Cuál fue el aporte en escritura arquitectura y pintura de los egipcios​

How is sound energy produced a. vibrating objects b. objects being heated c. temperature differences d. stationary objects

Abar magnet cut in half will form a total ofpoles.a)fourb)eightc)two

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?