The radius of sphere is 12.4+-0.1cm. (a)Calculate the percentage error in radius.
(b) calculate the percentage error in sur the face area of the sphere (A=4πr^2)

Which statement best describes who the period and frequency of electromagnetic was change between gamma rays and microwaves? a) the period and frequency stay the same. b) the period increases and the frequency decreases. c) the period decreases and the frequency increases. d) the period increases and the frequency increases.

How many neutrons does element x have if it’s stormy umber is 33 and it’s mass number is 95?

What would be the result of an alpha particle coming into a magnetic field? a) the alpha particle will stop moving. b) the alpha particle will reverse its direction. c) the alpha particle will be deflected in a curve path. d) the alpha particle will continue to travel in a straight line.