Answer:
displacement is how far away she is from her starting point. distance includes every time she turned in a different direction, but displacement is just a straight line from her starting point to her ending point.
Explanation:
:)
how many molecules of co2 are there in 4.56 moles of co2?
Answer:
The answer is 2.75 × 10²⁴ moleculesExplanation:
The number of molecules of CO2 can be found by using the formula
N = n × Lwhere n is the number of moles
N is the number of entities
L is the Avogadro's constant which is
6.02 × 10²³ entities
From the question we have
N = 4.56 × 6.02 × 10²³
We have the final answer as
2.75 × 10²⁴ moleculesHope this helps you
Assume that a person pouncing a ball represents a closed system. Which
statement best describes how the amounts of the ball's potential and kinetic
energy change?
A. Both the kinetic and potential energy of the ball increase.
B. The ball's kinetic energy increases as it falls and its potential
energy decreases.
C. Both the kinetic and potential energy of the ball decrease.
D. The ball's potential energy decreases as it rises and its kinetic
energy increases.
Answer:
A b9th the kintectic and potentilal energy change
Answer:
B. The ball's kinetic energy increases as it falls and its potential
energy decreases.
Explanation:
Which of the following is the correct model of C6H14?
Answer:
This question is incomplete
Explanation:
This question is incomplete because of the absence of options. However, the compound C₆H₁₄ is hexane. Hexane is a member of saturated hydrocarbons (homologous series) called alkanes (with the general formula CₙH₂ₙ₊₂). The structure for an hexane is shown below
H H H H H H
I I I I I I
H - C - C - C - C - C - C - H
I I I I I I
H H H H H H
which can also be written as
CH₃CH₂CH₂CH₂CH₂CH₃
Answer:
This is the picture to go with it.
Explanation:
If your cannot keep your balance, what bodily structure might be responsible?
A. Ossicles
B. Semicircular canal
C. Hippocampus
D. Occipital lobe
Answer:
d
Explanation:
just seven please really need your help right now
Answer:
No
Explanation:
Because each planet has a different gravitational pull
I need help this is 7th grade science
Answer:
i need to know the question then i can help :)
Explanation:
What is the value of 100 ºC on the Kelvin scale? A. 100 K B. 273 K C. 373 K D. -373 K E. -300 K
Answer:
373.15 K
Explanation:
Given data:
Temperature in degree Celsius = 100°C
Temperature in kelvin scale = ?
Solution:
To convert the degree Celsius into kelvin scale we add the given degree Celsius into 273.15.
100°C +273.15 = 373.15 K
Answer:
C. 373K
Explanation:
This is a widely used nonrenewable resource that is formed over millions of years. A wood B water C oil D sand
Answer: C. oil
Explanation:
Balance the following equation:
K+ H2O + H2 + KOH
Answer:
2K + 2H2O → H2 + 2KOH
Explanation:
Find how many atoms you have on both sides then add 2 to both sides.
Reactant: Products:
K: 1+1=2 K: 1+1=2
H: 2+2=4 H: 3+1=4
O: 1+1=2 O: 1+1=2
Therefore it is balanced. Hope this helps
Selah is making a mobile of an atom of beryllium to hang from the ceiling in her science class. She uses a clear plastic bag for the nucleus and fills it with white foam balls for protons and black foam balls for neutrons. She suspends blue foam balls from strings around the nucleus to represent the electrons. Which diagram shows Selah's model?
Answer:
See explanation
Explanation:
The question is incomplete because the images of the models are absent. However, i will try to give you a general description of what the correct answer should be.
Beryllium is a member of group 2 in the periodic table. Beryllium has an atomic number of 4. This implies that it has four protons in its nucleus and four electrons in its shells. In a neutral atom, the number of electrons on the shells is equal to the number of protons in the nucleus.
The electronic configuration of Beryllium is 1s2 2s2. This implies that it should have two shells each containing only two electrons each.
Since we are using white foam balls for protons and black foam balls for neutrons, the clear plastic will contain four white foam balls and five black foam balls since the mass number of beryllium is 9 and number of neutrons = mass number - number of protons.
Four blue foam balls hanging from strings will represent the electrons around the nucleus.
Any model that corresponds to the description above is the correct answer.
