A student is attempting to design a simple generator that is capable of generating the greatest amount of electric current. He created four prototypes each with a different number of turns of wire. Two of the prototypes used strong magnets and the other two used weak magnets. He tested each prototype by rotating the magnets inside the turns of wire and measured the current generated by each prototype. ASAP

An astronaut in space cannot use a scale or balance to weigh objects because there is no gravity. but she does have devices to measure distance and time accurately. she knows her own mass is 77.4 kg , but she is unsure of the mass of a large gas canister in the airless rocket. when this canister is approaching her at 3.50 m/s , she pushes against it, which slows it down to 1.30 m/s (but does not reverse it) and gives her a speed of 2.60 m/s . what is the mass of the canister?