Air flows according to differences in thermal energy.

If a warm air mass is located in the southwest United States and a cold air mass is located in the southeast United States, from which direction will the winds blow?

A) south

B) east

C) north

D) west

Nuclear fusion is the source of energy for stars. besides hydrogen, which other element is most likely also common in stars?

Answer asap need by wednesday morning explain how a buffer works, using an ethanoic acid/sodium ethanoate system including how the system resists changes in ph upon addition of a small amount of base and upon addition of a small amount of acid respectively. include the following calculations in your i. calculate the ph of a solution made by mixing 25cm3 0.1m ch3cooh and 40cm3 0.1m ch3coo-na+. [ka = 1.74 x 10-5 m] ii. calculate the ph following the addition of a 10cm3 portion of 0.08 m naoh to 500cm3 of this buffer solution. iii. calculate the ph following the addition of a 10cm3 portion of 0.08 m hcl to 200cm3 of the original buffer solution.

Which material burns faster? metal aluminum