2. Describe the difference between a step-up and step-down transformer.
Answers
Answer:
See Below
Explanation:
As this question is about the type of transformer, i am not going to discuss the detail the construction of it, rather the underlying principle. In practices transformer has two component namely primary and secondary. For an ideal transformer energy must conserved.
\(P_p=P_s\)
\(\\\Rightarrow V_{p}I_{p} & = & V_{s}I_{s}\qquad\text{as}\qquad \boxed{P=VI}\\\text{or},\frac{V_{p}}{V_{s}} & = & \frac{I_{s}}{I_{p}}\tag{1}\end{eqnarray}\)(1)
Where, \(V_p\), \(I_p\) are the voltage and current in the primary circuit and \(V_s\), \(I_s\) are that for secondary circuit respectively. If consider the number of turns of the coil in primary (\(N_p\)) and secondary circuit \((N_s)\) , then expression (1) further extends to
\(\frac{V_{p}}{V_{s}} = \frac{I_{s}}{I_{p}}=\frac{N_{p}}{N_{s}}\tag{2}\) (2)
Equation (2) is the main equation for transformer.
Now consider
\(\frac{V_{p}}{V_{s}} = \frac{N_{p}}{N_{s}}\)
Case-1: If \(N_{p} > N_{s}\) then \(V_{s} < V_{p}\) . This the step-down transformer. Where the number of turns in the primary is greater than that of secondary.
Case-2:If \(N_{s} > N_{p}\) then \(V_{s} > V_{p}\). This the step-up transformer. Where the number of turns in the primary is less than that of secondary.
Higher Context:A transformer is an electrical device that uses electromagnetic induction to transmit electrical energy between two or more circuits. This induction produces a force across the conductor, which is subsequently subjected to varying magnetic fields. In a power application, transformers typically reduce or enhance alternating current voltages.
This is where a step down transformer comes in, to increase or decrease an alternating current current. The primary voltage is larger than the secondary voltage in this sort of device. In a 220v application, a step down transformer will be required to use a 110v product. These transformers frequently rely on magnetic induction between coils. This is the component that transforms voltage and/or current levels. As a result, you'll have two (or more) insulated wire coils twisted around an iron core. When you add voltage to the primary (one of the coils), the core is magnetized and voltage is induced in the secondary (other coil). The voltage reduction is determined by the ratio of turns in the two sets of windings. As a result, if you have 200 turns on the main and 100 on the secondary, your ratio will be 2:1. The voltage ratio of a single transformer remains constant throughout all usage of that transformer.
To recap, a step down transformer transforms low current, high voltage electricity to high current, low voltage power. It is also possible to use a step down transformer as a reverse connection. To do this, a single phase step down transformer of 1 kva or greater is required.
The primary reason we may want a step down transformer in the first place is to conserve energy. When electrons move down a metal wire, they do not follow a straight, smooth route. They jostle around, wasting energy and heating up the wire. However, greater voltage and lower current consume less energy. This is why power plants deliver extremely high voltages down the line to your home, workplace, and so on.
Another reason for such high voltages is for applications that require them, like as industrial facilities. Their massive, powerful machinery may demand this voltage and do not need a step down transformer. These circumstances may necessitate the use of a step-up transformer, which may be accomplished, as previously stated, by utilizing a step-down in reverse. Because it is not the most efficient method, it is preferable to invest in a genuine step up transformer after researching your particular voltage needs. A step up transformer is one that raises the voltage from its main to secondary power source. In this sort of transformer, the secondary coil has more turns than the main coil, hence the induced secondary coil voltage is greater than the applied voltage on the primary coil.
When the relationship between voltage and turns in each coil is shown, it looks like this:
(Primary coil voltage minus secondary coil voltage) = (Primary coil turns minus secondary coil turns)
___________________
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Related Questions
Anybody know the formula for this?
Answers
Answer:
Cr2H6O7S so this the answer hope its useful
can i have help with this please
Answers
An acid-base reaction occurs when a fatty acid interacts with NaOH, and the fatty acid transfers a proton to the base to produce sodium carboxylate salt and water.
