A spaceship travels to a star 95 light years away at a speed of 2.2 E 8 m/s. How long does it take to get there a. ) as measured on earth and b. ) as measured by a passenger on the spaceship
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A spaceship travels to a star 95 light years away at a speed of 2.2 E 8 m/s. How long does it take to get there a. ) as measured on earth and b. ) as measured by a passenger on the spaceship
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- A spaceship has proper length L_p and passes by a person standing on Earth. The personstanding on Earth measures that it takes time delta_t for the spaceship to pass a fixed point on theEarth. What is the speed (v) of the spaceship, according the person standing on Earth? Giveyour answer for v in terms of L_p, delta_t, and c (the speed of light).Muons are elementary particles that are similar to electrons. However, they are more heavy than an electron, and they decay within 2 micro seconds into an electron and two neutrinos. Estimate how far a muon could travel before it decays if its velocity is 0.995 c.1 2. Preparations are under way for a spacecraft visit to the Alpha Centauri star system, 4.30- lightyears away Provisions are placed on board to allow for a trip of 8 years. a. What minimum speed must the spacecraft travel relative to Earth if the provisions are to last?
- 1. You are an observer in a 100-m long spacecraft traveling from the earth to the moon at 0.8c. (a)What is the proper length of the spacecraft? (b) For a proper time interval of 1 sec., the relativistic time interval for the spacecraft measured from the earth reference frame would be: (c)Time dilation does not apply to all time-dependent physical and biological processes. T/F? (c) What is the relativistic length, DL measured from the reference frame of earth? (d) An APOLLO crew left a flat mirror reflector on the surface of the moon (for all you deniers out there, in the 50th anniversary year of APOLLO 11!). If the average surface-to-surface distance from the earth to the moon is 3.83 x 10^8 m, then how long does it take moonlight to reach earth?a) Find the value of y for the following situation. An astronaut measures the length of his spaceship to be 100 m, while an earthbound observer measures it to be 25 m. b) What is the speed of the spaceship relative to Earth?As spaceship A moves away from the earth at 0.550c, the captain observes a second spaceship (B) moving in the same direction at a speed of 0.518c relative to A. Find the speed of B relative to the earth. с
- An observer measures a spacecraft’s length to be exactly half of its rest length. a) What is the speed of the ship relative to the observer’s frame of reference? b) By what factor do the spaceship’s clocks run slow relative to clocks in the observer’s frame?Chapter 37, Problem 015 The center of our Milky Way galaxy is about 24000 ly away. (a) To eight significant figures, at what constant speed parameter would you need to travel exactly 24000 ly (measured in the Galaxy frame) in exactly 27 y (measured in your frame)? (b) Measured in your frame and in lightyears, what length of the Galaxy would pass by you during the trip? (a) Number Units (b) Number UnitsAn alarm clock is set to sound in 10.0 = h. Att 0, the clock is placed in a spaceship moving with a speed of 0.736 c (relative to Earth). What distance, as determined by an Earth observer, does the spaceship travel before the alarm clock sounds? (Hint: Keep track of your units!) answer in m
- A newly constructed spaceship has a length of 100.0 m (as measured in the rest frame). This spaceship departs the Earth, bound for a distant planet located a distance D = 50.0 light-years away from the Earth. It travels at a constant speed of v = 0.900c. Part A) As measured by Mission Control on Earth, how long does the journey take? Enter the numerical value in units of years. Part B) According to an astronaut on the spaceship, how long does the journey take? Enter the numerical value in units of years. Part C) As measured by Mission Control on Earth, what is the spaceship's apparent length? Enter the numerical value in SI unitsA 20 year old Physics student volunteers to go on a long flight in a spacecraft that travels close to the speed of light. As measured on Earth the Physics student is gone for 10 years, biologically speaking though when the student returns they are... exactly 10 years old. exactly 30 years old. younger than 30 years old. older than 30 years old.A spaceship moves past Earth with a speed of 0.878c. As it is passing, a person on Earth measures the spaceship's length to be 71.2 m. HINT (a) Determine the spaceship's proper length (in m). m (b) Determine the time (in s) required for the spaceship to pass a point on Earth as measured by a person on Earth. (c) Determine the time (in s) required for the spaceship to pass a point on Earth as measured by an astronaut onboard the spaceship. |s