Answer:
metric system
Explanation:
Scientists use the metric system, which uses the following base units: 1. Meter for length 2. Gram for mass 3. Liter for volume 4. Second for time Different prefixes
elements Combine with atoms with F in the same ratio as atoms of Mg
Answer: Chemical symbols are used to represent atoms and elements. A compound consists of atoms of two or more elements combined in a small, whole-number ratio. Atoms of each of its elements are always present in the same ratio
Explanation:
Jose completed an observational investigation to determine how many butterflies visited his garden each hour for one day Which option best explains why would Jose choose to complete an observational investigation?
He was able to count the number and type of butterflies that visited the garden,
He was observing the behavior of butterflies and could not control the variables
O He wanted to test how he could increase the number of butterflies visiting his garden
He was able to create a model of his garden showing the location of flowers and butterflies.
Answer:
He was able to count the number and type of butterflies that visited the garden,
Explanation:
what is the total charge? plz help!
Answer:
0
Explanation:
Protons have a positive + charge.
Neutrons have a neutral (0) charge.
Electrons have a negative - charge.
In order to determine the charge of an atom, we only look for the protons and neutrons.
We are given 2 protons and 2 electrons
+2 charge + -2 charge = 0 charge.
This atom is a neutral atom.
The volume of CO2 at 99.3 kPa was measured at 455 cm3. What will the volume be if the pressure is adjusted to 202.6 kPa?
Answer:
The answer is 223.0 cm³Explanation:
To find the volume when the pressure is at 202.6 kPa we use Boyle's law which is
[tex]P_1V_1 = P_2V_2[/tex]
where
P1 is the initial pressure
P2 is the final pressure
V1 is the initial volume
V2 is the final volume
Since we are finding the final volume
[tex]V_2 = \frac{P_1V_1}{P_2} \\[/tex]
From the question
P1 = 99.3 kPa = 99300 Pa
V1 = 455 cm³
P2 = 202.6 kPa = 202600
So we have
[tex]V_2 = \frac{99300 \times 455}{202600} = \frac{45181500}{202600} \\ = 223.008390...[/tex]
We have the final answer as
223.0 cm³Hope this helps you
What is the mass number of hydrogen? DUE TODAY!!!!
Consider a wooden chair and a balloon. What do these two
objects always have in common?
A.Both are made of the same number of atoms.
B.Both have the same mass number.
C.Both are made of the same kind of atom.
D.Both are made of atoms.
Answer:
D)
Explanation:
It is the most realistic
HURRY!!
In models of molecules, gray spheres are carbon atoms,
white spheres are hydrogen atoms, red spheres are oxygen
atoms, and blue spheres are nitrogen atoms.
Which model represents a molecule of ammonia, NH3 ?
In model of molecules, gray spheres are carbon atoms, white spheres are hydrogen atoms , red spheres are oxygen atoms and blue spheres are nitrogen atoms. the model represent a molecule of NH₃ is model (A) that contains one blue sphere and 3 white sphere.
Ammonia (NH₃ ) is formed with three atoms of hydrogen and one atom of nitrogen. In the molecule of NH₃ , three hydrogen atoms each shares their electron with nitrogen and form the covalent bond and molecule is formed NH₃ . in the given model (A) 3 white spheres of hydrogen are covalently bonded with one blue sphere of nitrogen.
Thus, In model of molecules, gray spheres are carbon atoms, white spheres are hydrogen atoms , red spheres are oxygen atoms and blue spheres are nitrogen atoms. the model represent a molecule of NH₃ is model (A) that contains one blue sphere and 3 white sphere.
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Which of the following represent a chemical compound? a. Cr b. CO c. Au d. Mg
(50 POINTS) Why does the radius of an atom increase as you go down a group on the periodic table?
A) because you are increasing the size of the electrons, which takes up more space
B) because you are adding another outer level of electrons, further from the nucleus
C) because you are adding more neutrons, which reduces the attraction between proton and electron
D) because you are decreasing the pull by the nucleus, allowing the electrons to travel further away
Answer:
B
Explanation:
The atomic radius increases as you go down a group in the periodic table. Atoms get larger because more electrons are being added in higher energy levels, and each energy level is further from the nucleus than the last. Therefore, the atomic radius increases as you go down a group.
can someone help me please
Can anyone answer this
Answer:
d
Explanation:
The science of life or living matter in all it’s forms and phenomena? What’s it’s vocab answer?
