Astudent is collecting data about the hardness of mineral samples. he wants to display the hardness of each sample on a scale of 1 to 10. the best choice for displaying his data would be

Explain why electric current cannot exist if a current doesn't have a voltage source.

Uppose we consider the system of the three capacitors as a single "equivalent" capacitor. given the charges of the three individual capacitors calculated in the previous part, find the total charge qtot for this equivalent capacitor. express your answer in terms of v and c.

In a heat engine if 1000 j of heat enters the system and the piston does 500j of work, what is the final internal energy of the system if the inital energy was 2000 j1.write the equation2.list out your known variables 3. plug the numbers into the equations4.solve 5.write your solution statement that includes initial energy and final energy added.