Ahhh...so it's not just me? Maybe there was a typo in this sheet, but that's how the question was phrased. I suppose they mean X is the magnitude of X(vector) for X-A, X-B, and X-C. The first expression (A-B-C) is in vector notation, but the second one (A^2 + B^2 + C^2) is not. I'm not sure if...
Homework Statement
If A-B-C (vectors) and A^2+ B^2+ c^2 where X is the magnitude of X(vector) for X-A,B,C, then the vectors A and B are perpendicular to each other. (True or false?)
Homework Equations
The Attempt at a Solution
Honestly, I never post anything unless I have it at...
Homework Statement
A forensic investigator notes a 7.2g lead bullet stopped in a door frame melted completely on impact. Assuming the bullet was shot at RT (20C) what would the investigator calculate as the minimum nozzle velocity of the gun to be? (C_lead = 130J/kg*C), (L_lead = 2.5*10^4J/kg)...
1. Homework Statement [/b]
The force you exert on the Earth is insignificant compared to the force the Earth exerts on you. (True or false)
The attempt at a solution[/b]
I believe that this is false based upon Newton's third law--shouldn't the forces be equal and opposite?
2. Ice...