Engineers are developing new types of guns that might someday be used to launch satellites
as if they were bullets. One such gun can give a
small object a forward velocity of 3.5 km/s after
accelerating it for 1.14X10^-5s
a. what acceleration does the gun give this
object?
b. how far does the object travel?

Which term best describes the phrase “something that happens”?

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 ?

Which statement best explains why the overall charge on an atom is zero?