what is the first step of scientific method A.Hypothesis
B. question
C.control
D.procedures​

Answers

Answer 1

Answer:

B

Explanation:

Question. You need to ask questions before you can set up to perform an experiment.


Related Questions

6. In our modern times, the atom can be subdivided into
A.) protons and electrons, only

B.) protons and neutrons, only

C.) protons, neutrons, and electrons, only

D.) neutrons and electrons, only

Answers

Answer:

C.) protons, neutrons, and electrons, only

Explanation:

According to the modern atomic theory, we can distinguish 2 parts in an atom:

The nucleus, where is the majority of the mass of the atom, that is, protons and neutronsThe external shell, where are the electrons.

In a neutral atom, there are the same number of protons (positive charges) as electrons (negative charges).

What unit do we measure force in?

Answers

Answer: Newton

Explanation:

The SI unit of force is the newton, symbol N. The base units relevant to force are: The metre, unit of length — symbol m. The kilogram, unit of mass — symbol kg.

You measure force in Newton’s.

The number of yeast cells in a laboratory culture increases rapidly initially but levels off eventually. The population is modeled by the function а n = f(t) = 1 + be-0.90 where t is measured in hours. At time t = 0 the population is 30 cells and is increasing at a rate of 24 cells/hour. Find the values of a and b. a = b = According to this model, what happens to the yeast population in the long run? O The yeast population will shrink to 0 cells. The yeast population will stabilize at 270 cells. The yeast population will stabilize at 135 cells. The yeast population will stabilize at 8 cells. O The yeast population will grow without bound.

Answers

Answer:

Explanation:

[tex]n=f(t)= \frac{a}{(1+be^{-.9t})}[/tex]

At t = 0

30 =  [tex]\frac{a}{1 + b }[/tex]

30 + 30 b = a

 [tex]\frac{dn}{dt} =f(t)= \frac{-.9abe^{-.9t}}{(1+be^{-.9t})^2}[/tex]

For t = o

[tex]\frac{dn}{dt} =f(t)= \frac{.9ab}{(1+b)^2}[/tex]

given

24 = [tex]\frac{.9ab}{(1+b)^2}[/tex]

24 = [tex]\frac{30\times.9b }{1+b}[/tex]

24 = 27b / 1 + b

24 + 24 b = 27 b

24 = 3 b

b = 8

a = 30 + 30 x 8 = 270

[tex]n=f(t)= \frac{a}{(1+be^{-.9t})}[/tex]

Put t = infinity

n = a = 270

So at infinite time yeast population will stabilise at number 270 .

An aluminium atom has a mass number of 27 and a proton number of 13. How many neutrons does this aluminium atom contain?

Answers

Explanation:

14 neutrons

Explanation: The mass number is the total number of protons and neutrons in a nucleus. The atomic number is the number of protons in the nucleus. →27−13=14 neutrons!

Science Graded Assignment Help. Extra points! Due by: 29th of October

Answers

1. Cells are the basic unit of all living things
2. An organ is a group of several tissues working together while an organ system is a group of Organs that work together to perform functions
3. Your organ system works at a level that keeps you body functioning constantly.ex respiratory system, circulatory system work together to provide oxygen
4. I’m sorry but I don’t know this one :(
5. When the balance your organ system creates stops working, your health as a whole will suffer.

Write the difference between isomerism and allotropy with one example each.

Answers

Answer:

hope it helps ..

Explanation:

Allotropes can be defined as different types of compounds made out of the same single element but in different chemical formulas and different arrangements. Isomers can be defined as the chemical compounds that have a similar molecular formula but with different structural formulae. Graphite and Diamond.

HELPP PLEASE
Isotopes have different number of........... *

Protons
Electrons
Neutrons
Protons and Neutrons

Answers

Answer:

neutrons. they have the number of protons and electrons

Neutrons because neutrons are neutral so this means the element doesn’t change

helppppppppppppppppppppppppppppppppppppppppppppppppp

Answers

Answer:   it is a

Explanation:

Math and science skills




Please answer


1.
|Predict|
2.
|Use variables|
3.
|Plan and conduct investigations|
4.
Draw conclusions
5.
Hypothesize
6.
Measure
7.
Classify and order
8.
Record and display data
9.
|Use time and space relationships|
10.
Use numbers

Answers

Answer:6

Explanation:

This chart shows characteristics of three different types of atoms.

A 3-column table with one row titled valence electrons in three types of atoms. The first column labeled Atom X has entry 6 valence electrons. The second column labeled Atom Y has entry 2 valence electrons. The third column labeled Atom Z has entry 8 valence electrons.
Which statement is best supported by the information in the chart?

