John starts at his locker and walks past his 3rd period class straight to his friends locker that is 27 m away. It takes him 14 seconds to get to his friends locker. After hearing the bell ring, he quickly goes back to his classroom 18 m away in 8 seconds.

Which compound is held together by the electrostatic force between two ions? a. co2 b. cci4 c. h2s d. mgf2

Sort the images based on whether there's a force of attraction or repulsion between the magnets shown. attraction repulsion

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?