Physics, 19.08.2021 04:20, Jazzy4real
You are at rest (in the Earth frame) on your balcony, enjoying a rare San Diegothunderstorm. Suddenly, lightning strikes a tree which is only 85 m away from you, giving you quite a scare. This causes you to to jump in fright, when the sound reachesyou, 0.25 s (250 ms) later. A spaceship flying toward you and the tree happens to witness these two events, but they measure the distance between you and the tree to be only 40 m.
a. Describe the possible cause-and-effect relation between the two events, or lack thereof.
b. Calculate the spacetime interval between these two events. What type of separa- tion (spacelike, timelike, or lightlike) do these events have? Does this agree with your answer to (a)?
c. Using the invariance of the spacetime interval between inertial reference frames, calculate the amount of time between the two events that the observer in the spaceship measures. What is the order of events that they observe?
Answers: 3
Physics, 22.06.2019 09:40, goofy44
Aturntable a is built into a stage for use in a theatrical production. it is observed during a rehearsal that a trunk b starts to slide on the turntable 10 s after the turntable begins to rotate. knowing that the trunk undergoes a constant tangential acceleration of 0.31 m/s2, determine the coefficient of static friction between the trunk and the turntable.
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Two steel balls, each of mass m, are welded to a light rod of length l and negligible mass and are initially at rest on a smooth horizontal surface. a horizontal force of magnitude f is suddenly applied to the rod as shown. determine (a) the instantaneous acceleration a of the mass center g and (b) the corresponding rate at which the angular velocity of the assembly about g is changing with time.
Answers: 2
Physics, 22.06.2019 22:00, perezsamantha3oqr0za
Ahurricane sweeps across the ocean and damages the houses of people living along the coast. which of these does not play any role in this interaction? air water glaciers living things
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You are at rest (in the Earth frame) on your balcony, enjoying a rare San Diegothunderstorm. Suddenl...
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