Einstein's principle of the constancy of lightspeed and principle of relativity are
A) assumptions which cannot be proven.
B) the basic principles of his theory of relativity.
C) Both of the above.
D) Neither of the above.
E) now known to be false at the microscopic level.
C
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A slender uniform rod 100.00 cm long is used as a meter stick. Two parallel axes that are perpendicular to the rod are considered
The first axis passes through the 50-cm mark and the second axis passes through the 30-cm mark. What is the ratio of the moment of inertia through the second axis to the moment of inertia through the first axis? A) I2/I1 = 1.5 B) I2/I1 = 1.7 C) I2/I1 = 1.9 D) I2/I1 = 2.1 E) I2/I1 = 2.3
An electron determined to be at y = 2.000 ± 0.0010 cm has what minimum uncertainty in velocity?
What will be an ideal response?
The electric field just outside the surface of a hollow conducting sphere of radius 20 cm has a magnitude of 500 N/C and is directed outward. An unknown charge Q is introduced into the center of the sphere and it is noted that the electric field is still directed outward but has decreased to 100 N/C. What is the magnitude of the charge Q?
a. 1.5 nC b. 1.8 nC c. 1.3 nC d. 1.1 nC e. 2.7 nC
What is the frequency, in hertz, of a sound wave (v = 340 m/s) with a wavelength of 68 m?
a. 5 Hz b. 23120 Hz c. 340 Hz d. 0.2 Hz