Which device or set of devices is contained in a mobile telephone? need answer urgently if possible.

A. transmitter only

B. transmitter and receiver only

C. encoder and decoder only

D. encoder, transmitter, receiver, decoder

The intensity, or loudness, of a sound can be measured in decibels (db), according to the equation , where i is the intensity of a given sound and is the threshold of hearing intensity. what is the intensity, in decibels, [i(db)], when ? use a calculator. round to the nearest whole number. 8 9 19 80

Two polarizers are oriented at 70∘∘ to one another. unpolarized light falls on them. what fraction of the light intensity is transmitted?

In a system, when potential energy decreases, then entropy also decreases. true false