Consider a thought experiment. You place an expanded balloon of air on weighing scales outside in the early morning. The balloon stays on the scales and you are able to measure changes in its mass. Does the mass of the balloon change as the day progresses? Discuss the difficulties in carrying out this experiment.
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- An observer in a coasting spacecraft moves toward a mirror at speed v relative to the reference frame labeled S in the figure below. The mirror is stationary with respect to S. A light pulse emitted by the spacecraft travels toward the mirror and is reflected back to the spacecraft. The spacecraft is a distance d from the mirror (as measured by observers in S) at the moment the light pulse leaves the spacecraft. Mirror S (a) What is the total travel time of the pulse as measured by observers in the S frame? (Use the following as necessary: c, d, and v.) At = (b) What is the total travel time of the pulse as measured by observers in the spacecraft? (Use the following as necessary: c, d, and v.) At =A muon is created at an accelerator experiment. It moves with a spe0.95c. The muon mass is1.90×10−28 kg. What is its momentum? A.1.20×10−19 kg m/s B.1.73×10−19 kg m/s C.2.88×10−19 kg m/s D.3.59×10−19 kg m/s ( Please type answer note write by hend )The lifetime of a free neutron is 886 s. If a neutron moves with a speed of 2.57 ✕ 108 m/s relative to an observer in the lab, what does the observer measure the neutron's lifetime to be (in s)?
- The half‑life of a certain subatomic particle at rest is about 1.00×10−8 s. With what speed V is a beam of these particles moving if one‑half of them decay in 4.00×10−8 s as measured in the laboratory? V = ? m/sTwo atomic clocks are synchronized. One is placed on a satellite which orbits around the earth at high speeds for a whole year. The other is placed in a lab and remains at rest with respect to the earth. You may assume both clocks can measure time accurately to many significant digits. a)Will the two clocks still be synchronized after one year? b) imagine the speed of light is much lower than its actual value. How would the results of this experiment change if the speed of light was only twice the average speed of the satellite? Explain your reasoning using a calculation.