11.) Perhaps the most influential of the “Robber Barons,” he made his fortune in the world of finance and came to eventually acquire many of his fellow titans’ industrial empires?

23.) This President who took office as the result of an assassin’s bullet, came to be more closely associated with the ideals of the Progressive Era than perhaps any of his fellow inhabitants of the white house during the early 20th century?

7.) What rapidly expanding Midwestern city served as the most important railroad hub, connecting the Eastern seaboard and the West during the late 19th century?

What is the main difference between paid and unpaid search traffic?

Suppose you walk 30 meters east, 10 meters north, then 6 meters west.  How far are you from your initial position?

An object’s velocity as a function of time is v(t) = 12 – 4t.  At what time does the object change direction?

A ball is thrown into the air with some initial velocity.  It rises to a maximum height, turns around and falls to the Earth.  Which statement describes the acceleration vector during this motion?  Assume a coordinate system where up is positive.

A 400 kg roller coaster travels at 10 m/s over the top of a track (point B).  If the track at point B is part of a circle with radius r2 = 20 m, what is the normal force acting on the cart?

A block starts with some initial velocity and travels up a ramp as shown. Which of the following diagrams correctly shows the forces on the block? image00455ff9ad255ff9ad2.gif

A block slides on a horizontal table.  If the coefficient of kinetic friction between the table and the block is 0.3, what is the acceleration?  You should find that mass cancels out when you apply Newton’s 2nd law.