Respuesta :
Options b and d are best suited for the given statement.
The sources of chemical compounds present in the Europa's ocean are:
1) These can be obtained from the bombardment of Jupiter's intense radiations on the surface of ice present on Jupiter.
2) The chemical energy is also provided by the oxidants that react with the hydrogen by cycling into the ocean water from the icy surface above.
Ultraviolet (UV) is a form of electromagnetic radiation with a wavelength from 10 nm (with a corresponding frequency around 30 PHz) to four hundred nm (750 THz), shorter than that of seen light, but longer than X-rays. UV radiation is found in daylight and constitutes approximately 10% of the total electromagnetic radiation output from the sun. it is also produced by means of electric-powered arcs and specialized lighting, inclusive of mercury-vapor lamps, tanning lamps, and black lights. even though lengthy-wavelength ultraviolet isn't taken into consideration as ionizing radiation due to the fact its photons lack the energy to ionize atoms, it could purpose chemical reactions and reason many substances to glow or fluoresce. consequently, the chemical and biological outcomes of UV are extra than simple heating results, and plenty of sensible programs of UV radiation derive from its interactions with natural molecules.
Brief-wave ultraviolet mildly damages DNA and sterilizes surfaces with which it comes into touch. For humans, suntan and sunburn are acquainted effects of exposure of the skin to UV mild, at the side of an elevated chance of skin cancer. the quantity of UV mild produced with the aid of the solar way that the Earth could no longer be capable of sustaining existence on dry land if most of that might have been no longer filtered out by way of the surroundings.
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