Pressure angle 25 degrees. Earlier gears with pressure angle 14.5 were commonly used because the cosine is larger for a smaller angle, providing more power transmission and less pressure on the bearing; however, teeth with smaller pressure angles are weaker. To run gears together properly their pressure angles must be matched. The pressure angle is also the angle of the sides of the trapezoidal teeth on the corresponding rack. The force transmitted during the mating of gear teeth acts along the normal. This force has components along the pitch line and the other along the line perpendicular to the pitch line. The
38 Degrees multi-issue movement. It aims to empower UK citizens by providing easy ways for them to take action on the issues they care about, e.g., climate change, human rights and poverty. It claims "it’s 38 Degrees members who set priorities and we decide on what we campaign on together". They publish the results of their membership polls on their website. While 38 Degrees refers to 'members', there is no formal membership and these are simply people on its email mailing list. Each week 50,000 members, chosen at random, are asked to vote for their top priorities; only ones where there is