A jump landing model divides the body into three segments: calf, thigh, and upper body. The horizontal ankle marker position is 0.200 m. The knee, hip, and suprasternale horizontal marker positions are given (see Variables in Excel file). The calf center of mass location is 0.420 from the knee to the ankle, the thigh center of mass location is 0.400 from the hip to the knee, and the upper body center of mass location is 0.440 from the suprasternale to the hip. The relative mass of the calf is 0.110, the relative mass of the thigh is 0.260, and the relative mass of the upper body is 0.630. What is the calf segment horizontal center of mass

We want to calculate the total metabolic heat generated by a singing canary taking into account heat transfer by radiation, convection and exhaling air. the air temperature is 20 oc, canary’s body internal and surface temperature is 33oc, external body surface convective heat transfer coefficient is 25.2 w/m2 .k, temperature difference between the inhaled and exhaled air is 4.3 oc, the ventilation rate is 0.74 cc of air per second, specific heat of air is 1.0066 kj/kg.k and density of air is 1.16 kg/m3 . assume the canary’s body to be a cylinder with 7 cm diameter and 9 cm length, and heat exchange is from the side as well as the top and bottom of cylinder. calculate 1) the net rate of heat lost by radiation, assuming heat gained by the bird through radiation from the surroundings is 11.5 w; 2) rate of heat transferred by convection to the surrounding air; 3) rate of heat transferred in the exhaling air without considering any internal evaporation; 4) total metabolic power.

Which is not a characteristic of a heat pump? a. it is used in air conditioners. b. it uses a refrigerant. c. it requires no work. d. it reverses the normal flow of thermal energy.

The heliocentric and the geocentric models of the solar system included these central principles