Recent content by YKD

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    High School L bracket vs reverse L bracket

    Thanks for the replies! Sorry, make the questions more clear: which one is more supporting for the same heavy load? Q1. A: naked L bracket vs B: reverse naked L bracket Q2. C: braced L bracket vs D: reverse braced L bracket Thank you so much!
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    High School L bracket vs reverse L bracket

    Thanks fresh_42, This uses L-shaped
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    High School L bracket vs reverse L bracket

    Hi all, The photo is a reverse L-shaped bracket installed on the wall, L or reverse L is of more supporting force if all things being equal? Why? Thank you very much!
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    High School What makes tennis loud popping sound?

    Thank you all ^_^ yes, the sound is of lower frequency when the ball is hit on the ground. The center of the strings is the greatest elasticity compared with the outer, but in fact, the stringbed is quite hard because of high string tension, so the string slip should be very less. And one...
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    High School What makes tennis loud popping sound?

    Thanks Danger and Cyrus! The popping sound won't be made when the ball is hit on the ground. It should be related to the strings and the ball, but I have no idea why it is.
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    High School What makes tennis loud popping sound?

    Hi, When I hit the ball on the center of the racquet face, it will make a loud popping sound, less off the center. Why's that? Is this sound related to the strings, the ball, or the racquet? Will different strings, string tension, string pattern, ball hardness, ball felt ...
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    High School I don't know how to calculate a tennis racquet head size thanks

    Thank you very much, CRGreathouse ^_^ Perhaps this racquet is difficult to calculate,right? http://www.tennis-warehouse.com/viewlarge.html?PCODE=RQIS1T
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    High School I don't know how to calculate a tennis racquet head size thanks

    It seems quite complicated... Almost forget to add: My racquet stringbed (hoop not included) length:12.25 inch, width 9 inch Could you please help me calculate it from the link I posted? Thank you ^_^
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    High School I don't know how to calculate a tennis racquet head size thanks

    Thank you, HallsofIvy ^_^ The headsize of my racquet is 89.5 square inch that someone said but the brand said 93. Using W x L x 0.8 is closer to this area. I should use 22/7 x a x b or W x L x 0.8 to caculate the racquet headsize? http://www.tennis-warehouse.com/viewlarge.html?PCODE=LMP...
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    High School I don't know how to calculate a tennis racquet head size thanks

    Hi everybody, The area of a tennis racquet head size is like an egg shape, not oval shape. how to calculate it? Thank you so much for your help ^_^