Відповідь:
Пояснення:
4.5 a
Q1 = Q2
Q1 = cm1(t1-t)
Q2 = cm2(t-t2)
m = ρV
cm1(t1-t)= cρV2(t-t2)
m1=ρV2(t-t2)/(t1-t)
m1= 0.04*1000(36-6)/(96-36) = 40*30/60 = 20 кг
б) Q1 = Q2+Q3+0.1Q1
0.9Q1= Q2+Q3
Q1 = c1m1(t1-t)
Q2 = c1m2(t-t2)
Q3 = c3m3(t-t2)
0.9c1m1(t1-t) = c1ρV2(t-t2) + c3m3(t-t2)
m1 = {(c1ρV2+c3m3)*(t-t2)} / 0.9c1(t1-t)
m1 = {(4200*0.04*1000 + 450*20)*(36-6)}/{0.9*4200*(96-36)} =
= {(4200*40+9000)*30}/{0.9*4200*60} = {42*40+9}/{0.9*84} =22.34 кг
Copyright © 2024 SCHOLAR.TIPS - All rights reserved.
Answers & Comments
Відповідь:
Пояснення:
4.5 a
Q1 = Q2
Q1 = cm1(t1-t)
Q2 = cm2(t-t2)
m = ρV
cm1(t1-t)= cρV2(t-t2)
m1=ρV2(t-t2)/(t1-t)
m1= 0.04*1000(36-6)/(96-36) = 40*30/60 = 20 кг
б) Q1 = Q2+Q3+0.1Q1
0.9Q1= Q2+Q3
Q1 = c1m1(t1-t)
Q2 = c1m2(t-t2)
Q3 = c3m3(t-t2)
m = ρV
0.9c1m1(t1-t) = c1ρV2(t-t2) + c3m3(t-t2)
m1 = {(c1ρV2+c3m3)*(t-t2)} / 0.9c1(t1-t)
m1 = {(4200*0.04*1000 + 450*20)*(36-6)}/{0.9*4200*(96-36)} =
= {(4200*40+9000)*30}/{0.9*4200*60} = {42*40+9}/{0.9*84} =22.34 кг