Which wave has the longest wavelength?

Explain why the aperture of the spherical mirror should be small compared to the radius of curvature of the mirror.

The solid that is formed and usually sinks to the bottom of a solution is the

Suppose that three astronomical objects, 1, 2, and 3 are observed to lie on a line, and the distance from object 1 to object 3 is d. object 1 has four times the mass of object 3, and seven times the mass of object 2. find the distance between objects 1 and 2 for which the net force on object 2 is zero.