answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
irinina [24]
2 years ago
5

If the universe is sufficiently dense, gravity will someday pull it all back together in an event called ________, sort of like

the big bang in reverse.
Physics
1 answer:
AleksandrR [38]2 years ago
4 0

Answer:

Big Crunch.

Explanation:

Big Crunch is defined as the event which defines the universe's ultimate fate, in this process the universe expansion will reverse which causes the cosmic factor will reach to zero and this is followed by an event which causes the reformation of universe with another Big bang.

The Scenario of the Big Crunch hypothesis that the matter density throughout the universe is extremely high and can be say that it sufficiently dense by which, the attraction through gravity is too large which can overcome the universe's expansion and it can be say that it is the big bang in reverse.

You might be interested in
Which of the following is NOT a good way to reduce fuel consumption?
Sidana [21]

Answer:

Explanation:

d

4 0
2 years ago
Read 2 more answers
In some amazing situations, people have survived falling large distances when the surface they land on is soft enough. During a
OleMash [197]

Answer:

-3413 ft/s2

Explanation:

We need to know the velocity with which he landed on the snow.

He 'dropped' from 512 feet. This is the displacement. His initial velocity is 0 and the acceleration of gravity is 32 ft/s2.

We use the equation of mition

v^2 = u^2 + 2as

v and u are the initial and final velocities, a is the acceleration and s is the displacement. Putting the appropriate values

v^2 = 0^2 + 2\times32\times512

v = \sqrt{2\times32\times512} = 128\sqrt{2}

This is the final velocity of the fall and becomes the initial velocity as he goes into the snow.

In this second motion, his final velocity is 0 because he stops after a displacement of 4.8 ft. We use the same equation of motion but with different values. This time, u=128\sqrt{2}, v = 0 and s = 4.8 ft.

0^2 = (128\sqrt{2})^2 + 2a\times4.8

a = -\dfrac{2\times128^2}{2\times4.8} = -3413

Note that this is negative because it was a deceleration, that is, his velocity was decreasing.

5 0
2 years ago
Finally, you are ready to answer the main question. Cheetahs, the fastest of the great cats, can reach 50.0 miles/hourmiles/hour
slavikrds [6]

Answer:

The acceleration of the cheetahs is 10.1 m/s²

Explanation:

Hi there!

The equation of velocity of an object moving along a straight line with constant acceleration is the following:

v = v0 + a · t

Where:

v = velocity of the object at time t.

v0 = initial velocity.

a = acceleration.

t = time

We know that at t = 2.22 s, v = 50.0 mi/h. The initial velocity, v0, is zero.

Let's convert mi/h into m/s:

50.0 mi/h · (1609.3 m / 1 mi) · (1 h / 3600 s) = 22.4 m/s

Then, using the equation:

v = v0 + a · t

22.4 m/s = 0 m/s + a · 2.22 s

Solving for a:

22.4 m/s / 2.22 s = a

a = 10.1 m/s²

The acceleration of the cheetahs is 10.1 m/s²

5 0
2 years ago
Suppose astronomers discover a new planet farther away from the Sun than Earth. How would the day and year of this planet compar
posledela
I think the answer would be C. because the orbit around the sun compared to the Earth's (Identifies the seasons change and the year) would be longer, but the day is unknown because that is where it would come down to the total mass of the planet and other important factors about the planets properties.
6 0
2 years ago
Read 2 more answers
Cylinder A is moving downward with a velocity of 3 m/s when the brake is suddenly applied to the drum. Knowing that the cylinder
Xelga [282]

Answer:

Incomplete question

Check attachment for the given diagram

Explanation:

Given that,

Initial Velocity of drum

u=3m/s

Distance travelled before coming to rest is 6m

Since it comes to rest, then, the final velocity is 0m/s

v=3m/s

Using equation of motion to calculate the linear acceleration or tangential acceleration

v²=u²+2as

0²=3²+2×a×6

0=9+12a

12a=-9

Then, a=-9/12

a=-0.75m/s²

The negative sign shows that the cylinder is decelerating.

Then, a=0.75m/s²

So, using the relationship between linear acceleration and angular acceleration.

a=αr

Where

a is linear acceleration

α is angular acceleration

And r is radius

α=a/r

From the diagram r=250mm=0.25m

Then,

α=0.75/0.25

α =3rad/sec²

The angular acceleration is =3rad/s²

b. Time take to come to rest

Using equation of motion

v=u+at

0=3-0.75t

0.75t=3

Then, t=3/0.75

t=4 secs

The time take to come to rest is 4s

7 0
2 years ago
Other questions:
  • A boy is pushing a chair by applying a force of 5 newtons. His mother helps him push it faster by applying an additional force o
    13·2 answers
  • Iron(II) carbonate (FeCO3) has a solubility product constant of 3.13 x 10-11 . Calculate the molar solubility of FeCO3 in water
    11·1 answer
  • A taxi starts from Monument Circle and travels 5 kilometers to the east for 5 minutes. Then it travels 10 kilometers to the sout
    6·2 answers
  • Un ladrillo se le imparte una velocidad inicial de 6m/s en su trayectoria hacia abajo. ¿cual sera su velocidad final despues de
    9·1 answer
  • A hot–air balloon is moving at a speed of 10.0 meters/second in the +x–direction. The balloonist throws a brass ball in the +x–d
    10·1 answer
  • If the radius of the sun is 7.001×105 km, what is the average density of the sun in units of grams per cubic centimeter? The vol
    13·1 answer
  • A student uses a spring scale to exert a horizontal force on a block, pulling the block over a smooth floor. the student repeats
    13·1 answer
  • 8. The fact that voltage can be created by exerting force on a crystal is used in which type of sensor?
    5·1 answer
  • Reset the PhET simulation (using the button in the lower right) and set it up in the following manner: select Oscillate, select
    15·1 answer
  • If the ac peak voltage across a 100-ohm resistor is 120 V, then the average power dissipated by the resistor is ________
    12·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!