Answer:
The answer is B
The motion of the shopping cart will change when the forces acting on the shopping cart are unbalanced. Option B is correct.
According to Newton's first law of motion, an object will remain in its state of motion (either at rest or moving with a constant velocity) unless acted upon by an external force. In this case, the shopping cart is initially at rest or moving with a constant velocity due to the balanced forces exerted by the two people pushing it from opposite sides.
If the two forces applied by the people pushing the cart are equal the cart will continue to move in the same direction with the same velocity. The forces cancel each other out, resulting in a balanced force situation, and there is no change in motion.
However, if the forces applied by the two people pushing the cart are unequal, the forces are unbalanced. This will result in a net force acting on the shopping cart, causing an acceleration and a change in its motion. The cart will either start moving if it was initially at rest or change its speed and/or direction if it was already in motion.
When both people stop applying a force is incorrect because, the cart's motion will continue unchanged if it was already moving with constant velocity due to the absence of any unbalanced forces.
Hence, B. is the correct option.
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a letter stating three things that need urgent fixing in your school
Answer and Explanation:
Computers ( The computers are very old and very slow, and we have to notice that almost everyone are using computers at the same time at the school, which makes it even harder for it to load up assignments. )The Rick Rolling ( Everyone keeps sending links to teachers and students saying that it is part of some assignment but then you have to listen to Rick Astley, they should really block these links. )The lockers ( The lockers are also very old and they are breaking down and rusting a lot from the moisture in the hallways. One of the lockers even broke down today!!! I hope they can fix this so no one else gets hit with a locker door. )Hope this helps! ;)
What is the percent composition of the element hydrogen in the compound methane CH4
Answer:
The answer is 25.14 percent. Hope this helps.
help please you’ll get 18 points to answer this correctly
Gregor Mendel was a botanist, teacher
and monk. He was born in Austria. He
came up with the laws of Mendelian
inheritance in 1865. The laws explain
the principles of heredity.
Heredity
explains how offspring inherit traits
from parents. He figured out his laws
from studying pea plants. It turned out
those laws work for all living things.
They even work for people!
Which question is answered in this paragraph?
Answer:
C
Explanation:
It says he came up with the theory of heredity in the second paragraph, second sentence when it talks about his experiments with the pea plants.
What would be the mass of 3 moles of water molecules?
a
54 grams
b 40 grams
C
30 grams
d 20 grams
Answer:
[tex]\boxed {\boxed {\sf A. \ 54 \ grams }}[/tex]
Explanation:
To convert from moles to grams, we must use the molar mass.
Recall that water's molecular formula is H₂O. It contains hydrogen and oxygen. Look up the two elements masses on the Periodic Table.
Hydrogen (H): 1.008 g/mol Oxygen (O): 15.999 g/molNow, use these masses to find water's mass. The subscript of 2 tells us there are 2 atoms of hydrogen, so we multiply hydrogen's mass by 2 and add oxygen's.
H₂O= 2(1.008 g/mol) + 15.999 g/mol = 18.015 g/molUse the molar mass as a ratio.
[tex]\frac{18.015 \ g \ H_2 O}{ 1 \ mol \ H_2 O}[/tex]
Multiply by the given number of moles.
[tex]3 \ mol \ H_2O*\frac{18.015 \ g \ H_2 O}{ 1 \ mol \ H_2 O}[/tex]
The moles of water will cancel.
[tex]3 *\frac{18.015 \ g \ H_2 O}{ 1 }[/tex]
[tex]3 *{18.015 \ g \ H_2 O}[/tex]
[tex]54.045 \ g \ H_2O[/tex]
Round to the nearest whole number. The 0 in the tenth place tells us to leave the number as is.
[tex]54 \ g \ H_2O[/tex]
There are about 54 grams of water in 3 moles.
Answer:
54 grams
Explanation:
First step is to find what one mole of water is in grams.
Water is H2O so that means we have two moles of Hydrogen.
H - 2 grams (on periodic table)
We have one mole of Oxygen.
O - 16 grams (on periodic table)
Add 2 and 16 to get 18 total grams in one molecule of H2O
Now multiply 3 times 18 to know how many grams in 3 moles of H2O
You end with
3x18=54 grams
A regional metamorphic belt is divided into zones based upon
Write Lewis dot structures for each of the following molecules. Use VSEPR to determine the shape of each molecule. Use electronegativity values to determine the polarity of each molecule.
