Ablock-spring system consists of a spring with constant k = 465 n/m attached to a 1.00 kg block on a frictionless surface. the block is pulled 5.70 cm from equilibrium and released from rest. for the resulting oscillation, find the amplitude, angular frequency, frequency, and period. what is the maximum value of the block's velocity and acceleration? hint (a) amplitude (in m) m (b) angular frequency (in rad/s) rad/s (c) frequency (in hz) hz (d) period (in s) s (e) maximum velocity (in m/s) m/s (f) maximum acceleration (in m/s2) m/s2

speed of light in vacuum is 300,000 km/s

speed of light in other mediums is given by the expression v = c/n, where c is the speed of light in vacuum and n is the refractive index of medium.

for the first medium v = 200,000 km/s

  so, refractive index of medium = 300000/200000 = 1.5

    1.5 refractive index is usually for glass. so first medium is glass.

for the second medium v = 250,00 km/s

so, refractive index of medium = 300000/250000 = 1.2

    1.2 refractive index is usually for water. so second medium is water.

for the third medium v = 0 km/s

so, refractive index of medium = 300000/0 = ∞

    ∞ refractive index is usually for opaque mediums. so third medium is opaque medium.

radial fractures in a piece of glass look most like which of the following?

a. spokes of a wheel

b. a circle

c. a zig zag

d. none of the above

the correct answer is a. spokes of a wheel

hope this (: