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
Volgvan
3 years ago
10

A spaceship is headed toward Alpha Centauri at 0.999c. According to us, the distance to Alpha Centauri is about 4 light-years. H

ow far away is Alpha Centauri according to the travelers in the ship?
a) also about 4 light-years
b) very slightly more than 4 light-years
c) very slightly less than 4 light-years
d) quite a bit less than 4 light-years
e) quite a bit more than 4 light-years
Physics
1 answer:
aniked [119]3 years ago
4 0

Answer:

According to the travellers, Alpha Centauri is <em>c) very slightly less than 4 light-years</em>

<em></em>

Explanation:

For a stationary observer, Alpha Centauri is 4 light-years away but for an observer who is travelling close to the speed of light, Alpha Centauri is <em>very slightly less than 4 light-years. </em>The following expression explains why:

v = d / t

where

  • v is the speed of the spaceship
  • d is the distance
  • t is the time

Therefore,

d = v × t

d = (0.999 c)(4 light-years)

d = 3.996  light-years

This distance is<em> very slightly less than 4 light-years. </em>

You might be interested in
A cow runs left word 50 M to eat some apples then walks left word another 100 and to munch on some flowers the cows total travel
Lelechka [254]

Answer: velocity = -0.65 speed =0.65

Explanation:

Velocity =speed+direction speed =distance/time

5 0
3 years ago
Amy runs 2 blocks south, then turns around and runs 3 blocks north. what is the distance and displacement
Elenna [48]

Answer: Distance=  5 blocks and displacement= -1 block

Explanation: distance is the total length of a journey while displacement is the shortest straight length of a journey!

5 0
3 years ago
At which point on this electric field will a test charge show the maximum strength?
Juli2301 [7.4K]

Answer:

A

Explanation:

The figure shows the electric field produced by a spherical charge distribution - this is a radial field, whose strength decreases as the inverse of the square of the distance from the centre of the charge:

E\propto \frac{1}{r^2}

More precisely, the strength of the field at a distance r from the centre of the sphere is

E=k\frac{Q}{r^2}

where k is the Coulomb's constant and Q is the charge on the sphere.

From the equation, we see that the field strength decreases as we move away from the sphere: therefore, the strength is maximum for the point closest to the sphere, which is point A.

This can also be seen from the density of field lines: in fact, the closer the field lines, the stronger the field. Point A is the point where the lines have highest density, therefore it is also the point where the field is strongest.

8 0
3 years ago
PLEASE HELP can not find the answer
romanna [79]
I think the answer would be letter B.
7 0
3 years ago
TIME REMAINING
Ber [7]
Mass and velocity I think
3 0
2 years ago
Read 2 more answers
Other questions:
  • A 20.0 kg mass moving at a velocity of + 3.0 m/s is stopped by a constant force of 15.0 n. how many seconds must the force act o
    11·1 answer
  • Which class of hard hats does not protect you from electrical shock?
    5·2 answers
  • The state of matter that has particles in a fixed position, with a definte volume and shape is
    14·1 answer
  • How does potential difference behave in a parallel circuit
    15·2 answers
  • The current in a hair dryer measures 20.0 amps. The resistance of the hair dryer is 6 ohms. What is the voltage?
    14·1 answer
  • Can someone do 2-5 for me please
    5·1 answer
  • What describes the movement of a fluid during convection?
    6·1 answer
  • Eating 2500 Cal every day a friend of mine maintains a stable weight of 70 kg. One day, after eating 3500 Cal, he decided to do
    15·1 answer
  • When one does twice the work in twice the time, the power expended is
    6·1 answer
  • A sample contains 16 g of a radioactive isotope. how much radioactive
    14·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!