To which region of the electromagnetic spectrum does the peak emission of an electric stove (T=660 K) belong to?
A) Blue end of the visible spectrum.
B) Red end of the visible spectrum
C) Microwave region
D) Infrared region
Answers
The region of the electromagnetic spectrum where the peak emission of an electric stove with a temperature of 660 K belongs to:
(D) Infrared region
Here we can use Wien's Law.
Wien's Law states that the peak wavelength (λmax) is inversely proportional to the temperature (T). The formula is:
λmax = b / T
where b is Wien's displacement constant, approximately 2.9 x 10⁻³ m K.
Now, the peak wavelength for the electric stove:
λmax = (2.9 x 10⁻³ m K) / 660 K
= 4.39 x 10⁻⁶ m or 4390 nm
The peak wavelength of 4390 nm falls within the infrared region of the electromagnetic spectrum. Therefore, the peak emission of an electric stove with a temperature of 660 K belongs to the infrared region.
So, correct option is D) Infrared region
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Related Questions
!!! If each compound undergoes electrophilic aromatic substitution, where should the substituent be added? Phenol?
Benzaldehyde?
Benzoic Acid?
Bromobenzene?
Nitrobenzene?
Toluene?
Answers
The substituent should be added at different locations on the compounds in electrophilic aromatic substitution are: Phenol: ortho or para position to the -OH group, Benzaldehyde: ortho or para position to the -CHO group.
What is Electrophilic aromatic substitution?For each of the compounds that undergo electrophilic aromatic substitution, the substituent should be added to the ring. The location of the substituent, however, differs depending on the specific compound. The location is dependent on the presence of any functional groups already present in the ring.
Phenol: The substituent is added to the ortho or para position to the -OH group.
Benzaldehyde: The substituent is added to the ortho or para position to the -CHO group.
Benzoic acid: The substituent is added to the ortho or para position to the -COOH group.
Bromobenzene: The substituent is added to the ortho or para position to the bromine atom.
Nitrobenzene: The substituent is added to the meta position to the nitro group.
Toluene: The substituent is added to the ortho or para position to the methyl group.
Therefore, when each compound undergoes electrophilic aromatic substitution, the substituent should be added to the ring. The specific location is determined by the presence of any functional groups already present in the ring.
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How do you find the specific heat at constant volume of a gas?
Answers
To find the specific heat at constant volume of a gas, you need to measure the change in internal energy of the gas when it is heated at constant volume.
The specific heat at constant volume is defined as the amount of heat energy required to raise the temperature of a unit mass of the gas by one degree Celsius while keeping the volume constant.One way to measure the specific heat at constant volume is to perform an experiment in which the gas is heated in a container of fixed volume and the change in internal energy is measured. The heat energy supplied to the gas is equal to the change in internal energy plus the work done by the gas, which is zero in this case because the volume is held constant.The specific heat at constant volume can then be calculated using the equation:
C_v = ΔU / mΔT
where ,
ΔU is the change in internal energy,
m is the mass of the gas, and
ΔT is the change in temperature.
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You find some limestone rock in southern Indiana and notice that it has fossil trilobites in it. Later you find the same fossil trilobites in a limestone in Colorado. From this you determine that the two rock types were deposited during the same time period using what concept or principle?
Answers
The concept or principle used to determine that the two rock types were deposited during the same time period is the principle of faunal succession.
This principle states that fossils of similar organisms found in rocks from different locations were deposited during the same time period, as the distribution of fossils in the rock layers is related to the relative ages of the rocks.
By finding the same fossil trilobites in both the Indiana and Colorado limestone rocks, it can be inferred that the rocks were deposited during the same time period and were likely part of the same geologic formation.
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baseball player standing at the edge of a vertical cliff throws a baseball initally in the horizontal direction four times with four different horizontal speeds: Ball 1 has the largest initial speed, ball 2 has the next largest initial speed, ball three has the third largest initial speed, and ball 4 has the lowest initial speed. Which of the following statements is true in regared to the time of fight? a. Ball 4 is in the alt the longest. b. Bail 2 is in the air the longest. c. Ball 1 is in the air the longest. d. The time of fight is the same for all four baseballs. e. Bail three is in the air the longest.
Answers
A baseball player standing at the edge of a vertical cliff throws a baseball initially in the horizontal direction four times with four different horizontal speeds. Which of the following statements is true in regards to the time of flight?The time of flight is the same for all four baseballs.
