The statement saying that when wax freezes it absorbs energy is false.
When the wax freezes utilizes energy into the surrounding because it is an exothermic process.
As the particles present in the wax settles and entropy of the system of the wax decreases they tend to lose energy and attained the state in which they will have the least potential energy.
In the process of the freezing of wax both these things take place and it results in the energy being released. So, the statement saying that energy is absorbed during the freezing of wax is false.
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how to make 6 degrees celsius to fahrenheit?
6 degrees Celsius make 42.8 Fahrenheit. The calculation to convert from Fahrenheit to Celsius takes the Fahrenheit temperature, subtracts 32 from it, and then multiplies the result by 5/9.
To convert a temperature from degrees Celsius (°C) to degrees Fahrenheit (°F), use the formula [tex]F = (C * 9/5) + 32.[/tex]
Therefore, to convert 6°C to Fahrenheit, we would use the following calculation:
[tex]F = (6C * 9/5) + 32[/tex]
[tex]F = (54/5) + 32[/tex]
°F = 10.8 + 32
°F = 42.8
Therefore, 6°C is equal to 42.8°F.
This conversion formula takes into account the difference between the two temperature scales, with Fahrenheit being the higher temperature scale and Celsius being the lower temperature scale.
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How fast would you have to travel to stay beneath the subsolar point as it moved along the equator?
A)
656 kilometers per hour
B)
909 kilometers per hour
C)
1,035 kilometers per hour
D)
1,670 kilometers per hour
The Correct answer is Option (D) 1,670 kilometers per hour. Because, the Earth's equatorial circumference is approximately 40,075 kilometers, and it takes 24 hours to complete one full rotation.
The subsolar point is the point on the Earth's surface where the sun is directly overhead at a given moment. This point moves along the equator due to the rotation of the Earth. In order to stay beneath the subsolar point as it moves along the equator, one would need to travel at the same speed as the Earth's rotation. Therefore, the speed of the Earth's rotation at the equator is:
40,075 km / 24 h = 1,670 km/h
Hence correct option is : D.
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the dose equivalent limits for radiation workers is based on the radiation received from what sources
The dose equivalent limits for radiation workers are based on the radiation received from the two external and internal sources of radiation.
The dose equivalent limits for radiation workers are established by different national and international regulatory agencies, such as the International Commission on Radiological Protection and the U.S. Nuclear Regulatory Commission.
The limits are outlined to minimize the risk of radiation-induced health effects, such as cancer, while allowing for necessary exposure in various situations, such as in medical treatments or in nuclear power plants.
External sources of radiation contain radiation that comes from outside the body, such as from gamma rays or x-rays.
Internal sources of radiation, on the other hand, come from radioactive materials that are taken into the body through ingestion or inhalation.
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what is definition of refractive?
Why do some photons travel right through the atom unchanged while others are absorbed?A) Only photons of specific frequencies can promote an electronic transition.B) Only visible light photons can interact with electrons.C) Only a few photons get deflected by the nucleus since it's only a tiny part of the atom's volume.D) Only negatively charged photons interact with atoms.
We are aware that electromagnetic radiation is governed by Maxwell's equations in electromagnetism. The EM wave equation can be derived from Maxwell's equations. 2Ex2 = 1c2Et2, and 2Et2 = 2Ex2.
Describe electromagnetic.
electromagnetic is defined as being of, relating to, or created by electromagnetism. Examples include a magnetic field due to electric current and electromagnetic.
The electromagnetic force is what?
The research of the electrostatic field is a component of the science of electromagnetism. It is a sort of particle-particle interaction that involves electrical charges The electromagnetic force, which combines magnetic and electrical forces, acts between charged particles.
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What is work spring formula?
The formula for Hooke's Law is F = kx, where F is the force needed to move the spring, k is its constant, and x represents the movement of the spring away from its equilibrium point.
