Laughing duck – where a batsman departs for a duck and ends the team's innings. Silver duck (aka in some regions as a “2-ball duck”) – if a batsman survives one ball but is run out before facing another. Golden duck – when a batsman is dismissed off the first ball.
What is golden duck in cricket? A golden duck is when a batter is out off the very first delivery he faces in a match. Read More...
All 777s lack winglets and instead have raked-wingtips. Some 767s have tall blended winglets, but not all. Therefore, the presence of these winglets indicates that it is not a 777 and is instead a 767*.
Do airlines still use 767? Delta Air Lines is the largest passenger operator still, with 69 767s (48 767-300ER and 21 767-400ER aircraft). Closely following is United Airlines with 54 aircraft (38 767-300ER and 16 767-400ER). Read More...
Thrust is what moves the board forward, lift is what moves it upward, drag from the air pushes backward, and weight is gravity's way of pulling it back down. The speed of the take-off (and the jumping ability of the skater) affects the amplitude, or height, of the jump, which takes the shape of a parabolic arc.
What science is involved in skateboarding? Skateboarders can just take advantage of other physics principles—principles of energy conservation and angular momentum to help fly through the air and seemingly defy gravity. Read More...
