the level of water in a measuring cylinder rises from 50centimeterscubic to55.7cm3 when a metal block weighing 45g is submerged in water cylinder a)calculate density of meter blockb)state two differences between density and relative density

•• 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?

What is a neurotransmitter involved in mood reward, addiction, and motor behaviors?

The law of the conservation of momentum says that the total momentum of any closed and isolated system cannot