A12-v battery maintains an electric potential difference between two parallel metal plates separated by 10 cm. what is the electric field between the plates? a. 1.2 v/m b. 12 v/m c. 120 v/m d. zero

Modern atomic theory states that the atom is a diffuse cloud of surrounding a small, dense nucleus. a) electron b) neutron c) proton d) quark eliminate

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 ?

The long handle on a rake is a(n) a. lever b. screw c. wedge d. inclined plane