You might challenge the assertion that batteries are inexpensive energy converters. Calculate the price per kWh for a 12-volt automobile battery with a 50 amp-hour capacity that sells for 40$. If its weight is 45 lb, what is the energy density in watt-hours per lb

The price per kWh is

The energy density in watt-hours per lb is

Explanation:

From the question we are told that

 The voltage of the battery is  

 The capacity of the battery is  

 The  price is  

 The weight of the battery  is  

Generally the energy generated by the battery is mathematically represented as

Here  P is power which is represented as

So

=>  

=>  

=>  

converting to  kW h

=>        

=>    

Generally the cost of this energy produced is    Hence the cost of  1 kWh  is mathematically represented as

=>  

=>  

Generally the energy density is mathematically represented as

=>    

=>    

6/12=1/2

step-by-step explanation:

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