In a stringed musical instrument, the part that vibrates in resonance with the sound waves produced by the strings is called the
a. reed.
b. membrane.
c. sounding board.
d. diatonic scale.

The law of the conservation of momentum says that the total momentum of any closed and isolated system cannot

The two stars in a certain binary star system move in circular orbits. the first star, alpha, has an orbital speed of 36 km/s. the second star, beta, has an orbital speed of 12 km/s. the orbital period is 137 d. a) what is the mass of the star alpha? b) what is the mass of the star beta?

Use the profile illustrated for problem (1). assume that the layer of silty sand fill (sm) is placed over the entire site. estimate the thickness of the fill (h - in feet) that will cause the effective vertical stress at the center of the clay layer to increase by 517.5 pounds per square foot.