Which OSRF application checks to see if a username has been registered in up to 22 different e-mail providers

You should either take it to a phone repair shop or try and fix it yourself, look at wiki hows on fixing your phone from water damage.

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Hypothesis: volumes of both figures are equal.the volume of  figure 1 is: .the volume of figure 2 is: .since , you can conclude that and . so, .volumes of figures are equal only when an angle in the basis is right (then figures will be the same), in another cases volume of figure 1 is less than volume of figure 2.the hypothesis was not correct in all cases.