1. Rocks near mid-ocean ridge were younger than rock near trenches
2.Matching bands of magnetic rocks were found on either side the mid-ocean ridge; bands like tree rings - record changes in earth's magnetic field over time
3. Earthquake data showed oceanic crust is sinking on to the mantle at trenches
Answer: 180torr
Explanation:
Using P1VI/T1= P2V2/T2
where
p1= 650 torr
p2=??
T1= 27°C = 27°C + 273= 300K
T2= -183°C= -183°C +273=90K
V1= V2 ie volume is constant
SOLUTION
1 torr= 1mmHg
P1VI/T1= P2V2/T2, where V1=V2
= P1/TI= P2/T2
600/300=P2/90
P2= 600X90/300= 180 torr