Which of the following is the number 0.02204 written in scientific notation?
o a. 2.240 x 10-3
o b. 2.204 x 10-1
o c. 2.204 x 102
od. 2.204 x 102

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?