Recent content by Justhelp

I can't use distance or time because the numbers I got were for 2.7s.

But..I don't have time.

Using d=rt?

I should also say that the number I got for what his kinetic energy after falling for 2.7s is not listed either. I just do not have anyone to compare my work with currently.

How long would it take... Homework Statement This is a problem that followed a bunch of others so I will post what I got for those as well. Here is the problem: How long would it take Kirk to fall to the valley floor? 5.29s or 3.47s or 11.836s or 2.43s or none of those. I am not getting any...

or is it convection?

When heat is transferred by passing vibrations from one atom to another, it is called conduction or radiation? I know it's def. not convection. Thank you

Question 2 The lowest temp. is? 0 degrees C -273 degrees F 0 degrees K 32 degrees K -100 degrees K The internet tells me that 0 degrees celsius is the coldest and that 0 Kelvin is too...

I have another question.

Homework Statement A 10kg copper mass at a temperature of 450 degrees K is pushed up against another copper mass of 8kg at a temperature of 480 degrees k. How will the heat be transferred? I know it won't be transferred from hot to cold.. or would it be? does mass matter and or the material...

I have to right now. Thank you for any further help.

The choices are violating Newtons 1st, 2'd, or 3rd law or no gravity on the moon or the question is in error. I think the 2'd law because accel=net force/ mass, accel. would be low enough the bird could not fly? I am still thinking.

No, the bird would not be able to fly. Violating Newtons second law then?

By air.. And there is no wind resistance from what I concluded with in the other problem..

Here is another, a feather and a coin are dropped on the moon from the same height which hits sooner? I know I have to take the moon's gravity into account. Is there a formula to solve this? I'd like to think they would drop at the same time because of no wind resistince?