A - 3
B - 1
C - 2
D - 4
E - 5
Answer:
100m
Explanation:
100m
s=ut+1/2at^2
s= unknown, u=0, a=2, t=10
s=0*10+1/2(2)(10)^2
s=1/2(2)(100)
s=1(100)
displacement = 100 meters
Answer:
874.2 KJ
Explanation:
Ethyl alcohol boiling point = 78oC, freezing point = -114oC heat of vaporization = 879 kJ/kg heat of fusion = 109kJ/Kg specific heat capacity (c) of ethyl alcohol = 2,43KJ/Kg.k
calculating each heat drawn singly
Quantity loss due vaporization = m × Lv where m is mass in kg and Lv is the heat of vaporization
Quantity of heat loss due to fusion = m × Lf ( heat of fusion)
Quantity of heat loss due to cooling from 78oc to -114 = m × c × ΔT 9 (change in Temperature)
Quantity of heat removed due to vaporization = 0.601 ×879 = 528.279 KJ
Quantity of heat lost due to cooling from 78oc to -114oc = mcΔT= 0.601 × 2.43 × ( 78 - (-114)) = 0.601 ×2.43 × 192 = 280.4 kJ
Quantity of heat lost due to fusion during freezing = 0.601 × 109 = 65.509 KJ
Total heat removed = sum of the each quantity of heat removed from the gaseous ethyl alcohol = 528.279 + 280.4 + 65.509 = 874.2 KJ
