 V of EMF is generated, h

Vinil7 [7]

Hello!

We can use Faraday's Law of Electromagnetic Induction to solve.

$\epsilon = -N \frac{d\Phi_B}{dt}$

ε = Induced emf (4.08 V)
N = Number of loops (?)

$\Phi_B$ = Magnetic Flux (Wb)
t = time (s)

**Note: The negative sign can be disregarded for this situation. The sign simply shows how the induced emf OPPOSES the current.

Now, we know that $\frac{d\Phi_B}{dt}$ is analogous to the change in magnetic flux over change in time, or $\frac{\Delta \Phi_B}{\Delta t}$ , so:
$\epsilon = N \frac{\Delta \Phi_B}{\Delta t}\\\\\epsilon = N \frac{\Phi_{Bf} - \Phi_{Bi}}{\Delta t}$

Rearrange the equation to solve for 'N'.

$N = \frac{\epsilon}{ \frac{\Phi_{Bf} - \Phi_{Bi}}{\Delta t}}$

Plug in the given values to solve.

$N = \frac{4.08}{ \frac{9.44*10^{-5} - 2.57*10^{-5}}{0.0154}} = 914.585 = \boxed{915 \text{ coils}}$

**Rounding up because we cannot have a part of a loop.

4 0

2 years ago

Before radiant energy can be converted to thermal energy,it must be changed to what

vivado [14]

Answer:

The radiant energy is converted into electronic energy before it is transformed into thermal energy.

Explanation:

Radiant energy occurs in the form of "Electromagnetic radiation" and it can pass through all types of matter travelling through the universe. There are numerous advantages of radiant energy. When the radiant energy is incident upon a substance the energy from the sun light excites the electrons in the atom. This sets the atoms in vibrational motion.

Thermal energy is the kinetic energy of moving particles. The thermal energy increases with increase in movement and number of moving particles. When the atoms make a transition from electronically excited state to vibrational state, the energy transfer increases the temperature of the substance. This is felt as thermal energy. Hence, the radiant energy is changed into "electronic energy" before it is converted into "thermal energy".

5 0

4 years ago

Could an elephant have the same momentum as a golf ball

aleksandr82 [10.1K]

Answer:

Since momentum equals mass times velocity, a very slow-moving elephant could have the same momentum as a very fast-moving golf ball. ... m/s because momentum is conserved.

8 0

3 years ago

Read 2 more answers

NASA is giving serious consideration to the concept of solar sailing. A solar sailcraft uses a large, lowmass sail and the energ

Elan Coil [88]

Answer:

a) the reflective surface has twice the energy transfer

b) A = 1.3 10²⁷ km²

c) the energy emitted by the sun is distributed in a sphere that depends on the square of the distance, and the gravitational force depends on the square of the distance

Explanation:

a) The pressure exerted on the candle is related to the variation of the momentum

P = $\frac{1}{c} \ \frac{dp}{dt}$

in a case of absorption (inelastic shock) all the energy is absorbed therefore the pressure is

P = \frac{1}{c} \ \frac{dp}{dt}

in the case of reflection (elastic shock) an energy is absorbed by absorbing the light and then by action and reaction the same energy is absorbed in the reflected light

P = 2 \frac{1}{c} \ \frac{dp}{dt}

In conclusion, the reflective surface has twice the energy transfer.

b) pressure is defined with force per unit area

P = F / A

F = P A

this force must be greater than the gravitational force of attraction of the sun

Fg = G m Ms / r²

let's look for the case that the two forces are equal

F = Fg

P A_sail = G m Ms = r²

suppose a fully reflective sail

$2 \frac{S}{c} \ A_{sail} = G \frac{m M_s}{r^2}$

The pointing vector is the power delivered per unit area

S = I = P / A

where A is the area of the sphere where the is distributed by the sun

A = 4π r²

we substitute

$\frac{2P}{c} \ \frac{A_{sail}}{4 \pi r^2} = G \frac{m M_s}{r^2}$

$\frac{1}{2 \pi \ c }$ A_{sail} = G m M_s

A = G m M_s 2π c

let's calculate

A = 6.67 10⁻¹¹ 10000 2 10³⁰ 2π 3 10⁸

A = 1,257 10³³ m²

let's reduce to km²

A = 1.3 10³³ m² (1km / 10³ m) ²

A = 1.3 10²⁷ km²

c) The size of the candle is independent of the distance to the sun because the energy emitted by the sun is distributed in a sphere that depends on the square of the distance, and the gravitational force depends on the square of the distance, therefore the two dependencies are canceled.

8 0

3 years ago