Answer:
8 meters
Explanation:
Frequency of waves = 5 waves / 4 s = 1.25 Hz
speed = frequency * wavelength
speed/ frequency = wavelength
10 / 1.25 = 8 m
List four conditions that may result in the emission of electrons from a conductor.
Answer:
1 Conditions that result in the emission of electrons from a conductor:
Heating the conductor to a suitable temperature
Exposing the conductor to a strong light
Subjecting the conductor to a very high applied voltage
Subjecting the conductor to high-speed electrons from another source
2 Both diodes and triodes influence current flow and contain electrodes. Diodes involve only two active pieces; triodes contain three electrodes within a tube. Current can flow through a diode in only one direction. Diodes tend to act as rectifiers. In a triode, the third electrode is a grid located between the cathode and the anode. A small difference of potential between the grid and the cathode controls the number of electrons that reach the anode. Adjusting the charge on the grid affects the number of electrons that can reach the anode. Triodes tend to act as amplifiers.
3 a Transmitting antenna
b Modulator
c Oscillator
d Microphone
4 a RF amplifier
b Receiving antenna
c Loudspeaker
d Demodulator
e Tuner
5 hue, saturation, intensity/brightness
6 red, blue, green
Explanation
PF right from PF all 6 answers
There are four main ways in which electrons are emitted from the conductor including Thermionic emission, Electric field electron emission, Photoelectric emission, and Secondary emission.
What is a conductor?A conductor is a substance or material which allows electricity to flow through it. In a conductor, the electrical charge carriers, usually electrons or ions or charged particles, move easily from one atom to another atom when the voltage is applied.
Thermionic emission involves large amount of external energy in the form of heat is supplied to release free electrons from the metal.
In the electric field electron emission, electrons are emitted from the metal surface when the metals are placed in a very strong electric field.
During photoelectric emission, light is absorbed by the metals and this provides energy to the valence electrons in the conductor which break their bond with the parent atom and which are then released from the atom.
Valence electrons have kinetic energy, however they don't have enough energy to escape from the atom. During secondary emission, a high-speed electron from the conductor is bombarded with an atom, which provides energy for the valence electrons to break their bonds with their parent atom which are then released from the atom.
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Two students are observing the motion of a Mercedes Benz. They calculate, with various handy dandy gadgets, that the Benz is changing its speed constantly by 2.2 m/s every second while moving along a straight road.
Student 1: The Benz is traveling at a constant velocity. Therefore at the end of 2 seconds it's speed will still be 2.2 m/s.
Student 2: No, the Benz is not traveling at constant velocity. At the end of two seconds the speed would have increased by 4.4 m/s.
Which student do you agree with and why? Discuss all parts of all statements made by both students. Saying I agree with student 1 or 2 or neither will not suffice.
Student 2 is correct. The Benz is not traveling at constant velocity. At the end of two seconds the speed would have increased by 4.4 m/s.
Final velocity of the Benz
The final velocity of the benz is determined by using first kinematic equation;
v = u + at
where;
u is the initial velocitya is the final velocity = (2.2 m/s) / 1s = 2.2 m/s²t is the timev = 2.2 + (2.2 x 2)
v = 6.6 m/s
Change in velocityΔv = 6.6 m/s - 2.2 m/s = 4.4 m/s
Thus, student 2 is correct. The Benz is not traveling at constant velocity. At the end of two seconds the speed would have increased by 4.4 m/s.
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What can spectroscopes tell us about a space object?
A. provide imagery
B. calculate location
C. determine temperature, chemical composition, and speed
D. determine temperature, chemical composition, and size
Answer:
The answer is C.
Explanation:
Spectroscopy can be very useful in helping scientists understand how an object like a black hole, neutron star, or active galaxy produces light, how fast it is moving, and what elements it is composed of.Answer:
[tex]\huge\boxed{\sf Option \ 3}[/tex]
Explanation:
Spectroscope:The device used to tell the properties of the spectral lines in an electromagnetic spectrum is called spectroscope. Properties of spectroscope:For any space object, spectroscope tells:Type of element the object is made of.Temperature of object.Chemical composition.SpeedMagnetic and electric field.Spectroscope also can tell the light intensity and their wavelength.[tex]\rule[225]{225}{2}[/tex]
Select the correct sentences on the image.
