The two main theories of 20th century physics are
A) relativity and quantum theory.
B) relativity and Newtonian mechanics.
C) quantum theory and electromagnetism.
D) relativity and electromagnetism.
E) electromagnetism and thermodynamics.
A
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At point P the magnetic field due to a long straight wire carrying a current of 2.0 A is 1.2 µT. How far is P from the wire? (?0 = 4? × 10-7 T ? m/A)
A) 33 cm B) 22 cm C) 11 cm D) 55 cm E) 44 cm
Which moon of Saturn has the surface with the widest range of ages? Why?
What will be an ideal response?
Kinetic energy
A. Depends only on the mass of the object B. Depends on the speed and the mass of the object C. Depends on only the speed of the object D. Is not in this chapter
Density: Substance A has a density of 3 g/cm3 and substance B has a density of 4 g/cm3. In order to obtain equal masses of these two substances, what must be the ratio of the volume of A to the volume of B?
A. 
= 
B. 
= 
C. 
= 
D. 
= 
E. 
= 