I need help with these 2 questions.

A string of length 0.800 m is vibrating at Part A 100 Hz in its second harmonic and producing sound that moves at 340 m/s. What is true about the frequency and wavelength of this sound? Select all that apply. O The frequency of the sound is 100 Hz. The wavelength of the sound is 3.40 m. The wavelength of the sound is 0.800 m. O The frequency of the sound is 425 Hz.A concrete block is hung from an ideal Part A spring that has a force constant of 100 N/m. The spring stretches 0.130 m. What is the mass of the block? Enter your answer in kilograms. Templates Symbols undo redo reset keyboard shortcuts help, kg Submit Request Answer Part B What is the period of oscillation of the block if it is pulled down 1.0 cm and released? Enter your answer in seconds. Templates Symbols undo redo reset keyboard shortcuts help, T= Submit Request Answer Part C What would be the period of oscillation if the block and spring were placed on the moon? Enter your answer in seconds. emplates Symbols undo redo reset keyboard shortcuts help, T = S Submit Request