4. calculate the energy change that would accompany an electronic transition in a hydrogen atom from n = 2 to n = 3 shell. determine whether radiation is absorbed or emitted during this transition. (rh = 2.18 x10 -18 j)

Aquantity of gas has a volume of 1.5 m3 and an absolute pressure of 95 kpa. when the gas is compressed to a volume of 0.5 m3, what is the new absolute pressure of the gas? (assume that there’s no change in temperature.)

You are a sales representative for a company that makes a new alternate fuel for vehicles. you have prepared a presentation for the environmental engineers to sell your new product. what question do you expect the audience to ask regarding whether the new fuel will cause less damage to the environment? a. do we have to change any parts of the vehicle to use this alternate fuel? b. will the vehicles get better fuel mileage with the alternate fuel? c. how much greenhouse gas does your fuel produce compared with current fuel sources? d. is the alternate fuel more expensive than fossil fuel?

When a light bulb shines, it gives off light energy and energy. a. heat b. potential c. chemical d. electrical