Question

1. what sizes of alkaline battery can you typically buy at the store? (give at least one size )
2. the batteries most used in electric cars these days are this type
3. the new batteries that our vex robots will use are this type
4. the type of battery used in a gasoline car (starter battery) is this type
5. what kind of energy is stored in a battery?
6. what is the biggest risk when using a lithium ion battery?

Explanation:

1. Common alkaline - battery sizes include AA, AAA, C, D, and 9 - volt. AA and AAA are very popular for small electronics.
2. Lithium - ion batteries are widely used in electric cars due to their high energy density and long - cycle life.
3. VEX robots often use rechargeable nickel - metal hydride (NiMH) batteries.
4. Lead - acid batteries are commonly used as starter batteries in gasoline cars because they can provide high current for a short time.
5. Chemical energy is stored in a battery. During discharge, a chemical reaction occurs to produce electrical energy.
6. The biggest risk when using a lithium - ion battery is thermal runaway, which can lead to overheating, fire, or explosion under certain conditions like overcharging, physical damage, or manufacturing defects.

Answer:

1. AA
2. Lithium - ion
3. Nickel - metal hydride (NiMH)
4. Lead - acid
5. Chemical energy
6. Thermal runaway