Radioactivity Basics: In the radioactive decay equation 
? 
Th + X, what is X?
What will be an ideal response?
He (? particle)
Physics & Space Science
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______________ acceleration is necessary for uniform circular motion
Fill in the blank(s) with correct word
Physics & Space Science
LR Circuits: A series circuit consists of an open switch, an ideal emf source ?0, a 5.0-k? resistor, and a 4.0-H inductor. If the potential across the resistor is 65.0 V at 2.0 ms after the switch is closed, find the source emf, ?0.
A. 71 V B. 36 V C. 76 V D. 56 V
Physics & Space Science
What is the name of the outer rigid layer of a planet?
a. crust b. mantle c. lithosphere
Physics & Space Science
The area under the curve, on a Force-position (F-x) graph, represents
A) work. B) efficiency. C) kinetic energy. D) power. E) friction.
Physics & Space Science