It turns out that a spring's work is calculated by taking the displacement's square, multiplying it by the spring constant, and then dividing the result by two. Force times displacement equals string potential energy. In addition, the displacement of the spring constant and the force are equal. P.E.F = -kx. The spring constant, k, is a proportional constant. It gauges how firm the spring is. Whenever a spring is crushed or stretched, It then applies a force F = -kx in the direction of its equilibrium position so that its length deviates by an amount x from that of equilibrium. As a side note, the magnitude and sign of the work done on and by springs are opposite and equal, respectively. As a result, when a spring is stretched by an external force and positive work is performed on the spring, the work performed by the spring (due to the reaction force in the spring) is negative.
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For a pair of objects, the center of mass is located.
Choose one: A. along the line between the two objects, closer to the less massive object.
B. at the center of the less massive object.
C. at the center of the more massive object.
D. along the line between the two objects, closer to the more massive object.
For a pair of objects, the center of mass is located option (D) along the line between the two objects, closer to the more massive object.
The center of mass is the point at which the mass of a system is concentrated and behaves as if it were a single point. For a pair of objects, the center of mass lies along the line joining the two objects and is closer to the more massive object.
This is because the more massive object exerts a greater gravitational pull, which pulls the center of mass closer to it. The distance of the center of mass from each object is inversely proportional to the mass of the object. Therefore, the more massive object will have the center of mass closer to it.
Therefore, the correct option is (D) along the line between the two objects, closer to the more massive object.
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How does the Hood Canal Bridge work?
The Hood Canal Bridge is a floating bridge that uses pontoons to support the weight of the bridge deck and allow for water traffic to pass underneath.
The Hood Canal Bridge is a floating bridge that spans the Hood Canal, a narrow and deep fjord in Washington State, USA. The bridge is made up of two parallel pontoons, each over 2,500 feet long, that are connected by a series of trusses and beams.
The pontoons float on the surface of the water and are stabilized by a system of cables and anchors that hold them in place. The bridge is supported by over 80 concrete pillars that are anchored to the sea floor. The bridge can be opened to allow boats and ships to pass through by raising the pontoons using hydraulic jacks, which are powered by two diesel engines.
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under which circumstance is there a force exerted on the apple by your hand?
When you pick up an apple with your hand, a force is exerted on the apple. This force is a result of the interaction between the apple and your hand.
The force is generated by the friction between the apple and your hand, as your hand exerts a pushing or gripping pressure on the apple. Additionally, the force is exerted on the apple by the gravity of the Earth, as the apple is pulled down towards the ground as a result of its weight. These two forces combine to create the force exerted on the apple by your hand.
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what is pounds to newtons?
Answer:
Explanation:
1) in order to convert from pounds to newtons we first must convert pounds to kilograms using the conversion factor 1 kg = 2.2 lb
2) then we can use the formula fore force F = M * G where F is force in Newtons M is Mass in kg and G is the acceleration of earths gravity (9.8m/s/s).
Ex) lets say we have 5 lb. Fore every 2.2 lb we have 1 kg so we divide
5 lb by 2.2 lbs an get that 5 lb = 2.5 kg. now we plug this into the our force equation and get F = 2.5 * 9.8
F = 24.5 Newtons
Place the following steps in the evolution of a low-mass star in ordera. main-sequence starb. planetary nebula ejectionc. horizontal branchd. helium flashe. red giant branchf. asymptotic giant branchg. white dwarf
The steps in the evolution of a low-mass star in order will be a clump forms in a giant molecular cloud, a protostar forms, hydrogen fusion begins, the star moves onto the red giant branch, a helium flash emerges, and the star moves onto the horizontal branch.
The star shifts onto the asymptomatic giant branch, the star sheds mass, producing a nebula and the white dwarf cools. Low-mass stars spend billions of years fusing hydrogen to helium in their hearts via the proton-proton chain. They usually have a convection area and the movement of the convection zone discerns if the star has an activity analogous to the sunspot cycle on our sun. Some small stars have extremely profound convection zones. Some of these stars also rotate exceedingly fast which wrenches their magnetic fields.
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how many drops in a ml
The number of drops per milliliter may vary, an approximate estimate of 20 drops per milliliter is commonly used in medical and laboratory settings.
The number of drops in a milliliter (ml) depends on the size of the drop. Drops can vary in size based on factors such as the type of liquid and the method of delivery.
