Which of the following forms an interference pattern when directed towards two suitably spaced slits?
a. light
b. electrons
c. sound
d. all of the above
e. none of the above

Zirconium has an hcp crystal structure and a density of 6.51 g/cm3. (a) what is the volume of its unit cell in m3? (b) if the c/a ratio is 1.593, compute the values of c and a.

Acoyote chasing a rabbit is moving 8.00 m/s due east at one moment and 8.80 m/s due south 4.25 s later. let the x axis point due east and the y axis point due north. find the direction of the coyote's average acceleration during that time.

Determine el momento angular de un rueda de 3000g moviendose a 10m/s con un radio de giro de 400cm