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
erica [24]
3 years ago
5

Suppose you are planning a trip in which a spacecraft is to travel at a constant velocity for exactly six months, as measured by

a clock on board the spacecraft, and then return home at the same speed. Upon return, the people on earth will have advanced exactly 120 years into the future. According to special relativity, how fast must you travel
Physics
1 answer:
mylen [45]3 years ago
6 0

Answer:

<em>I must travel with a speed of 2.97 x 10^8 m/s</em>

Explanation:

Sine the spacecraft flies at the same speed in the to and fro distance of the journey, then the time taken will be 6 months plus 6 months

Time that elapses on the spacecraft = 1 year

On earth the people have advanced 120 yrs

According to relativity, the time contraction on the spacecraft is gotten from

t = t_{0} /\sqrt{1 - \beta ^{2} }

where

t is the time that elapses on the spacecraft = 120 years

t_{0} = time here on Earth = 1 year

\beta is the ratio v/c

where

v is the speed of the spacecraft = ?

c is the speed of light = 3 x 10^8 m/s

substituting values, we have

120 = 1/\sqrt{1 - \beta ^{2} }

squaring both sides of the equation, we have

14400 = 1/(1 - \beta ^{2} )

14400 - 14400\beta ^{2} = 1

14400 - 1 = 14400\beta ^{2}

14399 = 14400\beta ^{2}

\beta ^{2} =  14399/14400 = 0.99

\beta = \sqrt{0.99} = 0.99

substitute β = v/c

v/c = 0.99

but c = 3 x 10^8 m/s

v = 0.99c = 0.99 x 3 x 10^8 = <em>2.97 x 10^8 m/s</em>

You might be interested in
Can you give me the definition of sound wave
katrin [286]
A sound wave is a wave of compression and rarefaction, by which sound is propagated in an elastic medium such as air.

3 0
3 years ago
Read 2 more answers
What is transmitted by all waves? a. energy b.mass c.matter b.sound
Evgesh-ka [11]
A. Energy is transmitted by all waves.
7 0
2 years ago
Read 2 more answers
A solution is a homogeneous mixture of one or more solutes dissolved in a solvent. A specific volume of solvent is only able to
Luba_88 [7]
<h3><u>Answer;</u></h3>

C. Supersaturated

<h3><u>Explanation</u>;</h3>
  • Solutions are homogeneous mixtures that are created by mixing a solute and a solvent. Solute is the substance present in smaller amounts that dissolves in a solvent such as water which is the substance present in larger amount.
  • A solution, can be<u> unsaturated, saturated or supersaturated. An unsaturated solution</u> is a solution that contains less solute that can be dissolved, it doesn't contain the maximum amount of solute.
  • <u>A saturated solution</u> is a solution containing the maximum amount of solute that can be dissolved at a given temperature. Any additional solute will remain undissolved in the container.
  • <u>A supersaturated solution</u> is a solution created when a solution is carefully cooled because it contains more solute than the solubility allows.
7 0
3 years ago
Read 2 more answers
What resistance would produce a current of 200A with a potiential difference of 200V?
viktelen [127]
Aw, I hate physics, is this on Apex?

Resistance can be calculated with the information given in the question.
Equation for Resistance: R = V/I
V (voltage) = 200 Volts
I (current) = 200 Amps

So 200 divided by 200 = freaking 1

Answer: R = 1 (ohms)

Hope this Helps!

5 0
3 years ago
What is the difference between human caused Climate Change and natural<br> climate cycles?
Andre45 [30]
Human caused climate change is climate change caused by human made creations such as cars, trucks, factories, and plastic in oceans these all are causing the ozone layer to deteriorate. And natural climate change cycles is any change occurring to the planet's climate either permanently or lasting for long periods of time.
4 0
2 years ago
Other questions:
  • If element x has 94 protons how many electrons does it have​
    13·2 answers
  • The length of a vector indicates the magnitude of the vectoor<br>A. True<br>B. False​
    8·2 answers
  • How is an anion formed?
    9·2 answers
  • Express in words AND mathematically the relationship between period and frequency
    7·2 answers
  • A 1000 kg car makes a turn on a banked curve. The radius is 300 m.
    13·1 answer
  • . A current-carrying gold wire has diameter 0.87 mm. The electric field in the wire is 0.54 V&gt;m. What are (a) the current car
    15·1 answer
  • (a) A narrow beam of light containing yellow (580 nm) and green (550 nm) wavelengths goes from polystyrene to air, striking the
    10·1 answer
  • A book and a piece of paper the same size fall at different rates. How can you change the shape of the paper so that it will fal
    8·1 answer
  • Forces can...
    13·1 answer
  • A small car is pushing a large truck. They are speeding up.
    8·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!