A rock is thrown directly upward from the edge of the roof of a building that is 66.2 meters tall. The rock misses the building on its way down, and is observed to strike the ground 4.00 seconds after being thrown
Neglect any effects of air resistance. With what speed was the rock thrown?
3.05 m/s
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About how long does it take our solar system to complete one orbit around the center of the Milky Way Galaxy?
A) 10,000 years B) 1 million years C) 230 million years D) 4-1/2 billion years E) 14 billion years
A +15-nC point charge is placed on the x axis at x = 1.5 m, and a ?20-nC charge is placed on the y axis at y = ?2.0m. What is the magnitude of the electric field at the origin?
a. 105 N/C b. 15 N/C c. 75 N/C d. 45 N/C e. 60 N/C
Assume everyone in the United States consumes one soft drink in an aluminum can every two days. If there are 270 million Americans, about how many tons of aluminum need to be recycled each year if each can weighs 1/15 pound and one ton = 2 000 pounds?
a. 450 000 tons b. 1.6 million tons c. 3.3 million tons d. 0.82 million tons e. 410 000 tons
A 24-nC charge is distributed uniformly along the x axis from x = 2 m to x = 6 m. Which of the following integrals is correct for the magnitude (in N/C) of the electric field at x = +8 m on the x axis?
A.
B.
C.
D.
E.