J. j. thomson and ernest rutherford would agree that
a. neutrons exist in the nucleus.
b. atoms have more protons than electrons.
c. protons and electrons exist in the nucleus.
d. protons and electrons have different charges.

Aball is thrown upward in the air, and its height above the ground after t seconds is h ( t ) = 57 t − 16 t 2 feet. find the time t when the ball will be traveling upward at 14.25 feet per second.

Glass has a hardness that is in the middle of the hardness scale. what is the hardness of glass?

Students in an introductory physics lab are performing an experiment with a parallel-plate capacitor made of two circular aluminum plates, each 11 cm in diameter, separated by 1.0 cm. how much charge can be added to each of the plates before a spark jumps between the two plates? for such flat electrodes, assume that value of 3×106n/c of the field causes a spark.