A Lagrange point in the Earth—Moon system is a position
A) directly between the Earth and Moon
B) on the surface of the Moon that points directly away from the Earth
C) on the Earth's surface that the Moon's gravity is concentrated
D) in space where the effects of the Earth's and Moon's gravity cancel each other out
D
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Charge of uniform density (20 nC/m2) is distributed over a cylindrical surface (radius = 1.0 cm), and a second coaxial surface (radius = 3.0 cm) carries a uniform charge density of ?12 nC/m2 . Determine the magnitude of the electric field at a point 2.0 cm from the symmetry axis of the two surfaces
a. 2.3 kN/C b. 1.1 kN/C c. 1.7 kN/C d. 3.4 kN/C e. 4.5 kN/C
What do "kiloton" and "megaton" refer to?
a. explosive yields of nuclear weapons b. kiloton means 1000 tons of TNT c. megaton means one million tons of TNT d. all of the above
When water boils, its temperature __________
Fill in the blank(s) with correct word
A negatively charged particle is moving in the +x-direction when it enters a region with a uniform electric field pointing in the +x-direction. Which graph gives its position as a function of time correctly? (Its initial position is x = 0 at t = 0.)
a.
b.
c.
