8.Were there any problems with the experiment or the methods? Did you have any surprising results?Section IV: Conclusions9.What do the results tell you about your hypothesis(es)?10.How do the data support your claim above?11.If you could repeat the experiment and make it better, what would you do differently and why?

Aplane flies directly between two cities, a and b, which are separated by . from a to b, the plane flies into a headwind. on the return trip from b to a, the wind velocity is unchanged. the trip from b to a takes less than the trip from a to b. what is the airspeed of the plane, assuming it is the same in both directions

Atrain departs from its station at a constant acceleration of 5 m/s. what is the speed of the train at the end of 20s?

An object weigh 40n in air ,weigh 20n when submerged in water,and 30n when submerged in a liquid of unknown liquid density.what is the density of unknown of liquid?