A heavy rock and a light rock are dropped from the same height and experience no significant air resistanc as they fall. Which of the following statements about these rocks are correct?
A heavy rock and a light rock are dropped from the same height and experience no significant air resistanc as they fall. Which of the following statements about these rocks are correct?
your best answer would be b
B) Its horizontal velocity component is the same as it was just as it was launched
Explanation:
From dynamic we know that free falling objects had two components of velocity
The only acceleration that takes place in this case is gravity in the y-component of velocity
[tex]v_{vx}=v_{ox}+at\\v_{y}=v_{oy}+gt[/tex]
Since a=0 and [tex]g=-9.8m/s^2=-32.2ft/s^2[/tex] that means that the velocity at the y-component changes with time but the horizontal component remain the same
[tex]v_{x}=v_{ox}[/tex]
This means that the horizontal velocity is not 0 but is the same as it was just as it was launched
(A)It is a process by which all rocks are formed
or
(D) it had occurred over geologic time
(I think it's A)
A hand specimen is a small piece of the outcrop that can be examined closely.
Explanation:
True statement:
A hand specimen is a small piece of the outcrop that can be examined closely.
A rock's texture cannot be characterized from a hand specimen is false statement as rock texture can be characterized from a hand specimen.
Clay-sized and smaller grains can not be identified in the field with a hand lens as these grains are too small to be identified by hand grains.
your most reliable answer would be b
Option (B)
Explanation:
The metamorphic rocks are formed directly from the previously existing rocks of all the three kinds such as sedimentary, igneous and other metamorphic rocks. This type of rock is primarily found in the convergent plate boundaries where the rocks are subjected to extreme pressure and temperature condition, resulting in the increasing grade of metamorphism, which is known as the prograde metamorphism. The rocks alters and give rise to the formation of metamorphic rocks, such as slate, phyllite, schist and gneiss.
Thus, the correct answer is option (B).
b. Its horizontal velocity component is the same as it was just as it was launched
Explanation:
When the rock is thrown from the upper edge of the cliff, at some angle with the horizontal. There is no any acceleration in horizontal direction, therefore, the horizontal velocity remains the same, whereas there is a constant downward acceleration of the magnitude g= 9.81 m/s^2. This causes the increase in vertical velocity of the rock in downward direction.
therefore true statement just before it hits the ground
b. Its horizontal velocity component is the same as it was just as it was launched.
OB) Sedimentary rock can turn into metamorphic rock
Explanation:
Both will hit the ground at the same time
Explanation:
This was proven as no matter what gravity will force them to hit the ground at the same time in air
C) Slate, phyllite, schist, and gneiss are found in areas of continental collision
Explanation:
The only true statement among these options is option C: Slate, phyllite, schist and gneiss are all metamorphic rocks. This means that, when exposed to incredibly high levels of pressure and temperature, they will change radically (basically, they recrystallize into brand new minerals and structures) while still holding a solid form.