1. a sphere (radius r, total charge q uniformly distributed throughout the volume) is spinning at angular velocity w about its center, which is at the origin. what is the volume current density j (r,0, d) at any point (r, θ, φ) in the sphere? (don't forget direction too! )2. a very thin plastic ring (radius r) has a constant linear charge density, and total charge q. the ring spins at angular velocity w about its center, which is the origin. what is the current i, in terms of given quantities? what is the volume current density j in cylindrical coordinates? (this may be a little tricky, since the ring is very thin there will be some functions. hint: write down a formula for r, θ first. and, remember that j should be a vector! )

this is an example of "committed" time.

committed time, as contracted time, takes need over essential and available time since it is seen as profitable work. it alludes to the time allotted to keep up a home and family. at the point when a man is commuting using committed time this individual may feel that the drive is an obligation to family, for example, strolling youngsters to class or driving a mate to work. contracted and committed time clients may feel that their commute could really compare to the commute of important or leisure time clients on the grounds that their commute is profitable work. in this manner, they might be more disposed to pick a mechanized method of movement.  

a cold ice-tea.

pour in room temperature or cold water. cover the pitcher and refrigerate. steep white or green tea for 6 to 8 hours; steep black or oolong tea for 8 to 12 hours.jun 28, 2015

3. dark matter

empty space could also be a simple vacuum