Three thin lenses in contact have a combined focal length of 15 cm. When third lens is removed, the combined focal length becomes cm. The third lens is.

Drag each item into the proper state of matter category.

Which is the best predictor of the radioactive nature of an isotope? o the proton-to-electron ratio the neutron-to-proton ratio o the neutron-to-electron ratio the electron-to-proton ratio

If the force applied to an object remains constant, is more power needed for the object to move faster ? explain