what is the total power P radiated by the sun given the inensity of sunlight at the earth if I, the earth sun distance is R and the radius of the earth is r. Do not include any other values besides those listed
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what is the total power P
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- Answer the following by filling the blank: During a bout with the flu, an 80-kg person ran a fever of 39 oC. Consider that the specific heat of any human body is 3470 J/kg K, how much energy does the body need to burn to reach the fever temperature? The answer (in fundamental SI unit) is ___________ (type the numeric value only, dont use scientific notation)The power radiated by the Sun is 3.83 × 1026 W (The Watt is the SI unit of power, 1 W = 1 J s-1). Given that the power radiated by the Sun is the rate at which energy is radiated by the Sun per unit time, write down a formula relating the total energy radiated by the Sun, E, during a time interval T, and the radiated power, P. Use your formula and the information given above to calculate the total energy radiated by the Sun in exactly 4 hours. Give your answer to 3 significant figures and write it using scientific notation.Please asap
- Assume our atmosphere absorbs 23% of the incoming solar radiation, and that the distance from the Earth to the Sun is 1.5 × 1011 m. From this information, what do you expect is the total power output of the sun? [IMPORTANT: to express a number like 2 × 1021, type 2e21] Please enter a numerical answer below. Accepted formats are numbers or "e" based scientific notation e.g. 0.23, -2, 1e6, 5.23e-8 Enter answer here W Part b How much solar energy do you absorb after sunbathing for an hour? Assume your skin has an exposed surface area of approximately 1.2m², and you absorb 50% of the incident energy. Give your answer in megajoules.Dimensional formula for thermal conductivity is (here K denotes the temperature): 1) MLT–3 K–1 2) MLT–2 K–2 3) MLT–2 K 4) MLT–3 KThis was wrong. Can you solve this again with these numbers? What is the root mean square velocity, vrms, for Hydrogen molecules (H2) at 20oC? Hint: How many amu does an H2 molecule contain. 1 amu = 1.67 x 10-27 kg Boltzman's Constant, k = 1.38 x 10-23 J/K Give your answer in m/s to 4 significant figures (NO DECIMALS)
- Verify the normalization equation 0f(v)dv=1 In doing the integral, first make substitution u=m2kBTv=vvp. This "scaling" transformation gives you all features of the answer except for the integral, which is a dimensionless numerical factor. You'll need the formula 0x2e x 2dx= 4 to find the numerical factor and verify the normalization.`> In this problem you will consider the balance of thermal energy radiated and absorbed by a person. Assume that the person is wearing only a skimpy bathing suit of negligible area. As a rough approximation, the area of a human body may be considered to be that of the sides of a cylinder of length L = 2.0 m and circumference C = 0.8 m. For the Stefan-Boltzmann constant use o= 5.67 x 10-8 W/m²/K4 Part C Now calculate Por, the thermal power absorbed by the person from the thermal radiation field in the room, which is assumed to be at Troom = 20°C. If you do not understand the role played by the emissivities of room and person, be sure to open the hint on that topic. Express the thermal power numerically, giving your answer to the nearest 10 W. View Available Hint(s) Por= Submit Part D [-] ΑΣΦ. Pnet = 17] ΑΣΦ Find Paet, the net power radiated by the person when in a room with temperature Troom= 20°C. Express the net radiated power numerically, to the nearest 10 W. ▸ View Available Hint(s)…Conceptual se You need to measure the height of a small tree. Your metal measuring tape has been sitting in the sun on a hot summer day while your coworker's measuring tape has been in an air-conditioned car.
- A) Estimate the total solar heating absorbed by the Earth every second. Assume 36% of the incoming solar radiation is reflected by clouds and lost. You can assume that the Earth intercepts sunlight with an effective area of πr2 where r is Earth’s radius. B) Estimate the total heat lost by the Earth as infrared radiation every second. Assume Earth has an effective temperature of 252 K (-21 C).The settling rate of particulates in the air follows Stokes' law. If particulates of diameter of 10 nm emitted in the atmosphere are found to settle out after 2 days, how long would it take particulates of the same material with a diameter of 5 nm to settle out if they are emitted from the same source?What is the net heat current in radiation of an Ice cube at 0 °C if the surrounding air is at 20°C? The ice cube has sides of length 2.50 cm, the emissivity of ice is 0.96 and the Stefan-Boltzmann constant is o = 5.67 x 10-8 Watts/m2Kª. Is the heat flow out or into the ice cube, explain?
