Which of the following is true about the relationship between the energy gap (DE) between the spin states for a 1H nucleus and the strength of the external magnetic field?A. they are inversely proportionalB. they are directly proportionalC. there is no relationshipD. the magnetic field is slightly lessE. none of these

Which of these properties, used alone, would be least useful in identifying most minerals? a. color b. luster c. streak d. density

Which theory was contradicted by experiments with the photoelectric effect? light spreads out after it passes through a small opening. as soon as light strikes metal, electrons will be ejected. visible light, regardless of color, will cause the ejection of electrons when striking metal. the kinetic energy of ejected electrons depends on the frequency of light that strikes the metal.

All forces cause motion? true or false