Physics, 26.06.2019 16:30 DakotaOliver
Excessive exposure to sunlight increases the risk of skin cancer because some of the photons have enough energy to break chemical bonds in biological molecules. these bonds require approximately 250–800 kj/mol of energy to break. the energy of a single photon is given by e=hc/λ where e is the energy of the photon in j, h is planck’s constant (6.626×10−31 j⋅s), and c is the speed of light (3.00×108 m/s). determine which kinds of light contain enough energy to break chemical bonds in biological molecules by calculating the total energy in 1 mol of photons for light of each wavelength. infrared light (1500 nm) visible light (500 nm) ultraviolet light (150 nm)
Answers: 2
Physics, 22.06.2019 14:30, trevorhenyan51
Which compound is held together by the electrostatic force between two ions? a. co2 b. cci4 c. h2s d. mgf2
Answers: 1
Physics, 22.06.2019 16:00, ggdvj9gggsc
Suppose a soccer ball is kicked from the ground at an angle 20.0º above the horizontal at 8.00 m/s. the y-velocity is determined to be 2.74 m/s. how long will the ball be in the air? assume the ball lands at the same height at which it was kicked.
Answers: 2
Excessive exposure to sunlight increases the risk of skin cancer because some of the photons have en...
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