Symptoms of headache, nausea, dizziness coupled with clammy skin are signs of: Heat Cramps Heat Exhaustion Heat Failure Heat Stroke

Will you chech and finish these for me, because i am stumped with them.

There are two-speed cameras, one in an are where the speed limit is 30 km/h and another where the speed limit is 50 km/h. in which will there be a smaller time interval between the photographs? explain your answer.

In a classical model of the hydrogen atom, the electron moves around the proton in a circular orbit of radius 0.053 nm. what is the electron's orbital frequency? what is the effective current of the electron?