Suppose you have a spool of thread that can rotate around a fixed axis as you pull thread off it. If you pull the thread with your hand so that the thread always lies along a certain fixed line, how will your hand’s speed as it moves compare to 
, where R is the spool’s radius and 
is angular speed?
A. The hand’s speed will be greater than 
.
B. The hand’s speed will be less than .
C. The hand’s speed will be equal to .
D. The hand’s speed has nothing to do with .
C. The hand’s speed will be equal to .
You might also like to view...
What does the universe look like on very large scales?
A) Galaxies are uniformly distributed. B) Galaxies are randomly distributed. C) Galaxies are distributed in a hierarchy of clusters, superclusters, and hyperclusters. D) Galaxies appear to be distributed in chains and sheets that surround great voids. E) Galaxies are distributed in a great shell expanding outward from the center of the universe.
Neptune has a radius of 2.48 × 107 m and an escape velocity of 23,300 m/s. What is the mass of Neptune? G = 6.67 x 10-11 N•m2/kg2
A) 1.01 × 1026 kg B) 2.02 × 1026 kg C) 3.03 × 1026 kg D) 4.04 × 1026 kg E) 5.05 × 1026 kg
Which of these colors of light has photons of greatest energy?
a. Red b. Orange c. Green d. Yellow
An ac circuit has a 100-? resistor in series with a 4.9-?F capacitor and a 700-mH inductor. At what frequency does the circuit act like a pure resistance?
A) 0.29 MHz B) 1.9 MHz C) 12 MHz D) 0.54 kHz E) 86 Hz