David is 30 years old, and his sister Alexis is 25 years old, when David leaves to travel to planet Rosebud. Planet Rosebud is 20 lightyears away, and at rest relative to the Earth, and David travels at 0.85c. When David begins his journey, he is 5 years older than Alexis. When David arrives at planet Rosebud, who is older (David or Alexis) and by how much?

Q: Sam leaves Venus in a spaceship headed to Mars and passes Sally, who is on Earth, with a relative…

A: a) As the departure of Sam and Sally from Venus and the arrival at Mars id happening at the same…

Q: A space shuttle passes the Earth at a speed of 0.80c. If the space shuttle is 30 m in length as…

A: Given: The speed of the space shuttle is 0.8c. The length of the space shuttle is 30 m.

Q: You are an observer in a 100-m long spacecraft traveling from the earth to the moon at 0.8c. (a)…

A: Given: Length of the spacecraft as per observer (you) is 100 m Speed 'v' = 0.8 c

Q: An extra-terrestrial creature travels at a speed of 0.5c. According to the clock on the earth, the…

A: Given data: Speed of extra-terrestrial creature is, v=0.5c. Time duration of trip is, t=17 days=17…

Q: A spaceship in distress sends out two escape pods in opposite directions. One travels at a speed v1…

A:

Q: A space beacon on Planet Karma emits a pulse of light every second. Spaceman Trevor flies directly…

A: Given data: Speed of Trevor, v=0.95c

Q: A pion is an unstable particle that has an average lifetime of 2.55 x 10$ s. This is the time…

A:

Q: A space traveler takes off from Earth and moves at speed 0.9900c toward the star Vega, which is…

A:

Q: A space traveler takes off from Earth and moves at speed 0.9700c toward the star Vega, which is…

A: in this question  we use simple space motion equation  and get answer.

Q: It has been proposed that spaceships of the future will be powered by ion propulsion engines in…

A: Given that, The velocity of ions relative to the engine vis=-0.80c The velocity of the ship relative…

Q: The proper length of one spaceship is three times that of another. The two spaceships are traveling…

A: Consider The proper length of slower spaceship is "L" The proper length of faster spaceship "3L"The…

Q: Our spacecraft is passing the Earth at a speed of 0.9c. Then after traveling for 10 years, we make a…

A:

Q: With respect to the earth, object 1 is moving at speed 0.90c to the right. Object 2 is moving to the…

A: See below

Q: How far from the earth would you be able to travel in a lifetime of 82 years if you were able to…

A:

Q: A spacecraft travelling at a speed of 0.95 c goes from the planet Jupiter to the planet Pluto A…

A:

Q: A proton has momentum with magnitude p0 when its speed is 0.400c. In terms of p0 , what is the…

A: Momentum is po when the speed is 0.4 c

Q: How far from the earth would you be able to travel in a lifetime of 75 years if you were able to…

A: Given:lifetime, ∆t0 = 75 yrsspeed, v = 0.62 c

Q: A spaceship is moving away from Earth at 0.812c when it fires a small rocket in the forward…

A: Given data: Speed of space ship with respect to earth, vSE=0.812c Speed of rocket with respect to…

Q: A particle is moving at a speed of 0.925c and travels from one end of a 50 m long Physics lab to the…

A:

Q: The origins of two frames coincide at t = t' = 0 and the relative speed is 0.956c. Two…

A: If the relative speed between S and S' frame is v then the Lorentz transformation gives the…

Q: a) Galactus tries to destroy the Earth by stopping the Moon in its orbit. What effect would this…

A: According to special theory of relativity, the time measured by moving objects is lees than…

Q: Two protons, each having a speed of 0.990c in the laboratory, are moving toward each other.…

A: Given data : Speed of protons is, v=v1=v2=0.990c

Q: A rocket launched outward from Earth has a speed of 0.38c relative to the Earth. The rocket is…

A: The speed of the meteor as observed from earth is     0.435967c  m/s.

Q: 1) A space traveler takes off from Earth and moves at speed 0.99c toward the star Vega, which is…

A: when an object moves with light of speed or near by difference in time frame has been noted.

Q: An observer on Earth sees Planet X to be stationary and also sees a rocket travel from Earth toward…

A: When an object travels with speed comparable to the speed of light, then the classical velocity…

Q: An extraterrestrial spaceship is moving away from the earth after an unpleasant encounter with its…

A:

Q: A spacecraft has a speed of 0.4c relative to Earth. As measured on Earth, the elapsed time between…

A:

Q: In the lab frame, two protons are moving away from each other at equal speed. In the rest frame of…

A: Let us assume that the earth's rest frame is S, Proton 1's frame is S'. The velocity of Proton 1…

Q: Two spaceships, each 100 m long when measured at rest, travel toward each other with speeds of 0.85c…

A: Given Two spaceships length ( L0 ) = 100m Spaceship speed relative to earth ( v ) = 0.85c      ⇒…

Q: Answering an emergency beacon, Captain Jack leaves the Earth on a rescue mission at 0.60c, arriving…

A: Given data: -  The speed at which Captain Jack leaves the earth is v = 0.60c. The arrival time at…

Q: A spaceship travels at 0.750c relative to Earth. If the spaceship fires a small rocket in the…

A:

Q: An astronaut inside a spacecraft moving at 0.89c measure the length of the ship as being 100 m. How…

A:

Q: A high-energy proton leaves the sun at 0.430c. In the frame of the proton, what is the distance to…

A: Given:- A high-energy proton leaves the sun at 0.430c Find:- In the frame of the proton,…