A 12500 kg (rest mass) spaceship is travelling at 0.99 c. What is the spaceship kinetic energy? (0/1 Point) 3.9 x 10^21 J 4.9 x 10^21 J 5.9 x 10^21 J
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- A particle has a rest mass of 7.15×10−27 kg and a momentum of 5.75×10−18 kg·m/s. Determine the total relativistic energy ? of the particle. ?= J Find the ratio of the particle's relativistic kinetic energy ? to its rest energy ?rest. ??rest=A neutron lives 900 s when at rest relative to an observer. How fast (as a fraction of the speed of light, c) is the neutron moving relative to an observer who measures its lifespan to be 2065 s? A. 0.938 c B. 0.965 c C. 0.982 c D. 0.910 cA car roles off the assembly line with a mass of 2000kg. A very special rocket booster, with mass 500kg, is then attached to the vehicle. This allows the car to reach a speed of 0.6c. To an observer standing outside the auto plant as the car goes by at maximum speed, what mass will the vehicle appear to have?? a. 3953kg b. 900kg c. 3125kg d. 1601kg Which of the following is not proof of the theory of relativity? a. Gravitational lensing around stars. b. Muons reaching the earth’s surface c. Twin Paradox d. Flight tests around the world using atomic clocks
- How much work must be done on an electron to accelerate it from rest to a speed of 0.892c? Number 0.6215 Units JHow much work is required to accelerate a proton from rest up to a speed of 0.998c?If a m = 81.1 kg person were traveling at v = 0.980c, where c is the speed of light, what would be the ratio of the person's relativistic kinetic energy to the person's classical kinetic energy? kinetic energy ratio: What is the ratio of the person's relativistic momentum to the person's classical momentum? momentum ratio:
- The length of a moving spaceship is 27.4 m according to an astronaut on the spaceship. If the spaceship is contracted by 16.4 cm according to an Earth observer, what is the speed of the spaceship? cElectromagnetic radiation from a star is observed with an earth-based telescope. The star is moving away from the earth with a speed of 0.590c. If the radiation has a frequency of 8.64 x 10 Hz in the rest frame of the star, what is the frequency measured by an observer on earth? a) Of = 4.39 x 1014 Hz b) Of = 4.93 x 1014HZ c)Of = 4.45 x 1014 Hz d) Of = 4.39 x 1015 Hz e) Of = 4.69 x 1014 HzIf a m = 87.5 kg person were traveling at v = 0.992c, where e is the speed of light, what would be the ratio of the person's relativistic kinetic energy to the person's classical kinetic energy? kinetic energy ratio: What is the ratio of the person's relativistic momentum to the person's classical momentum? momentum ratio:
- A particle has a rest mass of 7.15×10−27 kg and a momentum of 5.56×10−18 kg·m/s. Determine the total relativistic energy E of the particle. Find the ratio of the particle's relativistic kinetic energy K to its rest energy ?rest.How much work must be done to accelerate an electron to accelerate it from rest to a speed of 0.902c?What is the kinetic energy of an electron if its speed is 0.992c?