Atom X will donate electrons to Atom Y.
Atom X will accept electrons from Atom Y.
Atom Y will accept electrons from Atom Z.
Atom Z will donate electrons to Atom X.

Answers

Answer is Atom X will accept electrons from Atom Y.

Atom X will accept electrons from Atom Y.

What is Chart?

The official 511 traveller information service for Maryland is CHART Web. Maryland 511 gives drivers dependable, up-to-date information about traffic, road closures, and weather-related traffic events and conditions.

When driving in Maryland, MD 511 assists drivers in getting to their destination in the safest and most effective way possible.

The term "chart" (sometimes referred to as "graph") refers to a graphical representation of data visualization in which "the data is represented by symbols, such as bars in a bar chart, lines in a line chart, or slices in a pie chart".

Therefore, Atom X will accept electrons from Atom Y.

To learn more about chart, refer to the link:

https://brainly.com/question/15507084

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A student redid the experiment of mixing room-temperature water and warm
water. This time, she doubled the amount of room temp water. How will the final
temperature be different?
A- It will be higher, because the amount of water in the mixture is greater.
B-It will be lower, because the temperature of the room-temperature water will not increase as much.
C-It will be the same because all parts of the mixture will end up at the same temperature.
D-It will be higher, because all parts of the mixture will end up at the same temperature.

Answers

Answer:

B) It will be lower, because the temperature of the room-temperature water will not increase as much.

Explanation: I took the test

which natural disaster is most unpredictable?

Answers

Answer:

Explanation:

Earthquakes

Earthquakes: Nature's most unpredictable and one of her most devastating natural disasters.

Answer:

Earthquake

Explanation:

Because we have not discovered any high techto predict it, In 2011 a 9.0 earthquake hit the coast of Sendai they had no warning

What are covalent bonds

Answers

Answer:

A covalent bond, also called a molecular bond, is a chemical bond that involves the sharing of electron pairs between atoms. These electron pairs are known as shared pairs or bonding pairs, and the stable balance of attractive and repulsive forces between atoms, when they share electrons, is known as covalent bonding

what kind of rock requires heat and pressure to form?
A-sedimentary rock
b-igneous rock
c-clastic rock
d-metamorphic rock

Answers

Answer:

Sedimentary rock can change into metamorphic rock or into igneous rock. ... Igneous rock forms when magma cools and makes crystals. Magma is a hot liquid made of melted minerals. The minerals can form crystals when they cool.

Explanation:

answer: d-metamorphic rock

What are some of the regulations about cell phone waste?


Are the regulations the same everywhere, which countries have different regulations?


New technology to reduce waste?


Pls and thank you!

Answers

What are some of the regulations about cell phone waste?

In general, companies take part in the responsibility of taking back the e-waste resulted from their products.

Are the regulations the same everywhere, which countries have different regulations?

In 2005, two important directives were published in the European Union. The first stipulates that: 1) all manufacturers selling electrical and electronic equipment in and to EU countries label the equipment to inform customers that it must be recycled and 2) make sure that their products are properly disposed of or recycled after the life cycle. The second requires manufacturers to eliminate or minimize the use of lead, mercury, hexavalent chromium, cadmium, polychrome and diphelin biphenyl ethers in electrical and electronic equipment sold in the EU after 1 July 2006.

New technology to reduce waste?

Companies are trying to reduce the amount of resources needed in order to create their products. One alternative is the modular smarthphones, which aims to reduce the amount of e-waste of the phone by only upgrading a few elements of hardware.

Is fire considered matter

Answers

Matter is anything that has mass and occupies space. ... The flame itself is a mixture of gases (vaporized fuel, oxygen, carbon dioxide, carbon monoxide, water vapor, and many other things) and so is matter. The light produced by the flame is energy, not matter.

Answer:

Fire is a state of matter

Explanation:

Fire is the fourth state if matter called plasma fire is one of thr naturally occuring plasmas we have in existance on earth!

PLEASE HELP FAST !!!
How should measurement of car 2 be taken to accurately measure the distance it travels? Be sure to include where the meter stick should be placed.

the experimental setup, with car 1 is at the top of a ramp and car 2 at the bottom of the ramp

car 1
/ ←top of ramp
/ ←bottom of ramp
car 2

Answers

answer

The meter stick should be placed at the starting position of car 2 at the base of the ramp so that it measures the part of car 2 that will end up the furthest away from the base of the ramp.

explanation

i dont know if this is right or not but my teacher gave me a 90 so there is a 50/50 chance its right or wrong

How many atoms are present in 48.60 g ofMg

Answers

Answer: Explanation:

There are 6.02 x 10^23 atoms in 1 mol.

which of the following units of measurement would you use to describe the length of your pencil?

