Answer:
Anaesthesia & Intensive Care Medicine
Volume 6, Issue 9, 1 September 2005, Page 294
Force, mass and acceleration
Author links open overlay panelPhilDalrympleaRichardGriffithsb
https://doi.org/10.1383/anes.2005.6.9.294
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Abstract
Force, mass and acceleration are everyday words but often used inaccurately. Force is a physical influence, which when applied to an object causes it to accelerate in the direction from which it was applied. Mass is the amount of matter in an object and is expressed in kilograms. Acceleration is the rate of change of velocity of an object in the same straight line of the unbalanced force. When forces become balanced, there is no net force and therefore no movement. Newton’s second law links these three terms and concerns the effect that an unbalanced force has on the motion of an object. It states that the rate of change of velocity of an object is directly proportional to the force applied and takes place in the direction of the force. It is summarized by the equation: Force (N) = mass (kg) × acceleration (m/s2). Thus, an object of constant mass accelerates in proportion to the force applied. Gravity is the variable force of attraction between any two objects. All matter possesses gravitational ‘pull’ towards other matter. The amount of gravity between two objects is dependent on their mass and the distance between their centres. The word ‘weight’ in its proper context refers to the downward vertical force exerted on an object as a result of the earth’s gravity. An object with greater mass is therefore subjected to a greater gravitational force (i.e. it has greater weight).
6. Which type of force(s) will cause a change in an object's motion? *
A) Balanced Forces
O B) Unbalanced Forces
Unbalanced forces cause a change in motion, speed, and/or direction. When two forces act in the same direction on an object, the net force is equal to the sum of the two forces.
Answer:
B.Unbalanced .............
Definition surface water
Answer:
Surface Water - water that collects on the surface of the ground. Hope it helped!
Answer: surface water is when water is located of top of the Earth for example rivers, creeks, and wetlands.
Write the full electron configuration of calcium.
152 2s22p6 352 4s2
Use the electron configuration to predict the most likely oxidation state of calcium?
(Explain your answer please)
Answer: [tex]1s^22s^22p^63s^23p^64s^2[/tex] , oxidation state = +2
Explanation:
Electronic configuration represents the total number of electrons that a neutral element contains. We add all the superscripts to know the number of electrons in an atom. The electrons are filled according to Afbau's rule in order of increasing energies.
The electronic configuartion of Calcium with atomic number 20 is :
[tex]Ca:20:1s^22s^22p^63s^23p^64s^2[/tex]
As calcium can easily lose its two valence electrons to attain stability , its oxidation state is +2.
[tex]Ca^{2+}:18:1s^22s^22p^63s^23p^6[/tex]
A gas has 1.2 L of volume, 1.8 atm of pressure and 264 K temperature. If both the
volume was doubled but the pressure was halved, what would the new
temperature be?
Your answer
Temperature does not change, remains 264 K
Further explanationGiven
V₁= 1.2 L
P₁ = 1.8 atm
T₁ = 264
Required
The new temperature
Solution
The volume was doubled = 2V₁ = 2 x 1.2 = 2.4 L(V2)
The pressure was halved = 0.5P₁ = 0.5 x 1.8 = 0.9 atm(P2)
Combined gas law :
P₁V₁/T₁=P₂V₂/T₂
Input the value :
[tex]\tt \dfrac{1.8\times 1.2}{264}=\dfrac{0.9\times 2.4}{T_2}\\\\T_2=264[/tex]
Ilsa showed her parents a trick she learned in science class. She used water to make ice cubes. Ilsa then placed some ice cubes in a glass containing a clear liquid. The ice cubes floated. She then placed some ice cubes in another glass that also contained a clear liquid. In this glass, the ice cubes sank to the bottom of the glass. Ilsa did not tell her parents that the first glass contained water while the second glass contained rubbing alcohol. What can you conclude from this information?
A.
The ice cubes changed their density.
B.
Water has the same density as alcohol.
C.
Water has a greater density than alcohol.
D.
Alcohol has a greater density than the ice cubes.
Answer:
C. Water has a greater density than alcohol.
Explanation:
From the experiment, it can be shown that water has a greater density than the alcohol.
The ice cube is able to float in the water because, the density of the ice is less than the density of the water.
Density of ice < Density of water
So, the ice cube sinks in alcohol because the density of the ice cube is greater than the density of the alcohol.
Density of ice > Density of alcohol
Therefore, we can assume that since the density of ice is greater than density of alcohol, then the density of water is greater than that of the alcohol.
