Asource of sound is kept in a jar in a vacuum. air is slowly introduced in to the jar. what happens to the sound coming out of the jar? a the loudness of the sound increases gradually. b the loudness of the source decreases gradually. c the sound remains unchanged. d the pitch of the sound increases gradually. e the pitch of the sound decreases gradually.

Which property of fossils allow scientists to determine the relative rock ages..

Need in all of themmm only answer if you know plsssss

Asteam power plant operates on an ideal reheat rankine cycle between the pressure limits of 15 mpa and 10 kpa. the mass flow rate of steam through the cycle is 12 kg/s. steam enters both stages of the turbine at 500°c. if the moisture content of the steam at the exit of the low-pressure turbine is not to exceed 10 percent, determine (a) the pressure at which reheating takes place, (b) the total rate of heat input in the boiler, and (c) the thermal efficiency of the cycle. also, show the cycle on a t-s diagram with respect to the saturation lines. (2.15 mpa; 45.0 mw; 42.6%)