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 comes from the speed with which 38 Degrees can launch a campaign or find out members' views. Campaigning techniques include both online methods, such as mass email, social media, blogs and online petitions, and offline methods, such as calling an MP or visiting a surgery. 38 Degrees has also fundraised from its membership to commission legal advice and to run advertising campaigns. 38 Degrees 38 Degrees is a British not-for-profit political-activism organisation. It describes itself as "progressive" and claims to "campaign for fairness, defend rights, promote peace, preserve the planet and deepen democracy in the UK". In October 2013, it