Physics, 05.02.2020 13:49 smonahan2023
Which would you most expect to be an unstable atom?
a carbon (c) atom with 6 protons and 6 neutrons
an iron (fe) atom with 26 protons and 27 neutrons
a helium (he) atom with 2 protons and 2 neutrons
a curium (cm) atom with 96 protons and 85 neutrons
Answers: 2
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Rank the torques on the five doors shown in the figure above from least to greatest. note that the magnitude of all the forces is the same
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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.
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Which is the best predictor of the radioactive nature of an isotope? o the proton-to-electron ratio the neutron-to-proton ratio o the neutron-to-electron ratio the electron-to-proton ratio
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Physics, 22.06.2019 07:00
Suppose while hauling rocks, you accidentally drop one. it breaks apart in flat, planar sections. what type of rock did you just drop? 20 points
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Which would you most expect to be an unstable atom?
a carbon (c) atom with 6 protons an...
a carbon (c) atom with 6 protons an...
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