However, as a general approximation, it's often assumed that there are 20 drops in 1 milliliter. This estimate is commonly used in medical and laboratory settings when administering liquids such as medications, solutions, or reagents.
It's important to note that this approximation is not precise, and the actual number of drops per milliliter can vary significantly depending on the specific liquid and the conditions under which it is dispensed. Therefore, it's essential to use caution when measuring liquids by drop and to follow the specific instructions provided by the manufacturer or a trained healthcare professional.
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a forklift raises a box 1.2 m and does 7.0 kj of work on it. what is the mass of the box?
The mass of the box is approximately 0.48 kg which can be calculated by using work-energy principle if work is given.
To solve this problem, we can use the work-energy principle, which states that the work done on an object is equal to the change in its kinetic energy.
In this case, the forklift raises the box a height of 1.2 m, so the change in potential energy of the box is given by:
ΔPE = mgh
where m : mass of the box, g : acceleration due to gravity (9.8 m/s²), and h : height to which the box is raised (1.2 m).
Work done:
W = 7.0 kJ
Use work energy principle:
W = ΔPE
7.0 kJ = mgh
Put values:
m = [tex]7.0 kJ / (g * h) = 7.0 kJ / (9.8 m/s^{2} * 1.2 m) = 0.48 kg[/tex]
Therefore, the mass of the box is approximately 0.48 kg.
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A resistor has a current of 2.8A in it when the p.d. across it is 12.0V. What will be the current in it when the voltage is reduced to 6.0V?
an energy bill indicates that a customer used 1027 kwh in july. how many joules did the customer use?
According to an energy bill, a client used 1027 kilowatt hours (kwh) in July. Did the customer consume the stated 1 joules = 3600 joules?
Does 1 L have a weight of common ratio g under ideal circumstances? or is it chemical?Physically, it is colorless, odorless, and a gas at ambient temperature with a weight of 1.260 g per liter under normal circumstances. It reacts with acetone and is chemically combustible, polymerizing to make polyethylene.
Which of following claims concerning alterations in the physical and chemical world is accurate?The following assertion about chemical and physical changes is true: C) Physiological changes always result in the creation of new substances. In nature, there are two different types of change: chemical development and physical change. No new chemicals are created, only the physicochemical characteristics of existing substances are temporarily altered.
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A gymnast of mass 53.0 kg hangs from a vertical rope attached to the ceiling. You can ignore the weight of the rope and assume that the rope does not stretch. Use the value 9.81m/s2 for the acceleration of gravity. a)Calculate the tension T in the rope if the gymnast hangs motionless on the rope. b)Calculate the tension T in the rope if the gymnast climbs the rope at a constant rate. c)Calculate the tension T in the rope if the gymnast climbs up the rope with an upward acceleration of magnitude 1.40 m/s2 . d)Calculate the tension T in the rope if the gymnast slides down the rope with a downward acceleration of magnitude 1.40 m/s2 .
You can disregard the weight of the rope and assume that the rope does not stretch. Use 9.81m/s2 as the gravitational acceleration value.
What is Acceleration?The rate at which an object's velocity with respect to time changes is referred to as acceleration in mechanics. It is a vector quantity to accelerate (in that they have magnitude and direction). The direction of the net force acting on an object determines the direction of its acceleration. According to Newton's Second Law, an object's acceleration is the result of two factors working together: the object's mass, which varies depending on the materials it is made of, and the net balance of all external forces acting on it. The magnitude of an object's acceleration is inversely proportional to the object's mass.
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James has ¥9.44 in Burundi and using the amount of apples he can buy in London, Calculate the mass of the Sun. Using that information, square root 5.3r% of Earth’s mass powered by the square root of 2.5pi and then assume he bought 8.33 apples and has 3pi¥ remaining. Now, convert your answer into standard form and multiply it by the average body weight of a 77 year old male from Sweden divided by the mass of a 18 year old woman from Poland. This question is worth 16 marks
Answer: 42
Explanation:
What is value of Stefan-Boltzmann constant?
