If light with = 20 nm strikes potassium, what is the maximum kinetic energy Kmar of the ejected electrons? Give your answer to 2 significant figures.
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- What is the maximum velocity of electrons ejected from a material by 61 nm photons, if they are bound to the material by 4.79 eV?This question relates to the practicality of searching for intelligent life in other solar systems by detecting their radio broadcasts (or aliens find us from ours). The closest stars are 4 light years away from us. How far away must you be from a 460 kHz radio station with power 50.0 kW for there to be only one photon per second per square meter? Assume that the photons spread out spherically. The area of a sphere is 4??24πr2. b) How many lightyears away is this?O https://www-awu.aleks.com/aiek ROEqmvAnknhdcHJmAch Blackbody b Answered: Decide. Convert grams Calc... * Convert hertz (Hz] t. G VidQuiz: Trans. In B... Syllabus: 1A Blake F O ELECTRONIC STRUCTURE AND CHEMICAL BONDING Understanding the meaning of a de Broglie wavelength Imagine an alternate universe where the value of the Planck constant is 6.62607 J·s. In that universe, which of the following objects would require quantum mechanics to describe, that is, would objects would act like everyday objects, and be adequately described by classical mechanics? object quantum or classical? A car with a mass of 1100. kg, 4.0 m long, moving at O classical 112.0 km/h. O quantum A grain of sand with a mass of 205 mg, 795. um wide, moving at 6.00 mm/s. O classical O quantum An eyelash mite with a mass of 13.6 ug, 205 um wide, moving at 29. um/s. O classical O quantum An atom with a mass of 1.0 x 10-25 kg, 56. pm wide, moving at 222. m/s. O classical O quantum Explanation Check 72022 McGraw Hill…