Suppose that the resistivity (p) of a certain material various with its tem- perature (T) in accordance to the following quadratic equation a(T) p (1 + α(T-T) + β(T-TO)2) with T0 = 20°C and po = 500 nQ-m. Suppose also that the resistivity of this material is found to drop to one half its value at T0 when T1 =-100°C and suppose that the material is found to become superconducting when T2270°C. Determine the resistivity of this material when T 0°C. (a) 154 ns. m (b) 254 n2.m (c) 354 n2 m (d) 454 n2 m (e) 554 ns2 .m (f) None of the above.

the diagram which shows forces as either balanced = same speed or unbalanced = accelerarting

e) none of the above answers are correct

the total distance that martina travels that day is

(distance from home to mom's office) plus (distance from mom's office to school)

plus (distance from school to library) plus (distance from library to friend's house)

plus (distance from friend's house to martina's house).

(we don't know what any of these distance actually is.)

r = ρ x length / area  

ρ = r x area / length  

ρ is in ohm-meters  

in basic units, it is m³kg/s³a²  

i think this is it.