What is saponification ?Triglycerides are converted into glycerol and "soap" when they are saponified, or reacted with sodium or potassium hydroxide (lye). The triglycerides are often made of vegetable or animal fats. A hard soap is created when sodium hydroxide is used.
Fats, oils, or lipids (the acid) are turned into soap by the process of saponification by mixing them with sodium hydroxide (the base). Friction and heat from the chemical reaction are essential. The neutralization of the acid and base occurs during saponification.
Thus, any type of fat and sodium hydroxide react chemically in a process known as saponification.
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In a laboratory setting, concentrations for solutions are measured in molarity, which is the number of moles per liter (mol/L). Concentrations are often converted to more common units on the labels of household products. For a particular brand of bleach, the concentration of sodium hypochlorite (NaClO) is reported on the bottle as 7.25% by mass. The following information can thus be used to calculate the molarity of NaClO in the bleach:
• 1L of bleach has a mass of 1,100 grams.
• 7.25% of the mass of bleach is NaClO.
• 1 mol of NaClO has a mass of 74.44 grams.
What is the molarity (mol/L) of NaClO in the bleach?
Answers
The molarity of NaClO in the bleach is 0.101 M (mol/L).
Molarity (M) is the number of moles of solute per liter of solution.
It is calculated by dividing the number of moles of solute by the volume of the solution in liters.
To find the molarity of NaClO in the bleach, we need to use the following information given in the question:
1L of bleach has a mass of 1,100 grams7.25% of the mass of bleach is NaClO1 mol of NaClO has a mass of 74.44 gramsTo begin the calculation, we need to determine the mass of NaClO in 1L of bleach.
To do this, we can use the fact that 7.25% of the mass of bleach is NaClO:Mass of NaClO in 1L of bleach = 0.0725 x 1,100 g = 79.75 g
Next, we can convert this mass of NaClO to moles using its molar mass:
moles of NaClO = 79.75 g / 74.44 g/mol = 1.07 mol.
Finally, we can use the formula for molarity to calculate the molarity of NaClO in the bleach:
Molarity = moles of solute / volume of solution in litersMolarity = 1.07 mol / 10 L = 0.107 M (mol/L)We can round this answer to three significant figures to get the final answer of 0.101 M (mol/L).
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The distance to the moon is 238,855 miles. How many meters is this? Record your answer in scientific notation.
Answers
Answer:
384399861 meters
Explanation:
materials generally become warmer when light is reflected by them. absorbed by them. transmitted by them. all of these none of these
Answers
Materials generally become warmer when they are "absorbed" by light, this statement is more detailed. So, the correct answer is "absorbed by them."
Explanation: When a material absorbs light, it receives energy from the light, which leads to an increase in temperature. When light is absorbed by a material, the energy of the light is transformed into internal energy in the material. The temperature of a material can increase as a result of this energy absorption.
This is due to the fact that the increased internal energy of the molecules in the material causes them to vibrate more quickly and hence results in a temperature rise.
The light reflects or transmits when it passes through the material. When light reflects off a surface, it bounces back in the opposite direction. Transmitted light travels through a material without being absorbed by it.
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PLEASE HURRRYYYY
A buffer is made using HCO2Na. Which other substance should the buffer contain?
HCO2Li
HCO2H
NaNO3
HCl
Answers
Answer:
HCO₂H
Explanation:
A buffer is defined as the mixture between a weak acid and its conjugate base, or vice versa, in an aqueous solution.
The HCO₂Na (Sodium formate), is the conjugate base of formic acid, HCO₂H, a weak acid of pKa = 3.75.
Thus, to make a buffer using HCO₂Na, the other substance the buffer should contain is HCO₂H
Answer:
HCO₂H
Explanation:
What do you understand by the terms radial node and nodal plane, as applied to AO wavefunctions? Illustrate your answer using the 2s and 2p AOs. Explain why radial nodes arise from the radial part of the wavefunction, whereas nodal planes arise from the angular part of the wavefunction
Answers
In the context of atomic orbital (AO) wavefunctions, the terms "radial node" and "nodal plane" refer to different aspects of the wavefunction's behavior.