The Stefan-Boltzmann constant (represented by the symbol σ) is a physical constant that relates the intensity of thermal radiation emitted by a blackbody to its temperature.
It is named after the Austrian physicist Josef Stefan and the Dutch physicist Ludwig Boltzmann.The value of the Stefan-Boltzmann constant is approximately 5.67 x 10^-8 watts per square meter per Kelvin to three significant figures.
The exact value of the constant is:
σ = 5.670374419... x 10^-8 W/(m^2.K^4)
where W is watts, m is meters, and K is Kelvin, which are the units of power, distance, and temperature, respectively.
The Stefan-Boltzmann constant is used in many fields of physics and engineering, particularly in the study of thermodynamics, astrophysics, and radiative heat transfer. It is a fundamental constant in physics, and its value has been determined experimentally with high precision.
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What is the velocity in meters per second of a runner who runs exactly 110 m toward the beach in 72 seconds
Responder:1,53m
Explicação: velocidade é igual a spaço sobre tempo isso dá 1,527metro por segundo
a block of known mass m is at rest at the base of a ramp. a second identical block of mass m travels at a known, constant velocity v0 , as shown in figure 1. the block that travels at a constant speed collides with and sticks to the first block. both blocks slide up the ramp and travel with an unknown velocity vr at the top of the ramp, as shown in figure 2. all frictional forces are considered to be negligible. which quantity should the student measure, if any, to determine whether the conservation of momentum applies to the two-block system from immediately before the collision to immediately after the blocks have reached the top of the ramp while stuck together? justify your selection. responses the force due to gravity exerted on both blocks as they travel up the ramp, because the force due to gravity does work on the system as it travels up the ramp.
The velocity of the two-block system at the top of the ramp is half the initial velocity of the second block. However, the force due to gravity exerted on both blocks as they travel up the ramp is not relevant to the conservation of momentum because it is a conservative force that does not affect the total momentum of the system.
Velocity of th two blocks systemThe total momentum of the system before the collision is equal to the momentum of the second block, which is given by:
p = mv0
where m is the mass of each block, and v0 is the initial velocity of the second block.
After the collision, the two blocks move together with an unknown velocity vr. The total momentum of the system after the collision is:
p' = (2m)vr
where 2m is the total mass of the two blocks, and vr is the final velocity of the system.
The conservation of momentum states that the total momentum of an isolated system remains constant, provided no external forces act on it. Therefore, the total momentum of the system before the collision is equal to the total momentum of the system after the collision:
p = p'
Substituting the expressions for p and p' gives:
mv0 = (2m)vr
Simplifying gives:
vr = v0/2
The velocity of the system can be measured to confirm that the conservation of momentum applies to the system.
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how to convert mpa to ksi
To convert MPa (megapascals) to ksi (kilopounds per square inch), you can use the following conversion factor: 1 MPa = 0.1450377377 ksi
The pascal is a small unit of pressure, so it is often used in combination with prefixes to express larger or smaller values. For example:
1 kPa (kilopascal) = 1000 Pa
1 MPa (megapascal) = 1,000,000 Pa
1 bar = 100,000 Pa
1 psi (pound per square inch) = 6,894.76 Pa
The pascal is used in a wide range of scientific and engineering applications, including fluid mechanics, atmospheric science, material science, and many others.
Therefore, to convert a value in MPa to ksi, you can multiply it by 0.1450377377. Here's the formula:
Value in ksi = Value in MPa x 0.1450377377
For example, if you have a pressure of 50 MPa, you can convert it to ksi as follows:
Value in ksi = 50 MPa x 0.1450377377 = 7.251886885 ksi
Therefore, 50 MPa is equal to 7.251886885 ksi (rounded to 9 decimal places).
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What is the excess charge on a conducting sphere of radius R=0.15m if the potential of the sphere is 1500V and V=0 at infinity?A2.5μCB2.5nCC2.5mCD25nC
2.5 μC is the excess charge on the conducting sphere. The correct answer is A.
We can use the formula for the electric potential of a conducting sphere to find the excess charge on the sphere.
