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Yanka [14]
4 years ago
15

Why can the geologic record be analyzed by looking at different rock layers? The layers have different ages with the youngest la

yers on bottom. The layers have different ages with the youngest layers on top. All layers have the same age. The layers have different ages with the oldest layers on top.
Physics
2 answers:
KIM [24]4 years ago
8 0

Answer:

the rocks have diffrent agges with the youngest on top

Explanation:

Troyanec [42]4 years ago
4 0

The layers have different ages with the youngest layers on top.

Explanation:

Geologic records can be analyzed by merely looking at different layers because, the layers have different ages with the youngest layers on top and the oldest at the bottom.

  • Layers of rocks that can be analyzed this way are the sedimentary rocks.
  • Sedimentary rocks are formed by the lithificatiion and compaction of sediments in their basin of deposition.
  • According to one of the fundamental principles in geology, "in an undisturbed sequence of sediments, the oldest rock layer is at the bottom and the youngest is on top".
  • This principles is the principle of superposition of sedimentary strata.
  • It helps in relative dating of sedimentary rocks.

Learn more:

Sedimentary rocks brainly.com/question/9131992

#learnwithBrainly

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Please explain how to solve 17 and 18
andriy [413]

Answer:

17. h = l − l cos θ

18. 1.40 m

Explanation:

Let's call d the height of the triangle.  We can then say:

h = l − d

Using trig, we can write d in terms of l and θ:

d = l cos θ

h = l − l cos θ

If l = 6 m and l cos θ = 40°:

h = 6 − 6 cos 40

h ≈ 1.40

3 0
3 years ago
A ball is thrown vertically upward with a speed of 1.86
Inessa05 [86]

Answer:

t = 1.09 s.

Explanation:

This is a one-dimensional kinematics question, so the equations of kinematics will be sufficient to solve the question.

y-y_0 = v_0t + \frac{1}{2}at^2\\0 - 3.82 = 1.86t +\frac{1}{2}(-9.8)t^2\\-3.82 = 1.86t - \frac{1}{2}9.8t^2\\4.9t^2 - 1.86t - 3.82 = 0

This quadratic equation can be solved using determinant.

\Delta = b^2 - 4ac\\t_{1,2} = \frac{-b \pm \sqrt{\Delta} }{2a}\\t_1 = 1.09~s\\t_2 = -0.71~s

Of course, we will choose the positive time.

4 0
3 years ago
Which of these is the best definition of a fuel cell?
FrozenT [24]
<span>a cell producing an electric current directly from a chemical reaction

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8 0
4 years ago
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Which way does the friction arrow go in a free body diagram for a moving object point
True [87]

Answer:

Frictional force opposes relative motion between surfaces

Explanation:

Friction that exists when the object is not moving is called static friction.  In static friction ,If we are applying a force in the object the frictional force is in the opposite  direction . If it is not the case, there have been some net force and the object starts accelarating.

The main component of the contact force of two objects is normal force and that is in the perpendicular direction.  Frictional force is other complnent. This frictional force is parallel to the interface between objects. Frictional force opposes relative motion between surfaces.

7 0
4 years ago
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Milk with a density of 1020 kg/m3 is transported on a level road in a 9-m-long, 3-m-diameter cylindrical tanker. The tanker is c
jeka57 [31]

Solution :

Given data is :

Density of the milk in the tank, $\rho = 1020 \ kg/m^3$

Length of the tank, x = 9 m

Height of the tank, z = 3 m

Acceleration of the tank, $a_x = 2.5 \ m/s^2$

Therefore, the pressure difference between the two points is given by :

$P_2-P_1 = -\rho a_x x - \rho(g+a)z$

Since the tank is completely filled with milk, the vertical acceleration is $a_z = 0$

$P_2-P_1 = -\rho a_x x- \rho g z$

Therefore substituting, we get

$P_2-P_1=-(1020 \times 2.5 \times 7) - (1020 \times 9.81 \times 3)$

           $=-17850 - 30018.6$

           $=-47868.6 \ Pa$

           $=-47.868 \ kPa$

Therefore the maximum pressure difference in the tank is Δp = 47.87 kPa and is located at the bottom of the tank.

         

4 0
3 years ago
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