During combustion what type of chemical reaction takes place
Convert this temperature from °F to °C. Explain how pls?
-2.2 C
10.6°C
2.2°C
33.3°C
Answer:
Start with the temperature in Fahrenheit (e.g., 100 degrees).
Subtract 30 from this figure (e.g., 100 - 30 = 70).
Divide your answer by 2 (e.g., 70 / 2 = 35).
Potassium permanganate (KMnO2) is used as an explosive agent. How
many moles are there if we have 105.66 grams of potassium
permanganate?
Answer:
0.67mole
Explanation:
Given parameters:
Mass of potassium permanganate = 105.66g
Unknown:
Number of moles = ?
Solution:
To find the number of moles of the given compound;
Number of moles = [tex]\frac{mass}{molar mass}[/tex]
Molar mass of KMnO₄ = 39 + 55 + 4(16) = 158g/mol
Number of moles = [tex]\frac{105.66}{158}[/tex] = 0.67mole
Someone help plzzzz just need final answers I’ll mark Brainly
Answer:
Omodium
Explanation:
It’s Umodium
Why does the sun seem to change position in the sky?
The first major contributor to the Sun's apparent motion is the fact that Earth orbits the Sun while tilted on its axis. The Earth's axial tilt of approximately 23.5° ensures that observers at different locations will see the Sun reach higher-or-lower positions above the horizon throughout the year.
hope this helps ^^
Answer:
Because the earth rotation, when we move around the sun for a whole 365 times then we will have passed 1 year.
Describe a method to investigate how the temperature changes when
different masses of ammonium nitrate are dissolved in water.
You do not need to write about safety precautions.
(6marks)
Answer:
Decrease temperature with increase in ammonium nitrate concentration.
Explanation:
The temperature changes when different masses of ammonium nitrate are dissolved in water because the ammonium nitrate takes energy from the surrounding water environment for the breaking of ionic bonds as a result the temperature of water decreases. When more concentration of ammonium nitrate is added to water, more decrease occur in temperature of water and the water becomes cold.
Hotness or a cold state of a substance or a solution is measured physically by temperature. It is measured by a device called a thermometer and can be in the form of Kelvin, degree Celsius or degree Fahrenheit.
Decreasing the temperature with an upsurge in the ammonium nitrate concentration can be used in determining the change in the temperature.
The change can be explained as:The alteration in temperature can be seen after adding more ammonium nitrate with various concentrations to the water.Ammonium nitrate accepts energy from the water present in its surrounding solution for splitting the ionic bonds present.This energy acceptance from water reduces the temperature of the water and with the increase in concentration lowers the water temperature more.Therefore, increased concentration reduce temperature.
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Which of the following is the mass in grams of 1 mole of a substance?
Answer:
he molar mass is defined as the mass in grams of 1 mol of that substance. One mole of isotopically pure carbon-12 has a mass of 12 g
Explanation:
What is the reaction of Fe + AgC2H9O2?
Answer:
To balance a chemical equation, enter an equation of a chemical reaction and press the Balance button. The balanced equation will appear above. Use uppercase for the first character in the element and lowercase for the second character. Examples: Fe, Au, Co, Br, C, O, N, F. Ionic charges are not yet supported and will be ignored.
Explanation:
the element found in group iiia and in period 2 is called
Answer:
Boron
Explanation:
The group III A is also known in the periodic table as group 13. The members of the group begin to appear in the second period.
At the beginning of this group III A is boron. Boron is a member of group III A as well as a member or period 2.
Boron is a metalloid and has only three valence electrons as other group III A elements.
What type of wave occurs on a guitar because both ends are fixed?
O A. destructive
O B. constructive
C. standing
D. musical
Answer:
Destructive
Explanation:
Draw the Lewis structure for the compound beryllium nitride, with chemical formula Be3N2
Answer:online research
Explanation:
Chemical equilibrium is relatively rare in living cells. An example of a reaction at chemical equilibrium in a cell would be
Answer:
(D) a chemical reaction in which both the reactants and products are not being produced or used in any active metabolic pathway
Explanation:
A) a reaction in which the free energy at equilibrium is higher than the energy content at any point away from equilibrium
B) a chemical reaction in which the entropy change in the reaction is just balanced by an opposite entropy change in the cellʹs surroundings
C) an endergonic reaction in an active metabolic pathway where the energy for that reaction is supplied only by heat from the environment
D) a chemical reaction in which both the reactants and products are not being produced or used in any active metabolic pathway
E) no possibility of having chemical equilibrium in any living cell
The correct answer for a reaction that describes chemical equilibrium in a cell would be a chemical reaction in which both the reactants and products are not being produced or used in any active metabolic pathway .
