un tubo de cobre de 400 g, se encuentra inicialmente a 200 c, se sumerge en un recipiente que contuiene 3 kg de agua de 20 c ¿ cual sera la temperatura de equilibrio de la mezcla?

When using two-wire cable to feed a 240-v appliance that does not require a neutral wire, you should a. mark both ends of the white wire green. b. use the cable as is. c. use only the black wire. d. mark both ends and any exposed area of the white wire black.

The a metal retainer that keeps the rolling elements evenly spaced. n a. seal n b. separator n c. bearing n d outer race

Ineed the answer to question 1 , i’m desperate