A violin has a string length of L = 32 cm. The second string of the violin is tuned to the musical note A4 whose frequency is 440 Hz. a.) What is the wavelength of this string’s first normal mode?
b.) What is the wave speed on this string?
c.) The vibrating string sets the air in vibration.
d.) Given that the speed of sound waves in air is 343 m/s, find the frequency and the wavelength of the sound waves in air. Why are wavelengths different on the string and in the air?

As you are trying to move a heavy box of mass m, you realize that it is too heavy for you to lift by yourself. there is no one around to , so you attach an ideal pulley to the box and a massless rope to the ceiling, which you wrap around the pulley. you pull up on the rope to lift the box. use g for the magnitude of the acceleration due to gravity and neglect friction forces. once you have pulled hard enough to start the box moving upward, what is the magnitude f of the upward force you must apply to the rope to start raising the box with constant velocity? express the magnitude of the force in terms of m, the mass of the box.

What is the equation for electrical work?

Employer informs its employees that it will hold a substantial cash prize drawing for each work group at the end of each month in which no employee in the work group sustains a lost-time injury. tyra reports an injury that she sustained while operating a mechanical power press. tyra did not violate any employer safety rules when she sustained her injury. tyra’s injury requires her to miss work for two days. her employer cancels the cash prize drawing for that month for tyra’s work group because of tyra’s lost-time injury. did the employer misuse an incentive program to retaliate against tyra?