An experiment is conducted on a long straight wire of diameter d. a constant current is sent through the wire and the magnetic field on the surface of the wire is measured to be b1. the experiment is then repeated with the same current but with a wire of diameter 2d. the magnetic field measured on the surface of this second wire will be which of the following?

b1, b1 / 4, 4b1, b1 / 2

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.

Who was the first scientist to measure speed as distance over time?

Determine the age of a fossil if it had only one eighth of its original carbon-14 content remaining?