White light falls on a yellow filter, if:

(a) A green filter is placed behind a yellow filter, what is the colour of the light that will emerge from the green filter?

(b) A blue filter is placed behind a yellow filter, what is the colour of the light that will emerge from the blue filter?

(c) A magenta filter is placed behind a yellow filter, what is the colour of the light that will emerge from the magenta filter?

(d) In all cases give reasons for your answer.

The ultracentrifuge is an important tool for separating and analyzing proteins. because of the enormous centripetal accelerations, the centrifuge must be carefully balanced, with each sample matched by a sample of identical mass on the opposite side. any difference in the masses of opposing samples creates a net force on the shaft of the rotor, potentially leading to a catastrophic failure of the apparatus. suppose a scientist makes a slight error in sample preparation and one sample has a mass 10 mg larger than the opposing sample. if the samples are 12 cm from the axis of the rotor and the ultracentrifuge spins at 70,000 rpm, what is the magnitude of the net force on the rotor due to the unbalanced samples? ( be thorough on your answer)

Aforce of 100 newtons is used to move an object a distance of 15 meters with a power of 50 watts. find the work dine and the time it takes to do the work

The frequency of the fundamental of the guitar string is 320 hz. at what speed v do waves move along that string?