Physics, 22.02.2021 22:30, Reggie101127
Occasionally, the electric circuit that produces a coordinated pumping of blood from the four chambers of the heart becomes disturbed. Ventricular fibrillation can occur-random muscle contractions that produce little or no blood pumping. To stop the fibrillation, two defibrillator pads are placed on the chest and a large current (about 20 amps) is sent through the heart, restarting its normal rhythmic pattern. The current lasts 5 msms and transfers 380 JJ of electric energy to the body. Find the potential difference between the defibrillator pads.
Answers: 2
Physics, 21.06.2019 23:00, desiwill01
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
Physics, 22.06.2019 00:30, torrejes241
In positive numbers less than 1, the zeros between the decimal point and non zero are significant
Answers: 2
Physics, 22.06.2019 12:50, starr3971
Air is contained in a variable-load piston-cylinder device equipped with a paddle wheel. initially, air is at 400 kpa and 17°c. the paddle wheel is now turned by an external electric motor until 75 kj/kg of work has been transferred to air. during this process, heat is transferred to maintain a constant air temperature while allowing the gas volume to triple. calculate the required amount of heat transfer in kj/kg.
Answers: 2
Occasionally, the electric circuit that produces a coordinated pumping of blood from the four chambe...
Mathematics, 18.05.2021 06:00
Biology, 18.05.2021 06:00
Business, 18.05.2021 06:00