The statement, "The time of flight is the same for all four baseballs" is true regarding the time of flight in regards to the four baseballs that the baseball player throws initially in the horizontal direction from the edge of the vertical cliff. This is because the only factor that affects the time of flight is the vertical velocity. Since there was no vertical velocity, the time of flight will remain the same.
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A baseball is thrown 50.0m in 3.0s, what is the average speed of the baseball? Calculated answer is 16.666667! What is the correct answer when using significant figures?
Answers
Answer:
20m/s
Explanation:
Given parameters:
Distance of throw = 50m
Time = 3s
Unknown:
Average speed = ?
Solution:
Average speed is distance divided by time;
Average speed = \(\frac{distance }{time}\)
Insert the parameters and solve;
Average speed = \(\frac{50}{3}\) = 16.66667m/s = 20m/s
An atom of xenon has a mass number of 127 amu. How many neutrons
does it contain? *
Answers
Answer:
73 neutrons.
Explanation:
Data obtained from the question:
Mass number of Xenon = 127.
Neutron number =...?
We can obtain the number of neutron present as follow:
Atomic number of Xenon = 54
Recall:
Atomic number = proton number = 54
Mass number = proton + neutron
127 = 54 + Neutron
Neutron = 127 – 54
Neutron = 73.
Therefore, 73 neutrons are present in the Xenon atom.
(b) In a constant head permeameter test the following results were obtained: Duration of test =300 seconds Quantity of water collected =500ml Head difference in manometer =45 mm Distance between manometer tappings =100 mm Diameter of test sample =100 mm From the data above, calculate the; (i) Hydraulic gradient. (ii) Flow rate. (iii) Hydraulic conductivity.
Answers
(i) The hydraulic gradient is 0.45.
(ii) The flow rate is approximately 0.00000167 cubic meters per second.
(iii) The hydraulic conductivity is approximately 0.000037 meters per second.
(i) Hydraulic gradient:
The hydraulic gradient (i) can be calculated by dividing the head difference (h) by the distance (L) between the manometer tappings:
i = h / L
Given:
Head difference (h) = 45 mm
Distance between manometer tappings (L) = 100 mm
Converting the units to meters:
h = 45 mm / 1000 = 0.045 m
L = 100 mm / 1000 = 0.1 m
Substituting the values into the formula:
i = 0.045 m / 0.1 m = 0.45
(ii) Flow rate:
The flow rate (Q) can be calculated using the equation:
Q = (V / t) / A
Where V is the quantity of water collected, t is the duration of the test, and A is the cross-sectional area of the test sample.
Given:
Quantity of water collected (V) = 500 ml = 0.5 L
Duration of test (t) = 300 seconds
Diameter of test sample (d) = 100 mm
Converting the units to meters:
V = 0.5 L = 0.5 / 1000 = 0.0005 m³
t = 300 seconds
d = 100 mm / 1000 = 0.1 m
Calculating the cross-sectional area (A) using the formula for the area of a circle:
A = π * (d/2)^2
Substituting the values:
A = π * (0.1/2)^2 = π * 0.005^2 = 0.00007854 m²
Substituting the values into the formula for flow rate:
Q = (0.0005 m³ / 300 s) / 0.00007854 m²
Calculating the flow rate:
Q = 0.00000167 m³/s
(iii) Hydraulic conductivity:
The hydraulic conductivity (K) can be calculated using Darcy's Law:
K = Q / (A * i)
Given the values we calculated:
Q = 0.00000167 m³/s
A = 0.00007854 m²
i = 0.45
Substituting the values into the formula:
K = 0.00000167 m³/s / (0.00007854 m² * 0.45)
Calculating the hydraulic conductivity:
K ≈ 0.000037 m/s
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Describe the language of the following PDA (z is the stack end symbol) (the figure can be located under a, z/bbz X, z/z b,6/1 ۸, 2/2 90 91 92 a, b/bbb 1 b,b/1
Answers
The language of the given pushdown automaton (PDA) can be described as follows:
The PDA has a stack alphabet consisting of symbols 'a', 'b', 'z', '6', '1', '۸', '2', '9', '0', 'x', 'y'. 'z' represents the stack end symbol.
