An old brick has a natural cavity on one side, providing a cool daytime slug hiding place. Look under any you have around the garden and dispose of the slugs found sheltering. Purposely position a few to create slug shelters, and check daily. A brick also makes a handy squishing implement.
Q Angle of the Knee. The Q angle of the knee is a measurement of the angle between the quadriceps muscles and the patella tendon and provides useful information about the alignment of the knee joint.
The solid angle, W, in steradians, is equal to the spherical surface area, A, divided by the square of the radius, r. Most radiometric measurements do not require an accurate calculation of the spherical surface area to convert between units.