A phonograph record 0.30 m in diameter rotates 0.5 times per second. (A) What is its frequency?
(B) What is its period?
(C) What is the linear speed of a point on its rim?
(D) What is the centripetal acceleration of a point on its rim?

Natural forces that can alter ecosystems include seasons and climate changes. t or f

Aray of light traveling parallel to the principal axis of a concave mirror will be reflected through the mirror's

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.