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How does E = mC2 apply to understanding how the Sun is powered?
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- This picture shows a radio meter. It is designed to be placed in a sunny window. One side of each thin blade of the radio meter is painted black, and the other side is painted white. The suns rays strike the blades, in the device begins to spin. The device is powered by which kind of energy?(2009)Our Sun has a surface temperature of about 5800 K. Find the emitted power per square meter of peak intensity for a similar star with 4600 K that emits thermal radiation. Express your answer in scientific notation and with three significant figures.How many watts of radiation does a 1-meter-square region of the Sun’s spot emit, at a temperature of 5000 K? How much would the wattage increase if the temperature of the spot were twice as much, 10 000 K?
- Shortwave radio is broad between 3.50 and 29.7MHz. To what range of wavelengths does this correspond? Why do you suppose this part of the spectrum is called shortwave radio?(a) The blackbody radiation emitted from a furnace peaks at a wavelength of 4.5 10-6 m (0.0000045 m). What is the temperature inside the furnace? (in K) (b) The charger cord used to recharge a cell phone contains a transformer that reduces 120 V AC to 4 V AC. For each 1,400 turns in the input coil, how many turns are there in the output coil? (Round your answer to at least one decimal place.)A high energy electron enters earth’s atmosphere from space and comes straight down toward a spot on the equator. What does its trajectory look like?
- How much would thye wattage increase if the temperature was doubled? ( Use the Stefan-Boltzman law) How much energy is produced when the Sun converts 1 kg. of its mass into energy?If the sun is a distance of 1.5 x 10^8 km from Earth, how long does it take sunlight to reach Earth if it moves at 3.0 x 10^8 m/s?Scientists plan to place detection devices outside Earth's atmosphere to detect radiations from a star. Which of these best explains the type of detection device that the scientists would use? A radar, because high-frequency microwaves are limited to the region outside Earth's atmosphere Special cameras, because high-frequency UV rays are emitted by objects at very high temperatures Special cameras, because high energy UV rays are emitted by objects having very high mass or A radar because high energy microwaves are produced from very hot objects
- we were given the answer of 60mJ but I'm not sure how that came about.The most massive stars in the Universe have a surface temperature that can reach over 50 000 K. Life on planets like Earth cannot exist at 1AU from such stars, it's too hot. Find the emitted power per square meter of peak intensity for a similar star with 43000 K that emits thermal radiation. Express your answer to two significant figures.What is the frequency of the EM wave emitted most strongly by a glowing element on a stove with temperature 1,568 K?