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Physics, 21.06.2019 22:00
Bob camina 200 m sur, luego trota 400 m suroeste, luego camina 200 m en una direcciĂłn 30? norte del este. a. dibuje una gráfica de los movimientos de bob. use una regla y transportador. b. use mĂ©todo gráfico y analĂitico para hallar el desplazamiento total que bob recorriĂł. (magnitud y direcciĂłn) c. compare los resultados obtenidos por el mĂ©todo gráfico y analĂtico. (por ciento de diferencia).
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Physics, 21.06.2019 23:00
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.
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Physics, 22.06.2019 05:00
Aperson walking 1 mile everyday for exercise, leaving her front porch at 9: 00 am and returning to her front porch at 9: 25 am. what is the total displacement of her daily walk? a) 1 mileb) 0c) 25 minutes d) none of the above
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Physics, 22.06.2019 05:00
Wavelength,frequency,and energy are related.what happens to a wave as it’s wavelength gets shorter?
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