Physics, 20.11.2019 23:31 ryleigh1780
Aristarchus measured the relative sizes of the earth, moon, and sun using eclipses and phase timings. since the moon is smaller than the earth and orbits the earth and the earth is smaller than the sun, he deduced that the earth must orbit the sun. this last phrase is what part of the scientific method?
a) observation.
b) theory.
c) prediction based on theory.
d) observation of prediction.
e) confirm/refute/modify theory.
Answers: 3
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Agas contained within a piston-cylinder assembly undergoes three processes in series: process 1ïƒ 2: compression with pv= constant from 1 bar and 1 liter to 4 bar. process 2ïƒ 3: constant pressure expansion to 1 liter. process 3ïƒ 1: constant volume calculate the pressure and volume at each state, and sketch the processes on a p-vdiagram labeled with pressure and volume values at each numbered stat
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The atoms in a nickel crystal vibrate as harmonic oscillators with an angular frequency of 2.3 × 1013 rad/s. the mass of a nickel atom is 9.75 × 10-26 kg. what is the difference in energy between adjacent vibrational energy levels of nickel? (h = 6.626 × 10-34 j • s, , 1 ev = 1.60 × 10-19 j)
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Physics, 22.06.2019 17:00
If a negatively charged particle is placed at rest in an electric potential field that increases in the positive x-direction, what will the particle do? a. accelerate in the positive x-direction b. remain at rest c. accelerate in the negative x-direction
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