Amarble is flicked horizontally off a desk with a speed of 3.1 m/s. if it takes
the marble 0.8 seconds to hit the ground, how far from the desk does it land?
a. 2.48 m
b. 2.92 m
c. 3.88 m
d. 0.26 m

Aman pushes on a trunk with a force of 250 newtons. the trunk does not move. how much positive work is done on the trunk? 0.0 j -250 j 250 j 125 j

Which is the correct symbol for an isotope of iodine with 53 protons and 78 neutrons?

Point charges q1 = 51 µc and q2 = −27 µc are placed 1.0 m apart, with q2 on the right. what is the force (in n) on a third charge q3 = 19 µc placed midway between q1 and q2? (assume the positive direction is to the right. indicate the direction with the sign of your answer.)