In a hydrogen atom, the electron in orbit
around the proton feels an attractive force of
about 8.82 x 108 n.
if the radius of the orbit is 5.27 x 10-11 m,
what is the frequency?
answer in units of rey/s.

Ineed the answers for these promblems i have

Two rigid transformations are used to map δhjk to δlmn. the first is a translation of vertex h to vertex l. what is the second transformation? a reflection across the line containing hk a rotation about point h a reflection across the line containing hj a rotation about point k

Aboat radioed a distress call to a coast guard station. at the time of the call, a vector a from the station to the boat had a magnitude of 45.0 km and was directed 15.0° east of north. a vector from the station to the point where the boat was later found is = 30.0 km, 15.0° north of east. what are the components of the vector from the point where the distress call was made to point where the boat was found? in other words, what are the components of vector c = b - a?