Answer:
Biology
Explanation:
Which word describes an artificial pond with raised edges used for agriculture?
shaduf
paddy
aqueduct
chinampa
Answer:
Paddy
Explanation:
he word paddy is used to describe an artificial pond with raised edges which are used for agriculture.
The word describes an artificial pond with raised edges used for agriculture is paddy. Therefore, option B is correct.
What do you mean by an artificial pond ?Seldom do artificial ponds have a natural outflow and entrance. This indicates that they only get fresh water from rain and direct activity, such a partial water change.
Ponds have a variety of functions, including providing water for farming and livestock, assisting in habitat restoration, acting as fish hatcheries, being parts of landscape architecture.
The paddy ponds are man-made ponds with elevated sides that are utilised for agriculture. These ponds are primarily used to easily supply crops with a suitable amount of water. These ponds are kept full of water, and rainwater is also collected and stored there.
Thus, option B is correct.
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Which is more scientific, what is the air made out of? or why is there air?
Answer:
why is there air
Explanation:
it sounds more smarter and sounds like something someone would want to know
Why is imaging the first black hole such an amazing scientific achievement? Explain.
Answer:
The photographic evidence of a long-unseen cosmic force is an extraordinary achievement in science. ... Exciting as it is, the photo actually doesn't capture the black hole itself, nor its interior. Astronomers aimed their telescopes at the event horizon, the invisible boundary thought to surround all black holes
Explanation:
Hope this helps :)
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Answer:yyyyyyyyyeeeeeeetttttt you will figure it out
Explanation:
8. Converting Units The volumes in your data are in millimeters, which are equivalent to cubic centimeters, cm3. But your areas are in units of square meters (m2). To combine these, you will have to convert to similar units. Convert one of your volume measurements from units of cm3 to units of m2, showing your work. (Remember that 1 ×106 cm3 = 1 m2.)
Answer:
This question is a practical question and hence incomplete
Explanation:
However, there are some steps that can be followed to achieve the aim of this question.
To convert millimeters (mm) to cubic centimeters (cm³), the value in millimeter will have to be divided by 1000. This is because 1 mm equals 0.001 cm³. Hence, if the volume in the data is 30 mm, the equivalent in cm³ will be
30/1000 = 0.03 cm³
OR
1 mm ⇒ 0.001 cm³
30 mm ⇒ ?
Let's assume the unknown (?) is X
1 × X = 30 × 0.001
X = 0.03 cm³
Hence, 30 mm equals 0.03 cm³
Also, to convert any volume from cubic centimeter (cm³) to square meter (m²), you will divide the unit in cm³ by 1 × 10⁶ (1,000,000). To convert the value obtained earlier (0.03 cm³ or 3 × 10⁻² cm³) to m², you will
1,000,000 cm³ ⇒ 1 m²
0.03 cm³ ⇒ ?
Let's assume the unknown (?) is Y
1000000 × Y = 0.03 × 1
Y = 0.03/1000000 OR you can write it as 3 × 10⁻² × 10⁻⁶
Y = 3 × 10⁻⁸m²
Hence, 0.03 mm equals 3 × 10⁻⁸ m²
1. TRUE or FALSE: A COMPOUND CAN BE BROKEN DOWN INTO SIMPLER SUBSTANCE BY PHYSICAL MEANS
2. A(N) _______IS A RADIOACTIVE FORM OF AN ELEMENT INDICATING THAT QUANTITY OF NEUTRONS HAVE CHANGED TO CREATE SUCH AN ELEMENT
A. Element
B. Isotope
C. Ion
D. Neutron
Answer:
B. Istope
Explanation:
How might scientific knowledge about monoculture farming affect societal decisions? Please be sure to answer in complete sentences
Answer:
People could choose to practice organic farming, heirloom plants, or use GMOs.
Governments could pass laws to limit the use of monoculture farming.
Governments could pass laws requiring people to use alternate farming methods.
Get that 100.
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Which element does not have similar chemical characteristics as phosphorus (P)?
answers:
Antimony (Sb)
Nitrogen (N)
Arsenic (As)
Oxygen (O)
True/False The atoms of a gas are the most tightly packed of the 3 states of matter.
