Which of the following describes all of the types of water found in the hydrosphere? ( a) all frozen water on the earth
( b) all of the water found on the surface of the continents
(c)all of the water on the earth
(d) all of the fresh water on the earth
this is on study island

How many grams of naoh are needed to make 0.250 liter of a 0.500 m solution of naoh? 0.125 g 5.00 g 2.00 g

Two friends at different locations want to communicate with each other by sending low energy signals. which of the following methods can they use to communicate? a) produce x-rays using colliding electrons and send them to radios, which capture sound b) send messages using infrared radiation, which travel in the form of waves c) send radio waves through intervening media like radio and television d) produce sound waves using microwaves from heated objects

Evaluate this exponential expression,8. (2 + 3)2 – 42