Hii guys could you please help me with an assignment?? i have a couple of i know questions!! thank you for helping me, hehe. tenise can run the 100 meter dash in 9.77 seconds. what is her speed??

Which two particles are found in the center of an atom

The substances that are necessary for producing of certain hormones and that store and transport vitamins

Consider two less-than-desirable options. in the first you are driving 30 mph and crash head-on into an identical car also going 30 mph. in the second option you are driving 30 mph and crash head-on into a stationary brick wall. in neither case does your car bounce off the thing it hits, and the collision time is the same in both cases. which of these two situations would result in the greatest impact force?