An undersea camera (Figure 5.36 ) is to hang from a float in the ocean, allowing it to take constant video of undersea life. The camera is relatively heavy; it weighs 40 pounds and has a volume of only 0.3 f t 3 . It is to hang 2 ft below the float on a pair of wires, allowing it take video at this constant depth. The float will be cylindrical, have a specific gravity, sg = 0.15 , have a thickness of 6 in. What is the minimum diameter of the float? Note that for the minimum float, the waterline will be coincident with the top of the float. If the float is made of a larger diameter, what will happen? If the float is made of a smaller diameter, what would happen? Figure 5.36
An undersea camera (Figure 5.36 ) is to hang from a float in the ocean, allowing it to take constant video of undersea life. The camera is relatively heavy; it weighs 40 pounds and has a volume of only 0.3 f t 3 . It is to hang 2 ft below the float on a pair of wires, allowing it take video at this constant depth. The float will be cylindrical, have a specific gravity, sg = 0.15 , have a thickness of 6 in. What is the minimum diameter of the float? Note that for the minimum float, the waterline will be coincident with the top of the float. If the float is made of a larger diameter, what will happen? If the float is made of a smaller diameter, what would happen? Figure 5.36
An undersea camera (Figure 5.36 ) is to hang from a float in the ocean, allowing it to take constant video of undersea life. The camera is relatively heavy; it weighs
40
pounds and has a volume of only
0.3
f
t
3
. It is to hang
2
ft below the float on a pair of wires, allowing it take video at this constant depth. The float will be cylindrical, have a specific gravity, sg =
0.15
, have a thickness of
6
in. What is the minimum diameter of the float? Note that for the minimum float, the waterline will be coincident with the top of the float. If the float is made of a larger diameter, what will happen? If the float is made of a smaller diameter, what would happen?
A five pound-video camera has been lowered one hundred feet into a deep pit on a chain which weighs 0.2 pounds per foot. How much work will it take to haul the camera back up?
2). A piece of lead (sp. Gr. 11.3) is tied to a 130 cc of cork whose specific gravity is 0.25. They float just submerged in water. What is the weight of the lead?
A piece of lead (sp. Gr. 11.3) is tied to a 130 cc of cork whose specific gravity is 0.25. They float just submerged in water. What is the weight of the cork?
Applied Statics and Strength of Materials (6th Edition)
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