I need help please!!

Newton's law of universal gravitation states that the force f between two masses, m1 and m2, is given below, where g is a constant and d is the distance between the masses. find an equation that gives an instantaneous rate of change of f with respect to d. (assume m1 and m2 represent moving points.)

What type of light does this light bulb produce most (i. e. at what wavelength does the spectrum have maximum intensity)?

Which quantities are scalars? choose all that apply a. distance b. speed c. acceleration d. velocity