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m_a_m_a [10]
3 years ago
12

Resistivity measurements on the leaves of corn plants are a good way to assess stress and overall health. The leaf of a corn pla

nt has a resistance of 2.3 MΩ measured between two electrodes placed 20 cm apart along the leaf. The leaf has a width of 2.3 cm and is 0.20 mm thick.
Part AWhat is the resistivity of the leaf tissue?Express your answer to two significant figures and include the appropriate units.ρ=________Part BIs this greater than or less than the resistivity of muscle tissue in the human body?(A) greater or(B) less
Physics
1 answer:
Gnoma [55]3 years ago
4 0

Answer:

Part a)

\rho = 52.9 ohm- m

Part b)

the resistivity of corn plant is grater than the resistivity of muscle tissue in the human

Explanation:

Part a)

As we know the formula of resistance is given as

R = \rho \frac{L}{A}

here we know that

\rho = \frac{RA}{L}

here we have

R = 2.3 M ohm

L = 20 cm

Area = (0.023)(0.20 \times 10^{-3})

Area = 4.6 \times 10^{-6} m^2

now we have

\rho = \frac{(2.3 \times 10^6)(4.6 \times 10^{-6})}{0.20}

\rho = 52.9 ohm- m

Part b)

Resistivity of mucle tissue of human is is ranging from 15 ohm-m to 50 ohm m so here we can say that

the resistivity of corn plant is grater than the resistivity of muscle tissue in the human

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