Physics, 15.07.2019 01:30 DESI111609

Mineral replacement, carbon film and molds are a few examples of a. fossil formation b. fossil index c. fossil preservation d. ancient enviorments ! i'll give

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Answer from: la200564

The answer is c fossil prevention
you can completely cancel out D and A so its a choice between B and C
and you know its fossil prevention because fossil index means a fossil that is needed for dating.

Answer from: bazsinghnagoke

The answer is C i.e. fossil preservation.

Explanation:

Mineral replacement: Dead plants and animals in the water bodies are buried in mud. With time soft tissue decays and hard bones are left. On top of this sediments build up, when the bone enclosed inside the sediment decays, it gets replaced by the minerals.

Carbon films: carbon films appear as imprints on the rocks of specimens such as leaves.

Molds: Carbon films are two dimensional imprints whereas molds are three dimensional impressions of organisms. When organism buried in the sediments get decayed leaving a cavity, it gets filled with material making a mold.

Answer from: Quest

the current is 0.6

voltage ÷ resistance = current

so 12 ÷ 20 = 0.6

Answer from: Quest

m₁v₁ + m₂v₂ = (m₁ + m₂)vmomentum is conserved.the left-hand side of the equation represents the momentum in the system before the collision.the right-hand side represents the momentum in the system after the collisionm₁ and v₁ represents the mass and the velocity of the physics blockm₂ and v₂ represents the mass and velocity of the ball of puttyv represents the final velocity of the combined mass.the question states the two masses stick together. they combined mass has its own velocity with the body mass the sum of the two objects' massestheir combined momentum is (m₁ + m₂)vto find the magitude of (m₁ + m₂)v, we need to add the vectors on the left-hand side of the equation: m₁v₁ + m₂v₂.note the diagram. i have positioned the vectors in accordance with their directions.the magnitude of the resultant can be calculated using the pythagorean theorem since this is a right triangle situation (north and west are perpendicular)|(m₁ + m₂)v| = √[ (m₁v₁)² + (m₂v₂)² ]|(m₁ + m₂)v| = √[ (1.5kg·8.0m/s)² + (0.40kg·20m/s)² ]|(m₁ + m₂)v| = 14.4 kg m/sfor two significant figures (assuming that 20m/s is two), this rounds to 14 kg m/s

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