What is constant in all electromagnetic waves?

Answers

Answer 1

Answer:

their speed, which is the speed of light

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An ice cube melts when its mechanical energy increases.

Answers

false it only melts when its thermal energy increases. plus an ice cube has no mechanical energy.

Answer:

False!

Explanation:

____________ is the practice of raising fish and other water-dwelling organisms for foodA. Land Redamation
B. Aquifier
C. desertification
D. aquaculture

Answers

Answer is
d. aquaculture

it is d. aquaculture

Which kind of information is known about a person if that person’s DNA is in a database? A. how old the person isB. where the person was probably born
C. some diseases the person might have
D. whether the person is likely to commit a crime

Answers

the kind of information that we could know about a person if that person's DNA is in a database is : C. sme diseases the person might have Some diseases are proven to because by the passed DNA during reproduction process without any external factors. Example of these diseases are : sicle cell anemia and colorblindess

The correctt answer is C. some diseases the person might have on e2020.

Where do most water molds and downy wildews live?

Answers

Most water molds and/or downy mildews live in the water or in moist places, These organisms usually grow as tiny fuzz.

While digging in the backyard, you find an old coin. It’s mass is 26.76 g and it’s volume is 3 cm . What is the density?

Answers

Considering the definition of density, the density of the old coin is 8.92 $(g)/(cm^(3) )$ .

It is neccesary to know that density is defined as the property that matter, whether solid, liquid or gas, has to compress into a given space.

In other words, Density is a quantity that allows us to measure the amount of mass in a certain volume of a substance, that is, density is the relationship between the mass of a substance and the volume it occupies.

Mathematically, the expression for the calculation of density is the quotient between the mass of a body and the volume it occupies:

$density=(mass)/(volume)$

In this case, you know:

mass= 26.76 g
volume= 3 cm³

Replacing in the definition of density:

$density=(26.76g)/(3cm^(3) )$

Solving:

density= 8.92 $(g)/(cm^(3) )$

The density of the old coin is 8.92 $(g)/(cm^(3) )$ .

Learn more about density:

Density = mass/volume

26.76/3 = 8.92

The density is 8.92

In an electrically neutral atom of any element, there are equal numbers ofA)protons and neutrons.B)electrons and protons.C)electrons and neutrons.D)atomic number and atomic mass

Answers

Answer:

B) Electrons and protons

Explanation:

Each proton has a positive charge, and each electron has a negative charge. If the atom is electrically neutral, there must be the same number of electrons and protons.

A) and C) are wrong. Neutrons have no charge, so they can't counteract that of the protons or the electrons.

D) is wrong. The atomic number is the number of protons, and the mass number is the number of protons plus neutrons. The neutrons can't counteract the charge of the protons,

Final answer:

In an electrically neutral atom of any element, the number of electrons equals the number of protons. This balance gives the atom its neutrality. Atomic number and atomic mass do not directly relate to the atom's electrical state.

Explanation:

In an electrically neutral atom of any element, there are equal numbers of electrons and protons. This balance between the negatively charged electrons and positively charged protons ensures the overall electrical neutrality of the atom. Neutrons, which are neutral particles, do not affect electrical neutrality. The atomic number represents the number of protons in an atom while the atomic mass, close to the number of neutrons, is the sum of protons and neutrons.

Learn more about electrically neutral atom here:

brainly.com/question/33440812

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