which of the following is are neutral atoms of carbon and which are isotopes of carbon? (carbon has an atomic number of 6 and an atomic mass of 12)

a. neutral: a isotope: b and c

b. neutral: b isotope: a and c

c. neutral: c isotope: a and b

d. neutral: a and c isotope: b

The rigid beam is supported by the three suspender bars. bars ab and ef are made of aluminum and bar cd is made of steel. if each bar has a cross-sectional area of 450 mm2, determine the maximum value of p if the allowable stress is (σallow)st = 200 mpa for the steel and ( σallow)al = 150 mpa for the aluminum. est = 200 gpa and eal = 70 gpa.

Gather reliable information to brent make his decision. to gather this information, use newspapers, call insurance companies or look at their web sites, and review consumer magazines and web sites. also, look at the manufacturer web site or for information about gas mileage. list the sources you use and take notes.

Matter is needed to transfer thermal energy bya. conductionb. convectionc. radiation d. both a & b.