In a certain region, the electric potential due to a charge distribution is given by the equation V( x, y,z) = 3 x 2 y 2 + yz 3 - 2 z 3 x, where x, y, and z are measured in meters and V is in volts. Calculate the magnitude of the electric field vector at the position ( x, y,z) = (1.0, 1.0, 1.0). -8.1 V/m 8.6 V/m 74 V/m 4.3 V/m 2.0 V/m

Henry, whose mass is 95 kg, stands on a bathroom scale in an elevator. the scale reads 830 n for the first 2.4 s after the elevator starts moving, then 930 n for the next 2.4 s. part a what is the elevator's speed 4.8 s after starting? express your answer with the appropriate units.

In science and physics what is the standard unit of measure for speed?

I'm thinking it's 2 you are asked to explain the earth's magnetic field. which is the best reply? 1. the earth's magnetic south is similar to the north pole of a magnet. 2. the earth's core has a strong magnetic charge similar to the south pole of a magnet. 3. the earth's geomagnetic south is similar to the south pole of a magnet. 4. the earth's magnetic charge is not centered at either pole; it varies based on location.