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- Manufacturers of headache remedies routinely claim that their own brands are more potent pain relievers than the competing brands. Their way of making the comparison is to compare the number of molecules in the standard dosage. Tylenol uses 325 mg of acetaminophen (C8H9NO2) as the standard dose, while Advil uses 2.00 x 102 mg of ibuprofen (C13H1802). Find the number of molecules of pain reliever in the standard doses of (a) Tylenol and (b) Advil. (a) Number Units (b) Number Units1. (a) What is the average kinetic energy in joules of a hydrogen atom on the 5500 °C surface of the Sun? The Boltzmann's constant is k=1.38×10-23 J/K J KE av (b) What is the average kinetic energy of a helium atom in a region of the solar corona where the temperature is 6 x 105⁰K? KE Fav JThe density of Si is 2.3 g/cm³. Assume you are making square mc-Si wafers, 15 x 15 cm², 180 µm thick, leading to solar cells of 16% efficiency (assume wafers have 16% efficiency also). Assume 150 µm kerf losses (due to slicing) and sun-- light of 1kW/m². How much power can you generate per kilogram of Si (i.e., what is the kWp for wafers per kilogram of Si ingot)?
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- When working on a PHYS 1510 weekly assignment, a student decided to get a medium double double coffee from Tim Hortons (a coffee made with two creams and two sugars). After drinking it, the student looked up the nutritional value of the drink, and was shocked to find it was listed as 230.0 kcal (230.0 nutritional calories). After drinking the coffee, they weighed 87.88 kg. To work off all the calories, the student decides to climb the stairs in their building. How many floors do they need to climb to burn off the entire drink? (do not include units) Assume all floors are 3.00 m apart from each other. Assume all nutritional energy is fully converted to potential energy. 1 kcal = 4184 JCompute the energy consumption in units of joules per year, gigawatts (GW), and watts per person as (a) fuel, (b) food, and (c) solar radiation for a country of population density 20 person/km2, an area of 1 million km2, and a fuel energy consumption rate of 250 GJ per person per year. Solar radiation reaching the ground is approximately 150 W/m2. The average person consumes food containing 2000 “calories” per day (1 calorie = 4182 J).As radioactive plutonium isotopes decay, they generate heat as a byproduct. Pu-239 generates 1.9W/kg of heat. How much heat will 1.25molof Pu-239 release after decaying for three hours? Express this quantity in units of calories. Assume Pu-239 has a molecular weight of 244g/mol.