Below the Curie temperature barium titanate is ferroelectric, and above the Curie temperature barium titanate is _________.
Fill in the blank(s) with the appropriate word(s).
paraelectric
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Consider a situation where you exert a force F on a crate of mass m, moving it at a speed v a distance d across a floor in a time interval t. The potential energy of the crate is __________
Fill in the blank(s) with correct word
The Doppler technique can be used to measure the orbital period of a planet by
A) measuring the asymmetries in the velocity curve. B) measuring the amount by which the starlight is reduced when the planet transits. C) measuring the speed at which the star orbits the mutual center-of-mass of the star and planet. D) measuring the time it takes for the star's line-of-sight velocity to cycle from peak to peak.
COBE found the cosmic microwave background to be absolutely uniform everywhere
Indicate whether the statement is true or false
What would happen if the fusion rate in the core increased but the core could not expand?
A) The Sun's core would heat and the rate of fusion would increase further. B) The Sun's core would reach a new equilibrium, but at a higher temperature. C) The Sun's core would reach a new equilibrium, but at a cooler temperature. D) The Sun's core would cool and the rate of fusion would decrease.