A boat travels from south bank to north bank of a river. Maximum speed of boat in still water is
8 km/hr. The river is flowing at a rate of 4 km/hr.
To arrive at a point opposite to the point of start,
the boat should start at an angle :-
(1) tan-' (1/2) W of N
(2) tan-' (1/2) N of W
(3) 30° W of N
(4) 30° N of W

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.

15. give an example for some particles or waves that are moving faster than light in everyday life 16. what is a laser? 17. what is an oscilloscope? 18. what does it means practically that nothing is faster than light in vacuum? 19. what is vacuum?

Write a full page that sumerizes thermodynamics it’s from the website visionlearnig