The apparent positions of stars around the sun during an eclipse have been used to prove the general theory of relativity
a. True
b. False
Indicate whether the statement is true or false
True
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Enrico says that positive charge is created when you rub a glass rod with silk, and that negative charge is simply the absence of positive charge. Rosetta says that negative charge is created and that positive charge is the absence of positive charge. (She has heard that Ben Franklin should have reversed the signs he associated with the charges.) Which one, if either, is correct?
A. Enrico, because there really is only one kind of charge. B. Rosetta, because there really is only one kind of charge. C. Neither: although no charge is present originally, both types of charge are created through friction. D. Both: only one type of charge is created by friction at any one time. E. Neither: both negative and positive charge are present simultaneously in all solid materials on Earth and the process described involves a transfer of charge, not the creation of charge.
A car travels along the perimeter of a vertical circle (radius = 0.25 km) at a constant speed of 30 m/s. What is the magnitude of the resultant force on the 60-kg driver of the car at the lowest point on this circular path?
a. 0.37 kN b. 0.80 kN c. 0.22 kN d. 0.59 kN e. 0.45 kN
One plate pulls away from another and new ocean rock is formed at the type of plate boundary called ______________
Fill in the blank(s) with correct word
A series RLC circuit has a 100-? resistor, 2.00-mH inductor and a 4.00-?F capacitor connected across a 120-V rms ac source at (1000/?) Hz. What is the power dissipated by the circuit?
A) 184 W B) 18.6 W C) 58.4 W D) 91.8 W E) 180 W