while in safari, a tourist witnessed a 200 kg lion chasing down an 800 kg water buffalo, and eventually the lion jumping and grabbing on to the buffalo. Before collision the lion was running behind the water buffalo at 20.m/s and the buffalo running away from the lion at 25 m/s. What is the combined speed of the lion and the buffalo after collision?

•• al and bert are jogging side-by-side on a trail in the woods at a speed of 0.75 m/s. suddenly al sees the end of the trail 35 m ahead and decides to speed up to reach it. he accelerates at a constant rate of 0.50 m/s2, while bert continues on at a constant speed. (a) how long does it take al to reach the end of the trail? (b) once he reaches the end of the trail, he immediately turns around and heads back along the trail with a constant speed of 0.85 m/s. how long does it take him to meet up with bert? (c) how far are they from the end of the trail when they meet?

Which of the following is not a part of the respiratory system? a. pharynx b. trachea c. pancreas d. larynx

Which is the correct symbol for an isotope of iodine with 53 protons and 78 neutrons?