A gas has an initial volume of 21.7 L at a pressure of 0.4 atm and a temperature of 252 K. The pressure of the gas increases to 2 atm as the temperature increases to 323 K. What is the final volume of the gas? 3.4 L 5.6 L 8.5 L 11.1 L

the final volume of the gas is 5.56 L

Explanation:

The computation of the final volume of the gas is as follows:

Here we presume that gas is an ideal gas

So we use the following equation

PV = nRT

P1V1 ÷ T1  = P2V2 ÷ T2

V2  = P1V1T2 ÷ T1P2

V2 = 0.4(21.7)(323) ÷ 252 (2)

V2 = 5.56 L

Hence, the final volume of the gas is 5.56 L

the minimum amperage that the current in this wire would have to have so that its weight is completely supported by the magnetic force due to earth's field, assuming that no other forces except gravity act on it

answer: 2×10^-2kg

explanation: density= mass per volume

vol=mass/density

converting to s.i units we have;

3÷1000kg = 0.003

1.5÷100m = 0.15

0.003/0.15 = 0.02kg