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Furkat [3]
3 years ago
8

Which best describes convection

Physics
2 answers:
Dmitriy789 [7]3 years ago
7 0
It is driven by tempature differences within the fluid

Inessa [10]3 years ago
4 0

Correct answer: transfer of heat by the actual movement of warmed matter. Because warm air rises and cooler air falls due to density differences. My son just took this quiz.

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A foot player runs 1.6m/s and has a KE of 790 J. What is his mass?
Mariana [72]
The equation for kinetic energy is,

Ke = (1/2)mv^2.

You're given a kinetic energy of 790 joules, and a speed of 1.6 m/s. Plugging these values into the equation, we get,

790 = (1/2)(1.6)^2(m).

Solving for m, we get,

m = (790)/(0.5(1.6)^2).

I'll let you crunch out those numbers for yourself :D

If you have any questions, feel free to ask. Hope this helps!
3 0
3 years ago
A textbook is pushed across a desk. It experiences what type of force ​
In-s [12.5K]

Answer:

kinetic friction force

Explanation:

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Which statements accurately describe Dmitri Mendeleev’s contributions to the development of the periodic table? Check all that a
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He produced the first orderly arrangement of known elements, he used patterns to predict undiscovered elements
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3 years ago
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What are the names of the 2 charged particles in an atom and what are their charges
Sholpan [36]

Answer:

Protons and electrons

Explanation:

  • The atoms are made up of protons, neutrons, and electrons.
  • The physical and chemical characteristics of an atom are determined by the number of these particle composition.
  • The protons present in the center of an atom called the nucleus is positively charged.
  • The neutrons are also located in the nucleus of an atom with no charge.
  • The electrons has a negative charge and it is placed around the nucleus having different shells and quantum state.
  • The charges of the protons and electrons are denoted by +q and -q. The quantization of these charges are +1, +2, ... and -1, -2, .... etc.
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Why do scientist use different types of models to represent compounds
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Because they are different they all show different traits.
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