____ are star-like objects that contain less than 0.08 solar masses an will never raise their core temperatures high enough that the proton-proton chain can begin. Other minor fusion reactions do occur in these objects. They fall in a gap between the low-mass M dwarf stars and the massive planets in which nuclear fusion never occurs
a. Brown dwarfs
b. Herbig-Haro objects
c. Bok globules
d. T-Tauri star
e. Main sequence stars
Ans: a. Brown dwarfs
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To be dimensionally consistent, distance [L], acceleration 
and time [T] must be related as follows.
A. 
B. 
C. 
D. 
Diagnose and Investigate
What will be an ideal response?
Answer the following statement(s) true (T) or false (F)
1. At time t = 0 a person is sliding due east on a flat, frictionless plane of ice. The net force on this person is due to a battery-powered fan the person holds that exerts a southward thrust force on the person. Assuming that drag is negligible, the eastward component of the person’s velocity is unaffected by this force.
How much work is done by a person lifting a 2.0-kg object from the bottom of a well at a constant speed of 2.0 m/s for 5.0 s?
A. 0.22 kJ B. 0.20 kJ C. 0.24 kJ D. 0.27 kJ E. 0.31 kJ