The figure shows four forces exerted on a moving box, moving at a constant speed. If the box continues to move with the same speed in the same direction, which statement is correct? F1 is equal to F4 and F2 is greater than F3.
F1 is equal to F2 and F3 is greater than F4.
F3 is equal to F4 and F1 is equal to F2.
F3 is equal to F4 and F1 is less than F2.

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.

Which magnetic property best describes a magnet’s ability to act at a distance? magnets are dipolar. magnets attract only certain objects. magnets have magnetic fields. magnets can transfer their properties to certain materials.

Which of the following are forms of phase changes a. freezing b. condensation c. heating d. exchanging