The transitions of the pushdown automaton (PDA) are as follows:
(a, z, z) -> (X, z): This transition allows the PDA to replace an 'a' at the input with an 'X' on the stack while maintaining the stack end symbol 'z'.(z, b, z) -> (z, z): This transition allows the PDA to pop a 'b' from the input without modifying the stack.(z, z, b) -> (6, 1): This transition allows the PDA to push '6' and '1' onto the stack when encountering a 'b' on the input.(6, 1, b) -> (۸, 2): This transition allows the PDA to replace the '6' and '1' on the top of the stack with '۸' and '2' respectively when another 'b' is read from the input.(x, y, b) -> (b, b, b): This transition allows the PDA to replace 'x' and 'y' on the top of the stack with 'b', 'b', and 'b' when a 'b' is read from the input.(b, b, b, b) -> (1, b): This transition allows the PDA to replace the 'b', 'b', and 'b' on the top of the stack with '1' and 'b' when another 'b' is encountered.(1, b, b) -> (1, 1): This transition allows the PDA to replace the '1' and 'b' on the top of the stack with '1' and '1' when another 'b' is read from the input.(1, 1, z) -> (z, z): This transition allows the PDA to pop '1' from the stack without modifying the input.Thus, the language accepted by this PDA is characterized by a sequence of 'a's followed by a sequence of 'b's, where the number of 'b's is three times the number of 'a's, and each 'b' is followed by a corresponding sequence of '90', '91', '92', 'a', 'b', 'b', 'b', '1', 'b', 'b', '1', and ending with '1'.
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The diameter of a washer is normally distributed with u = .012 g = .0024.
What will be the value of the diameter of a washer so that 45% of the diameters are greater?
Answers
The value of the diameter of the washer so that 45% of the diameters are greater is approximately 0.0161. The problem states that the diameter of a washer is normally distributed with a mean (μ) of 0.012 and a standard deviation (σ) of 0.0024.
We want to find the value of the diameter that corresponds to the top 45% of the distribution.
To find this value, we need to calculate the z-score corresponding to the top 45% of the distribution. The z-score represents the number of standard deviations a value is from the mean. We can use the z-table or a statistical calculator to find the z-score associated with a cumulative probability of 0.45.
In this case, the z-score is approximately 1.645. Using the formula z = (x - μ) / σ, we can rearrange it to solve for x (the diameter we are looking for).
x = μ + (z * σ)
x = 0.012 + (1.645 * 0.0024)
x ≈ 0.0161
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Which example provides a complete scientific description of an object in motion?
Answers
How do icebergs form in saltwater?
Answers
An iceberg is formed by the broken part of a large glacier that floats into the sea. The iceberg is composed of fresh water, just like the glaciers or ice in the North Pole. Since, freshwater is less thick than salty seawater, icebergs float in the water.
When chunks of ice break off the end of a glacier that is flowing into ocean, icebergs are created.
Since, seawater has a slightly higher density than ice, the iceberg floats with the majority of its mass below the surface. A cork, on the other hand, floats quite near to the water's surface due to its density, which is around 20% that of water.
As moving icebergs are dangerous, they have never been a main supply of drinking water. Freshwater is released by melting glaciers and icebergs, which also lowers the salinity of the surrounding sea.
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What is the current in a 160V circuit if the resistance is 2Ω?
V=
I=
R=
Answers
Explanation:
v = IR
v= 160 R = 2
160 = 2I
2 2
I = 80A
Balancing a centrifuge requires that all tubes in the load:
A. have an equal amount of liquid of the same viscosity.
B. are of equal size and shape.
C. have a partner directly across in the rotor holder.
D. All of the above
Answers
Every tube in the load must have a companion right across in the rotor holder in order for the centrifuge to be balanced.
In many laboratories, centrifuges are employed to separate fluids, gases, or liquids according to their densities. Centrifuges are often employed in clinical and research facilities for the purification of cells, organelles, viruses, proteins, and nucleic acids.
The separation of different components of whole blood using a centrifuge is an example of its usage in a clinical environment. Serum or plasma is required for several tests and can be obtained by centrifugation.
A full blood sample is allowed to clot at room temperature in order to get serum. The clot is subsequently removed from the sample by centrifugation, leaving a serum supernatant behind.
Plasma, in contrast to serum, is made from whole blood that has not been allowed to clot; it contains serum as well as clotting factors. A full blood sample is taken in tubes that have been anticoagulant-treated in order to get plasma.
