Calculate the resistance by the graph. ezplain fast​

An observer that stands still as the electron moves by him, will observe

In the first law of thermodynamics, triangle e=q-w, what does q stand for

Students design a model roller-coaster track. they place a rubber ball at the highest point on the track and let it go. the ball rolls along the track pulled only by the force of gravity. eventually, it comes to a stop. which change to the design will result in the ball moving the greatest distance?