There is a greater proportion of carbon-14 in
A) new bones.
B) old bones.
C) same in each
Answer: A
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The Earth's circumference was first determined by:
A) Aristotle using lunar eclipses. B) Pythagoras with geometry. C) Hipparchus with stellar parallaxes. D) Erastothenes with solstice shadows. E) Aristarchus with first and third quarter Moon timings.
Mercury has "weird terrain" directly opposite its huge Caloris Impact Basin
Indicate whether the statement is true or false
Assume when using a meter stick measuring can be done so that the last significant figure is in the tenth of a millimeter digit. If you are measuring an object with length between 8 and 9 cm, how many significant figures will result if you only use the part of the meter stick between the 82-cm and 93-cm positions?
a. 0 b. 2 c. 3 d. 4 e. more than 4
An ac series circuit consists of a voltage source of frequency 60 Hz and voltage amplitude V, a 533-? resistor, and a capacitor of capacitance 6.4-?F
What must be the source voltage amplitude V for the average electrical power consumed in the resistor to be 989 W? There is no inductance in the circuit.