Physics, 23.01.2020 17:31 alexacarillo
Little joey jumps into a pool on a cool fall morning how can we describe the direction of the energy transfer and temperature changes between joey and the water is it
a) energy is transferred from joey to the water. the temperature of the water increases
b) energy is transferred from the water to joey. the temperature of the water increases
c.) energy is transferred from the water to joey. the temperature of the water decreases.
d) energy is transferred from the joey to the water. the temperature of the water decreases
answer which is a b c or d no really long weird explanation that gets the answers wrong
Answers: 1
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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.
Answers: 2
Little joey jumps into a pool on a cool fall morning how can we describe the direction of the energy...
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