In Ptolemy's view of the universe, a planet moves on an epicycle whose center moves around the Earth on the deferent circle

a. Correct
b. FALSE; Ptolemy put the Sun at the center.
c. FALSE; The planet stays on the deferent circle.
d. FALSE; Earth is at the center of the epicycle.
e. FALSE; Both c and d are correct.

a

Physics & Space Science

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A 2.0-?F capacitor that is initially uncharged is charged through a 50-k? resistor. How long does it take for the capacitor to reach 90% of its full charge?

A) 0.90 s B) 2.2 s C) 0.23 s D) 2.3 s

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What did Rutherford's famous scattering experiment help to prove in his day?

A. The nucleus of an atom is positively charged. B. The nucleus of an atom takes up a large portion of the space in an atom. C. The scattering with the gold foil could either be due to a single interaction with a nucleus or multiple interactions with electrons. D. Alpha particles are neutral and massive. E. Thomson's model was essentially correct.

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Heat is ________

a. a measure of the average kinetic energy of molecules in an object b. a property of an object c. the energy transferred between bodies due to a temperature difference d. the specific heat of an object

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An infinite plane of charge with is tilted at a 45° angle to the vertical direction as shown below. The potential difference, VA?VB, in volts, between points A and B, a 4.50 m distance apart, is ? ?

A. ?7.06. B. ?9.98. C. ?14.11. D. +7.06. E. +9.98.

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