Read the passage from when birds get flu and cows go mad! by john diconsiglio. Perhaps the best news about mad cow is that people do not catch it easily. Chances are, millions of people have eaten infected beef. But, for reasons scientists still do not understand, only about 150 people have gotten vcjd and died from it. The tone of the passage is anxious. Excited. Reassuring. Unhappy.

Ateacher attaches a ball to a meter long string and whirls it around in a horizontal circle at constant speed. the teacher explains that the string is what makes the ball go in a circle. why is the string necessary? a) the string is needed to apply a torque to the ball. b) the string is needed to push on the ball to get it up to speed. c) circle motion requires an inertia which is provided by the string. d) circle motion requires a force to give it a centripetal acceleratio