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
mamaluj [8]
3 years ago
9

Galaxy B moves away from galaxy A at 0.577 times the speed of light. Galaxy C moves away from galaxy B in the same direction at

0.731 times the speed of light. How fast does galaxy C recede from galaxy A?
Physics
1 answer:
Pepsi [2]3 years ago
7 0

Answer:

The value is  p = 0.7556 c

Explanation:

From the question we are told that

   The speed at which galaxy B moves away from galaxy A is  v =  0.577c

Here c is the speed of light with value  c = 3.0 *10^{8} \  m/s

     The speed at which galaxy C moves away from galaxy B is  u  =  0.731 c

Generally from the equation of  relative speed we have that  

     u   =  \frac{p - v}{ 1 - \frac{ p * v}{c^2} }

Here p is the velocity at which galaxy C recede from galaxy A so

     0.731c   =  \frac{p - 0.577c }{ 1 - \frac{ p * 0.577c}{c^2} }

=>   0.731c  [1 - \frac{ p * 0.577}{c}]  = p - 0.577c

=>   0.731c  -  0.4218 p = p - 0.577c

=>   0.731c  + 0.577c = p  + 0.4218 p

=>   1.308 c  = 1.731 p

=>    p = 0.7556 c

You might be interested in
What will happen if you put a usb drive and a magnet too closely together?
kakasveta [241]
<span>If you put a magnet right next to a USB drive, depending on the strength of the magnet and the amount of steel, nickel or cobalt used in the construction of that particular model of USB drive, the drive would either adhere to, or not adhere to, the magnet. This would cause no other significant effects. The storage of data in solid state form (as in USB drives) is not magnetic in nature, so no deletion or any other damage of the stored data would occur.</span>
6 0
3 years ago
Read 2 more answers
Kirk wants to know if someone his height will go faster on a bike with a larger frame. What should he do next in order to follow
bearhunter [10]

Answer:

The answer is A but I could be wrong

8 0
3 years ago
Read 2 more answers
An echo is heard from a cliff 3.71 s after a rifle is fired. How many feet away is the cliff
LenKa [72]

The cliff is 2042 ft away.

We know that the speed of sound in air is directly proportional to the absolute temperature.

First convert the Fahrenheit temperature to Celsius;

 °C = 5/9(44.5 - 32)

°C = 6.9 °C

Applying the formula;

V1/V2 = √T1/T2

Where; V1 = velocity of sound in air at  0°C

V2 = Velocity of sound in air at 6.9 °C

1087/V2 = √273/279.9

V2= 1101 ft/s

Given that; V = 2s/t

Where s is the distance of the cliff

t is the time taken

1101 ft/s = 2s/3.71 s

s = 1101 ft/s × 3.71 s/2

s = 2042 ft

Learn more:brainly.com/question/15381147

3 0
3 years ago
The presently accepted value of the hubble constant gives an age of
koban [17]

Answer:

14 billion years

Explanation:

The Hubble – Lemaître law, previously called the Hubble law, is a law of physics that states that the redshift of a galaxy is proportional to the distance it is, which is the same as, the further one galaxy is found from another, more quickly it seems to move away from it.

The Hubble constant is the value that measures the rate at which the expansion speed of the Universe varies with distance, and is one of the fundamental parameters of the Universe and allows, in particular, to determine the age of the Universe as we will see.

6 0
3 years ago
A weightlifter works out at the gym each day. Part of her routine is to lie on her back and lift a 43 kg barbell straight up fro
Tasya [4]

Answer:

A. 231.77 J

B. 5330.71 J

C. 46 donuts

Explanation:

A. To lift the barbell once, she will have to extend it the full length of her arm. The work done will then be:

W = F * d

Where the force is the weight of the barbell.

F = m * g

Hence, the work done in lifting the barbell is:

W = m * g * d

W = 43 * 9.8 * 0.55

W = 231.77 J

B. If she does 23 repetitions, the total energy she expend will be equal to the Potential energy when the barbell is lifted multiplied by 23:

E = 23 * m * g * d

E = 23 * 231.77

E = 5330.71 J

C. 1 Joule = 4.184 calories

5330.71 Joules = 5330.71 * 4.184 = 22303.69

If 1 donut contains 490 calories, the number of donuts she will need will be:

N = 22303.69/490 = 45.5 donuts or 46 donuts

5 0
3 years ago
Other questions:
  • If you wished to warm 100 kg of water by 15 degrees celsius for your bath, how much heat would be required? (give your answer in
    12·1 answer
  • 15 beats are heard in 5 seconds when a piano key and a tuning fork of slightly higher frequency (440 Hz) are struck at the same
    8·1 answer
  • A homeowner installs an electrical heated mirror into the shower room. When a person has a shower, the heated mirror does not go
    5·2 answers
  • Please type a three paragraph essay (5-7 sentences per paragraph), and the essay should include the following things:
    12·1 answer
  • Use the table to answer the question.
    9·1 answer
  • What type of wave is sound?<br> a. longitudnal<br> b. surface<br> c. tranverse,<br> or d.. light ? ?
    11·2 answers
  • How do you calculate the magnitude of the resultant force of two
    10·2 answers
  • Throw a paper ball towards a hard wall.
    7·1 answer
  • Within a few sentences, explain the difference between meiosis and mitosis.
    8·1 answer
  • -4, 0, -2/3, 4.11111…, 2, π, √6 'which members of this set are irrartional?
    13·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!