Η φυσική γύρω μας: η ταχύτητα στη φύση
H ταχύτητα στη φύση
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H ταχύτητα στη φύση
Συνδεσμολογία αντιστατών σε σειρά Παρουσίαση Μία σύντομη παρουσίαση για τους δύο διαφορετικούς τρόπους σύνδεσης αντιστατών σε ένα ηλεκτρικό κύκλωμα: σε σειρά και παράλληλα. Ισοδύναμη αντίσταση: φύλλο εργασίας
Πώς μπορούμε να βρούμε το έργο σταθερής δύναμης; Ένα άλογο που τραβάει μία άμαξα, λέμε ότι παράγει έργο. Ο άνεμος που κινεί ένα ιστιοφόρο, ο εργάτης που σέρνει ένα σακί τσιμέντου, ο παππούς που σπρώχνει μία γλάστρα στην αυλή παράγουν έργο. Λέμε, γενικά, πως μία δύναμη παράγει έργο όταν το σώμα στο οποίο αυτή ασκείται…
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Σε αυτό το άρθρο μπορείς να βρεις μια εισαγωγική παρουσίαση για τη μάζα των σωματων. ΨΗΦΙΑΚΟ ΣΧΟΛΙΚΟ ΒΙΒΛΙΟ Μετρήσεις μάζας — τα διαγράμματα ΜΑΖΑ — ΣΤΟΙΧΕΙΑ ΘΕΩΡΙΑΣ Η μάζα αποτελεί ένα από τα βασικά χαρακτηριστικά μεγέθη κάθε υλικού σώματος. Πώς θα μπορούσαμε να την ορίσουμε; Η μάζα ενός σώματος είναι η ποσότητα της ύλης που…
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Στις απλές περιπτώσεις ηλεκτρικών κυκλωμάτων (π.χ. πηγή, διακόπτης, αντιστάτης) η σχέση μεταξύ τάσης, έντασης του ρεύματος και αντίστασης είναι πάρα πολύ απλή και εκφράζεται από τον νόμο του Ohm. Ωστόσο υπάρχουν συνδεσμολογίες, όπως αυτή της εικόνας, πολύ πιο πολύπλοκες. Για τη μελέτη τέτοιων κυκλωμάτων χρησιμοποιούμε τους κανόνες Kirchhoff (Κίρχοφ). Οι δύο αυτοί κανόνες προκύπτουν από…
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Δραστηριότητα Εδώ θα βρεις online ερωτηματολόγια κατάλληλα για επανάληψη των εννοιών που σχετίζονται με το συνεχές ηλεκτρικό ρεύμα. Τις ερωτήσεις έχει επιμεληθεί ο συνάδελφος Μερκούρης Παναγιωτόπουλος.
Καμπυλόγραμμες κινήσεις: ομαλή κυκλική κίνηση. Περίοδος, συχνότητα, γραμμική και γωνιακή ταχύτητα.
Τι είναι το μήκος και με ποιον τρόπο όμως το μετράμε; Ποια μονάδα μέτρησης χρησιμοποιούμε; Ένα βιντεομάθημα για τη μέτρηση του μήκους και τη μέση τιμή.
Τι είναι η ηλεκτρική αντίσταση ενός διπόλου και πώς μπορούμε να την υπολογίσουμε; ψηφιακο βιβλιο 2.4 Αντίσταση (Ωμική) — Αντιστάτης μικρο παραθυρο στην ιστορια Έχεις ήδη μάθει ότι η διαφορά δυναμικού (τάση) αποτελεί το αίτιο δημιουργίας του ηλεκτρικού ρεύματος. Αυτό σημαίνει πως τα δύο φυσικά μεγέθη τάση και ένταση θα πρέπει να συσχετίζονται ποσοτικά. Ο…
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Μοιάζει παράξενο, όμως οι άνθρωποι άργησαν πολύ να ανακαλύψουν τη φυσική πίσω από την ελεύθερη πτώση των σωμάτων. Eπί δύο χιλιάδες χρόνια περίπου, από τον Αριστοτέλη μέχρι τον Γαλιλαίο, οι άνθρωποι πίστευαν ότι «τα βαρύτερα σώματα πέφτουν πιο γρήγορα». Και πώς να τους κατηγορήσει κάποιος; Η καθημερινή μας εμπειρία και η λογική μας λένε ακριβώς…
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