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1. Transcrie enunturile de mai jos pe caiet şi completează...
Physics, 21.02.2021 16:00 tomuchsaucecj
Verifică-ti cunoştinţele
Exersează
1. Transcrie enunturile de mai jos pe caiet şi completează spațiile punctate;
a) Corpurile care au proprietatea de a atrage corpuri usoare se află în starem
Corpurile neelectrizate sunt corpuri
b)... caracterizează gradul de electrizare a corpului.
c) Sarcina electrică a unui corp neutru este egală cu
d) în urma frecării cu o bucată de țesătură, tubul de plastic se u
e) Bastonașul de sticlă frecat cu o țesătură de mătase este încărcat cu sarcină
electrică
f) Sarcinile electrice de... se atrag, iar cele de... se resping,
Answers: 3
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Aphoton is absorbed by an electron that is in the n = 3 state of a hydrogen atom, causing the hydrogen atom to become ionized. very far away from the nucleus, the released electron has a velocity of 750,000 m/s. what was the wavelength of the absorbed photon?
Answers: 2
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Two identical stars with mass m orbit around their center of mass. each orbit is circular and has radius r, so that the two stars are always on opposite sides of the circle. (a) find the gravitational force of one star on the other. (b) find the orbital speed of each star and the period of the orbit. (c) how much energy would be required to separate the two stars to infinity?
Answers: 1
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Which of these has some mechanical energy? a. an atom b. heat inside earth c. a book on a shelf d. the fire from a lit match
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