Um tanque rígido contém 2 kg de refrigerante R-22 superaquecido a 20°C e 0,5 MPa.
a) Se o tanque está cheio, qual o volume do tanque;
b) Se o fluido for resfriado para -20°C, qual o título do
refrigerante?
c) Para quais valores de volume específico o refrigerante
deverá ter após o resfriamento para ser um líquido
comprimido? Justifique a resposta

Explain why you think this diagram shows what happened to the carbon in the biodome.

Along wire carrying a 4.2 a current perpendicular to the xy-plane intersects the x-axis at x=−1.7cm. a second, parallel wire carrying a 3.0 a current intersects the x-axis at x=+1.7cm. part a at what point on the x-axis is the magnetic field zero if the two currents are in the same direction? express your answer to two significant figures and include the appropriate units.

What word chemical equation describes cavendish’s experiment with zinc?