Physics, 03.07.2019 00:20 erenackermanlevijaeg
Potential energy in common problems: there are certain systems that show up again and again in physics, because they are useful models for other phenomena. it is thus to store key equations for these systems in long-term memory. look up or figure out the formula for the potential energy u of the following systems: (a) an object of mass m located a distance y above the ground (which we will assume to be at zero potential energy, for convenienc. if it , assume that y is much smaller than the radius of the earth. (b) a spring with stiffness k that has been displaced from equilibrium a distance δ . (c) a pendulum consisting of a mass m attached to a string of length l, and the string has been pulled back from equilibrium through an angle θ. assume that the string is hanging straight down and the potential energy is zero when θ 0. i want the exact formula for the potential energy of this system, not the quadratic approximation! (d) a satellite of mass m located a distance r from the center of the earth. (e) two point charges ı and g2 separated by a distance r.
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Physics, 22.06.2019 11:00
Which of the following are guidelines to follow for obtaining accurate observations
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Physics, 22.06.2019 12:30
An engine undergoes a cycle as shown in the diagram. during a complete cycle the work done by the gas is 28.5×103 j and the energy transferred thermally out is 99.4×103 j. there are 1.5×1024 gas molecules and they have three active degrees of freedom. 6. (6 pts) during which process(es) is energy transferred thermally into the gas? a. 1→2 b. 2→3 c. 4→1 d. 1→2 and 4→1 e. none of the above
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Physics, 22.06.2019 16:30
In the nineteenth century, gregor mendel first determined some basic rules of genetics that have been observed throughout all types of life. no observations have disproved these basic rules of genetics. charles darwin developed the idea of biological evolution around the same time, but he was unaware of mendel’s discoveries in genetics. over a century later, darwin’s idea of evolution was modified in order to incorporate mendel’s rules of genetics along with the other evidence that darwin had used. what is most likely the relationship between mendel’s rules of genetics and darwin’s idea of biological evolution? a.)mendel’s genetics states laws that are now part of the theory of biological evolution.b.)biological evolution states laws that are part of mendel’s theory of genetics.c.)mendel’s genetics replaced darwin’s entire concept of biological evolution.d.)biological evolution is a law that explains why all genetics exist.
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Potential energy in common problems: there are certain systems that show up again and again in phys...
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