Bernstein, Aaron, Naturwissenschaftliche Volksbücher, Bd. 17-21, 1897

Table of figures

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            <s xml:id="echoid-s4111" xml:space="preserve">
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            ſelbe in den Weltraum hinein. </s>
            <s xml:id="echoid-s4112" xml:space="preserve">Daher verliert die Uhr die
              <lb/>
            Kraft; </s>
            <s xml:id="echoid-s4113" xml:space="preserve">aber die Kraft iſt nicht verloren. </s>
            <s xml:id="echoid-s4114" xml:space="preserve">— Auch ein Pendel
              <lb/>
            giebt die ihm durch Aufheben erteilte Kraft in der Form von
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            Wärme aus, das heißt, es verwandelt ſich die durch Reibung
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            zerſtörte äußerliche Bewegung in eine Inner-Bewegung im
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            Pendel, im Aufhängepunkt derſelben und in der umgebenden
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            Luft. </s>
            <s xml:id="echoid-s4115" xml:space="preserve">— Und was in dieſen Fällen im Kleinen und im Un-
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            ſcheinbaren geſchieht, das geht auch in gewaltigen Erſcheinungen
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            im großen, weiten Weltall vor ſich, und darum wollen wir uns
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            denn auch in dieſe weiteſten Fernen hineinwagen und dort
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            nachſpüren, was unſere Denker von der Kraft, von der Be-
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            wegung und von der Wärme und von dem Weltleben im
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            großen und ganzen Merkwürdiges und Lehrreiches ausgeſonnen
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            haben.</s>
            <s xml:id="echoid-s4116" xml:space="preserve"/>
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        <div xml:id="echoid-div184" type="section" level="1" n="120">
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            <emph style="bf">X. Wie ſich im Weltraum Bewegung in Wärme</emph>
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            <emph style="bf">verwandelt.</emph>
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          <p>
            <s xml:id="echoid-s4117" xml:space="preserve">Aus dem Geſetze der Erhaltung der Kraft erklärt ſich
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            nicht nur ſo manche Erſcheinung, z. </s>
            <s xml:id="echoid-s4118" xml:space="preserve">B. </s>
            <s xml:id="echoid-s4119" xml:space="preserve">beim Fall der Meteor-
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            ſteine, ſondern es läßt ſich jetzt auch der Grad der Hitze ziem-
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            lich genau angeben, in welche jedes Lot einer ſolchen Maſſe
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            geraten muß, wenn es durch Eintritt in die Erdatmoſphäre
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            eine beſtimmte Summe von Geſchwindigkeit einbüßt.</s>
            <s xml:id="echoid-s4120" xml:space="preserve"/>
          </p>
          <p>
            <s xml:id="echoid-s4121" xml:space="preserve">Im allgemeinen kann man annehmen, daß einige der
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            kleinen Maſſen, welche unſere Sternſchnuppen, Leuchtkugeln
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            und Meteore bilden, urſprünglich eine Geſchwindigkeit in ihrem
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            Umlauf um die Sonne beſitzen, die der Geſchwindigkeit der
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            Erde ſehr nahe kommt. </s>
            <s xml:id="echoid-s4122" xml:space="preserve">Sie beträgt hiernach beinahe fünf
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            Meilen in der Sekunde.</s>
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