A scanning tunneling microscope(STM) scans a surface at a distance d=1nm.?

The height of the potential energy barrier is 2eV. If the distance between the surface and the STM tip decrease by 1%, estimate the percentage change in the tunneling current.

Help with quick econ problem please!!?

I don't see a number specified for that POTENTIAL LEVEL so I don't see how you can do the calculation.

On Cloud Nine, With you as mine?

The movie "Cloud Nine" should be great. I have not seen it yet but I will. As I am 64. Is there a "cloud nine" for elderly, widowed Afro-Americans, too?

Help meh all ya'll tough @$$ fighters?

I'm going to start muay thai kickboxing.I've trained in tae kwon do for 4 years and I know it wil be a difficult transition. I have a 100lb punching bag,ankle weights,wood boards i can kick. Ya'll help me come up with a heavy work out plan to help me get ready so i wont get my a$$ kicked lol.Thank you ya'll :->

Blockbuster trade! hugeeeee!?

yes you cant p up the best player in fooball right now. Look on the waiver wire for a Correll Buckhalter or Jamaal Charles type of player.

Older guy always stays to talk to us. Why did he say this? Does he think I've fallen? Or has he got feelings?

i think he is very attracted to you. it sounds to me like he wants to keep things going with you. you both seem to have some attraction there for one another. i would suggest try pursuing things with him and seeing where it goes. he sounds like a good guy who isnt going to play games with you and waste your time. good luck

How come Ethanol disolves but not ethane?

ethanol has an -OH functional group that makes the molecule polar. Water is a polar solvent so it can take the ethanol into solution. Ethane has no polar groups in the structure so it is a non-polar molecule and water cannot dissolve it.