Please Help! What is the mechanical advantage of a simple block and tackle with one rope?

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The dissociation energy of a molecule is the energy required tobreak apart the molecule into its separate atoms. the dissociationenergy for a particular molecule is 5.48 x 10-18 j.suppose that this energy is provided by a single photon. determinethe (a) wavelength and (b) frequency of the photon

Give me a example of a decomposer. explain what would happen if decomposers were absent from a forest ecosystem

Which type of energy is transferred by convection currents?