A +7.00 ?C point charge and -9.00 ?C point charge are placed along the x-axis at x = 0.000 cm and x = 40.0 cm, respectively
Where must a third charge, q, be placed along the x-axis so that it does not experience any net electric force due to the other two charges?
A) -0.200 m
B) 2.99 m
C) -0.187 m
D) -2.99 m
E) 0.187 m
D
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Regions of Earth where the Sun is more directly overhead will experience ________.
A. colder weather B. warmer weather C. more eclipses D. longer nights E. None of these choices is correct.
Some species of whales can dive to depths of one kilometer. What is the total pressure they experience at this depth? (rsea = 1 020 kg/m3 and 1.01 × 10^5 N/m2 = 1 ATM.)
a. 9.00 ATM b. 90.0 ATM c. 100 ATM d. 111 ATM e. 130 ATM
Which of the following statements best reflects our current knowledge about the term flife in the equation
Number of Civilizations = NHP × flife × fcivilization × fnow? A) The value of flife is either 0 or 1, but not anything in between. B) The value of flife is between 0 and 1. C) The value of flife is less than 0.0000001. D) The value of flife is equal to 1/2. E) The value of flife is greater than 0.9.
A 10-g bullet moving horizontally with a speed of 1.8 km/s strikes and passes through a 5.0-kg block initially at rest on a horizontal frictionless surface. The bullet emerges from the block with a speed of 1.0 km/s. What is the kinetic energy of the block immediately after the bullet emerges?
a. 8.0 J b. 6.4 J c. 5.3 J d. 9.4 J e. 10 J