1answer.
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
dusya [7]
2 years ago
13

What do astronomers use to calculate the age of the universe? Select three options. Dark energy the age of rocks on Earth the ag

e of the oldest stars patterns of background radiation how fast distant galaxies are moving away from us.
Physics
1 answer:
lubasha [3.4K]2 years ago
5 0

The age of the universe can be calculated by :  dark energy, the age of the oldest stars patterns of background radiation, and the speed of distant galaxies moving away from the Earth.

Anything that acts as a container for energy and matter is known as the universe. The modern definition of the universe is the place that has time itself including the other heavenly entities like Comets, meteors, Stars, Planets, and many more.

The age of the universe is determined by scientists using the following ways:

  • Concept of dark energy is the property of space and it is used to predict the age of the universe as this form of energy is observed to expand the universe rapidly.
  • The age of the oldest star patterns of background radiation is another way to determine the age of the universe as the first generation of stars are formed after the big bang.
  • As per the Hubble's relation, the galaxies move away from the Earth at a certain speed are proportional to their distance. In other words, galaxies are farther as they are moving away from the Earth.

Thus, we can conclude that the age of the universe can be calculated by dark energy, the age of the oldest stars patterns of background radiation, and the speed of distant galaxies moving away from the Earth.

Learn more about the universe here:

brainly.com/question/9724831

You might be interested in
If the CD rotates clockwise at 500 rpm (revolutions per minute) while the last song is playing, and then spins down to zero angu
gavmur [86]

Answer:

Explanation:

Given that,

Initial Angular velocity w=500rpm

Converting from rpm to rad/s

1rev =2πrad

1minutes =60secs

500rpm=500rev/mins

w = 500×2π/60

wi=52.36rad/s

The final angular velocity wf=0rad/s

Time to stop is t=2.6sec

We want to find angular acceleration α

Using the equation of angular motion

wf = wi + αt.

0 = 52.36 + 2.6α

-52.36=2.6α

α = -52.36/2.6

α = -20.14rad/s²

The angular acceleration is negative because it is decelerating.

Then, α=20.14rad/s²

8 0
2 years ago
Read 2 more answers
Easy chemical formula question (9th grade)
kogti [31]

Silver and Silver (II) are different because silver (II) has more than 1 electric charge. It has 2! lol

4 0
3 years ago
*NEED ANSWER QUICKLY!*
umka21 [38]
You would have to put the number together
8 0
2 years ago
How Does Earth's gravitational force field act on objects that aren't touching Earth's surface?
natali 33 [55]

Answer:

Explanation:

Gravity is a field force since the earth does not have to actually “touch” an object to pull it toward the earth. A magnetic force is a field force that attracts or repels another magnet. Likewise, electric charges cause attracting or repelling forces without actual contact between the charges

8 0
2 years ago
Imagine a small child whose legs are half as long as her parent’s legs. If her parent can walk at maximum speed V, at what maxim
AnnZ [28]

Answer:

\boxed{v=\frac {V}{\sqrt {2}}}

Explanation:

We know that speed is given by dividing distance by time or multiplying length and frequency. The speed of the father will be given by Lf where L is the length of the father’s leg ad f is the frequency.

We know that frequency of simple pendulum follows that f=\frac {1}{2\pi} \sqrt {\frac {g}{l}}

Now, the speed of the father will be V=Lf= L\times (\frac {1}{2\pi} \sqrt {\frac {g}{l}}) while for the child the speed will be v=\frac {L}{2}\times (\frac {1}{2\pi} \sqrt {\frac {g}{0.5l}})

The ratio of the father’s speed to the child’s speed will be

\frac {V}{v}=\frac {\frac {L}{2}\times (\frac {1}{2\pi} \sqrt {\frac {g}{0.5l}})}{ L\times (\frac {1}{2\pi} \sqrt {\frac {g}{l}})}\\\frac {V}{v}=\frac {\sqrt {2}}{2}\\\boxed{v=\frac {V}{\sqrt {2}}}

8 0
2 years ago
Other questions:
  • A baseball is hit nearly straight up into the air with a speed of 22 m/s. (a) how high does it go ?
    10·1 answer
  • What is the primary consideration in choosing a solvent for crystallizing a compound
    11·1 answer
  • Which nuclear emission has the greatest penetrating power
    13·1 answer
  • Of the three types of radiation listed below, which is the least penetrating and which is the most penetrating? -alpha -beta -ga
    8·1 answer
  • Someone plz answer this quickly!!
    7·1 answer
  • Consider a car moving with a constant velocity of 90 m/s. What is it’s acceleration.
    8·2 answers
  • Write physical quantities and its unit​
    10·1 answer
  • A car travels 8km in 7 minutes. Find the speed of the car.
    13·1 answer
  • QUESTION If the angular acceleration were doubled for the same duration, by what factor would the angular displacement change
    9·1 answer
  • A car has a speed of 10 m/s and a mass of 1500 kg. what is the momentum of the car ​
    10·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!