solar
Q: The paint used to make lines on roads must reflect enough light to be clearly visible at night. Let…
A: (a) The degree of freedom =n-1=19-1=18 It is a right-tailed test. So the p-value= P(t with df=18…
Q: a b Voa = 12 V
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Q: As shown below, an insulated gold wire is immersed in 466 g of water at 22 °C. The wire is 4.9 cm…
A: The mass of the water is given as, m=466 g (or) m=0.466 kg. The initial temperature of the water is…
Q: COMPARE THE EQUIVALENT YEARLY COST OF AN INCANDESCENT BULB WITH THE L.E.D. BULB THAT WILL EMIT…
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Q: Q1: Compute linear density values for [100] and [111] directions for Silver and Iron.
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Q: In order to lose 1 pound per week, you need to reduce your daily intake by 500 Calories per day. For…
A: In order to lose one pound per week, you need to create a calorie deficit of 500 calories per day.…
Q: A В 100 200 300 400 500 600 700 a (nm) Relative Absorbance
A: a) FALSE molar absorptivity = a / c × L where a = absorbance.…
Q: If the energy received by 5 m2 area in 10 minutes is 4200 kJ, calculate the value of solar constant.
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Q: If an immersion heater heats 300 g of water for 2 minutes and the temperature rises by 30 °C, find…
A: Mass of water is m=300 g=0.3 kg Increase in temperature of the water is Δθ=30oC Specific heat of…
Q: The emissivity of the human skin is 97.0 percent. Use 35.0 °C for the skin temperature and…
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Q: Imagine choosing between two winter jackets. Assume you have access to a heat-generating mannequin…
A: Heat generation: The heat comes from the fact that all isotopes that can be used to make weapons are…
Q: One half of a kilogram of liquid water at 273 K (0 °C) is placed outside on a day when the…
A: The mass of the water = 0.5 kgThe latent heat of water =3.36 x 10^5 joule/kg Thus the total heat…
Q: A very hot object in space is discovered. When it is viewed through an optical telescope, which…
A: A blackbody is considered an ideal object or system that is capable of absorbing all the radiation…
Q: What is the lowest temperature that will cause a blackbody to emit radiation that peaks in the…
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Please estimate the solar cell efficiency of the profile listed below under standard solar illumination. (solar cell area= 2cm?)
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- Calculate the amount of time it would require for 1eV of energy to be absorbed by an atom in a metal located 1m away from a 60-W bulb. Take the area of the atom to be (1x10-20) m2For CCI4, the viscosity at 0 ° C is 1.33 x 10-3 kg m-1 s-1 and the activation energy is 10.9 kJ mol-1? Estimate the viscosity at 30 ° C.An object emits 30 Watts of power. If it were a perfect black body, other things are being equal, it would emit 90 Watts of radiant power. What is the emissivity of the object?
- Find the theoretical Debye temperature of iron (Fe) if the speed of sound in Fe is 5130 m/s and its density and atomic mass is 7860 kg/m³ and 0.05585 kg/mol, respectively. The experimental data of iron is 453 K. Compare your calculated Debye temperature with the experimental data and explain any difference.The reflectivity of silicon at 633nm is 35% and the absorption coefficient is 3.8×105 m¹. Calculate the transmission of a sample with a thickness of 10 µm.The next four questions use this description. Our Sun has a peak emission wavelength of about 500 nm and a radius of about 700,000 km. Your dark-adapted eye has a pupil diameter of about 7 mm and can detect light intensity down to about 1.5 x 10-11 W/m2. Assume the emissivity of the Sun is equal to 1. First, given these numbers, what is the surface temperature of the Sun in Kelvin to 3 significant digits? What is the power output of the Sun in moles of watts? (in other words, take the number of watts and divide it by Avogadro's number) Assuming that all of the Sun's power is given off as 500 nm photons*, how many photons are given off by the Sun every second? Report your answer to the nearest power of 10 (e.g. if you got 7 x 1024, give your answer as 25).
- The figure below depicts spectral reflectance measurements for three different materials: a green leaf from a healthy plant, a sheet of shiny blue paper, and the palm of a human hand. The measurements are labeled 1 (black line), 2 (red line), and 3 (blue line). Match the measurements to the most appropriate material typeTable 3.4: Resistivity of aluminum Wire Radius Wire Radius (mm) (m) Cross-sectional Area, r² (m²) Wire Resistance Length (Ohms) (m) Slope of Resistance vs. Wire Length:_ Resistivity of aluminum (Slope x Cross-sectional Area): % Error (Theoretical resistivity of aluminum is 2.65x10-8 Ohm-m): 2. Fill in the summary Table 4 below with the experimental resistivities calculated from the slopes of your graphs, and the % error: