3 years ago

What do we mean by the event horizon of a black hole?

Physics

1 answer:

Fynjy0 [20]3 years ago

6 0

The correct answer is: C. It is the point beyond which neither light nor anything else can escape.

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Elsie is finishing second grade. If she goes to school 147 day per year and she have 10 years of school left, how many days of s

ICE Princess25 [194]

Answer:

1,323 days left

Explanation:

147 x 10 = 1,470

1470 - 147 = 1,323

Hopefully this helps you :)

pls mark brainlest ;)

6 0

3 years ago

The ground state energy of an electron in a one-dimensional trap with zero potential energy in the interior and infinite potenti

ElenaW [278]

Answer:

0.5 eV

Explanation:

$E_1$ = Initial potential energy = $2\ eV$

$E_2$ = Final potential energy

$L_1$ = Initial width

$L_2$ = Final width = $2L_1$

Energy of an electron in a one-dimensional trap is given by

$E=\dfrac{n^2h^2}{8mL^2}$

From the equation we get

$E\propto \dfrac{1}{L^2}$

So,

$\dfrac{E_1}{E_2}=\dfrac{L_2^2}{L_1^2}\\\Rightarrow E_2=\dfrac{E_1L_1^2}{L_2^2}\\\Rightarrow E_2=\dfrac{2L_1^2}{4L_1^2}\\\Rightarrow E_2=0.5\ eV$

The ground state energy will be 0.5 eV

6 0

3 years ago

A tsunami is typically formed when there is a earthquake in the ocean. The displacement of water causes extreme flooding. True o

alisha [4.7K]

Answer:

True

Explanation: Tsunami is a huge displacement of water caused by Earthquakes which took place on inside the sea floor causing extreme flooding and damages to life and tsunami is more prominent in the Pacific Ocean and Indonesia mainly because of the presence of active earthquake zones beneath the ocean. Tsunami has also been observed in the Mediterranean Sea and also in the United States around the year 1933.

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3 years ago

Which of the following describes the genotypes and the phenotype of parents whose child will definitely have a recessive trait

VikaD [51]

The answer is letter A

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3 years ago

Heat engines take input energy in the form of heat, use some of that energy to do work, and exhaust the remainder. Similarly, a

Elanso [62]

Answer:

a). $Q_{h}=1.5x10^5J$