A student stands on a chair. The forces acting on her or him are supplied by gravity acting downward and by the ______________ acting upward

Fill in the blank(s) with correct word


chair

Physics & Space Science

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Molecular Vibration: If a diatomic quantum mechanical vibrator in its ground state has energy E, what is its energy in its second state above the ground state?

A. E. B. 3E. C. 5E. D. 7E. E. 9E.

Physics & Space Science

Mass on a Spring: A 4.8-kg block attached to an ideal spring executes simple harmonic motion on a frictionless horizontal surface. At time t = 0.00 s, the block has a displacement of -0.90 m, a velocity of -0.80 m/s, and an acceleration of +2.9 m/s2. The force constant (spring constant) of the spring is closest to

A. 15 N/m. B. 14 N/m. C. 13 N/m. D. 12 N/m. E. 11 N/m.

Physics & Space Science

Faraday's Law: As shown in the figure, a large round loop of 269 turns and radius 67.0 cm carries a current of I = 78.0 A. A small square loop of 31.0 turns and 1.00 cm on a side is placed at the center of the large loop. If the current in the large loop drops to 0.00 A in 0.0470 s, find the induced emf in the small loop. The square loop is small enough that you can assume that the magnetic field in its region is uniform and equal to the magnetic field at the center of the round loop. (?0 = 4? × 10-7 T ? m/A)

Fill in the blank(s) with the appropriate word(s).

Physics & Space Science

A neutron star is

A) the remains of a star that died in a massive star supernova (if no black hole was created). B) the remains of a star that died by expelling its outer layers in a planetary nebula. C) a star made mostly of elements with high atomic mass numbers, so that they have lots of neutrons. D) an object that will ultimately become a black hole.

Physics & Space Science