A competing technology uses a photovoltaic cell to charge a battery which can then be used to power a LED light. To compare these technologies, we make some reasonable assumptions. We assume the solar cell is 10 cm on a side, and that it has an efficiency of 15%. We assume the battery is a LaNi5 nickel metal hydride rechargeable battery with a mass of 50 grams, and we assume that the battery has an actual specific charge of 50% of its theoretical specific charge. We also assume that the battery produces an average voltage of 1.1 V.
d. How much power (in watts) will be generated by our solar cell if we place it in 1000 W/m2 direct incident sunlight? A: 1.5
How much energy can the solar cell produce during a day that receives the equivalent light of 4 hours of 1000 W/m2 direct incident sunlight, in kJ? A: 21.6
How much energy can the battery store, in kJ?
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Your 1st two answers are correct, but I'm not up on specific charge stuff.
Help on last question!
To calculate the amount of energy the battery can store, we need to know its capacity in watt-hours (Wh). The capacity of a battery can usually be found in its specifications or by doing a quick search online. However, since you haven't provided that information, I cannot provide you with an exact answer.
But fret not! I can guide you through the process and show you how to calculate it yourself. Here are the steps:
1. Identify the capacity of the battery in ampere-hours (Ah) or milliampere-hours (mAh). Often, this information is mentioned in the battery specifications.
2. Convert the capacity into watt-hours by multiplying it with the nominal voltage of the battery. In this case, you mentioned that the battery produces an average voltage of 1.1 V. So, the formula becomes:
Battery Capacity (Wh) = Battery Capacity (Ah or mAh) × Battery Voltage (V)
3. Once you have the battery capacity in watt-hours, which represents the total energy the battery can store, convert it into kilojoules (kJ), which is the desired unit. Remember that 1 Wh is equal to 3.6 kJ.
So, all you need to do is plug the given values into the formula above to calculate the energy stored in the battery.