Sketch possible interatomic potentials as a function of interatomic separation for two materials A and B. Material A has a high melting temperature and vaporization temperature and a high elastic modulus. Material B has a low melting and vaporization temperature and a low elastic modulus.
What will be an ideal response?
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Faraday's law of induction states that the emf induced in a rectangular loop of wire is proportional to
A. the magnetic flux. B. the time variation of the magnetic flux. C. current divided by the time. D. the magnetic flux density times the area of the loop.
Energy and Momentum: A firecracker explodes in midair and breaks up into many fragments. Which of the following statements are true regarding conditions immediately before and immediately after the explosion?I. The total momentum of the fragments is equal to the original momentum of the firecracker.II. The total kinetic energy of the fragments is equal to the original kinetic energy of the firecracker.
A. Statement I only B. Statement II only C. Both Statement I and Statement II D. Neither statement is true.
What evidence is there to prove that there has been no tectonic movement on Mars?
a. The meteorites that have landed on Earth b. The "blueberries" found by rover Opportunity c. The huge size of the Martian volcanoes d. The presence of ice beneath the surface e. The large number of polygonal cracks on the surface
Spicules
a. are found in the photosphere. b. are magnetic disturbances that push large loops of material off the solar surface. c. are responsible for twisting the solar magnetic field and causing the sunspot cycle. d. appear in the corona near the north and south poles of the Sun during a total solar eclipse. e. are visible in filtergrams of the solar chromosphere.