The white disks in the petri plates are soaked in herbicide, which affects the roots, stalks, leaves, and cobs of a corn plant. If the transformed plants were grown in the presence of herbicide, which corn plant would result from the choices shown below?

A. Corn plant A.
B. Corn plant B.
C. Corn plant C.
D. Corn plant D.

Corn Plant C

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0.2592 Ω

Explanation:

From Electric Energy,

E = V²t/R Equation 1

Where E = Electric Energy, V = Voltage, R = Resistance, t = time

make R the subject of the equation

R = V²t/E Equation 2

Given: V = 9.0 V, E = 1.5×10⁵ J, t = 8 hours = 8×60 = 480 s

Substitute into equation 2

R = 9²(480)/(1.5×10⁵)

R = 81×480/150000

R = 38880/150000

R = 0.2592 Ω

Hence the resistance of the resistor = 0.2592 Ω