Toward which point of the compass does Toledo move as a result of the Earth's rotation?
What will be an ideal response?
East
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Slanting Surfaces Without Friction: A slanted roof rises at 35° above the horizontal, and the straight-line distance from the top of the roof to the bottom edge is 4.5 m. The roof is covered with ice, so it offers no friction to objects sliding on it. A piece of ice at the top suddenly breaks loose and begins to slide down from rest.(a) How long will it take for the ice to reach the bottom edge of the roof?(b) How fast will the ice be traveling just as it reaches the bottom edge?
What will be an ideal response?
The identities of dark energy and dark matter are
A) unknown at this time. B) subjects of intense astronomical interest. C) both of these D) neither of these
Magnetic Field of a Current Loop: A circular metal loop of radius 10 cm and three long straight wires carry currents of I1 = 60 A, I2 = 20 A, I3 = 70 A, and I4 = 30 A, as shown in the figure. Each of the straight wires is 20 cm from the center of the loop. The axes are shown in the figure, with the +z-axis coming out of the paper. What is the z component of the resultant magnetic field at the center of the loop? (?0 = 4? × 10-7 T ? m/A)
A. -360 ?T B. +360 ?T C. -40 ?T D. +40 ?T E. -170 ?T
Which type of reaction is 4Al + 3O2? 2Al2O3?
a. Decomposition b. Combination c. Double-replacement d. Single-replacement