Answer:W = 1.23×10^-6BTU
Explanation: Work = Surface tension × (A1 - A2)
W= Surface tension × 3.142 ×(D1^2 - D2^2)
Where A1= Initial surface area
A2= final surface area
Given:
D1=0.5 inches , D2= 3 inches
D1= 0.5 × (1ft/12inches)
D1= 0.0417 ft
D2= 3 ×(1ft/12inches)
D2= 0.25ft
Surface tension = 0.005lb ft^-1
W = [(0.25)^2 - (0.0417)^2]
W = 954 ×10^6lbf ft × ( 1BTU/778lbf ft)
W = 1.23×10^-6BTU
If my math is right its A) 7
because 189 divided by 27 is 7
When your hand hits the table the table will vibrate and your hand will be numb for two to three seconds
From the diagram The value of cos C × sin A = 
<h3>Determine the numerical value of cos C × sin A</h3>
First step : determine the values of cos C and sin A
cos C = adjacent / hypotenuse
= a / b
= 
= √3/2
sin A = sin 60⁰
= √3/2
Therefore the numerical value of cos C * sin A =
In conclusion From the diagram The value of cos C × sin A =
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The resultant force is the overall force. If two forces are acting in the same direction, the resultant force is the sum of all the forces.
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