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4vir4ik [10]
3 years ago
13

Complete the sentence. The universal solvent is ______ .

Physics
2 answers:
Sunny_sXe [5.5K]3 years ago
7 0

Answer:

Water

Explanation:

Water is known as universal solvent as it has the ability to dissolve many substances -more than any other liquid.

A molecule of water is polar in nature. It has two hydrogen atoms (has positive charge) and two oxygen atoms (has negative charge). Its polar arrangement gives it the ability to dissolve so many substances that makes it a universal solvent. Due to polar nature, it attracts different types of molecules.

satela [25.4K]3 years ago
4 0

The universal solvent is Water.

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A thermos bottle has two layers, a glass layer and a vacuum layer.
SIZIF [17.4K]

The vacuum layer is the better thermal insulator

Explanation:

Depending on how they conduct heat, materials can be classified into two types:

  • Thermal conductos: these are materials that are able to transfer heat efficiently. Examples of thermal conductors are metals in general: in fact, when you heat one side of a metal bar, the other end becomes hot very fast; this means that the heat has been transferred very quickly across the metal rod
  • Thermal insulators: these are materials that do not transfer heat well. In general, gases or rarefied substances are better insulators, because the particles are more spread apart, and therefore the heat (which is transferred by conduction through collisions between molecules) is transferred less efficiently, due to the large distance between the particles.

In this sense, vacuum is the best possible insulator. This is because vacuum contains no particles at all, so there cannot be transfer of heat by conduction (because there cannot be collisions between molecules), and therefore, vacuum is the best thermal insulator.

Learn more about heat:

brainly.com/question/3032746

brainly.com/question/4759369

#LearnwithBrainly

4 0
3 years ago
a rock with a mass of 10.0 kg is balanced on top of a large boulder. describe the forces acting on the rock, and use the concept
denis-greek [22]

Explanation:

The forces acting on the rock include Normal Force, Gravitational force & Friction force

It's possible for it to stay on the boulder because the normal force balances it's weight. also because static friction acts on the boulder up to it's limiting friction even if it were on an attempt to move as a result of air resistance. gravitational forces act upon it by mainly affecting it it's weight. as altitude increases, it's weight decreases since gravity varies from a height to another.

7 0
2 years ago
Describe the properties of oceanic crust
PSYCHO15rus [73]

Answer:

Not including a sedimentary cover of variable thickness and composition, the oceanic crust consists of three layers: (1) a relatively thin uppermost volcanic layer of basaltic lavas known as mid-ocean ridge basalts (MORB) erupted on the seafloor; (2) a thicker layer of more coarsely crystalline, intrusive basaltic 

6 0
2 years ago
What is the weight in pounds of a 7.0 kilogram bowling ball on earth's surface
hodyreva [135]

Gravitational field strength (GFS) on earth =10 N/kg

Weight = GFS x mass
W = 10 x 7
W = 70N
70N = 15.74 pounds
3 0
3 years ago
Read 2 more answers
Compare the KE of an 80 kg person walking at 4 m/s with that of the same person moving at 6 m/s.
Alla [95]
The correct answer is:
<span>KE at 4 m/s less than KE at 6 m/s

In fact, the formula for the kinetic energy is:
</span>K= \frac{1}{2} mv^2
<span>where m is the mass of the person and v his speed.

When the person is moving at 4 m/s, his kinetic energy is:
</span>K= \frac{1}{2} (80 kg)(4 m/s)^2=640 J
instead, when he's moving at 6 m/s, his kinetic energy is:
K= \frac{1}{2}(80 kg)(6 m/s)^2=1440 J

So, the kinetic energy at 4 m/s is less than the kinetic energy at 6 m/s.
7 0
3 years ago
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