A strange fluid completely fills the pipe if radius 1m through which it flows with speed velocity 1/2-In 3 m/s. if the density varies radially according to P(r)= 100/×{1-2r},what is the mass flow rate​

How is sound energy produced a. vibrating objects b. objects being heated c. temperature differences d. stationary objects

An insulated 40 ft^3 rigid tank contains air at 50 psia and 120°f. a valve connected to the tank is now opened, and air is allowed to escape until the pressure inside drops to 25 psia. the air temperature during this process is kept constant by an electric resistance heater placed in the tank. determine the electrical work done during this process.

In this thread, i would like you to comment on the nature of light and how operation of telescopes. light has a duality of a particle and a wave; which one affects your life? also how does light interact with optics inside telescopic systems? answer these questions in two paragraphs. then respond the another students response.