Naturally occurring uranium is mostly
A) 14U. B) 238U. C) 233U. D) 235U. E) good to eat.
B
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Albert uses as his unit of length (for walking to visit his neighbors or plowing his fields) the albert (A), the distance Albert can throw a small rock
One albert is 92 meters How many square alberts is equal to one acre? (1 acre = 43,560 ft2 = 4050 m2)
A 1000-kg car is slowly picking up speed as it goes around a horizontal unbanked curve whose radius is 100 m. The coefficient of static friction between the tires and the road is 0.35. At what speed will the car begin to skid sideways?
A) 9.3 m/s B) 24 m/s C) 34 m/s D) 35 m/s E) 19 m/s
Red dwarf stars (stars between 0.08 and 0.5 solar masses) evolve very differently than other stars as they age because ____
a. they are formed from pure hydrogen b. they never reach the minimum temperature required to fuse carbon c. they never form white dwarf as remnants d. they are always part of a close binary system e. their interiors are well mixed, through strong convection
Measuring the changing light output of a star to search for exoplanets is called ________.
A. spectroscopy B. the Doppler method C. the transit method D. gravitational lensing