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stich3 [128]
2 years ago
15

Which of the following is true regarding mixtures? a. One substance not combined with any other substances. b. Two or more subst

ances physically mixed and can be separated. c. Two or more substances that are impossible to separate d. One substance that forms a compound alone.
Physics
1 answer:
Brut [27]2 years ago
3 0

Answer:

aerga

dggzsd

Explanation:

szsdrgzsedg

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3 years ago
Mechanical waves propagate or move through a medium because
Schach [20]
Because the move through water
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2 years ago
Use Newton's laws to explain why a falling object dropped from a 57m tower accelerates initially but then reaches constant veloc
snow_lady [41]

Answer:

At the point of dropping the object, by Newton's first law due to gravitational force F_g = m × g, accelerates

By Newton's Second law the object reaches impacts on the air with the gravitational force resulting in changing momentum of m×(Final Velocity - Initial Velocity)

As the velocity increases, the rate of change of momentum becomes equivalent to the gravitational force and by Newton's third law, the action action and reaction are equal and opposite hence they cancel each other out

The body then moves at a constant uniform motion down according to Newton's first law

Explanation:

At the point the object of mass, m, is dropped from the height of the tower, the only force acting on the object is the gravitational force such that the object has an acceleration which is the acceleration due to gravity, g, and the gravitational force is therefore = m × g

As the speed of the object increases while the object is falling with the gravitational acceleration the rate at which the object cuts through layers of air which (by Newton's first law of motion, are at rest ) has some buoyancy effect also increases therefore, the object is constantly increasingly changing the momentum of the air which by Newton's second law results, at an high enough velocity, and by Newton's third law, in a force equal to the applied gravitational force

Therefore, the force of the air drag becomes equal to the gravitational force, cancelling each other out and the object then moves according to Newton;s first law, in uniform motion of a constant speed while still falling down.

5 0
3 years ago
Base your answer(s) to the following question(s) on the information and diagram
klio [65]

Done I don't know answer of this question or this photo is the answer can you tell me

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2 years ago
What can be absorbed or released as the result of a chemical reaction?
Lera25 [3.4K]
Energy is released or absorbed ,but no loss in total molecules,each of which consists of one atom of oxygen and two of hydrogen,are broken down.!
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3 years ago
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