What causes fusion to stop within all stars?

The difference between a red shift and a blue shift has to do with wavelength frequency. t or f

Two resistors r1 and r2 may be connected either in series or parallel across an ideal battery with emf ε. we desire the rate of energy dissipation of the parallel combination to be 8.75 times that of the series combination. if r1 = 105 ω, what are the (a) smaller and (b) larger of the two values of r2 that result in that dissipation rate?

Which form of cell division creates the sperm and egg, resulting in half of the chromosomes as the other cells?