Answer:
my answer isnt any better than hers
Explanation:
I really need help with this ASAP
Answer:
1) Reaction rate, in chemistry, the speed at which a chemical reaction proceeds. It is often expressed in terms of either the concentration (amount per unit volume) of a product that is formed in a unit of time or the concentration of a reactant that is consumed in a unit of time.
2) By collecting the hydrogen gas that is produced over water or in a syringe, rate graphs can be produced. The volume of gas produced and the time taken need to be recorded. The rate of the same reaction could be monitored by measuring the change in the mass of reactants as they react to form products.
A student with a body temperature of 37°C holds a piece of ice that has a temperature of –8°C.
Which statement best explains what happens?
A.Heat transfers coldness from the ice to the student's hand. B.Heat transfers thermal energy from the student's hand to the ice. C.Thermal energy transfers heat from the student's hand to the ice. D.Thermal energy transfers coldness from the student's hand to the ice.
plzz hurry
Answer:
B
Explanation:
Heat moves as thermal energy from hot body to a cold body
don't forget to rate answer
terry usually rides his bike at 15 mph. if his riding speed is reduced by 3 mph,
Answer: 12
Explanation: gaming
HELP ME PLS!! I FORGOT TO STUDY Which may result from an increase in friction?
decreased traction
increased speed
reduced wear and tear
generation of heat
Answer: Generation of heat
Explanation: 1, 2 and 3 are wrong because traction actually increases, speed decreases and wear and tear is produced.
Hope this helps you, love!
Answer:
A, C, and D
Explanation:
Which of the following is a compound? H2 Ne CO2 O2
Answer:
CO2
Explanation:
Which of the following best illustrates the law of corkervation of energy?
A
The work done stretching a spring is transformed into stored energy in the spring
B
Leak-proof batteries are able to store chemical energy for long periods of time.
С
Ajogger conserves her energy by reducing the rate at which she jogs.
D
Ice water changes into liquid water when it absorbs heat energy.
Answer:
A . The work done stretching a spring is transformed into stored energy in the spring
Explanation:
The work done stretching a spring is transformed into stored energy in the spring is clear indication of the law of conservation of energy.
The law of conservation of energy states that "energy is neither created nor destroyed but transformed from one form to another".
In this problem, mechanical energy is used to stretch the spring. The mechanical energy is converted to stored potential energy.This is an energy transformation process.
what type of element is gold?
Answer:
Transition metal
Explanation:
Where is it located?
-Gold is a transition metal meaning it is located in the center block of the periodic table
Where is it located?
-Gold is in group 11, period 6
How is it abbreviated?
-Gold is abbreviated commonly as Au.
Answer:
Transitional metal is the answer.
Explanation:
Gold is also a pure substance btw but the element is Transitional metal.
Hope this helps :D
When matter changes a liquid is it a physical change
Answer:
Yes.
Any physical change is reversible.
help me plz...........
Answer:
try use Google search
Explanation:
you need to use it
How do I balance this science equation?
If a crystal lattice structure is so hard, what causes most ionic compounds to be brittle?
A. Applying force, such as striking the crystal with a hammer, can release protons, causing ions of similar charges to align, repel each other, and dissolve the crystal.
B. Applying force, such as striking the crystal with a hammer, can release electrons, causing ions to alter their charges, repel each other, and dissolve the crystal.
C. Applying force, such as striking the crystal with a hammer, can shift one layer of ions, causing ions of different charges to align, repel each other, and fragment the crystal.
D. Applying force, such as striking the crystal with a hammer, can shift ions, causing ions of similar charges to align, repel each other, and fragment the crystal.
Explanation:
The cations and anions are locked tightly into place because of the attraction of their opposite charges - as a result, it's difficult to move the ions and the material is very hard.
Answer:
d
Explanation:
https://chemistry.stackexchange.com/questions/33322/why-are-so-many-ionic-compounds-brittle
A substance is considered more efficient at storing energy when its specific heat enables it to resist changes in temperature. So, a more efficient substance will stay hotter, or cooler, for longer. Which substance—air or water—stores energy more efficiently under equal conditions?
Answer:
Water stores energy more efficiently than air.
Explanation:
Answer:
Water stores energy more efficiently than air.
Explanation:
Edmentum's sample answer
All energy originates from the _________.
A. sun
B. mitochondria
C. biomass
D. chloroplast
Answer:
The sun.
