Questions

Robert Brown, Scottish botanist, Discovered The Nucleus of a Cell in 1831, London. When Brown was studying orchids under microscope when he observed an opaque area, which he called the "Areola" or "Nucleus", in the cells of the flower's outer layer.

The nucleus was also described by Franz Bauer in 1804 but in detail Robert Brown made it in 1831.

When traveling in a vacuum, electronic waves from the electromagnetic spectrum all travel at the same speed. Velocity is speed with direction, so they would all travel at the same velocity, realtively speaking. But frequency and wavelength are quite different.

Tamralipti

Most of the water in the body will be lost by kidneys in the form of urine.

Overhead costs should be figured into the cost estimate. Desired profit considered together with other factors such as market demand, availability of resources, prior experience are then used to determine the optimal price.