Answer:
35.7 kg
Explanation:
We are given that
Left scale reads =200N
Right scale reads=150 N
We have to find the mass in kg.
We know that
Weight of child= Sum of two scales=200+150=350 N
Acceleration due to gravity=![9.8 m/s^2](https://tex.z-dn.net/?f=9.8%20m%2Fs%5E2)
We know that
Weight= mg
Using the formula
![350=9.8 m](https://tex.z-dn.net/?f=350%3D9.8%20m)
![m=\frac{350}{9.8}=35.7 kg](https://tex.z-dn.net/?f=m%3D%5Cfrac%7B350%7D%7B9.8%7D%3D35.7%20kg)
Hence, the mass of child=35.7 kg
The answer is reminiscence.
One method of coping with change is through reminiscence. There are several positive benefits of engaging in reminiscence. The present may be depressing or very unsatisfactory. By recalling a happier time, an older person may derive some contentment or the ability to endure the present.
Object B has the slowest moving molecule because yea<span />
Judging by the density (19.3 g/ml) there's a very good chance that it could be gold.
Answer:
ω₂=1.20
Explanation:
Given that
mass of the turn table ,M= 15 kg
mass of the ice ,m= 9 kg
radius ,r= 25 cm
Initial angular speed ,ω₁ = 0.75 rad/s
Initial mass moment of inertia
![I_1=\dfrac{M+m}{2}r^2](https://tex.z-dn.net/?f=I_1%3D%5Cdfrac%7BM%2Bm%7D%7B2%7Dr%5E2)
![I_1=\dfrac{15+9}{2}\times 0.25^2\ kg.m^2](https://tex.z-dn.net/?f=I_1%3D%5Cdfrac%7B15%2B9%7D%7B2%7D%5Ctimes%200.25%5E2%5C%20kg.m%5E2)
![I_1=0.75\ kg.m^2](https://tex.z-dn.net/?f=I_1%3D0.75%5C%20kg.m%5E2)
Final mass moment of inertia
![I_2=\dfrac{M}{2}r^2](https://tex.z-dn.net/?f=I_2%3D%5Cdfrac%7BM%7D%7B2%7Dr%5E2)
![I_2=\dfrac{15}{2}\times 0.25^2\ kg.m^2](https://tex.z-dn.net/?f=I_2%3D%5Cdfrac%7B15%7D%7B2%7D%5Ctimes%200.25%5E2%5C%20kg.m%5E2)
![I_2=0.468\ kg.m^2](https://tex.z-dn.net/?f=I_2%3D0.468%5C%20kg.m%5E2)
Lets take final speed of the turn table after ice evaporated =ω₂ rad/s
Now by conservation angular momentum
I₁ ω₁ =ω₂ I₂
![\omega_2=\dfrac{0.75\times 0.75}{0.468}\ rad/s](https://tex.z-dn.net/?f=%5Comega_2%3D%5Cdfrac%7B0.75%5Ctimes%200.75%7D%7B0.468%7D%5C%20rad%2Fs%20)
ω₂=1.20