Which is NOT an example of a longitudinal wave? Pinching together the loops of a slinky and letting them go
The compressions of a spring moving back and forth
A water wave at the beach
A sound wave

Atriangle with equal sides of length 10 cm has -2.5-nc charged objects at each corner. part a determine the direction of the electrical force exerted on the object at the top corner due to the two objects at the horizontal base of the triangle. determine the direction of the electrical force exerted on the object at the top corner due to the two objects at the horizontal base of the triangle. horizontally rightward vertically downward vertically upward horizontally leftward