A radial node is a region in the AO wavefunction where the probability of finding an electron is zero along the radial direction. In other words, it represents a spherical shell where the electron is unlikely to be found. The number of radial nodes is determined by the principal quantum number (n) of the orbital. For example, the 2s orbital has one radial node, while the 2p orbital has no radial nodes.
On the other hand, a nodal plane is a flat plane within the AO wavefunction where the probability of finding an electron is zero along a particular direction. It represents a surface that divides the orbital into two regions of opposite phases. The number of nodal planes is determined by the angular quantum numbers (l and m) of the orbital. For example, the 2s orbital has no nodal planes, while the 2p orbital has one nodal plane (the xz or yz plane).
Radial nodes arise from the radial part of the wavefunction because they depend on the distance from the nucleus. The radial part determines the distribution of the electron density as a function of distance, and the nodes correspond to regions where the density drops to zero.
On the other hand, nodal planes arise from the angular part of the wavefunction because they depend on the orientation and shape of the orbital. The angular part describes the angular distribution of the electron density around the nucleus, and the nodal planes correspond to regions where the phase of the wavefunction changes sign.
In summary, radial nodes are related to the distance from the nucleus and arise from the radial part of the wavefunction, while nodal planes are related to the orientation and shape of the orbital and arise from the angular part of the wavefunction. The 2s orbital has one radial node and no nodal planes, while the 2p orbital has no radial nodes and one nodal plane.
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Drag each tife to the correct location. Identify the phases in the life cycle of small and big stars.
Answers
Phases of small stars: Planetary nebula phase, White dwarf phase and Black dwarf phase. Phases of big stars: Red supergiant phase, Supernova phase and Neutron star phase or Black Holes.
How are stars formed?Most galaxies have stars distributed throughout them that are born within dust clouds. The Orion Nebula is a well-known illustration of a dust cloud of this type. Deep within these clouds, turbulence creates knots with enough mass for the gas and dust to start collapsing under its own gravitational pull. The material in the cloud's centre starts to heat up as it breaks up. This heated core at the centre of the collapsing cloud is referred to as a protostar and will eventually turn into a star.
The majority of the stars in the Milky Way are found in pairs or in clusters of several stars, which could be explained by the possibility that the spinning clouds of collapsing gas and dust split into two or three blobs.
What is black hole?The event horizon of a black hole is an area of spacetime where gravity is so intense that nothing, not even light or other electromagnetic waves, has the energy to cross it. According to general relativity theory, a sufficiently compact mass can cause spacetime to distort and create a black hole.
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Answer:
average star → giant → planetary nebula → white dwarf
massive star → supergiant → supernova → neutron star (or black hole)
Explanation: plato
You arrive in my class 45 seconds after leaving math which is 90 meters away. How fast did you travel?
Answers
Answer:
Speed is 2
Explanation:
Speed = distance ÷ time
90/45=2
Answer: 2
Explanation:
Distance/Time = Speed
The atomic weight of hydrogen is 1.008 amu. What is the percent composition of hydrogen by isotope, assuming that hydrogen's only isotopes are 1H and 2D?
A. 92% H, 8% D
B. 99.2% H, 0.8% D
C. 99.92% H, 0.08% D
D. 99.992% H, 0.008% D
Answers
The percent composition of hydrogen by isotope, assuming that hydrogen's only isotopes are 1H and 2D, is 99.2% H and 0.8% D. (B)
1. The atomic weight of hydrogen is given as 1.008 amu.
2. The isotopes of hydrogen are 1H (with a mass of 1 amu) and 2D (with a mass of 2 amu).
3. To find the percent composition, we need to determine the relative abundance of each isotope.
4. Since the atomic weight is an average of the isotopic masses weighted by their abundance, we can set up an equation: (1 * x) + (2 * (1-x)) = 1.008, where x represents the relative abundance of 1H.
5. Solving for x, we get x = 0.992.
6. The relative abundance of 2D is 1-x = 0.008.
7. Convert these abundances to percentages: 1H is 99.2% and 2D is 0.8%.(B)
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The picture above shows a frying pan. Why are frying pans usually made out of metal?
Answers
Answer: The frying pan is made up of metals like aluminium or stainless steel as these metals are good conductor of heat.
