Which of the following is not a subatomic particle?

question 2 options:

a. proton

b. neutron

c. electron

d. nucleus

The coefficient of friction is a number that represents the resistance to sliding between two in contact with one another.

The diagram shows four locations in the electric field of a positive point charge m. at which location is the electric potential the greatest.

Place several e-field sensors at a few points on different equipotential lines, and look at the relationship between the electric field and the equipotential lines. which statement is true? 1-at any point, the electric field is perpendicular to the equipotential line at that point, and it is directed toward lines of higher voltages. 2-at any point, the electric field is perpendicular to the equipotential line at that point, and it is directed toward lines of lower voltages. 3-at any point, the electric field is parallel to the equipotential line at that point.