Answers

centimeter. cm.
you can also use it for a book

Answer:

cm

Explanation:

cm is the most appropriate unit - metres is too big and mm is too small

How many inches are in 4 yards? ( 1 yard = 3 ft and 1 ft = 12 inches)

Answers

Answer:

There are 144 inches in 4 yards.

Hope this helps :)

Explanation:

Answer: 144

Explanation:

The Periodic Table of elements is arranged by:
O atomic mass
O number of neutrons
O number of electrons
O atomic number

Answers

Option D, atomic number is the correct answer

Answer:

D. Atomic Number

Explanation:

All of the elements in the periodic table are arranged according to their atomic number.

which in the following best describe carbon
a high density
b. ductile
c. Conductive
d. brittle

Answers

i just know it’s not conductive or brittle
I think the answer is brittle

What happens to the tape at the closer markers compared to the markers that are further away?

Answers

The tape gets smaller when it is farther away

Why the noble gases are found in small amounts in the earth's atmosphere?

Answers

Answer:

They have completely filled outermost shell

Explanation:

The noble gases are the rarest and occur in trace amounts in the atmosphere because they have completely filled outermost and this makes them unreactive with other elements.

Elements become abundant as they combine with other species to form compounds.

Noble gases on the other hand have a high level of stability and do not readily combine with other species.

Some of these gases are :

        Helium

        Neon

        Argon

        Krypton

        Xenon

       Radon

They have very high ionization energy and very low electron affinity and so will not readily react.

which two formulas represent compounds?

A.NaCI
B.HCI
C.H2
D.Ag

Answers

Answer: A and B

Explanation: A and b are Sodium chloride and Hydrogen chloride which are both compounds.

Answer: A. NaCI

Explanation: APEX

what are twoparts of an atom

Answers

The answer is neutrons and protons.

Hope you got it!!

3.6 x 10-6 in standard notation.

Answers

Answer: 0.000036

Explanation:The standard form is just the normal method of depicting a number. To get from scientific notation to standard form, you would multiply the number from the scientific notation by the increasing / decreasing factor (10n). When the factor decreases, the 10 is raised to a negative power and the decimal moves to the left n amount of times (example the

10−5 moves your decimal in 3.6 over to the left 5 times leaving you with 0.000036). The opposite is true for increasing factors.

3.6 x 10⁻⁶ in standard notation is 0.0000036.

Standard notation refers to the conventional symbols, terms, and formats used to represent mathematical, musical, scientific, or other technical concepts.

Scientific notation is a way to express very large or very small numbers using powers of 10. It is commonly used in scientific and mathematical calculations to represent numbers that are too big or too small to be conveniently written in standard decimal notation.

To convert a number in scientific notation to standard notation, multiply the coefficient by the power of 10.

In 3.6 x 10⁻⁶, the coefficient is 3.6 and the exponent is -6.

To convert it to standard notation:

3.6 x 10⁻⁶  = 0.0000036

To learn more about the standard notation, follow the link:

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Which model represents an element?​

Answers

Answer: Water. Earth. Fire. Air.

Explanation: the four nations lived together in harmony. Then, everything changed when the Fire Nation attacked. Only the Avatar, master of all four elements, could stop them, but when the world needed him most, he vanished. A hundred years passed and my brother and I discovered the new Avatar, an airbender named Aang. And although his airbending skills are great, he has a lot to learn before he's ready to save anyone. But I believe Aang can save the world."

PLEase help i will give brainliest

Consider the information provided in experiment #3 Figure 2. Three different variables are compared for C3H8 (propane) and H2O (water). The strength of the intermolecular forces are responsible for the behavior of the two compounds.
Identify the intermolecular force for the two compounds.

Which one is stronger?

Explain how the strength of intermolecular forces plays a role in at least two of the properties (volatility, boiling point, or surface tension) for C3H8 (propane) and H2O (water).

Cite evidence from the data to explain your reasoning.


Experiment #3: The student follows study #2 with a comparison of propane (C3H8) and water. Volatility is the tendency for a substance to vaporize and it was found that propane vaporizes quickly while water vaporized slowly. Surface tension is a physical property equal to the amount of force per unit area necessary to expand the surface of a liquid. It is this phenomenon which allows a water strider or lizard to run across the surface of water.

Answers

Answer:

what kind of school u doin? lol

Which phrase describes a metamorphic rock?
formed from a volcano
was once buried underground
formed from evaporating water
contains minerals that have not changed

Answers

Answer:

C: was once buried underground

Explanation:

Hope this helps!

Answer:

The correct answer you are looking for is B i have got 100% on this test.

Explanation:

hop this helps! └(^o^)┘  ↖(^ω^)↗

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