Recent content by sameh1

hello i attached my question if i can get some help i think that there is another way to solve this problem

let me tell you something The enthalpy of vaporization, (symbol ΔHvap), also known as the heat of vaporization or heat of evaporation, is the energy required to transform a given quantity of a substance into a gas it is constant for one substance for example water and it is 44 KJ/mol you can't...

i have an easy question i Know how to calculate the slope but how I can get all the equation I know before that the equation is -2x+2 I know how to calculate the slope it is y2-y1/x2-x1 but how can I get +2 I attach a file describing the question

i have propkem solving this equations attempt to solve i looke out in http://www.fsj.uAlberta.ca/CHIMIE/chem161/ReactionsofGrignardReagents.html http://cnx.org/content/m15245/latest/ http://www.chemguide.co.uk/organicprops/haloalkanes/grignard.html...

Thanks a lot I understand the proplem x is AP and I repeat the procedure to know how many time i have a destructive interfernce if there is anything i can help with

hi I tried to do what you told me but it does not help when i calculated n its negative and after i calculate n how can I calculate the distance AP I attached my try to solve the proplem

i really have some proplem with this question Two antennas located at points A and B are broadcasting radio waves of frequency 95.0 MHz, perfectly in phase with each other. The two antennas are separated by a distance d= 9.30 m. An observer, P, is located on the x axis, a distance x= 60.0 m...