Answer:
Opened Push-button Switch (i.e. a PTM Switch)
Explanation:
Tha's just another symbol for a switch, but this one specifies that the switch is a push-button type of switch.
Since it's not touching and completing the line, the state of the switch is initially open.
Answer: Advertising acts in a method similar to a fee. People who watch TV broadcasts must watch ADs. TV stations turn this into money by selling airtime to advertisers.
Explanation:
A non-rival good is a good whose consumption by one person does not reduce the remaining quantity available. An example is a street light.
For non-excludable goods, it is impossible to prevent everyone from enjoying the benefits of the good. An example is a lighthouse. This is where the free rider problem comes in.
A free rider is someone enjoying the benefits of a good without paying for it. When a good is both non-rival and non-excludable, it is convenient for consumers to enjoy the benefit without paying for it.
If TV broadcasts are both non-rival and non-excludable, everybody can choose to become a free rider. Advertising can solve this problem by converting free riders to potential buyers of goods or services advertised during broadcasts. This way, stations can generate revenue by selling airtime.
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)
Answer:
All of them cause friction
Explanation:
google