Einstein proposed two basic principles or laws as the foundation of his special theory of relativity. One of these principles is intuitively plausible, while the other seems quite implausible or odd to our intuitions
The principle that is intuitively plausible is
A) the principle of time dilation.
B) the principle of inertia.
C) the principle of relativity.
D) the principle of the constancy of lightspeed.
E) E=mc2.
C
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Helioseismology is the study of the differential rotation and magnetic field of the sun
Indicate whether the statement is true or false
Resistance and Resistivity: The resistivity of a 1.0 m long copper wire is 1.72 × 10-8 ? ? m and its cross sectional area is 2.0 × 10-6 m2. If the wire carries a current of 0.20 A, what is the voltage across the wire?
A. 17 mV B. 0.90 mV C. 1.7 mV D. 10 mV E. 90 mV
A 150 N picture hangs from a nail in the wall. The maximum shear stress the nail can sustain is 2.00 
The smallest diameter the nail can be is
A. 9.77 mm. B. 8.22 mm. C. 7.97 mm. D. 7.52 mm. E. 6.03 mm.
The focal length of the objective of a telescope is much longer than the focal length of the eyepiece
Indicate whether the statement is true or false