Answer:
books = []
fp = open("bookTitles.txt")
for line in fp.readlines():
title = line.strip()
if title not in books:
books.append(title)
fp.close()
fout = open("noDuplicates.txt", "w")
for title in books:
print(tile, file=fout)
fout.close()
except FileNotFoundError:
print("Unable to open bookTitles.txt")
Answer:58.28 N
Explanation:
Given data
![dia. of nozzle \left ( d\right )=2 cm](https://tex.z-dn.net/?f=dia.%20of%20nozzle%20%5Cleft%20%28%20d%5Cright%20%29%3D2%20cm)
![initial velocity\left ( u\right )=15 m/s](https://tex.z-dn.net/?f=initial%20velocity%5Cleft%20%28%20u%5Cright%20%29%3D15%20m%2Fs)
![height\left ( h\right )=2m](https://tex.z-dn.net/?f=height%5Cleft%20%28%20h%5Cright%20%29%3D2m)
Now velocity of jet at height of 2m
![v^2-u^2=2gh](https://tex.z-dn.net/?f=v%5E2-u%5E2%3D2gh)
![v^2=15^2-2\left ( 9.81\right )\left ( 2\right )](https://tex.z-dn.net/?f=v%5E2%3D15%5E2-2%5Cleft%20%28%209.81%5Cright%20%29%5Cleft%20%28%202%5Cright%20%29)
![v=\sqrt{185.76}=13.62 m/s](https://tex.z-dn.net/?f=v%3D%5Csqrt%7B185.76%7D%3D13.62%20m%2Fs)
![Now\ forces\ on\ plate\ are\ weight\left ( Downward\right ) and jet\ force\left ( upward\right )](https://tex.z-dn.net/?f=Now%5C%20forces%5C%20on%5C%20plate%5C%20are%5C%20weight%5Cleft%20%28%20Downward%5Cright%20%29%20and%20jet%5C%20force%5Cleft%20%28%20upward%5Cright%20%29)
equating them
W=![\left ( \rho Av\right )v](https://tex.z-dn.net/?f=%5Cleft%20%28%20%5Crho%20Av%5Cright%20%29v)
W=![10^{3}\times \frac{\pi}{4}\left ( 0.02\right )^2\times 13.62^2](https://tex.z-dn.net/?f=10%5E%7B3%7D%5Ctimes%20%5Cfrac%7B%5Cpi%7D%7B4%7D%5Cleft%20%28%200.02%5Cright%20%29%5E2%5Ctimes%2013.62%5E2)
W=58.28 N
The answer is b, I hope this helps you
Answer:
The appropriate solution is "1481.76 N".
Explanation:
According to the question,
Mass,
m = 540 kg
Coefficient of static friction,
= 0.28
Now,
The applied force will be:
⇒ ![F=\mu_s mg](https://tex.z-dn.net/?f=F%3D%5Cmu_s%20mg)
By substituting the values, we get
![=0.28\times 540\times 9.8](https://tex.z-dn.net/?f=%3D0.28%5Ctimes%20540%5Ctimes%209.8)
Flip flops are not required