If you hold your arm outstretched with palm upward the force to keep your arm from falling comes from your deltoid muscle. Assume that the arm has mass 4.0 kg and the distances and angles shown in figure 1. What force must the deltoid provide to keep the arm in this position.

What type of light does this light bulb produce most (i.e. at what wavelength does the spectrum have maximum intensity)?

Which of the following statements is true about women and minorities in early psychology? a. in the early 20th century, numerous graduate schools recruited women and minorities to study psychology. b. opportunities in higher education were limited for women and minorities in the early 20th century due to discrimination. c. despite some obstacles, there were numerous employment opportunities for women and minorities. d. women and minorities were often selected to do academic research in an effort to make the field more diverse.

Arod of some material 0.20 m long elongates 0.20 mm on heating from 21 to 120°c. determine the value of the linear coefficient of thermal expansion [in (degrees c)^-1] for this material.