Dfgre Regerg
New member
...exhausted after 5hr.qstions below? a stereo has a 20 watt sound output. the batteries store 400k J of energy. the batteries are exhausted after 5hr.
How much energy has the stereo usefullt gven out ??
What is the effenciency ??
How much energy has been wasted ??
would the batteries last longer if used as the radio rather than cd player ??
How much energy has the stereo usefullt gven out ??
What is the effenciency ??
How much energy has been wasted ??
would the batteries last longer if used as the radio rather than cd player ??