While not created to replace a dog's need for exercise or to quash their curiosity, the K9 Sport Sack will help a pet owner to carry a tired dog or take them on adventures such as
rock climbing or
cycling, where dogs can not typically keep up, Watson
noted.
3 K warming of 15 m depth of
rock on land, assuming density of 2600 kg / m ^ 3 and specific heat of 733 J / (kg * K)(p. 85;
note (also from p. 85)-- for typical soil thermal diffusivity, penetration depth for an annual
cycle is ~ 1.5 m; penetration depth is proportional to the square root of time.