stakeout 新宿 Experience had taught him that

Experience had taught him that it was more efficient to allocate his attention with certain "weights" in mind

If the densities are the same

the buoyant force on an object is equal to the weight of the fluid displaced by the object

Cut off from the outside world

stakeout 新宿 Experience had taught him thatT Just as Jake yawned, Emma, holding two coffee cups, tapped the car window with her elbow, a thin light like glass before sunset shining behind her. Jake lowered his feet from the dashboard and opened the passenger door. "Late, aren't we? While I've been wearing out my nerves, have you been off vacationing?" he quipped. "Do great detectives yawn when their nerves wear thin?" Emma retorted, handing over one of the cups. "Isn't that how it is for you?"