A track is 100.0m long. A particle moves parallel to the track with v such that (v/c)2 = 0.75. In the reference frame of the particle the length of the track is: [a] 25 m [b] 50 m [c] 75 m [d] 133 m
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- A rod is to move at constant speed v along the x axis of reference frame S, with the rod's length parallel to that axis. An observer in frame S is to measure the length of the rod. The figure gives length & versus speed parameter for a range of values for B. The vertical axis scale is set by la 1.5 m. What is Lif v 0.94 cA certain X-ray machine generates X-rays from a beam of electrons accelerated from zero to 99.9999999 per cent the speed of light in a long linear accelerator of length 3.2 km. The electrons are generated in pulses of duration ∆t = 100 fs. The generated x-rays from the target are also short pulses (λ = 0.15 nm). Determine the length of one pulse of electrons. (1 fs = 1 femtosecond = 10-15 s.) A) .01 mm B) .03 mm C) .03 cm D) none of these.Two spaceships are moving along the line connecting them. One of the spaceships shoots a missile towards the other. The missile leaves the attacking spaceship at 0.955c and approaches the other at 0.755c. A u = 0.755 c u' = 0.955 c ▷ What is the relative velocity of the two spaceships? Express it as a ratio to the speed of light. Let the relative velocity of the spaceships be positive if they are approaching each other and negative if they are moving apart from one another.
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- A spacecraft flies past the earth in the direction toward the moon, a distance of 3.84 * 10^5 km. As measured by your clock on the earth, it takes 6.00 s for the clock on the spacecraft to tick off 2.00 s. You measure the length of the spacecraft in the direction of its motion to be 24.0 m. As measured by an astronaut at rest on the spacecraft, what are (a) the distance from the earth to the moon and (b) the length of the spacecraft?A UFO is observed directly above the earth moving at a constant velocity. An astronaut on the moon (3.8 x 108m from earth) observes the UFO passing overhead 5.8 s later. From the UFO's reference frame, how long did it take to travel from the earth to the moon?Your answer is partially correct. As the drawing shows, a carpenter on a space station has constructed a 30.0° ramp. A rocket moves past the space station with a relative speed of 0.773c in a direction parallel to side x. What does a person aboard the rocket measure for the angle of the ramp? Number MO 42.50 Units 30.0° X A