A) Reduces herbicide and pesticide use, which would otherwise damage the ecosystem
Answer:
the road has a larger coefficient of linear expansion than the dirt
Work= force x distance
work= 750 x 2
work =1500
power =work/time
power= 1500/ 0.3
power= 5000W
answer: b. 5000W
I=22 ÷20
Explanation:
then put the on the calculator you'll get you answer
Answer:
D . 1.47 x 10⁻² Ω-m
Explanation:
L = length of the cylindrical resistor = 2 m
d = diameter = 0.1 m
A = Area of cross-section of the resistor = (0.25)
d² = (0.25) (3.14) (0.1)² = 0.785 x 10⁻² m²
V = battery Voltage = 12 volts
= current flowing through the resistor = 3.2 A
R = resistance of the resistor
Resistance of the resistor is given as
R = 3.75 Ω
= resistivity
Resistance is also given as
![R = \frac{ \rho L}{A}](https://tex.z-dn.net/?f=R%20%3D%20%5Cfrac%7B%20%5Crho%20L%7D%7BA%7D)
![3.75 = \frac{ \rho (2)}{(0.785\times 10^{-2})}](https://tex.z-dn.net/?f=3.75%20%3D%20%5Cfrac%7B%20%5Crho%20%282%29%7D%7B%280.785%5Ctimes%2010%5E%7B-2%7D%29%7D)
= 1.47 x 10⁻² Ω-m