Which statement is correct about the parts of an atom? *

A) protons and neutrons have a positive charge and electrons have a negative charge
B) protons have a positive charge while electrons and neutrons have a negative charge
C) neutrons have no charge, protons have a positive charge, and electrons have a negative charge
D) neutrons have a negative charge, protons have a positive charge, and electrons are neutral

When applying kirchhoff's rules, one of the essential steps is to mark each resistor with plus and minus signs to label how the electric potential changes from one end of the resistor to the other. the circuit in the drawing contains four resistors, each marked with the associated plus and minus signs. however, one resistor is marked incorrectly. which one is it?

Does heating a metal wire increase or decrease its electrical resistance? why?

Abeverage can is made of 3004-h19 aluminum alloy (elastic modulus 69 gpa, tensile yield strength 285 mpa, density 2.72 g/cm^3). the dimensions on the can are approximated as a thin-walled cylinder with a height of 4.83 inches, diameter of 2.60 inches. empty the can has a mass of 14.2 g. determine: a. the wall thickness of the cylinder b. assuming a pinned-pinned condition what is the critical load? c. assuming a fixed-fixed condition what is the critical load?