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vova2212 [387]
2 years ago
15

What causes a liquid to freeze? A. When particles speed up and get closer together. B. When particles stop moving. C. When parti

cles slow down and get closer together. D. When particles speed up and get farther apart.​
Physics
1 answer:
Fittoniya [83]2 years ago
3 0

Answer:The answer is C

Explanation:

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A 5-kg concrete block is lowered with a downward acceleration of 2.8 m/s2 by means of a rope. The force of the block on the Eart
maksim [4K]

When the body touches the ground two types of Forces will be generated. The Force product of the weight and the Normal Force. This is basically explained in Newton's third law in which we have that for every action there must also be a reaction. If the Force of the weight is pointing towards the earth, the reaction Force of the block will be opposite, that is, upwards and will be equivalent to its weight:

F = mg

Where,

m = mass

g = Gravitational acceleration

F = 5*9.8

F = 49N

Therefore the correct answer is E.

5 0
3 years ago
What is the density of 18.0-karat gold that is a mixture of 18 parts gold, 5 parts silver, and 1 part copper? (These values are
nexus9112 [7]

Answer:

Density of 18.0-karat gold mixture is 15.58 g/cm^3.

Explanation:

A mixture of 18 parts gold, 5 parts silver, and 1 part copper.

Let mass of gold be 18x

Let the mass of silver be 5x

Let the mass of copper be 1x

The density of gold = 19.32g/cm^3

The density of silver = 10.1g/cm^3

The density of copper =8.8g/cm^3

Volume=\frac{Mass}{Density}

Volume of the gold in the mixture = V_1=\frac{18x}{19.32 g/cm^3}

Volume of the silver in the mixture = V_2=\frac{5x}{10.1 g/cm^3}

Volume of the copper in the mixture = V_3=\frac{1x}{8.8 g/cm^3}

Mass of the mixture = M = 18x+5x+1x =24x

Volume of the mixture = V_1+V_2+V_3

Density of the mixture:

\frac{M}{V_1+V_2+V_3}=15.58 g/cm^3

8 0
3 years ago
What is the kinetic energy of a 55 kilogram skier traveling at meters per second
Rasek [7]
How many meters per second was it traveling
4 0
3 years ago
A. <br> B.<br> C.<br> D.<br> Please help
MA_775_DIABLO [31]

Answer:

The answer is A, B, C and D

Explanation:

(is that how it works?)

8 0
3 years ago
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What is the best book for physics practicals??(pdf)
scoray [572]

Answer:

I would strongly recommend Exploring Quantum Physics through Hands-on Projects for physics practicals.

Explanation:

  • Though it is not about books, but it is solely on you how you want to get knowledge. If you are truly passionate about learning physics in a practical way "Exploring Quantum Physics through Hands-on Projects" will be the best one out there.
  • Besides "Laboratory Projects in Physics, a Manual of Practical Experiments for Beginners" is also a promising one.
  • There are detailed chapters on important topics like light as a wave and particles, atoms and radioactivity, Schrödinger, etc.
  • If you wisely follow these books, you will surely get all your doubts cleared and learn new mechanisms easily.
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3 years ago
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