A glass block, for which n = 1.52, has a blemish located 3.3 cm from one surface. At what distance from that surface does the image of the blemish appear to the outside observer?
a. 5.0 cm
b. 2.2 cm
c. 4.1 cm
d. 2.7 cm
e. 3.3 cm
b
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A planet orbiting another star is called a protoplanet
Indicate whether the statement is true or false
An aluminum beam (E 5 72 GPa) with a square cross section and span length L 5 2.5 m is subjected to uniform load q 5 1.5 kN/m. The allowable bending stress is 60 MPa. The maximum deflection of the beam is approximately:
(A) 10 mm
(B) 16 mm
(C) 22 mm
(D) 26 mm
The best evidence for quarks comes from
A. the decay of electrons into quarks and mesons. B. scattering experiments performed at very high energies. C. theories that would not make sense if quarks did not exist. D. particles seen outside the nucleus with charge 1/3 the charge of a proton.
If R1 < R2 < R3, and if these resistors are connected in parallel in a circuit, which one has the highest current?
a. R1 b. R2 c. R3 d. All have the same current.