Answer:
14.69
Explanation:
The circle of radius R = 11.0m
Force f = 3 times her Weight
= 3W = 3mg
Then the net force acting on her
F = W + F(centripetal)
= mg + mv²/r
= Mg + mv²/r = 3mg
Then her speed is going to be
V = √2gr
Where g =9.81m/s²
R = 11.0
When we put these values into the formula we get:
V = √2x9.81x11.0
V = √215.82
V = 14.69
Answer:
1.208
Explanation:
L = Length of tube
c = Speed of light in air
v = Speed of light in jelly
Time taken by light in tube
![\dfrac{L}{c}=8.72](https://tex.z-dn.net/?f=%5Cdfrac%7BL%7D%7Bc%7D%3D8.72)
Time taken when jelly is present
![\dfrac{L}{v}=8.72+1.82\\\Rightarrow \dfrac{L}{v}=10.54\ ns](https://tex.z-dn.net/?f=%5Cdfrac%7BL%7D%7Bv%7D%3D8.72%2B1.82%5C%5C%5CRightarrow%20%5Cdfrac%7BL%7D%7Bv%7D%3D10.54%5C%20ns)
Dividing the above equations we get
![\dfrac{v}{c}=\dfrac{8.72}{10.54}\\\Rightarrow \dfrac{c}{v}=\dfrac{10.54}{8.72}\\\Rightarrow n=1.208](https://tex.z-dn.net/?f=%5Cdfrac%7Bv%7D%7Bc%7D%3D%5Cdfrac%7B8.72%7D%7B10.54%7D%5C%5C%5CRightarrow%20%5Cdfrac%7Bc%7D%7Bv%7D%3D%5Cdfrac%7B10.54%7D%7B8.72%7D%5C%5C%5CRightarrow%20n%3D1.208)
The refractive index of the jelly is 1.208
Yea this is easy. To find force, mass, or acceleration just use this formula
F=ma aka (force= mass • acceleration)
Explanation:
(9) Acceleration due to gravity is defined as the acceleration between two massive bodies when they are moving under free fall.
The relation between g and G is given by :
![g=\dfrac{GM}{r^2}](https://tex.z-dn.net/?f=g%3D%5Cdfrac%7BGM%7D%7Br%5E2%7D)
Where
G is universal gravitational constant
M is mass of the earth
r is distance
(10) The unwanted product that can toxify the crops are called weeds. To control weeds, a chemical called weedicides are sprayed in the field. Some other methods to control them are Ploughing or tilling of soil etc.