If wood on concrete has a coefficient of kinetic friction equal to 0.80, how much force is required to move a 200. N wooden box across a concrete sidewalk?

In the reading, yao chen-yuan describes traveling to deliver a message. why was he willing to risk danger to travelto tientsin? he wanted to the boxers with their cause

1. calculate the approximate enthalpy of the reaction in joules. estimate that 1.0 ml of vinegar has the same thermal mass as 1.0 ml of water. iqnore the thermal mass of th sodium bicarbonate. note: it takes about 4.2 joules () to change 1.0 gram (1.0ml) of water 1.0 c

In the reaction between a crushed antacid tablet and vinegar what gas is emitted