Answer:
Tech B
Explanation:
Horsepower (hp) refers to a unit of measurement of power in respect of the output of engines or motors.
Horsepower is the common unit of power. It indicates the rate at which work is done.
The formula
, where rpm is the engine speed, T is the torque, and 5,252 is radians per second.
So,
Tech B is correct
Answer:
slenderness ratio = 147.8
buckling load = 13.62 kips
Explanation:
Given data:
outside diameter is 3.50 inc
wall thickness 0.30 inc
length of column is 14 ft
E = 10,000 ksi
moment of inertia ![= \frac{\pi}{64 (D_O^2 -D_i^2)}](https://tex.z-dn.net/?f=%3D%20%5Cfrac%7B%5Cpi%7D%7B64%20%28D_O%5E2%20-D_i%5E2%29%7D)
![I = \frac{\pi}{64}(3.5^2 -2.9^2) = 3.894 in^4](https://tex.z-dn.net/?f=%20I%20%3D%20%5Cfrac%7B%5Cpi%7D%7B64%7D%283.5%5E2%20-2.9%5E2%29%20%3D%203.894%20in%5E4)
Area ![= \frac{\pi}{4} (3.5^2 -2.9^2) = 3.015 in^2](https://tex.z-dn.net/?f=%3D%20%5Cfrac%7B%5Cpi%7D%7B4%7D%20%283.5%5E2%20-2.9%5E2%29%20%3D%203.015%20in%5E2)
![radius = \sqrt{\frac{I}{A}}](https://tex.z-dn.net/?f=radius%20%3D%20%5Csqrt%7B%5Cfrac%7BI%7D%7BA%7D%7D)
![r = \sqrt{\frac{3.894}{3.015}](https://tex.z-dn.net/?f=r%20%3D%20%5Csqrt%7B%5Cfrac%7B3.894%7D%7B3.015%7D)
r = 1.136 in
slenderness ratio ![= \frac{L}{r}](https://tex.z-dn.net/?f=%20%3D%20%5Cfrac%7BL%7D%7Br%7D)
![= \frac{14 *12}{1.136} = 147.8](https://tex.z-dn.net/?f=%3D%20%5Cfrac%7B14%20%2A12%7D%7B1.136%7D%20%3D%20147.8)
buckling load ![= P_cr = \frac{\pi^2 EI}}{l^2}](https://tex.z-dn.net/?f=%3D%20P_cr%20%3D%20%5Cfrac%7B%5Cpi%5E2%20EI%7D%7D%7Bl%5E2%7D)
![P_{cr} = \frac{\pi^2 *10,000*3.844}{( 14\times 12)^2}](https://tex.z-dn.net/?f=P_%7Bcr%7D%20%3D%20%5Cfrac%7B%5Cpi%5E2%20%2A10%2C000%2A3.844%7D%7B%28%2014%5Ctimes%2012%29%5E2%7D)
![P_{cr} = 13.62 kips](https://tex.z-dn.net/?f=P_%7Bcr%7D%20%3D%2013.62%20kips)