A certain material is in a room at 27°C. If the absolute temperature (K) of the material is tripled, its resistance quadruples. (Water freezes at 273 K.) What is the value for a, the temperature coefficient of resistivity?
a. 0.0050 (°C)-1
c. 1 (°C)-1
b. 0.0025 (°C)-1
d. 3 (°C)-1
A
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How long does it take for a star like our Sun to form?
A) 100 thousand years B) Two million years C) Fifty million years D) One billion years E) 4.6 billion years
A small hole is cut in the bottom of a water storage tank. The initial depth of the water is 8.00 m. If the diameter of the small hole in the bottom of the tank is 1.00 cm, then what is the flow rate of the water leaving the tank?
a. 
b. 
c. 
d. 
e. 
The reason that most extrasolar planets discovered by the Doppler technique are found close to their parent stars is
A) the closer to a star, the hotter and therefore brighter the planet is. B) more of the starlight is blocked by the planet when it transits the star. C) planets that are close to a star are heated up and therefore larger. D) they transit more frequently, and have thus been more likely to be detected in the short time we have been searching for them. E) the wavelength shift of the star's spectrum is larger.
All Type II supernovae produce neutron stars when they collapse
Indicate whether the statement is true or false