Answer:
The correct solution is "122.2211".
Explanation:
Given:
deceleration,
a = 22 ft/sec²
Initial velocity,
![V_i=50 \ m/h](https://tex.z-dn.net/?f=V_i%3D50%20%5C%20m%2Fh)
Now,
![V_i=50 \ m/h\times 5280 \ ft/m\times hr/3600 \ s](https://tex.z-dn.net/?f=V_i%3D50%20%5C%20m%2Fh%5Ctimes%205280%20%5C%20ft%2Fm%5Ctimes%20hr%2F3600%20%5C%20s)
![=73.333 \ ft/sec](https://tex.z-dn.net/?f=%3D73.333%20%5C%20ft%2Fsec)
Now,
Final velocity,
![V_f=0](https://tex.z-dn.net/?f=V_f%3D0)
Initial velocity,
![V_{initial} = 73.333 \ ft/sec](https://tex.z-dn.net/?f=V_%7Binitial%7D%20%3D%2073.333%20%5C%20ft%2Fsec)
hence,
⇒ ![V_f^2=V_i^2+2aD](https://tex.z-dn.net/?f=V_f%5E2%3DV_i%5E2%2B2aD)
By putting the values, we get
![0=(73.333)^2+2\times( -22) D](https://tex.z-dn.net/?f=0%3D%2873.333%29%5E2%2B2%5Ctimes%28%20-22%29%20D)
![44D=(73.333)^2](https://tex.z-dn.net/?f=44D%3D%2873.333%29%5E2)
![D=\frac{(73.333)^2}{44}](https://tex.z-dn.net/?f=D%3D%5Cfrac%7B%2873.333%29%5E2%7D%7B44%7D)
Answer:
2 Electrons
Explanation:
Both the Hydrogen atom will share electron equally by covalent bonding. so there will be 2 electron in the bonding molecular orbital.
Answer:
none of them it is 60% whoever gave u this don't have sence of what is right or wrong
Answer:
<em>The bullet was 0.52 seconds in the air.</em>
Explanation:
<u>Horizontal Motion
</u>
It occurs when an object is thrown horizontally with a speed v from a height h.
The object describes a curved path ruled exclusively by gravity until it hits the ground.
To calculate the time the object takes to hit the ground, we use the following equation:
![\displaystyle t=\sqrt{\frac{2y}{g}}](https://tex.z-dn.net/?f=%5Cdisplaystyle%20t%3D%5Csqrt%7B%5Cfrac%7B2y%7D%7Bg%7D%7D)
Note it doesn't depend on the initial velocity but on the height.
The bullet is fired horizontally at h=1.3 m, thus:
![\displaystyle t=\sqrt{\frac{2\cdot 1.3}{9.8}}](https://tex.z-dn.net/?f=%5Cdisplaystyle%20t%3D%5Csqrt%7B%5Cfrac%7B2%5Ccdot%201.3%7D%7B9.8%7D%7D)
![\displaystyle t=\sqrt{\frac{2.6}{9.8}}](https://tex.z-dn.net/?f=%5Cdisplaystyle%20t%3D%5Csqrt%7B%5Cfrac%7B2.6%7D%7B9.8%7D%7D)
t = 0.52 s
The bullet was 0.52 seconds in the air.