A laboratory heating element is constructed from a single round nichrome wire that is 0.75 m long and has a diameter of 0.40 mm at 20 °C. At this temperature the resistivity of nichrome is 1.5×10−6Ω⋅m.
a. Calculate the electrical resistance of the heating element at 20 °C. Express your result with appropriate units and show all steps, including any unit conversions you perform.