If a piece of wood is suspected to be several thousand years old, its true age can likely be determined through use of the isotope _________
Fill in the blank(s) with correct word
carbon-14
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An athlete participates in an interplanetary discus throw competition during an Olympiad that takes place on a planet where the free-fall acceleration is 9.7 m/s2
He throws the discus with an initial velocity of 20 m/s at an angle of 60° from the vertical. Neglecting air resistance and the height of the discus at the point of release, what is the range of the discus? A) 21 m B) 60 m C) 36 m D) 40 m E) 32 m
A current may be induced in a coil by
a. moving one end of a bar magnet through the coil. b. moving the coil toward one end of the bar magnet. c. holding the coil near a second coil while the electric current in the second coil is increasing. d. all of the above. e. none of the above.
The most striking valley in the solar system is:
A) the Grand Canyon in Arizona. B) Gwenivere on Venus. C) the Discovery Scarp of Mercury. D) Valles Marineris on Mars. E) Valhalla on Callisto.
A parallel-plate capacitor is disconnected from a battery, and the plates are pulled a small distance further apart. Does E between the plates increase, decrease, or stay the same?
1.increase 2.decrease 3.remains the same