You whirl a 2-kg body attached to a 1 meter cord around your head in a nearly horizontal circle with a speed of 4 m/s. The tension in the cord is _________
Fill in the blank(s) with correct word
32 N
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Chloroform can be broken down by chemical means but not by physical methods. Thus chloroform is
a. a homogeneous mixture. b. an element. c. a compound. d. a heterogeneous mixture.
You have to select a material as a coating on an aluminum part that improves the wear and abrasion resistance of the part. What class of material would you investigate first for suitability?
What will be an ideal response?
The graph shows 
versus t for an object moving in a straight line. What is the average velocity from t = 0 s to t = 9 s?
A. 44 
B. 32
C. 22
D. 24
Why didn't a planet form where the asteroid belt is now located?
A) Gravitational tugs from Jupiter prevented material from collecting together to form a planet. B) There was not enough material in this part of the solar nebula to form a planet. C) There was too much rocky material to form a terrestrial planet, but not enough gaseous material to form a jovian planet. D) The temperature in this portion of the solar nebula was just right to prevent rock from sticking together.