Two point charges of magnitude 7.00C and -9.00C are placed along the x axis at 0 cm and 40.0 cm. Where must a third charge, q, be placed along the x axis so that it does not experience any net force because of the other two charges? a. 0.187 m
b. -0.187 m
c. 0.200 m
d. -2.99 m
e. 2.99 m

Why can blue light and yellow light combine to produce white light? question 17 options: they are both primary colors of light. they absorb each other's wavelengths. because blue, yellow, and white are primary colors. they are complementary colors of light.

Two steel balls, each of mass m, are welded to a light rod of length l and negligible mass and are initially at rest on a smooth horizontal surface. a horizontal force of magnitude f is suddenly applied to the rod as shown. determine (a) the instantaneous acceleration a of the mass center g and (b) the corresponding rate at which the angular velocity of the assembly about g is changing with time.

You hang a book bag on a spring scale and place the bag on a platform scale so that the platform scale reads 23.7n and the spring scale reads 13.8n. what is the magnitude of the force that earth exerts on the bag?