Answer:
false
Explanation:
because solid is the most tightly packed out of gas and liquid .
In your own words, describe how the energy of a pendulum is changed as it moves through one cycle of its motion. Pls help online school sucks
In a perfect world without air resistance, the top of the swing would have the most potential energy, but the least amount of kinetic energy. As the pendulum falls down, it gains more kinetic energy as it travels faster due to gravitational acceleration but loses more potential energy as it loses height. The total amount of energy in the system (the sum of kinetic and potential energy) stays the same.
The energy of a pendulum is changed from Kinetic to Potential Energy (and vice-versa) when it moves through one cycle of its motion.
What is Kinetic Energy ?The kinetic energy of an object is the energy that it possesses due to its motion and is defined as the work needed to accelerate a body of a given mass from rest to its stated velocity.
Having gained this energy during its acceleration, the body maintains this kinetic energy unless its speed changes.
When we move the bob of the pendulum to start the movement you "charge" it with Potential Energy (Gravitational) by varying its position (height) in relation to the ground.
When we release the bob it moves towards the equilibrium position changing Potential into Kinetic Energy (through the movement with Velocity).
At the equilibrium point the bob doesn't stop but goes on up to the same height "re-charging" it with Potential Energy.
The sum of Kinetic (K) and Potential (U) Energy (called Mechanical Energy is always the same:
E = K + U = constant
Therefore, The energy of a pendulum is changed from Kinetic to Potential Energy (and vice-versa) when it moves through one cycle of its motion.
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Is the electron arrangement in a sodium ion
similar to neon or to argon?
Answer:
Just as some elements attain a noble gas configuration by gaining some extra electrons, other elements can more easily gain that configuration by losing some electrons. For a sodium atom, it is simply closer to get to the same configuration as neon than it is to get to the same configuration as argon.
when 1337 G of solid dry ice sublimates into gas the mass of the resulting gas is
Answer:
194.65 K
Explanation:
(−78.5 °C −109.3 °F)
Answer:
equal to the mass of the solid dry ice.
Explanation:
The mass of the gas is dependent on the mass of the solid dry ice.
Find the mass of a 50.0 ml quantity of water if the density of water is 3.25 10 poin g/ml * O 15.38 g O 162.5 g 0.0659 O 124.3g What is an extensive property? * 10 poli
What is the density of a sample of lead that has a mass of 4.85 kg and a density of 280 cm ^3?
Answer:
The answer is 0.017 kg/cm³Explanation:
The density of a substance can be found by using the formula
[tex]density = \frac{mass}{volume} \\[/tex]
From the question
mass = 4.85 kg
volume = 280 cm³
We have
[tex]density = \frac{4.85}{280} \\ = 0.01732...[/tex]
We have the final answer as
0.017 kg/cm³Hope this helps you
The density of water is 1g/cm3. What might be the density of an object that floats in water
Answer:
The mass of water is known to be 1 g/mL or 1 g/cm3. If an object has a density greater than 1 g/cm3, it is denser than water and will sink. If it has a density of less than 1 g/cm3, it will float. For example, a penny is made out of zinc (7.14 g/cm3) and copper (8.96 g/cm3) so it sinks in water.
Explanation:
Please help meee!!!
Answer:
Wood
Explanation:
Because the nail is driven into the wood by the force of the hammer.
Which of the following is true about science and technology? A. Advancements in science cannot lead to advancements in technology, but technological advancements can lead to scientific advancements. B. Advancements in science can lead to advancements in technology, and technological advancements can also lead to scientific advancements. C. Advancements in science cannot lead to advancements in technology, and technological advancements cannot lead to scientific advancements. D. Advancements in science can lead to advancements in technology, but technological advancements cannot lead to scientific advancements.
Answer:
c is the answer i am positive about that is it is wrong correct me plz
Explanation:
23 POINTS PLEASE ANSWER
Question:
Amy was observing the growth of five kinds of flowering plants on a windowsill. She noticed that some of the flowers on some of the plants turned toward the sun during the day, but the flowers on other plants did not turn toward the sun. She asked the following question.
“Why do living things sometimes change direction?”
Why is Amy’s question not a very good scientific question?
Options:
It is too broad.
It is based on her opinion.
It depends on moral judgments.
It leads to a hypothesis that can be tested.
Answer:
it was too broad
Explanation:
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ANSWER
it was too broad