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What were the gases in the air 4.5 billion years ago?
4.5 billion years ago the earth was a molten ball surrounded by hydrogen and helium.
Why don't balls bounce as high during the second bounce as they do the first bounce?
When the ball hits the ground some energy is given up during the compression and decompression of the ball. The difference between bouncing it on concrete and sand. The sand almost stops the ball while the concrete bounces it back up fairly well. The sound it makes requires energy. Also gravity would rather have an object falling towards the larger mass than away.
Which ball bounces higher golf ball or tennis ball?
A Golf Ball
What is the physical development between 3-7 years of age?
stands and walks on tiptoecan kick a ball confidentlyjumps from low stepspefals a tricycle
What is the circumference of a ping pong ball?
The diameter of any sphere can be calculated by multiplying it's diameter by Pi. For a 40mm diameter Ping Pong Ball, this comes to ~ 125.6 mm. For a 38mm diameter Ping Pong Ball, this comes to ~ 119.32 mm. The diameter of a ping pong ball is 40mm. I do not know the circumference. Before the ball was changed a few years ago to 40mm, it was 38mm. The larger ball travels more slowly and with less spin. This was done to make Table Tennis easier to watch on television, and therefore make the sport more popular. On TV, TT can appear too fast to appreciate, and by enlarging the ball it was hoped that the game would slow. The game has, in fact, slowed, but this has not accomplished the goal of popularizing the sport. Many players would love to see the ball returned to 38mm, as at this size the ball traveled more quickly and more spin was possible, making the ball's travel more manageable.