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with a wound rotor induction motor the torque reaches maximum when the rotor and stator currents are ____ with each other.
In phase
Resistance
Reduced voltage
Answers
With a wound rotor induction motor, the torque reaches its maximum when the rotor and stator currents are in phase with each other. When the currents are in phase, it means that the rotor winding and the stator winding are perfectly aligned with respect to the magnetic field. This alignment results in the maximum torque production.
When the rotor and stator currents are in phase, the rotor winding creates a magnetic field that interacts efficiently with the stator winding's magnetic field. The resulting magnetic forces generate a maximum torque, allowing the motor to produce its highest rotational output.
On the other hand, if the rotor and stator currents are out of phase, such as when there is a phase shift or when reduced voltage is applied, the torque production decreases. This can occur when the rotor resistance is increased or when voltage is reduced using external control methods.
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when the production of a good generates negative externalities, ________.
Answers
1) Find out the equivalent resistance.
2) find out all the current's in every resistors.
3) find out the voltage in resistor 1 and 4.
Answers
Answer:
1) 2.388ohms
2) R1 3.36A
R2 1.682A
R3 2.88A
R4 2.16A The current has 5.048A over all
3) Voltage in R1 is 3.36v
Voltage in R4 is 8.63v
Explanation:
1. Each of the resistance R1 and R2 are in parallel in series combination with R3 and R4 so we calculate
R1 and R2 which is 1×2÷(1+2)= 0.6667ohms
R3 and R4 which is 3×4÷( 3+4)= 1.71ohms
so the equivalent resistance is 0.667+ 1.71= *2.377ohms*
2. The overall current = voltage source ÷ total resistance
= 12÷ 2.377= 5.048Amps
so current in every resistor will be
current in 1ohms will be (2÷3)×5.048= 3.36Amps
current in 2ohms will be (1÷3)×5.048= 1.68Amps
current in 3ohms will be (4÷7)×5.048= 2.88amps
current in 4ohms will be (3÷7)× 5.048= 2.16amps
3. voltage in R1 is 0.667ohms × 5.048amps= 3.36v
voltage in R4 is 1.71ohms × 5.048amps= 8.63v
The melting point of a pure compound is known to be 110-111°. Describe the melting behavior expected if this compound is contaminated with 5% of an impurity?
An impurity consisting of 5% total mass will lower the melting point from that of the pure compound, and it will increase the melting point range.A value of 103-107° would be consistent with this amount of impurity with the pure melting point of 110-111°; values of 100-105°, 97-100°, 102-110° are also good estimates.
Answers
Impurities will lower the melting point of a pure compound and increase the melting point range.
When an impurity is mixed with a pure substance, it lowers the melting point of the compound and expands its melting range. If a substance has a pure melting point of 110-111°C, adding a 5% impurity would cause the melting point to drop to 103-107°C, while the melting point range would broaden. It's difficult to predict the precise melting point range, but estimates such as 100-105°C, 97-100°C, and 102-110°C are all possible.
Impurities that are added to a substance have a noticeable effect on the melting point of the pure substance, which is used to evaluate the purity of the sample. The melting point of a compound is an important characteristic that chemists use to determine its identity and purity.
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Muốn đun sôi 200g nước từ 30 độ cần cung cấp nhiệt lượng bao nhiêu :
Answers
Answer:
cần cung cấp 70 độ vì nước sôi ở 100°C
Explanation:
A cold cranking rating indicates the lowest temperature At which a battery will operate normally. True or false?
Answers
The given statement "A cold cranking rating indicates the lowest temperature At which a battery will operate normally" is true.
Cold Cranking Rating (CCR) is defined as the discharge current in amperes at 0°C that a new, fully charged battery will deliver for 30 seconds and maintain a terminal voltage equal or higher than 1.2 volts per cell. It is a measure of the power available in cold temperatures for a lead-acid battery.The CCR of a battery is an essential measurement of its ability to start an engine in cold weather. In the winter months, the temperature can be harsh and prevent a battery from operating correctly. The battery can also lose some of its power if it isn't charged, and in colder weather, this can make it more difficult to start a vehicle.
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which of the following is the safest use of a life jacket or pfd?
Answers
The safest use of a life jacket or PFD (personal flotation device) is to wear it at all times when in or near water, especially when boating or swimming.
