You're working for the summer with an ornithologist who knows you've studied physics. She asks you for a noninvasive way to measure birds' masses. You propose using a bird feeder in the shape of a 46-cm-diameter disk of mass 377 g, suspended by a wire with torsional constant 5.4 Nm/rad.

Two birds land on opposite sides and the feeder goes into torsional oscillation at 2.4 Hz.

Assuming the birds have the same mass, calculate the mass of a single bird.

Please report your mass in grams to 1 decimal place.