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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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
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?