can you show me where is the r for the FB to generate restoring moment and overturning moment in the diagram ? so that i can understand better what you said
then , what is the correct yp ?
i choose my initial yp = cX^2 + Dx + E , nut i found that the term E is similar to the A , so i multiply the initial yp with x , to get my new yp
Homework Statement
i gt stucked here ... how to continue ? what's wrong with my working ? i found 2 values for D , whcih is wrong
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when the ship is tilted more , the ship will become inclined more ( bigger portion of right hand side part of the ship will be submerged in water ) . this caused the center of buoyancy to be located more to the right , this cause the B is very far from the G . The ship will...
Homework Statement
why the floating body still stable when G ( center of gravity ) is above the B ( center of buoyancy)?
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The Attempt at a Solution
in my opinion , the statement is worng , because when G is above B , G has the tendency to move downward , causing the object...
the horizontal component of force should be -1.272 N + 2.54 = 1.27N N to the right, whereas the direction and magnitude of vertical force is the same ? then , the direction of resultant of force should be upwards just like the diagram below?
ok , i can understand the red part of the equation (9810)(2.1)(4.2)- 9810(0.35)(0.7) -Fx = 1000(5.88)(8.4-1.401) , but 1000(5.88)(8.4-1.401) is force , am i right ? it's not force per unit width... they are not having the same unit...how cvan they be equqal to each other?
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why the resultant force on blade is acted downwards (toward A)? why shouldn't it be slanted upwards ?
since the horizontal component of the force acted 2.12kN to the left , and 0.735kN upwards , we would get the resultant force acting slanted upwards , right ?
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what is the 2.1 and 0.35 refers to in the equation of (9810)(2.1)(4.2)- 9810(0.35)(0.7) -Fx = 1000(5.88)(8.4-1.401) ??
is it the width ? but , the width is not given ?
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isn't that p1 and [2 at the same point ? why shouldn't the P1 = P2 , which is
ρg(h1 +h2 +h3) ?
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why the author consider the coefficient of discharge as the z here ? what is exactly coefficient of discharge?
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why Fr(Lp) = FB / 2 ? can someone help to explain ?
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shouldn't it be 2FB = Fr(Lp) ? since FB act on 2 sides of the gate ...[/B]
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how can the average density of the body equal to the density of fluid(2nd photo) ? the object is not completely submerged in the liquid , so the density of object should be lower , right ?
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I was told that kinematic viscosity depends on pressure , but not dynamic viscosity
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in my opinion, the dynamic viscosity depends on pressure , since it's formula is μ = tau / (du/dy) , where tau is the stress . and stress can...
Homework Statement
why the restoring moment in diagram 3-48 must be in anti-clockwise direction ? can't be in clockwise direction ? pls refer to the last photo ( i sketched it) , if the B' is located on the left of the G , teh restoring moment is clockwise, right ?
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why the formula of weight of fluid block is given by the formula of ρg[ (R^2) - pi(R^2) ] 1?
what does the 1m mean here ?
shouldn't it = ρg (pi) (R^2) h ?
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i don't understand the statement 1 and 2 , can someone help to explain ?
for 1 , does the author mean Fh= Fv ??
for 2 , does the author mean Fv = Fh + W ? but in statement 1 , Fh already = Fv
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why the formula of volume is given by
integral of P and dA , the integral of P and dA would yield Force , right ?
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why the alternative formula of viscosity not = (mass x length ) / ( time x area) ?
for force x time , we would get (mass x length ) / time ...
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why the fluid need the wall to eliminate the shear stress?
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is it because if there is no wall to support teh fluid , the fluid would move continously , resulting the shear stress act on water?
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why when ℓ / R ≪ 1 , the curvature effect can be neglected ??
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no matter how small or how big is R , it is strill considered as curvature , right ??
i have one more question here . I was also told that the pressure at the concave side of the bubbles is higher ... why is it so ? is it because of the circumference of the pressure at the concave side is higher?
Homework Statement
why the force of bubble is given by the formula of 2(2 pi R ) σs ? why not (2 pi R ) σs + (2 pi R+ ΔR) σs ? Since the radius of th outer circumfernece and inner circumference are the different ?
Homework Equations
The Attempt at a Solution
what do yo you mean ? we want to find the resultant force , right ? So , the correct approach would be 12cos60 + 12 , right ? since they are both directed to the right