PH3
CHCl3
H2CO
XeCl4
PBr5
TeF4
ICl5
BF3
KrF2
SO3
my question is butterfly emerges
PLEASEEEE HELP I WILL GIVE 30 POINTS Cobalt
Calcium
Platinum
Phosphorus
Part II:
Look at a periodic table, and in the space below type the missing chemical or symbol. Then answer the question below.
Iron:
Co:
Na:
Tin:
P:
F:
Fe:
Magnesium:
Uranium:
Ca:
Carbon:
Lead:
Ag:
Zn:
Ni:
Part III:
You have found a new element with the atomic mass of 119. In a paragraph explain where you would put in on the periodic table and why you would put it there. What type of properties would this element have? What would you call it?
Answer:
Iron: Fe
Co: Cobalt
Na: Sodium
Tin: Sn
P: Phosphorus
F: Flourine
Fe: Iron
Magnesium: Mg
Uranium: U
Ca: Calcium
Carbon: C
Lead: Pb
Ag: Silver
Zn: Zinc
Ni: Nickle
----------------
There is honestly no right answer for this but here is what I would put:
Atomic mass increases as you go from left to right. If you look at the periodic table, it would be between Sn and Sb. It would bet here because Sn is 118 and Sb is 121. Basing it off of Antimony and putting it in group 15, the properties are that it is metallic and is a poor conductor of heat. I would call it Stin, which would be shortened to St.
IM GIVING BRAINLIST HELP Deep, cold water is the __________. Warm, shallow water is the ___________.
Question 3 options:
least dense; densest
densest; least dense
densest; densest
least dense; least dense
In an ecosystem, deep, cold water is the densest while warm, shallow water is the least dense.
What is an ecosystem?An ecosystem is defined as a system which consists of all living organisms and the physical components with which the living beings interact. The abiotic and biotic components are linked to each other through nutrient cycles and flow of energy.
Energy enters the ecosystem through the process of photosynthesis .Animals play an important role in transfer of energy as they feed on each other.As a result of this transfer of matter and energy takes place through the system .Living organisms also influence the quantity of biomass present.By decomposition of dead plants and animals by microbes nutrients are released back in to the soil.
Learn more about ecosystem,here:
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Will the energy released in the synthesis of water equal the energy absorbed in the decomposition of water?
Answer:
yes
Explanation:
the energy released in the synthesis of water is equal to the energy absorbed in the decomposition of water. This outcome happens because the difference in energy between the reactants and the products in both cases is equal. . It follows the law of conservation of energy.
What is the mass of 14.4 moles Fluorine?
0.379g
274.8
1.32 g
2.64g
547 g
Answer:
D
Explanation: d
Answer:
547g
Hope i could help ;)
30 POINTS PLEASE TELL ME HOW TO SOLVE THIS!!
If you have 3.4grams of carbon how many
moles of carbon would you have?
Answer:
3 moles of carbon atoms is equivalent to 36 gm carbon.
In 12gm carbon there are 6.023*10^23 atoms.
So in 36 gm there are 3*6.023*10^23 atoms.
so the answer is 18.069*10^23 atoms.
Explanation:
Explanation:
moles = mass in gm/ molar mass =3.4/12= 17/60
plz mark my answer as brainlist plzzzz.
hope this will be helpful to you ☺️.
Which statement below best describes the difference between an orbit and an orbital?
a. An orbit is a fixed path around the nucleus where an electron must be found; an orbital is a probability region where an electron is likely (but
not necessarily) going to be found
b. An orbit and an orbital are the same thing
c. An orbital is a fixed path around the nucleus where an electron must be found; an orbit is a probability region where an electron is likely (but
not necessarily) going to be found
Answer:
An orbit is a fixed path around the nucleus where an electron must be found; an orbital is a probability region where an electron is likely (but
not necessarily) going to be found
Explanation:
Orbits are fixed elliptical paths where an electron must be found. The idea of orbits was introduced in the Bohr model of the atom. Electrons were shown to occupy fixed orbitals of quantized energy.
Orbital is an idea introduced by quantum mechanics. It refers to a region in space where an electron may be found. The wave mechanical approach does not view the electron as being found in a fixed orbital but rather defines a region in space around the nucleus where there is a high probability of finding the electron.
how many moles are equivalent to 4.151 x 10^25 particles of lithium?
Answer:
68.95moles
Explanation:
Given parameters:
Number of particles of lithium = 4.151 x 10²⁵ particles
Unknown:
Number of moles = ?
Solution:
From the mole concepts, we know that;
6.02 x 10²³ particles are contained in 1 mole of a substance
4.151 x 10²⁵ particles contains [tex]\frac{4.151 x 10^{25} }{6.02 x 10^{23} }[/tex] = 68.95moles
Is my answer correct?? Please correct me
Thank you!
Answer:
you are right
Explanation:
Which of the following atoms has the largest atomic radius and explain why: potassium, gallium, or germanium.
Answer:
Potassium
Explanation:
The atom with the largest atomic radius is potassium from the given list.
The atomic radius is taken as half of the inter-nuclear distance between two covalently bonded atoms of non-metallic elements or half of the distance between nuclei in the solid metal state.
Across a period in the periodic table, atomic radii decreases progressively from left to right.
This is due to the progressive increase in the nuclear charge without an attendant increase in the number of electronic shells.
Answer:
Potassium
Explanation:
An atom's size is defined by the distance from the nucleus to the valence (outer) shell of electrons. Although difficult to to actually measure, due to electrons existing in a probability field with no defined boundaries, it is common knowledge that the more valence shells of an atom, the larger the atom.
Knowing this, lets look at the electron configuration of the elements mentioned:Oxygen = 2,6Sodium = 2,8,1Magnesium = 2,8,2Potassium = 2,8,8,2As we can see, only Potassium has four electron shells, therefore Potassium has the largest atomic size.Alternatively, one can look at a Van der Waal radii table to find that the radii of the four elements are (in picometres):Oxygen = 152 pmSodium = 227 pmMagnesium = 173 pm
Showing once again how Potassium has the largest atomic radius, and therefore the largest atomic size. Interestingly enough, Sodium has a larger atomic radius then magnesium, despite having less electrons and protons.
You are cooking dinner using a metal pan. When you pick up the pan,the handle burns your hand. Which form of thermal energry transfer causes you to burn your hand?
a conduction
b convection
c radiation
Answer:
Conduction
Explanation:
Answer: The answer would be A conduction
How many moles of Na2SO4 are present in 426.12 grams of Na2SO4? (5 points)
Group of answer choices
2
3
5
6
Answer: It’s 2.9 moles
Explanation:
Answer:
b) 3
Explanation:
i got it right
how many newton’s to lift a 25kg weight
Answer:
245.18 newtons
Explanation:
245.18 newtons
An i just want the points
thank you
Explanation:
what best describes what forms in nuclear fission?
a. Two smaller, more stable nuclei
b. two larger, less stable nuclei
c. one smaller, less stable nucleus
d. one larger, more stable nucleus
Answer:
a. Two smaller, more stable nuclei
Explanation:
Answer:
a
Explanation:
took the quiz
Can you help me please?
Answer:
A. the light subatomic.... is correct answer
Pls help!!!
Briefly describe how plasma TVs display colour.
PLEASE HELPP! EXPLAIN UR ANSWER AND ILL GIVE BRAINLIEST
Answer:
false it removes carbon dioxide ......The heart pumps blood to all parts of the body. Blood provides oxygen and nutrients to the body and removes carbon dioxide and wastes. As blood travels through the body, oxygen is used up,
Explanation:
Oxygenated blood travels from the lungs through the pulmonary veins and into the left side of the heart, which pumps the blood to the rest of the body (see Function of the Heart). ... Then the blood is pumped through the pulmonary artery to the lungs, where it picks up oxygen and releases carbon dioxide.
Answer:
true because your heart contains blood that flows through you body system
What is the correct formula for the ionic compound chromium (III) nitride?
Describe the difference between ionization energy and electron affinity in terms of atomic structure.
Answer:
Please refer below to the attached file
Hope it helps
Please mark me as the brainliest
Thank you
Which of the following statements describes a concentrated solution?
a) contains more solvent
b) contains more solute per volume
c) contains a solute only
d) appears to contain two layers
How many elements does 2H2O2 have?
Answer:
If the 2nd and third 2 are underscored then there are two hydrogen atoms and 1 oxygen atom
Explanation:
2) If you
move 50 meters in 10 seconds, what is your velocity?
Answer:
5 meter/second.
Explanation:
You dived the seconds, 10, by the meters, 50.
What is the answer for this question?
What happens at a constant temperature, as time progresses?
Answers -
1.Phase change
2.Bonding of particles
3.Separation of particles
4.The substance remains in its initial phase
