Chieffy Caligdong of the Philippine Azkals kicked a football with an initial velocity of 20.0 m/s at an angle of 60*. Hint: Assume that the ball lands at the same height as its starting position.

a. How long did the ball stay in the air?

b. What are the range and maximum height of the ball?

Helllppp meee master▼・ᴥ・▼

Apeak with a retention time of 407 s has a width at half-height (w1/2) of 7.6 s. a neighboring peak is eluted 17 s later with a w1/2 of 9.4 s. a compound that is known not to be retained was eluted in 2.5 s. the peaks are not baseline resolved. how many theoretical plates would be needed to achieve a resolution of 1.5?

Which of the following observations indicates that there is a small, dense, positively charged part in the center of an atom? some uncharged particles are scattered by a gold foil. all uncharged particles are attracted towards a gold foil. all positively charged particles pass straight through a gold foil. some positively charged particles bounce back from a gold foil.

The arrangement of particles is most ordered in a sample of