1) a cathode-ray tube is a type of tube.
2) an n-type semiconductor is made by adding a trace amount of phosphorus to
3) communication devices use circuits known as to make them more portable, reliable, and affordable.
4) what solid-state component in a mobile phone maintains proper voltage levels in the circuits? a. transistors b. capacitors c. diodes d. microchips
5.) the electric field around a positive charge points the charge.
6) electric force is proportional to the amount of charge and proportional to the square of the distance between the charges.

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Newton's law of cooling states that the rate of change in the temperature t(t) of a body is proportional to the difference between the temperature of the medium m(t) and the temperature of the body. that is, startfraction dt over dt endfraction equals upper k left bracket upper m left parenthesis t right parenthesis minus upper t left parenthesis t right parenthesis right bracket , where k is a constant. let kequals0.04 left parenthesis min right parenthesis superscript negative 1 and the temperature of the medium be constant, m(t) font size decreased by 3 equivalent font size decreased by 3 294 kelvins. if the body is initially at 369 kelvins, use euler's method with hequals0.1 min to approximate the temperature of the body after (a) 30 minutes and (b) 60 minutes.