It should be properly fitted and adjusted to ensure a snug and comfortable fit. It is also important to choose the appropriate type of life jacket or PFD for the activity and water conditions.
It is recommended to always check the manufacturer's instructions for proper use and maintenance of the device. Additionally, it is important to regularly inspect and replace a life jacket or PFD if it shows signs of wear and tear or damage.
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Why can elastic band particles stay together
Answers
Answer:
The particles are held rigidly in place by all the other particles around them so they can't slip past one another or move apart. This gives solids a fixed shape and a fixed volume.
What conclusion can be drawn from the fact many of the best international players want to play in the NBA
Answers
Answer:
The NBA is a place the best players want to show off their talents at and possibly be very successful.
Explanation:
The players would like fame, the games, and fans that would cheer their name.
A piano has a mass of 99 kg. What is the weight of the piano?
Answers
Explanation:
weight of the piano = mg
w = 99 x 10 =990 N
please help is due for tomorrow please solve from the graph
Answers
Answer:
its constant
Explanation:
i think its 0
please answer!! If an object has a mass of 22.3 kg and is accelerating at 8 km/hr°2, what is its force? (Be sure
to label your answer.)
Answers
Answer:
49.06 Newtons
Explanation: Using Newton's Second Law of Physics, F=ma
the mass of the car is 22.3kg and the acceleration of the object is 2.2m/s^2 then you would multiply the two and get 49.06 Newtons. You want the acceleration to be in m/s^2
If m=120kg and a=15m/s2, what is the force
Answers
Answer:
F= 1800N
Explanation:
the equation for force is F= ma
so plug in the numbers: F= (120)(15)
solve this to get F= 1800N
tip: don't forget to add the units when writing your answer :)
A 400 kg spacecraft has a momentum of 30,000 kg m/s up. What is the velocity.
Answers
Answer:
75 - Please Give Brainliest
Explanation:
differentiate can you help me plzzzzzzz
Answers
Explanation:
Acceleration and the other term are the same physical phenomenon - just with opposite affects. Acceleration increases velocity, while the other term that begins with the letter "R" reduces.
***(Brainly's language filter is blocking the use of the second term in my answer.)***
Acceleration is defined as the rate of change of the velocity of an object per unit of time...
\(a = \frac{dv}{dt}\)
Acceleration would be a POSITIVE (+) quantity, while the r-word would be negative (-).
In many areas electricity is produced by huge generators close to dames. What function does a large volume of moving water have in generating electricity?
Answers
Answer:
To increase the volume of moving water, impoundments or dams are used to collect the water. An opening in the dam uses gravity to drop water down a pipe called a penstock. The moving water causes the turbine to spin, which causes magnets inside a generator to rotate and create electricity.
the extent of gender differences and their causes is controversial. which of the following arguments have been made in this debate?
Answers
The extent of gender differences and their causes are controversial. Gender differences are either nonexistent or small. (conclusion of research done by Hyde). Gender differences are extensive and due to evolutionary factors. (Buss suggest an evolutionary role in gender differences). Gender differences are exaggerated (conclusion of research done by Hyde). So option 4 is correct.
The following explanation as:
Gender differences are either nonexistent or small. This is the conclusion of research done by Janet Hyde, a psychologist who has conducted extensive meta-analyses of gender differences. She found that most gender differences are small in size and that they vary depending on the context.
Gender differences are extensive and due to evolutionary factors. This is the view of David Buss, a psychologist who has argued that gender differences are due to evolved psychological mechanisms that helped our ancestors survive and reproduce. He has identified a number of gender differences that he believes are due to evolution, such as differences in mate preferences, aggression, and risk-taking.
Gender differences are exaggerated. This is also the conclusion of Hyde's research. She found that many gender differences are overstated and that they are often based on stereotypes rather than actual data.
The debate about the extent of gender differences and their causes is complex and there is no easy answer. However, the research that has been done suggests that gender differences are real, but they are often small and exaggerated. The causes of gender differences are also complex and likely involve a combination of biological and environmental factors.
Therefore option 4 is correct.
Which of the following arguments have been made in this debate?
1. Gender differences are either nonexistent or small. (conclusion of research done by Hyde)
2. Gender differences are extensive and due to evolutionary factors. (Buss suggest an evolutionary role in gender differences)
3. Gender differences are exaggerated (conclusion of research done by Hyde)
4.all of these
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