Why is it important that the supernovae being observed, which led to the idea of dark energy, are high z (remember z is another name for redshift) supernovae? high z supernovae are always paired with cepheid star systems, so we can calculate their distances. high z supernovae are brighter than regular supernovae. high z means that the supernovae are far enough away for us to detect changes in the expansion rate. high z supernovae have light redshifted enough to see in the visible spectrum with our telescopes.

what best describes physical development during adolescence is the development of secondary sex characteristics happens at a rate unique to each individual.

the answer is ampere

the ampere is used to measure electricity. an ampere is a unit of electric current equal. a unit of measure for the flow of current in a circuit. one ampere is the amount of current flow provided when one volt of electrical pressure is applied against one ohm of resistance.

find the surface area of the sphere to the nearest square unit. use a calculator.

a. 254 in.2

b. 64 in.2

c. 127 in.2

d. 1,018 in.2