An athlete kicks a ball at an angle of 45° and with a speed that gives it a range of 60 m. The ball takes 2.8 s to land. If the athlete kicks another ball with the same speed, but at an angle between 45° and 55°, which of the following must occur the second time compared to the first time?

Which is an example of an exothermic process?

Acharge q experiences no net force at a particular point in space. which of the following situations described below must always be true? -there are no other charges nearby. -if there are other charges nearby, they must all have the same sign as q. -if there are other charges nearby, they must all have the opposite sign of q. -if there are other charges nearby, the total positive charge must equal the total negative charge. -none of the above

Two solutions of the same uv-absorbing molecule were analyzed by uv-vis spectroscopy on the same instrument using 1 cm pathlength cells. use data from the table to calculate by what percentage the concentration of solution b is compared to that of solution a.sample absorbance at 315nm a 0.45 b 0.80