2) CDs and DVDs turn with a variable w that keeps the tangential speed v. constant. Find the angular speed w that a CD must have in order to give it a linear speed v. = 1.25 m/s when the laser beam shines
on the disk
(a) at 2.50 cm from its center, and
(b) at 6.00 cm from its center.

Let v1, v2, w be three linearly independent vectors in r 3 . that is, they do not all lie on the same plane. for each of the following (infinite) set of vectors, carefully sketch it in r 3 , and determine whether or not it is a vector space (i.e., a subspace of r 3 ). explain your reasoning

Which statement correctly describes the relationship between frequency and wavelength?

Identify the correct relation showing that the radius r of the orbit of a moon of a given planet can be determined from the radius r of the planet, the acceleration of gravity at the surface of the planet, and the time τ required by the moon to complete one full revolution about the planet. determine the acceleration of gravity at the surface of the planet jupiter knowing that r = 71 492 km and that t= 3.551 days and r= 670.9 × 10^3 km for its moon europa.