Mike has a mass of 60 kg. he pulls on a wagon of mass 30 kg with a force of 20 n. the wagon remains motionless. the wagon exerts a force of on mike.
a.

45 n

c.

60 kg

b.

20 n

d.

20 kg

An electron and a proton have the same kinetic energy upon entering a region of constant magnetic field and their velocity vectors are perpendicular to the magnetic field. suppose the magnetic field is strong enough to allow the particles to circle in the field. note: you'll need to look up the masses for an electron and proton. 1) what is the ratio of the radii of their circular paths rp/re?

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.

What do you think car designers do if the damage caused by a crash test is too severe?