Two loudspeakers emit sound waves along the x-axis. the sound has maximum intensity when the speakers are 19 cm apart. the sound intensity decreases as the distance between the speakers is increased, reaching zero at a separation of 29 cm.

what is the wavelength of the sound?
express your answer using two significant figures.
\lambda =

{\rm cm}

part b
if the distance between the speakers continues to increase, at what separation will the sound intensity again be a maximum?
express your answer using two significant figures.

{\rm cm}

The respiratory system removes oxygen and water from the body. select the best answer from the choices provided t f

Consider a double atwood machine constructed as follows: a mass 4m is suspended from a string that passes over a massless pulley on frictionless bearings. the other end of this string supports a second similar pulley, over which passes a second string supporting a mass of 3m at one end and m at the other. using two suitable generalized coordinates, set up the lagrangian and use the lagrange equations to find the acceleration of the mass 4m when the system is released. explain why the top pulley rotates even though it carries equal weights on each side.

5400 j of energy are given off when a 50 g of aluminum pan changes temperature. does the temperature of the pan increase or decrease and by how much?