PHYSICS MIDDLE SCHOOL

How is it possible for a single sedimentary rock to contain rock particles animal shells and minerals that crystallized from water?

Answers

Answer 1
Answer: "Sedimentary rocks are types of rock that are formed by the deposition of material at the Earth's surface and within bodies of water. Sedimentation is the collective name for processes that cause mineral and/or organic particles (detritus) to settle and accumulate or minerals to precipitate from a solution."
Answer 2
Answer: Because as the process is making the sediments the fossils and other shrub is washed up together then formed into the rock. When the process is making all sediments the sediments have broken up particles which can be fossils and other things.

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A bookcase has a base of 1 m long and 0.5 m wide. It has a mass of 300kg. Find the pressure it exerts on the floor in kPa.

Answers

1m*0.5m=0.5m^2\n g=10(m)/(s^2)\n 300kg*10(m)/(s^2)=3000N\n 3000N--0.5m^2\n \ \ x\ \ --\ 1\n x=6000Pa=60kPa

What causes rocks to change composition when reacting with oxygen?
 Please help!!

Answers

Acid reactions and oxidation

Archimedes' principle says that a 15 N object is buoyed up by a force that is

Answers

Answer:

  • equal to the weight of the fluid that the body displaces

Explanation:

Archimides' principle states the definition of buoyant force.

These are the imporant features of the buoyant force that you need to know:

  • Except for the very special vacuum condition, every body is immersed in a fluid.

  • The body is subject, at least, to two forces, its weight and the buoyant force.

  • The weight is the result of the gravitational attraction exerted by the planet, and is equal to the mass of the object by the gravitational acceleration (approximately 9.8 m/s² on Earth). It is directed vertically downward.

  • The buoyant force is the vertical upward force that the fluid exerts on the object and is equal to the weight of the volume of fluid displaced by the object.

  • The volume of fluid that the body displaces is equal to the immersed volume of the body.

Answer:

an immersed object is buoyed up by force equal to the weight of the fluid it displaces

What process, driven by heat generated from within the Earth's core, occurs in the mantle and is a primary cause of plate tectonics?A.faulting
B.mantle convection
C.subduction
D.trench formation

Answers

Answer:

The correct option is (B)mantle convection

Explanation:

Tectonic plates at the earth's surface move because of the intense heat in the Earth's core. this heat causes molten rock in the mantle layer to move. It moves in a pattern called a convection cell and producing a movement called mantle convection which is the slow creeping motion of Earth's solid silicate.
The answer is B. Mantle convection.

Group__ contains elements like fluorine chlorine bromine iodine and astatine

Answers

Group 17  or vii   contain  element  like  fluorine, chlorine, bromine, iodine and  astatine


     explanation

  •  Group  17 element  in periodic table are  referred   to as halogen.
  • They have  7 valence electron
  • They are highly reactive
  • Have  a low   melting and boiling  point  but  increases  down the group
  • They have a tendency  to form salt
  • There electronegativity   decreases  down the group.

The ___ is a measure of the number of waves that pass a point in a given amount of time.

Answers

Frequency is the number of waves that pass a given point in a certain amount of time
The answer to this would be frequency
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