In series circuit, Req = R₁ + R₂ + R₃ + ···
In parallel circuit, ![\frac{1}{Req} = \frac{1}{R1} + \frac{1}{R2} + \frac{1}{R3} +...](https://tex.z-dn.net/?f=%5Cfrac%7B1%7D%7BReq%7D%20%20%3D%20%5Cfrac%7B1%7D%7BR1%7D%20%2B%20%5Cfrac%7B1%7D%7BR2%7D%20%2B%20%5Cfrac%7B1%7D%7BR3%7D%20%2B...)
<h3>Q7.</h3>
total resistance in the upper branch = R₂ + R₃ = R₂ + 2
![\frac{1}{Req} = \frac{1}{R2+R3} + \frac{1}{R1}](https://tex.z-dn.net/?f=%5Cfrac%7B1%7D%7BReq%7D%20%3D%20%5Cfrac%7B1%7D%7BR2%2BR3%7D%20%2B%20%5Cfrac%7B1%7D%7BR1%7D)
![\frac{1}{4} = \frac{1}{R2+2} +\frac{1}{6}](https://tex.z-dn.net/?f=%5Cfrac%7B1%7D%7B4%7D%20%3D%20%5Cfrac%7B1%7D%7BR2%2B2%7D%20%2B%5Cfrac%7B1%7D%7B6%7D)
R₂ + 2 = 12
R₂ = 10Ω
<h3>Q8.</h3>
![\frac{1}{Req} = \frac{1}{R2+R3} + \frac{1}{R1}](https://tex.z-dn.net/?f=%5Cfrac%7B1%7D%7BReq%7D%20%3D%20%5Cfrac%7B1%7D%7BR2%2BR3%7D%20%2B%20%5Cfrac%7B1%7D%7BR1%7D)
![\frac{1}{Req} = \frac{1}{2+1} + \frac{1}{4}](https://tex.z-dn.net/?f=%5Cfrac%7B1%7D%7BReq%7D%20%3D%20%5Cfrac%7B1%7D%7B2%2B1%7D%20%2B%20%5Cfrac%7B1%7D%7B4%7D)
Req = 1.7Ω
The amount of excess load that can be imposed on the wing of an airplane depends upon the speed of the airplane.
What is meant by wing loading?
Wing loading in aerodynamics is the ratio of the loaded weight of the aircraft and the area of each wing. It is given as:
W_L = W (weight of the aircraft) / S (gross wing area of the airplane)
The more speed an aircraft gains, the more lift is produced by each unit of wing area.
Thus, with a high value of wing loading the aircraft lands and takes-off at higher speeds with low maneuvering control. Generally, Airliners have high wing loading while smaller airplanes have lower wing loading.
Learn more about wing loading here:
<u>brainly.com/question/14630968</u>
#SPJ4
Answer:
128379.69 J
Explanation:
Potential energy: This can be defined as the energy of a body to to position in the gravitational field. The S.I unit of potential energy is Joules (J).
The expression for potential energy is given as,
ΔEp = mgΔH
ΔEp = mg(H₂-H₁)..................... Equation 1
Where ΔEp =change in Potential Energy, m = mass of the man, g = acceleration due to gravity, H₂ = Height of the 37th floor, H₁ = height of the first floor
Given:m = 91.2 kg, g = 9.8 m/s², H₁ = 3.99 m, H₂ = 3.99×37 = 147.63 m.
Substitute into equation 1
ΔEp = 91.2(9.8)(147.63-3.99)
ΔEp = 893.76(143.64)
ΔEp = 128379.69 J.
In the Newtonian theory of gravitation, the effects of gravity are always attractive, and the resulting force is calculated with respect to the center of gravity of both objects. The law of universal gravitation formulated by Isaac Newton postulates that the force exerted by a point particle with mass M on another with mass m is directly proportional to the product of the masses (and the Universal Gravitation Constant), and inversely proportional to the square of the distance (r) that separates them:
![F = \frac{GMm}{r^2}](https://tex.z-dn.net/?f=F%20%3D%20%5Cfrac%7BGMm%7D%7Br%5E2%7D)
![F = \frac{(6.67*10^{-11})(0.425)(0.425)}{0.5^2}](https://tex.z-dn.net/?f=F%20%3D%20%5Cfrac%7B%286.67%2A10%5E%7B-11%7D%29%280.425%29%280.425%29%7D%7B0.5%5E2%7D)
![F = 4.819*10^{-11}N](https://tex.z-dn.net/?f=F%20%3D%204.819%2A10%5E%7B-11%7DN)
![F \approx 4.82*10^{-11}N](https://tex.z-dn.net/?f=F%20%5Capprox%204.82%2A10%5E%7B-11%7DN)
Therefore the correct answer is 2.
It is weight, if I understand your question.