Explanation:
:)) :) :):)) :)
Answer:
A
Explanation:
All energy originates from the sun.
which element of the lanthanides series has the largest atomic radius
Answer:
Lathanum
Explanation:
The number of Oxygen atoms in both of glucose and fructose is 6 atoms, which means 12 in total ,but the sucrose is 11 atoms of Oxygen although it's composed of fructose and glucose, the question where the atom number 12 go ?
Answer:
The atom number 12 of oxygen contributes to the formation of water (H2O) during the process of forming sucrose.
Explanation:
Sucrose is a dissacharide carbohydrate i.e it contains two simple sugars or saccharides. The two simple sugar monomeric components of sucrose are glucose and fructose. As rightly stated in this question, the number of Oxygen atoms in both of glucose and fructose is 6 atoms respectively, which means 12 in total, however, the sucrose molecule has 11 atoms of oxygen meaning 1 oxygen atom is missing.
Sucrose is formed from glucose and fructose by a process called DEHYDRATION REACTION. A dehydration reaction means that one MOLECULE OF WATER IS LOST in order to form a glycosidic linkage/bond that joins fructose and glucose monomeric sugars together in the sucrose molecule. Two hydrogen atoms and ONE OXYGEN atom from the supposed 12 is used to form the WATER MOLECULE.
Question 2 (1 point) The chemical formula for an ionic compound represents the a b number of ions in each molecule. total number of ions in the crystal lattice. number of atoms in each molecule simplest ratio of ions that results in an electrically neutral compound.
The chemical formula for an ionic compound represents the simplest ratio of ions that results in an electrically neutral compound. That is option D.
What is an ionic chemical compound?An ionic chemical compound is defined as the type of chemical compound that contains both the oppositely-charged ions of a metal and a nonmetal are attracted reacting with each other to form an ionic bond.
When represented as a chemical formula, it is the simplest ratio of ions that results in an electrically neutral compound.
Learn more about ionic compound here:
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1.)A photon has a wavelength of 1.95 x10^-11 m. What is the frequency?
a.)Using your answer, find the energy of that photon
Explanation:
Given parameters:
Wavelength of photon = 1.95 x 10⁻¹¹m
Unknown:
Frequency of the wave = ?
Energy of the photon = ?
Solution:
The frequency and wavelength of a wave are related by the expression;
C = Fλ
C = speed of light = 3 x 10⁸m/s
F = frequency
λ = wavelength
Insert the parameters and solve;
3 x 10⁸ = F x 1.95 x 10⁻¹¹
F = [tex]\frac{3 x 10^{8} }{1.95 x 10^{-11} }[/tex] = 1.54 x 10¹⁹Hz
Energy of the photon is related to frequency using the expression below;
E = hF
h is the Planck's constant = 6.634 x 10⁻³⁴m²kg/s
Insert the parameters and solve;
E = 6.634 x 10⁻³⁴ x 1.54 x 10¹⁹ = 1.02 x 10⁻¹⁴J
Which of the following is least likely to change the gene pool of a population of chipmunks?
A pesticide poisons and kills a large number of chipmunks.
A group of chipmunks moves to a new habitat.
A number of chipmunks die due to old age.
A genetic mutation causes some of the chipmunks to have larger eyes.
Answer:
I would say that old age because nothing is affecting the gene pool by dying of old age.
Explanation:
Hope this helps.
Among the following, one which is least likely to change the gene pool of a population of chipmunks is "A number of chipmunks die due to old age".
What is gene pool?Reference to the combination of all the genes (including alleles) present in a reproducing population or species is called as a gene pool.
Evolution can change the composition of a population's gene pool over time. This can occur by a variety of mechanisms, including mutations, natural selection, and genetic drift. The result is a gene pool that is altered to be attuned to the needs of the population's specific environment.
Given options are-
A pesticide poisons and kills a large number of chipmunks.
A group of chipmunks moves to a new habitat.
A number of chipmunks die due to old age.
A genetic mutation causes some of the chipmunks to have larger eyes.
Therefore, Among the following, one which is least likely to change the gene pool of a population of chipmunks is "A number of chipmunks die due to old age".
To learn more about evolution click:
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Help meee, if u help me i give u a pizza :)
Ben has two gold color nuggets that look identical. However, the density of the first nugget is 4.2 g/mL and the second is 19.3 g/mL.
Are the nuggets made out of the same substance?
