A copper wire has a resistance of 0.500 $\Omega$ at 20.0 $^o$C, and an iron wire has a resistance of 0.525 $\Omega$ at the same temperature. At what temperature are their resistances equal?

How much would you have to raise the temperature of a copper wire (originally at $20^{\circ} \mathrm{C}$) to increase its resistance by 15%?

How much would you have to raise the temperature of a copper wire (originally at $20^{\circ} \mathrm{C}$ ) to increase its resistance by $16 \%$ ?

Sketch the region $𝑅 = \{(𝑥,𝑦) :1 ≤ 𝑥 ≤ 2,\; 𝑥 + 1 ≤ 𝑦 ≤ 2𝑥 + 4\}$ and write the iterated integral of a continuous function $𝑓$ over $𝑅$ using the order $𝑑𝑦 𝑑𝑥$.

Find the power dissipated in each of these extension cords: (a) an extension cord having a $0.0600-\Omega$ resistance and through which 5.00 A is flowing; (b) a cheaper cord utilizing thinner wire and with a resistance of $0.300\ \Omega.$

A 200-foot length of solid copper wire is measured to have a resistance of $0.500\ \Omega$. a. Determine the cross-sectional area of the wire in both square mils and circular mils. b. Determine the diameter of the wire in mils and in inches.

Make a list of nonwage determinants of labor supply that managers could use to increase the supply of labor.

If the 0.100-mm diameter tungsten filament in a light bulb is to have a resistance of $0.200\ \Omega$ at $20.0^{\circ} \mathrm{C},$ how long should it be?

$(a)$ Of what material is a wire made, if it is $25.0 \mathrm{~m}$ long with a diameter of $0.100 \mathrm{~mm}$ and has a resistance of $77.7 \Omega$ at $20.0^{\circ} \mathrm{C}$ ? $(b)$ What is its resistance at $150.0^{\circ} \mathrm{C}$ ?

What is the resistance of a 20.0-m-long piece of 12-gauge copper wire having a 2.053-mm diameter?

(a) Of what material is a wire made, if it is 25.0 m long with a diameter of 0.100 mm and has a resistance of 77.7 $\Omega$ at 20.0 $^o$C ? (b) What is its resistance at 150.0 $^o$C?

A wire is drawn through a die, stretching it to four times its original length. By what factor does its resistance increase?

A water tank is being towed on an uphill road that makes $14^\circ$ with the horizontal with a constant acceleration of $3.5 m/s^2$ in the direction of motion. Determine the angle the free surface of water makes with the horizontal. What would your answer be if the direction of motion were downward on the same road with the same acceleration?

Your car’s 30.0-W headlight and 2.40-kW starter are ordinarily connected in parallel in a 12.0-V system. What power would one headlight and the starter consume if connected in series to a 12.0-V battery? (Neglect any other resistance in the circuit and any change in resistance in the two devices.)