Helium, Neon, and Xenon are all part of the same column on the Periodic Table. Such a column is referred to as a Group, because they have the same number of valence electrons in their outermost shell. Hope this helps!
The answer is b, anything that has mass and takes up space
Answer:
3g/cm³
Explanation:
<em>Use the formula:</em>
density = mass ÷ volume
<em>Substitute (plug in) the values:</em>
density = 3 ÷ 1 = 3g/cm³
Answer:
6.5e-4 m
Explanation:
We need to solve this question using law of conservation of energy
Energy at the bottom of the incline= energy at the point where the block will stop
Therefore, Energy at the bottom of the incline consists of the potential energy stored in spring and gravitational potential energy=![\frac{1}{2} kx^{2} +PE1](https://tex.z-dn.net/?f=%5Cfrac%7B1%7D%7B2%7D%20kx%5E%7B2%7D%20%2BPE1)
Energy at the point where the block will stop consists of only gravitational potential energy=![PE2](https://tex.z-dn.net/?f=PE2)
Hence from Energy at the bottom of the incline= energy at the point where the block will stop
⇒![\frac{1}{2} kx^{2} +PE1=PE2](https://tex.z-dn.net/?f=%5Cfrac%7B1%7D%7B2%7D%20kx%5E%7B2%7D%20%2BPE1%3DPE2)
⇒![PE2-PE1=\frac{1}{2} kx^{2}](https://tex.z-dn.net/?f=PE2-PE1%3D%5Cfrac%7B1%7D%7B2%7D%20kx%5E%7B2%7D)
Also ![PE2-PE2=mgh](https://tex.z-dn.net/?f=PE2-PE2%3Dmgh)
where
is the mass of block
is acceleration due to gravity=9.8 m/s
is the difference in height between two positions
⇒![mgh=\frac{1}{2} kx^{2}](https://tex.z-dn.net/?f=mgh%3D%5Cfrac%7B1%7D%7B2%7D%20kx%5E%7B2%7D)
Given m=2100kg
k=22N/cm=2200N/m
x=11cm=0.11 m
∴![2100*9.8*h=\frac{1}{2}*2200*0.11^{2}](https://tex.z-dn.net/?f=2100%2A9.8%2Ah%3D%5Cfrac%7B1%7D%7B2%7D%2A2200%2A0.11%5E%7B2%7D)
⇒![20580*h=13.31](https://tex.z-dn.net/?f=20580%2Ah%3D13.31)
⇒![h=\frac{13.31}{20580}](https://tex.z-dn.net/?f=h%3D%5Cfrac%7B13.31%7D%7B20580%7D)
⇒h=0.0006467m=![6.5e-4](https://tex.z-dn.net/?f=6.5e-4)