2. GMAW power sources have a sloping voltage curve. The curve should slope
when carbon dioxide (CO2) gas is used.
A. 4V to 5V
B. 3V to 4V
C. 2V to 3V
D. 1.5V to 2V

What is the earliest point in the universe that we can observe? why can’t we see back further than this?

Aplane travels 1000 miles in 5 hours .what is the planes average speed?

An insulated 40 ft^3 rigid tank contains air at 50 psia and 120°f. a valve connected to the tank is now opened, and air is allowed to escape until the pressure inside drops to 25 psia. the air temperature during this process is kept constant by an electric resistance heater placed in the tank. determine the electrical work done during this process.