80. Two metal rods, 1 & 2 of same length have same 8 temperature difference between their ends, their
thermal conductivities are K, & K, and cross
sectional areas A, & A, respectively. What is
required condition for same rate of heat conduction
in them.
(1) K1= K2
(2) K1 A, - K2 A,
(3) K1/A1=K2/A2
(4)K1/l1^2=K2/l2^2
​

The radius of the circle is 4 cm and the measure of the central angle is 90° the area of the sector with a central angle measuring 90° and radius of length 4 cm is vt cm the triangle in the sector is 4 cm the area of the triangle is v/cm² the area of the segment of the circle is (471 - ) cm?

Bob is putting books on a shelf and takes a break after filling 18 1/2 inches on the book shelf. the book shelf is now 2/3 full. how long is the entire bookshelf?

Suppose you just purchased a digital music player and have put 8 tracks on it. after listening to them you decide that you like 4 of the songs. with the random feature on your player, each of the 8 songs is played once in random order. find the probability that among the first two songs played (a) you like both of them. would this be unusual? (b) you like neither of them. (c) you like exactly one of them. (d) redo () if a song can be replayed before all 8 songs are played.