Question 1 An atom of magnesium and two atoms of chlorine react and yield the compound of magnesium chloride. Which option represents this scenario as a chemical equation? 2Cl → → Mg + MgCl2 2Cl right arrow Mg + MgCl2 Mg + 2Cl → → MgCl2 Mg + 2Cl right arrow MgCl2 MgCl2 → → Mg + Mg + Cl MgCl2 right arrow Mg + Mg + Cl Mg → → 2Cl + MgCl2 Mg right arrow 2Cl + MgCl2 MgCl2 → → Mg + 2Cl

(2) (a) you have a simple circuit that consists of only a battery (δvbat=1.5v) and two resistors with resistance r1=10ω and r2=5ω, connected in series with each other. what is the current running through the battery? (b) you re-arrange your circuit so now r2 is attached in parallel to r1 rather than in series. what is the current running through the battery? (c) you add an additional resistor r3=7ω on the same branch as r2. what is the current running through the battery? (d) what is the power dissipated in r3?

Ineed this now one scientist feels that the changes in global climatic patterns may be good for the health of the biosphere. another scientist feels that sharp changes in climatic patterns could result in the extinction of the biosphere. which of these is the most likely reason the two scientists gave conflicting opinions on the impact of changes in the global climatic pattern? they do not have enough knowledge on the topic. they did not discuss the issue among themselves. they believe conflicting opinion strengthens science. they study different areas of science and have different scientific focuses.

A15,000 kg rocket traveling at +230 m/s turns on its engines. over a 6.0 s period it burns 1,000 kg of fuel. an observer on the ground measures the velocity of the expelled gases to be −1,200 m/s.