Answer:
(e) the same as the field found by B
Explanation:
Stationary charge produce same electric field at a particular location irrespective of the magnitude of the test charge. Electric field produced by a stationary charge "q" at a distance "r" from it is given as

so the correct choice is given as
(e) the same as the field found by B
Density is the best property to use, as while multiple different metals could create cubes with the same color, mass, or volume, no different metal could create a cube with the same mass and volume. Density is based on mass and volume, and as a result no two different metals will have the same density.
Answer:
a) 5000
b) 40m/s this is the right answers
Explanation:
but no so so sure