Answer:
b. they are good conductors of heat
Explanation:
study island
What is the smallest representative particle of an element?
Answers
Answer:
atom
Explanation:
The smallest representative particle of an element is an atom.
What are atomsAtoms are the fundamental building blocks of matter and the smallest unit of an element that retains the chemical properties of that element. Each atom consists of a nucleus at the center, composed of positively charged protons and neutral neutrons, surrounded by a cloud of negatively charged electrons.
Atoms combine to form molecules or ions through chemical reactions, but they themselves represent the basic structure and identity of an element. Each element has a unique number of protons in its nucleus, known as its atomic number, which determines its position on the periodic table and its distinct chemical properties.
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Which of the following states of matter has a definite shape?
A solids and liquids only
B. liquids and gases only
C.solids only
D. liquids only
Answers
Answer:
A. Solids and liquids only
Explanation:
is Sulfuric Acid soluble if placed in water
Answers
Answer: Yes, sulfuric acid is highly soluble in water.
Explanation:
You are given a clear-water solution containing potassium nitrate. How could you determine whether the solution is unsaturated, saturated, or supersaturated?
Answers
Answer:
If it is unsaturated, we can dissolve some more amounts of potassium nitrate into it Explanation:
You take an IR of your unknown and you see two peaks in the carbonyl region. What does this mean?
A. Some ethyl acetate is contaminating your sample.
B. You used too much sample when you took the IR spectrum.
C. Some adiponitrile is contaminating your sample.
D. You used too little sample when you took the IR spectrum.
E. It doesn't mean anything. A compound with only one carbonyl can have two
Answers
Seeing two peaks in the carbonyl region of the IR spectrum would mean that E. It doesn't mean anything. A compound with only one carbonyl can have two peaks.
It doesn't necessarily mean anything significant that there are two peaks in the carbonyl region of the IR spectrum of the unknown compound. A compound with only one carbonyl group can still have two peaks due to factors such as overlapping absorption bands or the presence of different conformers.
However, it is important to note that the presence of contaminants in the sample can also cause additional peaks to appear in the spectrum. Therefore, it is important to consider the possibility of contamination and to check the purity of the sample before drawing any conclusions from the IR spectrum. Additionally, it is always important to use the correct amount of sample when taking an IR spectrum to ensure accurate results. Hence, the correct answer is Option A.
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Part A
Which of the following best describes the side chain of arginine at a pH of 11?
nonpolar
uncharged but polar
charged and polar
aprotic
hydrophobic
Charged and polar is incorrect. My textbook says the pKa of the sidechain is 12.48. Can you please explain what the correct answer is?
Answers
At a pH of 11, the side chain of arginine would be positively charged (NH3+) and polar.
This is because the pKa of the guanidine group (NH2) in the side chain of arginine is 12.48, which means that at a pH greater than 12.48, the guanidine group will be protonated and carry a positive charge. Since the nitrogen atom in the guanidine group is also surrounded by hydrogen atoms, the side chain is polar.
Key points:
The side chain of arginine is a guanidine group (NH2).The pKa of the guanidine group is 12.48, which means that at a pH greater than 12.48, the guanidine group will be protonated (NH3+).When protonated, the guanidine group carries a positive charge.The nitrogen atom in the guanidine group is surrounded by hydrogen atoms, which makes the side chain polar in nature.Learn more about arginine here:
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What could the fourth quantum number of a 3p3 electron be?
A. ms=-1/2
B. ms=-1
C. ms=+1
D. ms=0
Answers
cr31 has pka 5 3.80. find the ph of 0.010 m cr(clo4)3. what fraction of chromium is in the form cr(h2o)w21(oh)21?
Answers
The fraction of chromium in cr(h2o)w21(oh)21 is 0.000185.
Regardless of how strong or weak an acid is, it dissociates into water in a similar way.
H+ A -> H A-.
Its dissociation constant value is influenced by the acid's Ka value, which is defined as the acid's dissociation constant. If Ka is higher, the acid is more acidic, and vice versa if pKa is higher, the acid is more acidic.
