Where should an object be placed with reference to a concave mirror of radius of 180cm in order to form a real image having half its liner dimension

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.

Simple machines can a. increase force only b. decrease force only c. increase or decrease force

When the magnetic domains in a material can be aligned, but eventually drift out of alignment, the material is