Digital television
a. uses a vacuum tube to accept signals and convert them into light and color on the screen.
b. uses a network of stations to transmit signals.
c. provides the illusion of movement by showing a sequence of film over a light source.
d. uses pixels that can be turned on and off.

the results is a decrease in air temperature with an increase of altitude.

explanation:

energy can be converted from one form to another, but it cannot be created or destroyed in ordinary chemical or physical means. do not understand what you are asking but hope this

a=d/t

a="triangle"v/t

explanation:

a = acceleration

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