Tips are calibrated with water so an 80/70 designated tip means an 80-degree spray angle with 7 gpm flow rate at a set pressure and the viscosity of water. All sealcaoting contractors have ...

the large deviations from 45 degrees for the optimum launch angle for maximum range of a garden hose were wrongly attributed to the effect of air resistance (3 September). Such deviations are ...

and he showed that maximum range is achieved by launching the ball at a 45-degree angle. As a cannonball has a very high momentum and experiences a relatively low air resistance, artillery crews ...