12. An 8 g bullet is fired from a rifle. The bullet passes through a 10 cm plank. This reduces the bullet's velocity from 400 m. s-1 west to 300 m. s-1 west.
a) Calculate the bullet's initial momentum.
b) Calculate the bullet's final momentum.
c) Calculate the bullet's change in momentum.
d) Draw a labelled vector diagram to illustrate the bullet's initial, final and
change in momentum vectors.

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.

Calculate the amount of heat produced when 18000 coulombs of charge is transferred in one hour through a potential difference of 50v

Which atomic model was proposed as a result of j. j. thomson’s work?