If a person hears two sounds, the first is emitted by human being while the second is emitted by an instrument. Both have same frequency and same amplitude.
Select one:
a. The person can distinguish between the two sounds.
b. The person cannot distinguish between the two sounds
c. The person can hear only the sound emitted from the human being
d. The person can hear only the sound emitted from the instrument

Ablock of mass m = 2.5 kg is attached to a spring with spring constant k = 740 n/m. it is initially at rest on an inclined plane that is at an angle of theta= 26 with respect to the horizontal, and the coefficient of kinetic friction between the block and the plane is uk = 0.17. in the initial position, where the spring is compressed by a distance of d = 0.16 m, the mass is at its lowest position and the spring is compressed the maximum amount. take the initial gravitational energy of the block as zero. the block's initial mechanical energy is 9.472 j.b. if the spring pushes the block up the incline, what distance l in meters will the block travel before coming to rest? the spring remains attached to both the block and the fixed wall throughout its motion.