Answer:
B
Explanation:
the exact and absolute age of a rock layer
Answer:
B) 4500 Pa
Explanation:
As pressure is force per unit area,
P = F/A
It stands to reason that the smallest pressure for a given force is when it is shared by the largest area.
The possible areas are
0.30(0.40) = 0.12 m²
0.30(0.50) = 0.15 m²
0.40(0.50) = 0.20 m²
The pressure when the face with the largest area (0.20 m²) is down is
P = 900 / 0.20 = 4500 N/m² or 4500 Pa
the other possible pressures would be
900/0.15 = 6000 Pa
900/0.12 = 7500 Pa
which are both larger than our solution.
Answer:B
Explanation: I think this is the answer
Answers:
a) 
b) 
c) 
Explanation:
A unit vector is a vector whose magnitude (length) is equal to 1. This kind of vector is identified as 
and the way to calculate is as follows:
Where:
is the vector
is the magnitude of the vector
Having this information clarified, let's begin with the answers:
a) Force Vector
Magnitude of 
:
<u />
<u>Unit vector:</u>
b) Displacement Vector
Magnitude of 
:
<u />
<u>Unit vector:</u>
c) Velocity Vector
Magnitude of 
:
<u />
<u>Unit vector:</u>
This would be a cold front that forms when a warm air mass meets the area of a cooler air mass, although it should be noted that this doesn't always feel "cold".
