The law of superposition states that in an undeformed sequence of sedimentary rocks the oldest rocks will be at the bottom while
the
youngest will be on top. Notice the word undeformed in the last sentence: that means the naturally occurring rock layers are
somehow altered, causing confusion or gaps in the geologic record. Changes to the rock strata can occur due to a variety of geologic
events. Which geologic event is INCORRECTLY identified?
es )
A)
A. Faulting due to stress and fracture.
B)
B. Folding of layers due to compression.
D. Intrusion of magma at Earth's surface
D)
C. Unconformity showing erosion and deposition
History of the Earth
No
youngest will be on top. Notice the word undeformed in the last sentence: that means the naturally occurring rock layers are
somehow altered, causing confusion or gaps in the geologic record. Changes to the rock strata can occur due to a variety of geologic
events. Which geologic event is INCORRECTLY identified?
es )
A)
A. Faulting due to stress and fracture.
B)
B. Folding of layers due to compression.
D. Intrusion of magma at Earth's surface
D)
C. Unconformity showing erosion and deposition
History of the Earth
No
2 answers:
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Answer:
6.86 meters
Explanation:
Let the compression of the string be represented by x, and the height of projection of the toy rocket be represented by h.
So that;
x = 9 cm = 0.09 m
In its rest position (i.e before the launch), the spring has a stored potential energy which is given as;
PE = K
= x 830 x
= 415 x 0.0081
= 3.3615
The potential energy in the string = 3.36 Joules
Also,
PE = mgh
where: m is the mass, g is the gravitational force and h the height.
m = 50 g = 0.05 kg, g = 9.8 m
Thus,
PE = 0.05 x 9.8 x h
3.3615 = 0.05 x 9.8 x h
3.3615 = 0.49h
⇒ h =
= 6.8602
The height of the toy rocket would be 6.86 meters.
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