What type of geological activity is seen on Neptune's moon Triton?
a. Plate tectonics and earthquakes are a common occurrence on Triton.
b. Volcanoes of molten lava, similar to Earth, have been seen there.
c. Geysers of liquid nitrogen are seen erupting from its surface.
d. Geysers of liquid water are seen erupting from its surface.
C
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Which of the following statements about the evolution of high-mass stars is NOT correct?
A. High-mass stars can fuse elements heavier than helium in their core. B. High-mass stars evolve much faster than low-mass stars. C. The life of a high-mass star ends with a supernova explosion. D. High-mass stars do not have a helium flash. E. High-mass stars stop fusing elements once they reach a carbon-filled core.
Which ball will bounce higher off a hard surface?
A) a common rubber ball B) a steel ball C) both the same
An 8 000-kg aluminum flagpole 100-m long is heated by the sun from a temperature of 10°C to 20°C. Find the work done (in J) by the aluminum if the linear expansion coefficient is 24 × 10^?6 (°C)?1 . (The density of aluminum is 2.7 × 10^3 kg/m3 and 1 atm = 1.0 × 10^5 N/m2.)
a. 287 b. 425 c. 213 d. 710 e. 626
Sun's radiant energy is composed of shorter wavelengths than Earth's due to Sun's greater
A) size. B) surface temperature. C) both of these D) neither of these