Your child may ride in the front seat if: 1  Your vehicle has no rear seats. 2  Child safety restraints must never be placed on side-facing vehicle seats. 3  The rear seats are rear-facing seats. 4  The child restraint system cannot be properly installed in the rear seat.
In computer networking, ping is a specific method for sending messages from one computer to another as part of troubleshooting Internet Protocol (IP) network connections. A ping test determines whether your client (computer, phone or similar device) can communicate with another device across a network. In cases where network communication is successfully established, ping tests also can determine the connection latency (a technical term for connection delay) between the two devices.
Assuming that the experiments are properly controlled, that is, everything but the ball type is the same, then what is different is how much energy is lost in the ball. Ping-pong balls are very stiff and springy -- they lose only a small fraction of their energy when they bounce on a hard surface. On a soft, squishy surface, the ping-pong ball may bounce less well (but then again, the other balls may bounce less well also). Some surfaces are very complicated, like a mattress.