After walking across a carpeted floor in socks, jim brings his finger near a metal doorknob and receives a shock. what does that demonstrate

electric forces can act at a distance.

When Jim walked across the carpeted floor, his body gained electrons from the carpet. The presence of these electrons generated a force between his finger and the doorknob. Since he did not need to actually touch the doorknob for the electrons to be pulled from his finger, this demonstrates that electric forces can act at a distance.

weather forecasts are done by collecting data about the current state of the atmosphere mainly the temperature, humidity and wind and using meteorology, to determine the atmosphere that evolves over time. the h and l mean the high and low pressure. the red strip is a warm front. the blue strip is a cold front. the blue and red strip is a stationary front. the purple strip is a occluded front.

explanation:

dopamine..

"it was found that some people who were taking the drug l-dopa to raise their levels of dopamine were developing schizophrenic-like symptoms supporting research a strength of the dopamine hypothesis is that there are many studies which have shown support for the neurochemical explanation."