As the mass oscillates on a spring, when is displacement at its maximum and velocity equal to zero? a. when it is partially compressed b. when it is at the equilibrium position c. when it is fully stretched d. when it is at near rest

The de broglie relation λ=h/p can be rewritten in terms of the wave number k as p=kℏ. recall that wave number is defined by k=2π/λ. using the fact that λ=v/f, find the wave numbers k1 and k2 corresponding to frequencies f1 and f2. express your answer as two expressions

The softest and hardest minerals are: softest hardest

An isotope undergoes radioactive decay by emitting radiation that has a –1 charge. what other characteristic does the radiation have?