The current flowing in an electrical circuit is given by i=3t amperes where t=time in seconds. Determine the charge Q in coulombs passing between t=0 and t=4 seconds.
Note; charge Q=It Coulombs, where I=current in A and t=time in s
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An engine switched off and left to cool naturally will obey Newtons law of cooling.
A particular engine is switched off at 105°C when the ambient temperature is 0°C. Its temperature falls according to the equation T=105e-0.025t °C. Where t=time in minutes.
c) use calculus to determine the...