A graphite lead (diameter of 0.5mm, length of 5cm) reaches a temperature of 3077K when a voltage difference of 30.7 V is applied across its ends. Find the current (in A) through the lead.

8 T. E A hollow cylindrical pipe is made from material 1 listed in the table below. The pipe is 3.5 m long, has an outside diameter of 3.7 cm, and an inside diameter of 2.5 cm. Calculate the pipe's weight in Ibs. (1 lb = 4.4482 N) Density Material (kg/m³) 1 Copper 8.9 x 103 2 Iron 7.8 x 103 3 Lead 11.3x 103 rch 直。 SNSV f5 f8 f12 64 OL 图 E3 因/0 24 4 3. 5. 9. 7. F H. K.

Problem 5: A nichrome rod of length LN 58 cm is connected in series (end to end) to a carbon rod of length Lc 8 cm. Both rods have cross-sectional areas of A 55 mm2. At T0 20° C the restístivity of nichrome is ρΝ-1.50 x 10-6 Ω-m and the resistivity of carbon is pc 3.50 x 10-5 Q-m. The temperature coefficient of nichrome is positive with value a-0.4 x 10-3 °C-1. The temperature coefficient of carbon is negative with a value ac--0.5 x 10-3 °c1. The nonlinear dependence of the resistivity on temperature T can be written as ρ ea(T-To) .odu @ theexpertta.com - tracking id: 2N74-2F-82-4A-BAAB-13167. In accordance with Expert TA's Terms of Service. copying this information to any solutions sharing website is strictly forbidden. Doing so may result in termination of your Expert TA Account. A Part (a) Write an expression for the total resistance of the nichrome-carbon combination as a function of temperature in terms of quantities given in the introduction. Simplify your answer as much as…

An engineering intern is studying the effect of temperature on the resistance of a current carrying wire. She applies a voltage to a aluminum wire at a temperature of 59.0°C and notes that it produces a current of 1.40 A. If she then applies the same voltage to the same wire at -88.0°C, what current should she expect (in A)? The temperature coefficient of resistivity for aluminum is 3.90 x 10−³ (°C)-¹. (Assume that the reference temperature is 20°C.) A