Aparticle moves along the x axis according to the equation x = 2.00 + 3.00 t – 1.00 t2, where x is in meters and t is in seconds. at t = 3.00 s, find (a) the position of the particle, (b) its velocity, and (c) its acceleration.

Currents in dc transmission lines can be 100 a or higher. some people are concerned that the electromagnetic fields from such lines near their homes could pose health dangers. for a line that has current 150 a and a height of 8.0 m above the ground, what magnetic field does the line produce at ground level? express your answer in teslas and as a percentage of the earth’s magnetic field, which is 0.50 g. is this value cause for worry?