Answer
Explanation:
Convert the time to seconds = 0.6 × 60 × 60
= 2160seconds
Velocity = distance ÷ time
Velocity = 500 ÷ 2160
Velocity = 0.23meters per seconds(m/s)
Acceleration = Velocity ÷ time
Acceleration = 0.23 ÷ 2160
Acceleration = 0.000106meters per seconds ²(m/s²)
Sodium sulfide formula is Na₂S.
Na is a group 1 element, it has one valence electron therefore it is ready to give that valence electron and form an ionic bond. Once it gives out the electron it becomes a positive ion - Na⁺
sulfur is a group 6 element, has 6 electrons its outer shell and needs to gain 2 more electrons to become stable. Once it gains 2 electrons it becomes a negative ion - S²⁻.
Since Na only gives out 1 electron, S²⁻ ion needs to take in 2 electrons, therefore forms an ionic compound with 2 Na⁺ ions.
decomposition of Na₂S is as follows;
Na₂S(s) --> 2Na⁺(aq) + S²⁻ (aq)
Motion is an example if a car was moving
C. Density.
<span>the quantity of mass per unit volume of a substance.</span>
Answer:
![\frac{MR^{2}\omega _{i}}{(MR^{2}+mr^{2})}=\omega _{f}](https://tex.z-dn.net/?f=%5Cfrac%7BMR%5E%7B2%7D%5Comega%20_%7Bi%7D%7D%7B%28MR%5E%7B2%7D%2Bmr%5E%7B2%7D%29%7D%3D%5Comega%20_%7Bf%7D)
Explanation:
Mass of small disc = m
radius of small disc = r
Mass of large disc = M
Radius of large disc = R
Initial angular speed = ωi
Let the final angular speed is ωf
As no external torque of applied on the system so the angular system remains constant.
I1 ωi = I2 ωf
MR^2 ωi = (MR^2 + mr^2) ωf
![MR^{2}\omega _{i}=(MR^{2}+mr^{2})\omega _{f}](https://tex.z-dn.net/?f=MR%5E%7B2%7D%5Comega%20_%7Bi%7D%3D%28MR%5E%7B2%7D%2Bmr%5E%7B2%7D%29%5Comega%20_%7Bf%7D)
![\frac{MR^{2}\omega _{i}}{(MR^{2}+mr^{2})}=\omega _{f}](https://tex.z-dn.net/?f=%5Cfrac%7BMR%5E%7B2%7D%5Comega%20_%7Bi%7D%7D%7B%28MR%5E%7B2%7D%2Bmr%5E%7B2%7D%29%7D%3D%5Comega%20_%7Bf%7D)