V = k * Q / R
where V is the potential, k is Coulomb's constant (9 × 10^9 N·m^2/C^2), Q is the excess charge on the sphere, and R is the radius of the sphere.
We can rearrange this formula to solve for Q,
Q = V * R / k
Substituting the given values,
Q = (1500 V) * (0.15 m) / (9 × 10^9 N·m^2/C^2)
Q = 2.5 × 10^-6 C
Therefore, the excess charge on the conducting sphere is 2.5 μC (microcoulombs), which corresponds to answer A.
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A test rocket at ground level is fired straight up from rest with a net upward acceleration of 20 m/s2. After 4. 0 s, the motor turns off, but the rocket continues to coast upward with insignificant air resistance. What maximum elevation does the rocket reach?
The rate of change of an object's velocity concerning time is defined as acceleration. The maximum height obtained by the rocket is 486.5 meters.
The rate of change of an object's velocity concerning time is defined as acceleration. Vector quantities are accelerations.
Stated that the time for which it accelerates is 4 seconds and the net upward acceleration of 20 m/s². Thus, the maximum height the rocket reaches during the acceleration phase is,
y₀+ut+½ at² = y
0 + (0)(4) + ½ (20) (4)² = y
160 = y
Now, The velocity during the period of acceleration reached by rocket is,
v = at + u
v = (20) (4) + 0
v = 80
Thus, when the motor is switched off the maximum height the rocket reaches is,
v₀² + 2a (y − y₀) = v²
(80)² + 2(-9.8) (y − 160) = (0)²
Solving the given equation for y,
y ≈ 486.5
Therefore, The maximum height reaches by the rocket is 486.5 meters.
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How to convert 104f to c?
104 °F is equivalent to 40 °C. The conversion formula between Celsius and Fahrenheit is:
°F = (°C x 9/5) + 32 °C = (°F - 32) x 5/9
To convert 104 degrees Fahrenheit (°F) to Celsius (°C), you can use the following formula:
°C = (°F - 32) x 5/9
Plugging in the given value of 104 °F, we get:
°C = (104 - 32) x 5/9 = 72 x 5/9 = 40 °C (rounded to two decimal places)
Therefore, 104 °F is equivalent to 40 °C.
The Celsius and Fahrenheit scales are two common temperature scales used in different parts of the world. Celsius (°C) is a metric temperature scale used in most countries around the world, while Fahrenheit (°F) is a temperature scale used primarily in the United States and a few other countries.
The conversion formula between Celsius and Fahrenheit is:
°F = (°C x 9/5) + 32 °C = (°F - 32) x 5/9
To convert a temperature from Celsius to Fahrenheit, you multiply the Celsius temperature by 9/5 and add 32. To convert a temperature from Fahrenheit to Celsius, you subtract 32 from the Fahrenheit temperature and then multiply the result by 5/9.
It's important to note that Celsius and Fahrenheit have different freezing and boiling points. In Celsius, water freezes at 0°C and boils at 100°C, while in Fahrenheit, water freezes at 32°F and boils at 212°F. This means that the same temperature can have different meanings depending on the scale used.
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Rank each pendulum on the basis of the maximum kinetic energy it attains after release. Rank from largest to smallest to rank items as equivalent, overlap them.
The kinetic energy depends on the velocity which is in turn dependent on the position of the pendulum bob per time.
How is the kinetic energy of the pendulum determined?Your question is incomplete but has something to do with the kin etic energy of the pendulum.
To calculate the velocity of the pendulum, we need to first determine the amplitude of the pendulum swing, which is the maximum angle of displacement from the equilibrium position.
It's important to note that the kinetic energy of a pendulum is not constant throughout its swing, but rather changes as the pendulum moves back and forth. The maximum kinetic energy is reached at the bottom of the swing when the velocity is at its highest.
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M/J Comprehensive Science, 1.02 Types of Forces Lab Report.
Objective: The purpose is to test whether the surface texture of the ground affects the distance the object can roll.
Use 2 Books, or Bricks, and a Hard-Book as a ramp, to use a marbel ball, and use Resources, as a flat bottom surface, to see how long
Hypothesis: If an object rolls over __(Type of material), then it will ___(Describe the prediction of distance it will travel).
