If the last peak in sunspot numbers occurred in 2013, then the next solar max is ________
Fill in the blank(s) with correct word
2024
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The isotope most useful for dating rocks from the late Pleistocene is
A) uranium-238. B) uranium-235. C) potassium-40. D) carbon-14.
A p-type semiconductor is produced by
A) doping the host crystal with donor impurities. B) pure crystals of germanium. C) doping the host crystal with acceptor impurities.
An incompressible fluid is flowing through a pipe with a constriction. The pipe is on an incline with an angle of 30.0 degrees. The narrow section is 10.0 m from the wide section and the narrow section is lower than the wide section. The velocity of the fluid in the wide section of the pipe is 4.00 m/s. The diameter of the wide section is 12.00 cm and the diameter of the narrow section is 9.00 cm. The pressure of the fluid in the wide section is 250 kPa. What is the pressure in the narrow section of the pipe? (density of the fluid is 1,000 
A. 295 kPa B. 282 kPa C. 275 kPa D. 252 kPa E. 240 kPa
A 5,000 kg satellite is orbiting the Earth in a circular path. The height of the satellite above the surface of the Earth is 800 km. The velocity of the satellite is 
A. 7,460 m/s. B. 6,830 m/s. C. 6,430 m/s. D. 5,950 m/s. E. 5,350 m/s.