A charge of 80 nC is uniformly distributed along the x axis from x = 0 to x = 2.0 m. Determine the magnitude of the electric field at a point on the x axis with x = 8.0 m.
A. 30 N/C
B. 15 N/C
C. 48 N/C
D. 90 N/C
E. 60 N/C
Answer: B
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Energy Conservation With Nonconservative Forces: A sled is moving along a horizontal surface with a speed of 5.7 m/s. It then slides up a rough hill having a slope of 11° above the horizontal. The coefficient of kinetic friction between the sled and the surface of the hill is 0.26. How far along the surface does the block travel up the incline?
Fill in the blank(s) with the appropriate word(s).
A cantilever beam with rectangular cross section (b 5 95 mm, h 5 300 mm) supports load P 5 160 kN at its free end. The ratio of the magnitudes of the principal stresses (?1/?2) at point A (at distance c 5 0.8 m from the free end and distance d 5 200 mm up from the bottom) is approximately:
(A) 5
(B) 12
(C) 18
(D) 25
How do the escape velocities for two rockets, the first weighing 20 N and the second weighing 20,000 N compare?
A) The escape velocity for the lighter rocket is smaller than that for the heavier rocket. B) The escape velocity for the lighter rocket is the same as that for the heavier rocket. C) The escape velocity for the lighter rocket is greater than that for the heavier rocket. D) It is impossible to compare the two escape velocities.
O and B stars are examples of ________________ that are used to outline the arms in a galaxy like the Milky Way galaxy
Fill in the blank(s) with correct word