Which statement describes magnetic force?
O A. Every magnet has three poles.
O B. All materials are magnetic.
O C. Magnets can only repel each other.
O D. A north pole and a south pole attract each other.

Answer:

If something were to weigh 30 kgs on Earth, they would also weigh around 66 pounds on Earth.

Explanation:

1 pound = 2.20462 kilograms.

Next, multiply 2.20462 and 30 and you should get 66.1386, or 66 pounds.

Answer:

18 neutrons

Explanation:

In the element;

         ₁₇Cl

The number of electrons in the chlorine atom is 17.

The mass number of chlorine is 35.

  Mass number is the number of protons plus number of neutrons.

 Mass number  = Protons + neutrons

      Neutrons  = mass number  - protons

Number of protons in chlorine is 17;

 So;

         Neutrons   = 35 - 17  = 18

Answer:

the soup become too salty through the process of osmosis

Answer:

i do not uterstand

Explanation:

Answer:

Yea fs

Explanation:

Answer:

Pneumonoultramicroscopicsilicovolcanoconiosis

Explanation:

Answer:

²³⁵₉₂U

Explanation:

The nuclear symbol of the nuclei is ²³⁵₉₂U.

The uranium nuclei has;

          mass number  = 235

          atomic number  = 92

To write the structure of the atom;

         The subscript before the symbol of the atom is the atomic number

        The superscript is the mass number

So;

      ²³⁵₉₂U is the symbol of the nuclei.

Answer:

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Answer:

Electromagnetic waves are ubiquitous in nature (i.e., light) and used in modern technology—AM and FM radio, cordless and cellular phones, garage door openers, wireless networks, radar, microwave ovens, etc. These and many more such devices use electromagnetic waves to transmit data and signals.

Explanation:

i mean there's alot of stuff that have Electromagnetic waves in it i mean alot!

The two examples of how energy from electromagnetic waves is used in technologies to do work are (i) For communication and radar radio waves are used. (ii) For cooking our food microwaves are used.

Electromagnetic waves are also called as EM waves are waves that are composed of vibrations between a magnetic field and an electric field. Electromagnetic wave are represented by a sinusoidal graph.

For communication and radar radio waves are used. For cooking our food microwaves are used. Infrared waves are used in remote controls. Mobile phones send microwave signals by the atmosphere.

Thus from the above conclusion we can say that The two examples of how energy from electromagnetic waves is used in technologies to do work are (i) For communication and radar radio waves are used. (ii) For cooking our food microwaves are used.

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The columns into which the elements were split are called groups and the elements in the same group display similar properties.

A group refers to elements that have similar chemical properties and occur in the same column in the periodic table.

Hence, the columns into which the elements were split are called groups and the elements in the same group display similar properties.

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Answer:

Explanation:

To find the number of moles in a substance given it's number of entities we use the formula

[tex]n = \frac{N}{L} \\[/tex]

where n is the number of moles

N is the number of entities

L is the Avogadro's constant which is

6.02 × 10²³ entities

From the question we have

[tex]n = \frac{5.7491 \times {10}^{25} }{6.02 \times {10}^{23} } \\ [/tex]

We have the final answer as

Hope this helps you

Answer:

Don't just walk up to a person you think is cute and ask them out. Start with small talk and gauge common interests. “See how they respond,” Overstreet says. “For example, if you approach someone and they don't reply, are short with you, or move further away, then move on.

Explanation:

Answer:

b

Explanation:

iron fillings are magnetic

Answer:

compound

Explanation:

Potassium iodide is a compound from the description given. The components of the compound is made up of elements and can only be broken down by chemical means.

When compounds are broken down they are made up of elements.

Answer:

Both

Explanation:

The combined gas law is also known as the general gas law.

From the ideal gas law we assume that n = 1;

So;

              PV  = nRT

 and then;

                  [tex]\frac{P_{1}V_{1} }{T_{1} }[/tex]  = [tex]\frac{P_{2}V_{2} }{T_{2} }[/tex]

   If we cross multiply;

                P₁V₁T₂   = P₂V₂T₁

  So;

         T₁ = [tex]T_{2} \frac{P_{1}V_{1} }{P_{2} V_{2} }[/tex]

Also;

         V₂  = [tex]V_{1} \frac{P_{1} T_{2} }{P_{2} T_{1} }[/tex]

So from the choices both are correct

Answer:

hope you like and pls follow me

Explanation:

digestive and circulatory system are most important in breaking down food and distributing nutrients throughout the body.

The study of chemicals and bonds is called chemistry.

The correct answer is 50, 50, and 70.

In an element, there are the following things:-

In elements, the number of protons and electrons are the same. hence, the number of electrons and protons in an element is 50.

The neutrons are defined as the proton minus mass number. Hence, the number of neutrons is 120-50=70

Hence, the answer is  50, 50, and 70

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Answer:Two metals that aren't magnetic are gold and silver.

Explanation:

Cobalt and nickel and El Fouladh

Answer: 11 electrons

Explanation: The atomic number of sodium is 11. This tells us that sodium has 11 protons and because it is neutral it has 11 electrons.

Answer: Nitric acid is used in the production of ammonium nitrate and calcium ammonium nitrate which find applications as fertilizers. Ammonium nitrate is also used in the manufacturing of urea ammonium nitrate (UAN) used in fertilizer formulations and also as explosives.

Explanation:

We can see here that some common uses of nitric acid:

Nitric acid is a highly corrosive and strong mineral acid. It is a clear or yellowish liquid that is commonly used in various industrial, laboratory, and chemical applications.

In its pure form, nitric acid is a colorless liquid, but it can have a yellowish tint due to the presence of nitrogen dioxide, which forms when nitric acid reacts with air.

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Answer:

c. h represents the total energy in a reaction

Answer:

B. It represents the heat involved in a reaction

Explanation:

It would make sense since most of the time h in chemistry

is the equivalent to heat.

I hope this helped you!

Answer:

Electrolysis, process by which electric current is passed through a substance to effect a chemical change. ... Electric current (i.e., electrons) enters through the negatively charged electrode (cathode); components of the solution travel to this electrode, combine with the electrons, and are transformed (reduced)

Answer:

v = 1130 cm³

Explanation:

Given data:

Volume of sample = ?

Mass of Al sample = 3.057 Kg (3.057 Kg× 1000g/1 Kg = 3057g)

Density of Al sample = 2.70 g/cm³

Solution:

Formula:

d = m/v

d = density

m = mass

v= volume

by putting values

2.70 g/cm³ = 3057g /v

v = 3057g /2.70 g/cm³

v = 1130 cm³

Explanation:

What type of floor. You have uploaded no image

Answer:

Explanation:

To find the number of moles in a substance given it's number of entities we use the formula

[tex]n = \frac{N}{L} \\[/tex]

where n is the number of moles

N is the number of entities

L is the Avogadro's constant which is

6.02 × 10²³ entities

From the question we have

[tex]n = \frac{12.04 \times {10}^{23} }{6.02 \times {10}^{23} } = \frac{12.04}{6.02} \\ [/tex]

We have the final answer as

Hope you this helps you

Answer:

Viscous Drag.

Slab-Pull Force.

Ridge-Push Force

Explanation:

your welcome have a nice day

Answer:

all i think

Explanation: