Answer:
Unbalanced forces acting on an object will change the object's motion. Unbalanced forces can also stop a moving object. The three main forces that stop moving objects are friction, gravity and wind resistance. Equal forces acting in opposite directions are called balanced forces.
Explanation:
Answer:
gravity holds the object in place
Explanation:
I need some good help
Answer:
lol
Explanation:
Answer:
felt that.__________
HURRY !The number of electrons in an atom decreases as you move from left to right in the periodic table.
Please select the best answer from the choices provided
T or F
I believe this is false, due to the fact that atomic radius decreases while you move right to left...but please, correct me if I'm wrong ^^'''
Answer:
False
Explanation:
Why are prefixes used in naming covalent compounds?
Answer:
1 - mono
2 - di
3 - tri
4 - tetra
5 - penta
6 - hexa
7 - hepta
8 - octa
9 - nona
10 - deca
Explanation:
These are prefixes that can go on an element.
For example:
CO2= Carbon Dioxide
Answer:
The same atoms can combine in more than one ratio.
Explanation:
Temperature is a measure of the average _____energy of particles in a substance.
Answer:
kinetic energy
Explanation:
Answer:
kinetic energy
Explanation:
In physics, the kinetic energy of an object is the energy that it possesses due to its motion. It 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.
Why are atoms neutral?
A They have neutrons in the nucleus
B. They have the same number of protons and electrons
They tend to have 8 valence electrons
D
None of the above
Answer:
B. They have the same number of protons and electrons
Explanation:
Protons have a charge of +1, electrons have a charge of -1, and neutrons have no charge, making them neutral. When there are the same number of protons as there are electrons, the charges balance out, leaving you with a neutral atom.
Magnetic substance is used to seperate
none magnetic substances.
False
True
Answer:
the answer should be true
hope this helps :)
Explanation:
Record the length of the object shown.
Answer: 7.26 mm
I did the test already.
the product of 173.06 times 0.21 should be reported as what using proper number of sig figs?
Answer:
36.3
Explanation:
The full answer would be 36.3426, but because of the 0.21, you round it down to 3 sig figs.
help plz really need your help if u know answer if u don't DO NOT ANSWER this is not the first time I have posted this question
T eg(1) : 97.5°C, T eg(2): 98.5°C, T eg(3): 99.2°C
∆T water(1): -2.5°C, ∆T water(2): -1.5°C, ∆T water(3): -0.8°C
∆T metal(1): 77.5°C, ∆T metal(2): 80.5°C, ∆T metal(3): 80.2°C.
ft= (m1 cp1 t1 + m2 cp2 t2 + .... + mn cpn tn) / (m1 cp1 + m2 cp2 + .... + mn cpn) (1)
where,
1000g = 1kg
ft(t eg)= final mixed temperature (°C)
m = mass of substance (kg)
cp = specific heat of substance (J/kg°C)
t = temperature of substance (°C)
What is a graph?
A graph is a _______________________ representation of the relationship between two quantities.
_______________________ variable (manipulated)
Controlled by experimenter
_______________________________ variable (responding)
Something we observe as the result of the experiment
*Visual
*Independent
*Dependent
Select the correct answer
Which statement best supports the idea that water conservation is important for human societies?
OA Once humans use water, it cannot be reused ever again,
OB. Only about 1% of the freshwater on Earth is easily accessible.
OC Water is constantly being lost from the hydrosphere
OD. Most land animals use salt water instead of freshwater.
Answer:
Only about 1% of the freshwater on Earth is easily accessible.
Explanation:
Freshwater accounts for a minimal proportion of water resources on planet earth. About 70 percent of the world surface area is covered by water, but only about 2.5 percent of this mass of water is fresh. The remaining are marine or salt water. Amazingly, just about 1 percent of this freshwater is easily accessible. The other 1.5% is trapped in glaciers and snowfields.
This underscore the need for water conservation on the planet since fresh water is a scarce resource and people living in many areas have no access to fresh water.
How many d electrons does I (atomic number
53) possess?
1. 10
2. 5
3. 8
4. 0
5. 20
6. 53
7. 16
Answer:
6. 53 is the answer. Hope this helps:)
The number of d electrons that an atom of atomic number 53 possess are 20. Thus, the correct option for this question is 5.
What is an Atomic number?An atomic number may be defined as the number of protons in the nucleus of an atom that significantly represents the characteristic of a chemical element and determines its specific place in the modern periodic table.
According to the modern periodic table, an element that has an atomic number of 53 is known as Iodine. Its electronic configuration is [tex]1s^2, 2s^2, 2p^6, 3s^2, 3p^6, 4s^2, 3d^1^0, 4p^6, 5s^2, 4d^1^0, 5p^5[/tex]. Thus, according to this electronic configuration, the total number of d electrons are [tex]3d^1^0 and 4d^1^0[/tex].
Therefore, the number of d electrons that an atom of atomic number 53 possess are 20. Thus, the correct option for this question is 5.
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Which is a characteristic of the part of the atom marked
"A"?
It contains most of the mass.
It is negatively charged
It is mostly empty space.
It is composed of electrons.
Answer:
It contains most of the mass
Explanation:
that part A rigth
Answer:
A
Explanation:
What is the relationship between variable x and variable y?
As variable x increases, variable y increases.
As variable x increases, variable y decreases.
Both variables show a trend toward decreasing values.
No distinct relationship exists between variables x and y.
Answer:
So x is usually called the independent or explanatory variable, and y the dependent or response variable. Another way to think about it, sometimes, is that x is used to predict y. So x is something that comes before y in time. That is why, for example, height at age 2 is on the x axis and height at age 18 on the y
Explanation:
hope this helpss
x is independant and y in dependant .
name the gas evolved when metal carbonates react with acid and state the method
Answer:
the gas evolved is carbon dioxide
Explanation:
for example we can have a look at sodium carbonate reaction with hydrochloric acid
when sodium carbonate reacts with hydrochloric acid, it results in sodium chloride, carbon dioxide and water.
Answer: Carbon dioxide
In the apple activity you completed which of the following is an example of a constant
Answer: the type of apple because it is an example of a constant
Explanation:
• True False estion 2 (1 point) Water and ice are made from the same molecule H2O True False
Answer:
true i think
Explanation:
The chemical combination of two or more different atoms in fixed amounts is called a(n)
A. element
B. mixture.
C. orbit
D. compound.
Answer:
D. compound
Explanation:
Answer:
compound
Explanation:
study island
Samantha was not feeling well. She had a fever and felt nauseous. Her mother took Samantha to the doctor who prescribed an antibiotic. What kind of infectious agent did Samantha have?
A.bacterial
B.fungal
C.parasitic
D.viral
Answer:
A
Explanation:
A 55kg skier accelerated at 3 m/s^2. How much force must the skier exert?
Answer:
The answer is 165 NExplanation:
The force acting on an object given it's mass and acceleration can be found by using the formula
force = mass × accelerationFrom the question
mass = 55 kg
acceleration = 3 m/s²
We have
force = 55 × 3
We have the final answer as
165 NHope this helps you
Identify the law that explains the following observation:
Nitrogen Dioxide can be formed by reacting 14 grams of
nitrogen with 32 grams of oxygen.
Answer:
Proust's law of definite proportion
Explanation:
The law of constant proportion states that the components elements of a given chemical compound combine with each other in a fixed mass ratio when the compound is produced by any given process
Therefore, from the question, the chemical formula for Nitrogen Dioxide is NO₂, where the molar mass of nitrogen, N = 14
The molar mass of oxygen, O = 16
Given that one molecule of NO₂, contains one atom of nitrogen and two atoms of oxygen, one mole of NO₂ will contain 14 grams of nitrogen and 32 grams of oxygen, according to Proust's law of definite proportion.
With radiocarbon dating, scientists compare an object's carbon-14 levels with _____. the carbon-14 levels of an object from the same time period carbon-14 levels in the atmosphere the carbon-14 levels in the rock surrounding the object the object's carbon-12 levels
Answer:carbon-14 levels in the atmosphere
Explanation:
When carrying out radiocarbon dating, the level of carbon-14 in a sample is compared with the level of carbon 14 in the atmosphere because, objects exchange carbon-14 with the atmosphere.
Comparison of the activities of carbon-14 in the atmosphere and in the sample gives the age of the sample since the half-life of carbon-14 is a constant.
pls help ill mark you as brainliest
Answer:
Explanation:
Synthesis- D
Combustion- C
Decomposition- A
Single Displacement- C
Double Displacement- B
which balances the equation Mg + O2 → MgO
Answer:
2Mg+[tex]O_{2}[/tex]→2MgO
Explanation:
The first step is magnesium + oxygen equals magnesium oxide
The second step is changing that into an equation which looks like Mg+[tex]O_{2}[/tex]→MgO
The third step is to 2*Mg and 2*O as well as the product has to be 2*Mg,2*O which gets the equation to become balanced as 2Mg+[tex]O_{2}[/tex]→2MgO
The coefficient 2 balance the given reaction. The balanced equation for the given reaction is given as [tex]\rm Mg + O_2 \rightarrow 2MgO[/tex].
A balanced equation is a mathematical representation of a chemical reaction that respects the law of mass conservation. It depicts the reactants and products of the reaction, as well as the relative amounts of each species. The unbalanced equation is [tex]\rm Mg + O_2 \rightarrow MgO[/tex]. One magnesium (Mg) atom on the left side and one on the right side, so the magnesium is already balanced. Balance the oxygen (O) atoms. On the left side, there are two oxygen (O) atoms present in the O2 molecule. On the right side, there is only one oxygen (O) atom in the MgO molecule. To balance the oxygen atoms, we need to add a coefficient of 2 in front of MgO: [tex]\rm Mg + O_2 \rightarrow 2MgO[/tex]. The balanced equation is [tex]\rm Mg + O_2 \rightarrow 2MgO[/tex].
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12. A malleable sheet of metal used to wrap food in the kitchen is made of only aluminum. What can be said about the metal sheet?
Answer:
is aluminium prepared in thin metal leaves with a thickness less than 0.2 mm (7.9 mils); thinner gauges down to 6 micrometres (0.24 mils) are also commonly used.[1] In the United States, foils are commonly measured in thousandths of an inch or mils. Standard household foil is typically 0.016 mm (0.63 mils) thick, and heavy duty household foil is typically 0.024 mm (0.94 mils). The foil is pliable, and can be readily bent or wrapped around objects. Thin foils are fragile and are sometimes laminated with other materials such as plastics or paper to make them stronger and more useful. Aluminium foil supplanted tin foil in the mid 20th century.
Help me answer the question please I don’t get it this is earth science not chemistry.
See a similar question to this one answered here:
https://brainly.in/question/4914083
If you weighed 25 grams of NaOH in this lab, how many moles of NaOH
would you have?
Why are metals malleable?
a
They are shiny.
b
The electrons are delocalized and able to move between the atoms.
c
The electrons are held tightly within the lattice structure making it strong.
d
The electrons are shared between two metal ions and this holds the atoms together.
Answer:
b is the anwer
Explanation:
the option is the explanation
Someone drops a book on the floor, and it makes a loud noise. At that time, you turn to look at the person who dropped the book. The loud noise is an example of a…
A. Hydrotropism
B. Stimulus
C. Response
D. Phototropism
Answer: Stimulus
Explanation: The definition of Stimulus is "a thing or event that evokes a specific functional reaction in an organ or tissue," according to the Oxford Dictionary. So the book dropping and causing a noise is an example of a stimulus.
how do i know if they are congruent
