El sol es una bola de gas así como las estrellas:)
Planetary Nebulae hope that helps
Answer:
<h3>40</h3>
Explanation:
Given the following
Ax = 9,
Ay = 12,
Bx = 15
By = 20
Get A and B
A = √9²+12²
A= √81+144
A = √225
A = 15
Get B;
B = √15²+20²
B = √225+400
B = √625
B = 25
get /A+B/
A+B = 15+25
/A+B/ = /40/
Hence the value of /A+B/ is 40
Answer
given,
angular speed of disk = 32 rad/s
mass dropped, m = 1.3 Kg
radius, r = 0.25 m
new rotational velocity = ?
now,
Initial rotational inertia of the disk
![I_1 = \dfrac{1}{2}MR^2](https://tex.z-dn.net/?f=I_1%20%3D%20%5Cdfrac%7B1%7D%7B2%7DMR%5E2)
Assuming the mass and the radius of the disk is equal to 7.5 Kg and 0.85 m respectively
now,
![I_1 = \dfrac{1}{2}\times 7.5\times 0.85^2](https://tex.z-dn.net/?f=I_1%20%3D%20%5Cdfrac%7B1%7D%7B2%7D%5Ctimes%207.5%5Ctimes%200.85%5E2)
![I_1 = 2.71\ Kgm^2](https://tex.z-dn.net/?f=I_1%20%3D%202.71%5C%20Kgm%5E2)
Rotational inertia after mass is dropped on it
![I_2 = \dfrac{1}{2}MR^2 + mr^2](https://tex.z-dn.net/?f=I_2%20%3D%20%5Cdfrac%7B1%7D%7B2%7DMR%5E2%20%2B%20mr%5E2)
![I_2 = 2.71 + 1.3\times 0.25^2](https://tex.z-dn.net/?f=I_2%20%3D%202.71%20%2B%201.3%5Ctimes%200.25%5E2)
![I_2 = 2.79\ Kg.m^2](https://tex.z-dn.net/?f=I_2%20%3D%202.79%5C%20Kg.m%5E2)
using angular momentum conservation
I₁ω₁ = I₂ω₂
2.71 x 32 = 2.79 x ω₂
ω₂ = 31 rad/s
new angular velocity of the disk is ω₂ = 31 rad/s