Find the heat that flows in 1.0 s through a lead brick 13 cm long if the temperature difference between the ends of the brick is 8.0â°c. the cross-sectional area of the brick is 13 cm^2. express your answer using two significant figures.

Explanation:

Heat transfer due to conduction is given by the formula

here we know that

A = area of crossection

L = length through which heat will flow

= temperature difference across the ends of rod

K = thermal conductivity = 35 W/m K

now from above formula we can say

carla slowed down in the beginning of her trip, stopped, and then sped up

work: w = fd (given)

work done by chet   =50*1 = 50 j

work done by mika =40*2 = 80 j

work done by sara =30*1.5 = 45 j

work done by bill =60*0.5 = 30 j

students in order from the greatest amount of work done to the least is mika> chet> sara> bill

hence option (b) is correct.