In an experiment to determine the acceleration due to gravity, one student drops a tennis ball out of the school's third floor window. Another student starts a timer when the first student lets go and stops the timer
when the ball hits the ground. They conduct the experiment once and record the data. Is this a valid
experiment, why or why not?
A. Yes it is valid
B. No, it is not valid because they did not have any repeat trials.
C. No, it is not valid because they are only dropping one item.
D. No, it is not valid because the short distance means there will be a lot of error due to the student's reaction time.

equal distribution i think.

as the gila monster consumes the eggs or young of the desert cottontail and gambel's quail, thus its main food supply is only accessible for a restricted time duration every year. however, for this, the gila monsters exhibit three adaptations, which elevate their survival rate in the desert condition.  

first, is that they possess huge bodies, and can consume greater concentrations of food during a small period. secondly, they require to feed infrequently as they can accumulate fat in their tails. ultimately, their rate of metabolism is very low, so that they can burn their reservoirs of fat gradually.  

answer; both surfaces of the membrane are nonpermeable