If i clock out at 1: 51 what timw do i get in from break

If you have a 30 minute break, then you would clock back in at 2:21

 9 minutes from 1:51 so 2:00 leaving

21 more minutes from your 30 minute total.

i hope this makes sense :)

c)as speed changes, wavelength and frequency change.

everything changes!

radiation warms things up temp rises convection currents air circ windy weather