Iguess we're not allowed to post more then one so here is one of them for my if you answer them all it'll be like 100 for the following questions, use a periodic table and your atomic calculations to find the unknown information about each isotope: you have a helium isotope with 2 neutrons. what is the mass number? 2 4 4.0026 6

For general projectile motion, when the projectile is at the highest point of its trajectory, its acceleration is zero? a)the horizontal and vertical components of its velocity are zero. b) its velocity is perpendicular to the acceleration. c)the horizontal component of its velocity is zero. d)its velocity and acceleration are both zero.

What are chlorofluorocarbons and what impact do they have on the atmosphere?

An automobile steering wheel is shown. what is the ideal mechanical advantage? if the ama is 8, what is the efficiency of the steering wheel?