Pascal's Law. Pascalâs law, or the principle of transmission of fluid-pressure, is a principle in fluid mechanics that states that: pressure exerted anywhere in a confined incompressible fluid is transmitted equally in all directions throughout the fluid such that the pressure ratio (initial difference) remains the same.
$1 to $10. 1  A brand new set of essential hockey equipment can cost up to about a $1,000. 2  Unfortunately, you will need a specific set of equipment for each new season when the child is playing from about 6 years to 14 years of age. Other essential equipment to include in the cost are the helmet with a cage at about $80-$130; shoulder pads for $50 to $100; elbow pads costing $30 to$60 and gloves, which should be just the right fit to be able to properly hold the stick, which could cost $30 to $100.
A: Like that other popular world game, soccer, tennis is the most basic of sports-you need a racquet and a can of balls. And it doesn't have to cost much. Racquets can be purchased for under $40, and balls shouldn't run you more than $3 a can.