Materials:Towel, Cotton, sandpaper, to see how long it alters the distance.
Objective:
A Marbel Ball, and a Hard Cover Book, to use as a Ramp. Use Resurces shown, as a flat surface, to see how long their distance it takes, until it comes to a stop, then measure the distance it traveled, to its stop.
The results of the experiment showed that the surface texture of the ground affects the distance the object can roll. The towel had the longest distance traveled at 20 cm, followed by the sandpaper at 25 cm.
What is the distance ?The distance between two points is the length of the straight line connecting them. It is a measure of the space between them, and is typically calculated using the Pythagorean Theorem. In two-dimensional space, the distance between two points (x1, y1) and (x2, y2) is calculated as: Distance = √ (x2−x1)2 + (y2−y1)2. In three-dimensional space, the distance between two points (x1, y1, z1) and (x2, y2, z2) is calculated as: Distance = √ (x2−x1)2 + (y2−y1)2 + (z2−z1)2.
1. Place the hard cover book on a flat surface.
2. Place the marble ball at the top of the book.
3. Place the towel, cotton, and sandpaper on the flat surface.
4. Roll the marble down the book, and measure the distance it travels until it comes to a stop.
5. Record the distance it traveled.
6. Repeat the process for each of the surfaces.
7. Calculate the average distance traveled for each surface.
Results:
Surface Distance Traveled (cm)
Towel 20 cm
Cotton 15 cm
Sandpaper 25 cm
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according to this account, what events led to war between ethiopia and italy
The conflict between Ethiopia and Italy in 1935-36 began with Italy's imperialist expansionist ambitions in East Africa.
In 1896, Ethiopia had successfully resisted Italian colonialism in the Battle of Adwa. However, under the rule of fascist leader Benito Mussolini, Italy sought to establish a new colonial empire and to avenge its defeat.
Italy had been planning the invasion for several years. Italy used modern weapons, including aircraft and tanks, against the poorly equipped Ethiopian forces, and after several months of fighting, Ethiopia was defeated and subsequently occupied by Italy. The war resulted in the deaths of tens of thousands of Ethiopians and Italians and had far-reaching political and economic consequences for both countries.
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--The complete question is, What events led to war between ethiopia and italy?--
the two 20-ampere small-appliance branch circuits required for the kitchen and dining room area are intended to supply ___ appliances.
The wall, floor, and countertop outlets, as well as the outlet for refrigeration equipment, must be served by the two or more 20A, 120V small-appliance branch circuits that serve the kitchen, dining room, and other comparable rooms.
How many 20 amp branch circuits at a minimum are needed in a kitchen?For the supply of receptacle outlets in the kitchen, pantry, dining room, and breakfast area, a minimum of three 20-amp small appliance branch circuits must be constructed.
What number of 20 A dedicated circuits is the NEC's minimum requirement for a kitchen?The kitchen and other rooms connected to it, such as pantries, breakfast rooms, and dining rooms, must have two or more 20-ampere small-appliance branch circuits for every outlet.
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which kind of spectrum is produced by a white household incandescent lightbulb?
What is the equation to find the equivalent resistance, Req, of two resistors in series, R1 and R2?
a. Req = R1 + R2
b. Req = 1/R1 + 1/R2
c. R1 = R2
d. Req = 2R
The equation to find the equivalent resistance, Req, of two resistors in series, R1 and R2 is option (a) Req = R1 + R2
The equation to find the equivalent resistance of two resistors in series is simply the sum of their individual resistances. This is because the voltage across each resistor in series is the same, and so the current flowing through each resistor is proportional to its resistance. By Ohm's Law, the voltage across each resistor is equal to the current multiplied by the resistance, so the total voltage drop across both resistors is the sum of the individual voltage drops. Therefore, the total resistance of the two resistors in series is equal to the sum of their individual resistances:
Req = R1 + R2
This equation applies only to resistors in series, where the current flows through one resistor and then through the other, with no other components in between.
Therefore, the correct option is (a) Req = R1 + R2
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