A uniformly charged thin ring has radius 13cm and total charge 24.0 pC. An electron is placed on the rings acis a distance 26.0cm from the center of the ring and is constrained to stay on the acis of the ring. The electron is then released from rest. What is the initial electric potential of the electron at the moment of release? What is the electric potential energy of the lectron at the center of the ring?
Find the speed of the electron when it reaches the center of the ring (ignore gravity)

Asmall metal bar, whose initial temperature was 10° c, is dropped into a large container of boiling water. how long will it take the bar to reach 70° c if it is known that its temperature increases 2° during the first second? (the boiling temperature for water is 100° c. round your answer to one decimal place.) sec how long will it take the bar to reach 98° c? (round your answer to one decimal place.)

Mass (kg) force (n) 5 25 10 50 15 75 20 100 a student was trying to find the relationship between mass and force. he placed four different masses on a table and pulled them using a spring scale. the table shows the different masses used in the experiment and the force required to pull each mass. the student concluded that more force was required to pull heavier objects. what comment would you make regarding his conclusion? a) no clear relation can be observed between mass and force from the data. b) there is a direct proportion between the mass and force listed in the table. c) gravity should have been taken into account while performing the experiment. d) there is an inverse proportion between the mass and force listed in the table.

How is zig zagging a form of acceleration?