More pKa is equal to -log(Ka), so if Ka is 10 then pKa is -1, and if Ka is 1000 then pKa is -3, meaning that the less acidic the solution is, the more pKa there is.
Consider that I had an acid with a C initial concentration. If a certain amount of A dissociates upon equilibrium, I obtain the equilibrium concentration of the acid as C-A and the equilibrium concentration of both H and the conjugate (Ac-) as A. because their stoichiometric coefficients are nearly equal for both.
You can write the Ka expression as follows using this information.
Ka is equal to [H] [Ac-] / [HAc].
A * A / C-A results from substitution.
Fraction of chromium= Ph/Pk
=0.010/53.80=0.000185.
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what is a well-tested, explanation that unifies a broad range of observations and hypotheses
Answers
Given the balanced equation representing a reaction:
HCl + H2O H3O+ + Cl-
The water molecule acts as a base because it
Answers
Answer:
It accepted a proton from HCl
Explanation:
When properly written, the equation box the reaction is given as; HCl(aq) + H2O(l) ----> H3O+(aq) + Cl-(aq).
According to Brownstead-Lowry definition of acids and bases, an acid donates protons while a base accepts protons.
Water molecule acts as a base in the reaction because it accepted a proton from HCl in the reaction above.
Help!!!!
I can’t understand this question
Answers
Answer:
free points!!!!!!!!!!!!!!
Can you use your plot to predict the absorbance of a 214 mm solution of nickel(ii) chloride and why?.
Answers
The absorbance of the 214 mm solution of nickel(ii) chloride can be obtained by fitting it into the regression line of the calibration curve.
What is a calibration graph?During measurements of the concentration of a solution using a spectrophotometer, it is conventional to first calibrate the instrument. The calibration is done by measuring the absorbance of various concentrations of the test solution after measuring the absorbance of the sample blank.
After the instrument has been calibrated, the absorbance of any test solution can now be obtained by fitting it into the regression line of the calibration curve.
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chegg he enthalpy of combustion of heptane is â€""48.06 kJ/g. Combustion of 4.04 g of heptane causes a temperature rise of 4.24°C in a certain bomb calorimeter. What is the heat capacity of this bomb calorimeter?
Answers
The heat capacity of the bomb calorimeter is approximately -0.702 kJ/K.
To determine the heat capacity of the bomb calorimeter, we can use the equation:
q = CΔT
where:
q is the heat absorbed or released in the calorimeter,
C is the heat capacity of the calorimeter, and
ΔT is the temperature change.
In this case, the combustion of 4.04 g of heptane caused a temperature rise of 4.24°C. We need to convert this temperature change to Kelvin by adding 273.15 to the Celsius value:
ΔT = 4.24 + 273.15 = 277.39 K
The enthalpy of combustion of heptane is given as -48.06 kJ/g. We need to convert the mass of heptane to grams:
Mass of heptane = 4.04 g
Now we can calculate the heat absorbed or released during the combustion of heptane using the enthalpy of combustion:
q = (Enthalpy of combustion) × (Mass of heptane)
= (-48.06 kJ/g) × (4.04 g)
To convert kilojoules (kJ) to joules (J), we multiply by 1000:
q = (-48.06 kJ/g) × (4.04 g) × (1000 J/1 kJ)
= -194.6624 kJ
The heat capacity of the bomb calorimeter, C, can be calculated by rearranging the equation:
C = q / ΔT
C = (-194.6624 kJ) / (277.39 K)
Calculating this division:
C ≈ -0.702 kJ/K
Therefore, the heat capacity of the bomb calorimeter is approximately -0.702 kJ/K. Note that the negative sign indicates that the calorimeter absorbs heat during the reaction.
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What is the amount of heat absorbed when the temperature of 75 grams of water increases from 20 to 75
Answers
Answer:
55°C
Explanation:
original is 20
after gaining heat is 75
75 - 20 = 55
Answer:
17242,5J
Explanation:
Given parameters:
Mass of water = 75g
Initial temperature = 20°C
Final temperature = 75°C
Unknown:
Amount of heat absorbed = ?
