Four liters of helium are released into a weather balloon at sea level (pressure 101.3 kPa). To what volume does the balloon expand as it rises to an altitude of 20 km (pressure = 8
kPa)?

Engineers have contribute to society in many ways like making the technology we use today or any type of power energy material

500bc indiais the answer.

The answer is the first option just took the test

Any vitamins or supplements can be obtained without prescription and are widely used as alternative from western medications. most supplements are not valued by the fda or any other drug and food agencies.