You get actually energy (Watts) out of a battery, not calories (which is food energy).
More to the point, how many joules can one get out of a typical 9V battery. This varies somewhat depending upon the load. At low drain currents, (2mA), a typical manganese alkaline 9V battery will provide around 16,000J over its lifetime, assuming it starts out fresh and is discharged to 1V per cell. One can squeeze out a little - not much - more if you run it down to completely dead. At a 10mA draw, you drop down below 15,000J, at 100mA, only about 12,000J. The above is based on discharge curves for Duracell MN1604
There are 3.6 million joules in one kilowatt-hour (kWh).
There are approximately 155 calories in 650 joules. One calorie is equivalent to about 4.184 joules.
It is approx 3.82*10^26 Joules.
The equivalent of about 6,330,000,000 joules or 6 million BTUs
That depends on the voltage. In general, a coulomb of charge will either gain or lose (depending on the direction) one joule of energy for every volt of potential difference. For example, if the battery has 12 V, a coulomb of charge will gain or lose 12 joules of energy when going from one terminal to the other.
One ton of coal produces approximately 24 million joules of energy when burned.
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The amount of electrical energy generated by a nuclear power reactor in one day can vary depending on its capacity and efficiency. However, a typical nuclear power reactor can generate around 1-2 billion joules of electrical energy per day.
One degree Celsius is equal to one calorie, which is equivalent to 4.184 joules.
1 calorie = 4,18400 joules
One foot-pound of force equates to about 1.355818 joules.