Apositively charged particle moves through an electric field. as part of a complicated trajectory, the particle passes through the points a and b. the electric potential of the two points is such that vb > va. the electric force is the only force acting on the particle. what can be deduced about the speed, v, of the particle at the two points?

(a) the speed is equal at the two points.
(b) the speed is larger at a than at b.
(c) the speed is larger at b than at a.

The lid of a pressure cooker forms a nearly airtight seal. steam builds up pressure and increases temperature within the pressure cooker so that food cooks faster than it does in an ordinary pot. the system is defined as the pressure cooker and the water and steam within it. if 2.0 g of water is sealed in a pressure cooker and then vaporized by heating, and 5127 j must be added as heat to completely vaporize the water, what is the change in the system’s internal energy? answer in units of j.