A reaction in chemical equilibrium is a bi-directional reaction in which both the reactants and the products are present in a stoichiometrically balanced way within the system at a given period of time under specific conditions.
From the definition, a reaction would be in equilibrium if
both the reactant and product are present but have ceased being producednone of the reactant or product is being used by another process within the cell.The correct option is, therefore, D
Scientific notation
1.9 x 10^3 + 2.3 x 10^4
n the electron-dot symbol
the dots represent electrons located in —
s, p, and d sublevels.
p sublevels, only.
s sublevels, only.
s and p sublevels, only.
Answer:
They represent the valence electrons, so s and p sublevels only! This does not include the d block!
How many atoms are in 12 moles of silver?
Answer:
NA=72.264x1023
Explanation:
I got you
What happens to the mass of a substance when it is heated, cooled, or mixed with other substances?
Answer:
the total weight of matter is conserved.
Explanation:
:)
2. When an atom loses an electron, it becomes a
_a._positive ion.
c. neutral ion.
b. negative ion.
d. neutral atom.
Answer:
A
Explanation:
Atoms of elements can lose or gain electrons making them no longer neutral, they become charged. A charged atom is called an ion. When an atom loses electron(s) it will lose some of its negative charge and so becomes positively charged. A positive ion is formed where an atom has more protons than electrons.
What kind of reaction is this?
1. Synthesis
2. Decomposition
3. Single Replacement
4. Combustion
5. Double replacement
6. Acid-Base
Answer:
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Forty percent of atoms of an element have a mass of 16 AMU. sixty percent of atoms have a mass of 18 AMU. What is the average atomic mass, in AMU, of this element?
Answer:
(16)(.40)+18(.60)= Then the average atomic mass in amu is 17.22Na + 2H2O → 2NaOH + H2
How many grams of NaOH could you make with 8.0465 g of Na?
? g NaOH (use 5 sig fig
According to the stoichiometry of the given chemical equation, 13.9939 grams of NaOH would be made with 8.0465 g of Na.
What is stoichiometry?Stoichiometry is the determination of proportions of elements or compounds in a chemical reaction. The related relations are based on law of conservation of mass and law of combining weights and volumes.
Stoichiometry is used in quantitative analysis for measuring concentrations of substances present in the sample. It is useful in balancing chemical equations and making solutions of different concentrations.As according to the given chemical equation 46 g sodium gives 80 g sodium hydroxide, thus, 8.0465 g of sodium will give 8.0465×80/46=13.9939 grams.
Thus, 13.9939 grams of NaOH would be made with 8.0465 g of Na.
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pls helppp
How many energy must be absorbed by 150.0 grams of water to raise it's temperature by 50.00°C?
The heat absorbed to raise temperature : Q = 31350 J
Further explanationGiven
m = mass = 150 g
Δt = Temperature difference : 50 °C
Required
Heat absorbed
Solution
Heat can be formulated
Q = m.c.Δt
The specific heat of water = c = 4.18 J/g °C
Input the value :
Q = 150 x 4.18 x 50
Q = 31350 J
If you used 10 grams of aluminum, how many moles of aluminum chloride can be produced?
Answer:
When 20.0 grams of aluminum and 30.0 grams of chlorine are reacted according to the above equation, the chlorine is the limiting reactant and the maximum yield of aluminum chloride is 0.28 moles or 37.33 grams.
What method would a geologist use to determine the approximate age of a rock found in a newly discovered formation?
Complete the table by checking the correct column(s) for each description.
Description
Isotonic
Solution
Hypotonic
Solution
Hypertonic
Solution
7. A solution that has the same osmotic
concentration as a cell's cytoplasm
8. A solution that causes a cell to shrivel
9. A solution that causes a cell to swell
10. A solution that neither shrinks nor swells a cell
11. A solution in which there is more water outside
the cell than inside the cell
12. A solution that causes water to move out of a cell
Answer:
7. isotonic
8. hypertonic
9. hypotonic
10. isotonic
11. hypotonic
12. hypertonic
The radii of the atoms become smaller from sodium to chlorine across period 3. This decrease is primarily a result of
Answer:
Nuclear Charge
Explanation:
As we move from sodium to chlorine across, there's increase in atomic number (protons). This also means there is increase in the valence electrons (The valence electrons is denoted by the group).
As the number of protons increases, the nuclear energy also increases. Due to this, the electrons are attracted more strongly and pulled closely to the nucleus.