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
julsineya [31]
3 years ago
8

Light from the star Betelgeuse takes 640 years to reach Earth. How far away is Betelgeuse in units of light-years? Name any hist

orical event that was occurring on Earth at about the time the light left Betelgeuse. Is the distance to Betelgeuse unusual compared with other stars?
Physics
2 answers:
Eduardwww [97]3 years ago
6 0

Answer:

Betelgeuse is 640 light years away from earth.

Explanation:

A light-year is an astronomical unit to measure the distance the light travels in a calendar year.

If the light from a star takes 640 years to reach us, then that star its 640ly away from us.

Betelgeuse has been labeled as a Variant Star, which means that its brightness can fluctuate over the course of years, this has made difficult for astronomers to measure the exact distance of the star. Right now the star is estimated to be around 613 and 881ly away from earth, although, for the sake of your second question, we will take 640 years as our estimated value.

In 1380 (640 years ago) the Battle of Kulikovo took place. A battle of remarkable importance to Russian history, in which the Russian army, led by Prince Dmitry of Moscow, defeated the Mongol army, defining a turning point in the Mongol dominance, and setting the bases for what Russia is today.

galina1969 [7]3 years ago
6 0

Answer:

The distance is 641.8207 light years, and the star Betelgeuse is further away when compared to other stars

Historical event: Benedict XI succeeds Boniface VIII as pope (1302)

Explanation:

the solution is in the attached Word file

Download docx
You might be interested in
Consider a line of children.
defon

Answer:

b,c

Explanation:

Velocity refers to the rate of change of position with respect to time and acceleration refers to the rate of change of velocity with respect to time. Both velocity and acceleration are vector quantities

While the line of children is rotating, <u>the player at the front of the line has the smallest linear velocity and all the children have the same angular acceleration.</u>

7 0
3 years ago
Any clue on this one
rodikova [14]

Answer: First option

Explanation: The higher the frequency, the higher the energy.

λν=c where λ is the wavelength, ν is the frequency and c is the speed of light. So when wavelength decreases, v increases and so does energy.

An AM radio wave has a very long wavelength. It therefore has a very low frequency and low energy.

A light wave has a very short wavelength. It therefore has a high frequency and high energy.

3 0
3 years ago
Hi, I am having issues with this physics question. I find it quite complicated to solve and I don't even have the answer to this
galina1969 [7]

Answer:

200 m

Explanation:

Both Jerry and Tom start at the end of the pipe where the cheese is.  Jerry then runs into the pipe at 20 m/s while Tom chases him at 10 m/s.  When Jerry reaches the other end of the pipe, where Tom's cousin is, he turns around.  Eventually, he reaches Tom again, so he turns around again.  This continues until both Tom and Jerry reach the end of the pipe where Tom's cousin is.

We need to find the distance traveled by Jerry.  We already know Jerry's speed, so we just need to find the time.  We can do that using Tom's speed and the length of the pipe.

x = vt

100 m = (10 m/s) t

t = 10 s

So both Tom and Jerry run for 10 seconds.  Since Jerry runs at a speed of 20 m/s, the distance he travels is:

x = vt

x = (20 m/s) (10 s)

x = 200 m

Jerry runs a distance of 200 meters.

8 0
3 years ago
If a fast-moving car making a loud noise approaches and moves past the person, what will happen as the distance between the two
lesantik [10]
The pitch of the sound of the car will appear to be <span>lower than the pitch of the car next to you</span>
8 0
3 years ago
!!PLEASE ANSWER ASAP!!
galina1969 [7]

A. elastic motion because that's the answer


8 0
2 years ago
Read 2 more answers
Other questions:
  • A laser beam is incident on a plate of glass that is 2.8 cm thick. The glass has an index of refraction of 1.6 and the angle of
    10·1 answer
  • A measurement standard is defined as ____.
    10·2 answers
  • In a closed system, glider A with a mass of 0.40 kg and a speed of 2.00 m/s collides with glider B at rest with a mass of 1.20 k
    8·1 answer
  • What can turn light energy into chemical energy
    10·1 answer
  • Define dry cell? Pls tell me ASAP!
    8·1 answer
  • How many newtons of force are required to move a 54.87 kg object with an acceleration of 9.8 m/s/s?
    9·1 answer
  • Dorji weight 1500n.if the total surface area of soles of his feet is 0.5 m2 what is the pressure exerted by his body on the grou
    11·1 answer
  • At a constant pressure, the volume of a gas doubles when the temperature in kelvins doubles. This is a statement of which gas la
    14·2 answers
  • Which is NOT involved in photosynthesis
    8·1 answer
  • How does a vector quantity differ from a scalar?
    12·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!