Turner's treadmill starts with a velocity of -3.1 m/s and speeds up at regular intervals during a half-hour workout. After 21 min, the treadmill has a velocity of -7.4 m/s. What is the average acceleration of the treadmill during this period? Answer in units of m/s2

Fill in the blank. the number of each type of element in the compound (other than 1) is represented by a small number to the right of the element symbol.

In a hydrogen molecule there are a total of four charges, 2 protons in the two nuclei, and 2 electrons. how many unique charge-pairs are there (without double counting)?

Imagine an isolated positive point charge q (many times larger than the charge on a single proton). there is a charged particle a (whose charge is much smaller than charge q) at a distance from the point charge q. on which of the following quantities does the magnitude of the electric field created by charge q at particle a's position depend? check all that apply.the type of the charge on the charged particle athe relative orientation between q and a (while the distance between q and a is fixed)the specific location of the charged particle a (while the distance between q and a is fixed)the amount of the charge on the point charge qthe specific location of the point charge q (while the distance between q and a is fixed)the distance between the point charge q and the charged particle athe amount of the charge on the charged particle a