Tony walks at an average speed of 70 m/min from his home to school. If the distance between his home and the school is
2100 m, how much time does it take for Tony to walk to
school?
min

Two identical 82 mg dust particles very far apart (pee 0) are moving directly toward each other at a speed of 3698 m/s. the charge on each is-719 ? c. determine how close they will get to each other. let k = 9x109 n-m2/c2 & ignore gravity.

Heterogeneous mixture with larger particles that never settle is

Atemperature inversion can cause a warm air mass to move over a colder air mass. this traps the colder air mass and prevents surface air from rising. this may result in which of these? a) smog b) acid rain c) freezing rain d) a thunderstorm