Concerning the force holding an atom together [that is, holding the electrons into the nucleus] and the force holding the solar system together: Are these basically the same type of force?
A) Yes, both are electromagnetic forces.
B) Yes, both are gravitational forces.
C) No, nuclear forces hold an atom together while electromagnetic forces hold the solar system together.
D) No, electromagnetic forces hold atoms together while gravitational forces hold the solar system together.
E) No, nuclear forces hold an atom together while gravitational forces hold the solar system together.
D
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The nuclear bulge of our galaxy
a. contains stars that are primarily population I stars. b. is primarily composed of gas and dust. c. contains stars primarily associated with the spherical component of our galaxy. d. contains stars primarily associated with the disk component of our galaxy. e. a, b and d
Iron nuclei are the most tightly bound nuclei, which is why their production leads to type II supernovae
Indicate whether the statement is true or false
A proton with a kinetic energy of 0.20 keV follows a circular path in a region where the magnetic field is uniform and has a magnitude of 60 mT. What is the radius of this path?
a. 4.1 cm b. 2.9 cm c. 3.4 cm d. 5.1 cm e. 2.4 cm
When the surface of the reactive metal titanium is passivated, _________ forms on the surface of the metal.
Fill in the blank(s) with the appropriate word(s).