Imagine that an uncharged pith ball is brought into the electrostatic field of a charged rod. the side of the pith ball closest to the negatively charged end of the rod will

What defines the mass number of an isotope? a. the sum of the neutrons and protons b. the sum of the neutrons and electrons c. the number of neutrons d. the number of protons

Determine the maximum r-value of the polar equation r =3+3 cos 0

Arunner is training for an upcoming marathon by running around a 100-m-diameter circular track at constant speed. let a coordinate system have its origin at the center of the circle with the x-axis pointing east and the y-axis north. the runner starts at (x, y) = (50 m, 0 m) and runs 2.5 times around the track in a clockwise direction.