suppose there is an spherical balloon say 100 cu.m . The pressure difference between the air in it and surrounding air is 200N/m2 . If a hole of 1 sq.m is made what will be the flow rate from it. Of course the flow rate will decrease as the time progresses but how to determine it over a period...
does anyone know how to design a spiral spring. i need to design a spiral spring for my project but can't find the theory to design it. i am more concerned with the no of revolutions that a spring can give. Also i need to have a controlled unwinding ie it should release its energy slowly...