Solution
To find the amount of heat absorbed by water;
H = mcΔt
m is the mass
c is the specific heat capacity of water = 4.18J/g°C
Insert the parameters and solve;
H = 75 x 4.18 x (75 - 20)
H = 17242,5J
mmmmmmmmmmmmmtyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyy
Answers
Answer:
Yes.
Explanation:
Answer:
=0=0==00=0=0=
Explanation:
can i have Brainliest i need 1 more
Explain why as the temperature increases the solubility of solids (increases/decreases).
Answers
Answer:
The increased vibration (kinetic energy) of the solute molecules causes them to be less able to hold together, and thus they dissolve more readily.
what is the mass number of an element with an atomic number 10 and 10 neutrons
Answers
Answer:
Neon
Explanation:
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Use the formula to answer the following question4Li + Pb(SO4)2->2Li₂SO4 + PbHow many moles of Pb(SO4)2 are needed to produce 330 g Li₂SO4?
Answers
ANSWER
The number of moles of Pb(SO4)2 is 1.5 moles
EXPLANATION
Given that;
The mass of Li2SO4 is 330g
Follow the steps below to find the moles of Pb(SO4)2
Step 1; Write the balanced equation of the reaction
\(\text{ 4Li + Pb\lparen SO}_4)_2\rightarrow\text{ 2Li}_2SO_4\text{ + Pb}\)Step 2; Find the number of moles of Li2SO4 using the below formula
\(\text{ Mole = }\frac{\text{ mass}}{\text{ molar mass}}\)Recall, that the molar mass of Li2SO4 is 109.94 g/mol
\(\begin{gathered} \text{ mole = }\frac{\text{ 330}}{\text{ 109.94}} \\ \text{ mole = 3.00 moles} \end{gathered}\)The number of moles of Li2SO4 is 3.00 moles
Step 3; Find the number of moles of Pb(SO4)2 using a stoichiometry ratio
In the above equation of the reaction, 1 mole Pb(SO4)2 reacts to give 2 moles LiSO4
Let the number of moles of Pb(SO4) be x
\(\begin{gathered} \text{ 1 mole Pb\lparen SO}_4)_2\text{ }\rightarrow\text{ 2 moles Li}_2\text{SO}_4 \\ \text{ x moles Pb\lparen SO}_4)_2\text{ }\rightarrow\text{ 3.00 moles Li}_2SO_4 \\ \text{ Cross multiply} \\ \text{ 1 mole Pb\lparen SO}_4)_2\text{ }\times\text{ 3 .00 moles Li}_2SO_4\text{ = 2 moles Li}_2SO_4\text{ }\times\text{ x moles Pb\lparen SO}_4)_2 \\ \text{ Isolate x} \\ \text{ x = }\frac{\text{ 1 mole Pb\lparen SO}_4)_2\times3moles\cancel{Li_2}SO_4}{2moles\cancel{Li_2}SO_4} \\ \text{ x = }\frac{1\text{ }\times\text{ 3}}{2} \\ \text{ x = }\frac{3}{2} \\ \text{ x = 1.5 moles} \end{gathered}\)Therefore, the number of moles of Pb(SO4)2 is 1.5 moles
the half life of phosphorus-32 is 14 days. what is the decay constant? if you start with 1 microcurie, how much is left after 90 days
Answers
The decay constant of phosphorus-32 can be calculated using the formula: after 90 days, only 0.0112 microcuries of phosphorus-32 will remain.
decay constant = 0.693 / half life
Therefore, the decay constant of phosphorus-32 is:
decay constant = 0.693 / 14 days
decay constant = 0.0495 per day
Now, to calculate the amount of phosphorus-32 left after 90 days, we can use the formula:
N = N0 x e^(-λt)
Where:
N = the remaining amount of phosphorus-32 after time t
N0 = the initial amount of phosphorus-32 (1 microcurie in this case)
λ = the decay constant of phosphorus-32 (0.0495 per day)
t = time elapsed (90 days in this case)
Plugging in the values:
N = 1 microcurie x e^(-0.0495 x 90 days)
N = 1 microcurie x e^(-4.455)
N = 0.0112 microcuries
Therefore, after 90 days, only 0.0112 microcuries of phosphorus-32 will remain.
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