Physics, 09.03.2020 04:19 jsndbdbsbsj
A force of 100. newtons is used to move an object a distance of 15 meters with a power of 25 watts. Find the time it takes to do the work.
Answers: 3
Physics, 21.06.2019 17:10
Space-time metric ds2= -dt2+at2dx2+bt2dy2+ct2dz2 (a)how does the area of a rectangle with vertices at ( x=0, y=0, z=0 ), (1,0,0 ), ( 0,1,0 ) and (1,1,0 ) changes with time? (b) if a photon moving in the x direction starts from the origin at t=1, when does it reach x=l? (ds=0 for the trajectory of a photon.) (c) the proper time for a particle is defined by cd=ds. what is the proper time for a particle to move along the trajectory ( x(t)=t, y(t)=0, z(t)=0 ) from t=0 to 1 ? what is the condition on the parameter a so that the velocity of the particle never exceeds the speed of light ?
Answers: 2
Physics, 21.06.2019 20:00
Which of the following represents an upright image? a. -do b. +m c. -m d. +do
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A force of 100. newtons is used to move an object a distance of 15 meters with a power of 25 watts....
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