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Unformatted text preview: ( x ) = e 2 x Â· 2 23 . 6. The voltage, V , in volts, in an electrical outlet is given as a function of time, t , in seconds, by the function V = 115 cos(270 Ï€t ). Give the expression for the rate of change of voltage with respect to time in units of volts per minute. We compute the rate of change, V â€² ( t ): V â€² ( t ) = 115(-sin(270 Ï€t )) Â· 270 Ï€. Since v is in volts and t is in units of seconds, V â€² ( t ) is in units of volts/second. To get volts/minute, we multiply by 1 = (60 seconds)/(1 minute), and the desired rate is 115(-sin(270 Ï€t )) Â· 270 Ï€ Â· 60 volts/minute....
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This note was uploaded on 02/07/2010 for the course AMS 151 taught by Professor Zhang during the Fall '08 term at SUNY Stony Brook.
- Fall '08