An electron is known to be confined to a region of width 0.10 nm. What is an approximate expression for the least kinetic energy it could have, expressed in eV?
What will be an ideal response?
3.8 eV
Physics & Space Science
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Two pistons push down on the fluid filling two cylinders connected by a narrow hose, as shown in the figure. The area A1 is 1 square inch, and the area A2 is 10 square inches. A force of 4 pounds is exerted downward on piston 1, as shown
 The force F2 in pounds needed to keep piston 2 in place is a. 0.25. b. 0.4. c. 4. d. 10. e. 40.
Physics & Space Science
The dominant trigger of star formation in our Galaxy is supernova explosions
Indicate whether the statement is true or false
Physics & Space Science
"MeV/c2" is a unit for:
a. energy. c. mass. b. nuclear force. d. momentum.
Physics & Space Science
Centrifugal forces are an apparent reality to observers in a reference frame that is
A) moving at constant velocity. B) an inertial reference frame. C) at rest. D) rotating. E) none of the above
Physics & Space Science