Factual error: When they first power-up the Stargate in the military facility (using Jackson's decryption), the thing surges to life, and electrical sparks spray out of overloaded connections all around the control room. This could only happen if there were no fuses or electrical breakers in the military's control system, which is a ridiculous notion for such advanced military technology. In real life, a powerful overload situation would instantly burn out fuses and trip breakers and the whole system would simply go dead (there would be no sparks). Showers of sparks are a common error in many science fiction and space fantasy films dating back many decades.
Suggested correction: If there would be breakers and fuses then yes, the system would simply go dead and then they would have nothing. They intentionally let the system nearly overload because without power they wouldn't be able to finish the sequence.
No, that's not the way sophisticated (and expensive) electronic technology works. If you have sparks spraying out of electrical connectors, that means you're melting down millions and millions of dollars of hardware. No technician or electrician or even a first-year auto mechanic would intentionally design and hardwire an electrical system without fuses and/or breakers.
They're dealing with Ancient technology. It's quiet possible that such an advanced piece of technology as a Stargate could cause powerful arcs of electricity along lines separated even by tripped breakers.
Ancient technology does not override electrical physics. Modern electrical equipment is protected with fuses and breakers for a reason. If the Stargate technology overrode the parameters of the modern equipment, it would melt down the modern components being protected by the fuses and breakers. Either way, the whole system would shut down.
Continuity mistake: After French Stewart throws the suitcase at James Spader, Spader goes down the hill, collecting his books that fell out. However, the suitcase is still closed.
Suggested correction: When he is collecting the books, the suitcase is open. The bottom half is almost completely covered in and filled with sand as it is slowly sliding down the hill as the sand flows.
Other mistake: When the ship lands atop the pyramid and begins to retract and open the topmost sections of the pyramid retract into the lower parts however the upper parts are too long to fit into them. In the next sequence we see the ship and the upper parts are nowhere to be seen.
Suggested correction: Perhaps the parts fold further in on themselves. Like a retractable ladder.
Plot hole: Why does Ra need to wait until the next day to send the bomb back to Earth? If he's got the bomb, and he can turn on the Stargate then what is waiting for? In fact, he could have done that at any point without revealing to Jackson his plan then he wouldn't have been stopped.
Suggested correction: He has to wait as he is planning to also send a shipment of minerals with it. Those minerals must be gathered which takes time.
