Supernovae can trigger star formation
a. True
b. False
Indicate whether the statement is true or false
True
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Saturn's rings may have been formed when a small moon or icy planetesimal came within Saturn's _______________ and tides pulled it apart
Fill in the blank(s) with correct word
A point charge Q is placed on the x axis at x = -2.0 m. A second point charge, -Q, is placed at x = 1.0 m. If Q = 60 mC, what is the magnitude of the electrostatic force on a 40-mC charge placed at the origin?
a. 16 N b. 27 N c. 32 N d. 11 N e. 3.0 N
A particle moves in the xy plane in a circle centered on the origin. At a certain instant the velocity and acceleration of the particle are 
m/s and 
m/s2. What are the x and y coordinates of the particle at this moment?
A. x = ?4.4 m, y = 0 B. x = +5.3 m, y = 0 C. x = ?5.3 m, y = 0 D. x = +4.4 m, y = 0 E. x = ?1.8 m, y = 0
What level of body fat in women may signal amenorrhea and loss of body mass
a. 8-12% b. 20-25% c. 3-5% d. 15-20%.