The laws of refraction and reflection are the same for sound as for light. The speed of sound in air is 340 m/s and in water it is 1510 m/s. If a sound wave approaches a plane water surface at an angle of incidence of 12.0°, what is the angle of refraction?
67.4°
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What is exchanged between different particles in order to make the forces work?
A. quarks B. leptons C. bosons D. baryons E. electrons
Explain why a heating system made by circulating hot water through a concrete floor could be desirable. Would it be better to circulate the hot water through the ceiling? Why or why not?
What will be an ideal response?
A prism decomposes incident white light into its ________ colors because of refraction.
What will be an ideal response?
A simply supported steel beam of length L 5 1.5 m and rectangular cross section (h 5 75 mm, b 5 20 mm) carries a uniform load of q 5 48 kN/m that includes its own weight. The maximum transverse shear stress on the cross section at 0.25 m from the left support is approximately:
(A) 20 MPa
(B) 24 MPa
(C) 30 MPa
(D) 36 MPa
