Conduction This is the way heat transfers through . When the particles near the heat source heat up, they get

more and start to more. They with the other particles and

pass energy to them. Then these paticles start to move more and with the other particles. This

process continues until all the particles have the same energy and the whole objecvt is the same .

Convection

This is the way heat transfers through and . The particles are near the heat source

heat up and start to move more. They more from the other particles, so this part becomes less

. Because it is less dense, it . Cold particles move to fill the

that is created. Then they heat up and , cool down and , heat up and

cool down and . This is calleda convection.

Radiation

This is how heat trasnfers without physical . It is how the ’s energy

reaches us on Earth or how we feel the heat of a without touching it for example

Matter is needed to transfer thermal energy bya. conductionb. convectionc. radiation d. both a & b.

Amajor impediment to wide acceptance of electric vehicles even on the part of people who use their cars almost exclusively for commuting is the inability to use their electric vehicles for occasional extended trips. in an attempt to make purchasing electric vehicles more attractive to commuters, one electric vehicle producer is planning to offer customers three days free rental of a conventional car for every 1,000 miles that they drive their electric vehicle. which of the following, if true, most threatens the plan's prospects for success? (a) many electric vehicles that are used for commercial purposes are not needed for extended trips. (b) because a majority of commuters drive at least 100 miles a week, the cost to the producer of making good the offer would add considerably to the already high price of electric vehicles. (c) the relatively long time it takes to recharge the battery of an electric vehicle can easily be fitted into the regular patterns of car use characteristic of commuters. (d) although electric vehicles are essentially emission-free in actual use, generating the electricity necessary for charging an electric vehicle's battery can burden the environment. (e) some family vehicles are used primarily not for commuting but for making short local trips, such as to do errands.

If we compare and contrast the three seen in the jar , the best explanation would be that