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3 years ago

HELP PLZZZZZ NOW!!!

Physics

2 answers:

adelina 88 [10]3 years ago

4 0

Answer:

Explanation:,

Aneli [31]3 years ago

3 0

Answer:Climatic processes affect the dynamics of Earth's ice sheets and glaciers, and along ... by abrupt events and by continuous reshaping of Earth's surface from surface ... Forecasting natural disasters, including the timing and size of earthquakes, the . Last, human activity has a profound impact on water resources, landscape

Explanation:

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You might be interested in

Why do astronomers hypothesize that a massive black hole lies at the center of M87? Historical records show that a supermassive

antiseptic1488 [7]

<h2>Answer: A very small region at the center of M87 releases an enormous amount of energy.</h2>

According to Einstein's theory of relativity, a<u> black hole is a "singularity"</u> that consists of a region of the space in which the density of matter tends to infinity. In consequence, this huge massive body has a gravitational pull so strong that not even light can escape from it.

In addition, "the surface" of a black hole is called the event horizon, which is the border of space-time in which the events on one side of it can not affect an observer on the other side.

In other words, at this border also called "point of no return", nothing can escape (not even light) and no event that occurs within it can be seen from outside.

In this sense, and according to the relativity, <u>it is possible to determine where a black hole is if it is "observed" an enormous amount of energy released.</u> So, in accordance to this, galaxies like ours must have a black hole in its center.

On the other hand, the elliptical galaxy Mesier 87 (also called <u>Virgo A,</u> but from now on M87) was showing the above described behaviour, with enormous jets of high-energy particles shooting away from its vicinity . This was imaged by the Hubble Space Telescope years ago; that is why astronemers were hypothesizing about the existence of a massive black hole there.

Well now, on April, 10th 2019 this was demonstrated with the publication of the image, for the first time, of the event horizon of the black hole in M87. This is the first time in human history a picture of a black hole is taken.

This was done by the huge effort of diverse scientist and by the syncronization of eight radio telescopes scattered across the Earth (located at: Hawaii, Spain, Chile, Mexico, Arizona and the South Pole), which took the same point of the sky at the same time.

7 0

3 years ago

4. A 1.0 kg ball has a momentum of 12 kg m/s . What is the ball’ speed?

valentinak56 [21]

Answer:

12 m/s

Explanation:

6 0

3 years ago

Read 2 more answers

Please need help with this

Mademuasel [1]

A 'velocity' is built out of a speed and a direction.

The only item on that list that has a speed and a direction is the <em>first one</em>. The speed is 30 m/s and the direction is south.

8 0

4 years ago

CAN SOMEONE PLEASE HELP ME WITH MY PHYSICS QUESTIONS? I NEED CORRECT ANSWERS ONLY!

BARSIC [14]

<h2>Right answer: acceleration due to gravity is always the same </h2><h2 />

According to the experiments done and currently verified, in vacuum (this means there is not air or any fluid), all objects in free fall experience the same acceleration, which is <u>the acceleration of gravity</u>.

Now, in this case we are on Earth, so the gravity value is $9.8\frac{m}{s^{2}}$

Note the objects experience the acceleration of gravity regardless of their mass.

Nevertheless, on Earth we have air, hence <u>air resistance</u>, so the afirmation <em>"Free fall is a situation in which the only force acting upon an object is gravity" </em>is not completely true on Earth, unless the following condition is fulfiled:

If the air resistance is <u>too small</u> that we can approximate it to <u>zero</u> in the calculations, then in free fall the objects will accelerate downwards at $9.8\frac{m}{s^{2}}$ and hit the ground at approximately the same time.

5 0

4 years ago

A sound wave has a speed of 342 m/s and a wavelength of 2.15 meters. What is the frequency of this wave?

jeka94

Answer:

159HZ A

Explanation:

frequency= speed/wavelength

frequency= 342/2.15=159HZ

7 0

3 years ago