Matthew throws a ball straight up into the air. It rises for a period of time and then begins to drop. At which points in the ball's journey will
be the greatest force acting on the ball?
Answer:
when the ball falls down
Explanation:
because gravity is a very strong Force
Answer:
a
Explanation:a
What is the voltage in a cirucit with a current of 3.0 amps and a resistance of 2.0 Ohms?
Answer:
6 v
Explanation:
V = IR
= 3 A * 2 ohm = 6 v
is space expanding within clusters of galaxies? why or why not?
No, since their gravity is powerful enough to keep them together even while the universe expands as a whole. Space is not expanding within clusters of galaxies.
What is a galaxy?A galaxy is a massive clump of gas, dust, and billions of stars and their solar systems bound together by gravity.
No, since their gravity is powerful enough to keep them together even while the universe expands as an entire.
Hence,space is not expanding within clusters of galaxies.
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Make the following conversion:
A) 60∘C into F
B)70∘C into K
C) 303∘K into C
D) 140∘F into C
If you don't know what I mean by C, F, K and ∘ it meaning is:
C- Celsius
F- Fahrenheit
K- kelvin
∘- degree sign
Answer:
Kelvin to Celsius: C = K - 273 (C = K - 273.15 if you want to
Which type of radiation is associated with high frequency waves?
Answer:
Gamma rays
Explanation:
have the highest energies, the shortest wavelengths, and the highest frequencies. Radio waves, on the other hand, have the lowest energies, longest wavelengths, and lowest frequencies of any type of EM radiation.
[tex] \large\textbf{Question } [/tex]~
[tex] \textsf{How many images will be formed when two plane } [/tex][tex] \textsf{mirrors are inclined on each other by an angle of 60° ?} [/tex]
[tex] \texttt{[ Need explanation ]} [/tex]
[tex] \bold{\underline{\underline{\underbrace{Answer}}}} [/tex]
5 images
Explanation:
⠀
⠀
⠀⠀⠀⠀▦ NoteWhat is reflection of light?
The reflection of light is the phenomenon in which the rays of light falls on the object and change it's path.
⠀
How image is formed in plane mirror?
When you look at the mirror the image is formed behind the mirror and it is virtual. The light from the object which reaches the mirror gets reflected back.
⠀
⠀
⠀⠀⠀⠀SolutionThe formula to find the no. of images between the 2 plane mirror at any angle θ.
[tex] \sf No. \: of \: images = \frac{360 \degree}{ \theta} - 1[/tex]
According to the question the plane mirror is inclined at 60° angle.
Substituting the required values.
[tex] \sf \large \frac{ \cancel{360} \small \: \: 6}{ \cancel{60}} - 1 \\ \\ \sf \large 6 - 1 \\ \\ \boxed{ \frak{ \implies 5} }[/tex]
The 2 plane mirror will form 5 images inclined at 60° angle.
Two coherent sources of light are three
wavelengths out of phase. does light from these
sources experience constructive interference,
destructive interference, or no interference at all?
explain how you know.
Answer:
The difference phase = 3 λ
In terms of wavelength the difference of phase is zero so the sources would experience "constructive" interphase at that point.
If the light from the sources differed by 1/2, 3/2, 5/2 wavelengths etc, then the sources would be out of phase at that point.
The four fundamental forces are c. strong force, weak force, electromagnetic force, gravity. b. nuclear force, gravity, tidal force, magnetic force. d. nuclear force, electromagnetic force, gravity, tidal force. a. strong force, weak force, electric force, magnetic force.
Answer:
The statements that describe the relationship between history and geography are:
Geography is the setting of the history's story.
Geography plays a role in historic events.
History affects geography, and geography influences history.
The second, third, and the fifth statements are the correct answers.
Explanation:
first 1=2=5=3=0=5=8=7=x=y
What are the basic ingredients needed to form a hurricane? (Select all that apply.)
Question 1 options:
warm water
moist air
high pressure
strong winds that come together from different directions
strong winds that come together from different directions
Two rocks, A and B, are thrown horizontally from the top of a cliff. Rock A has an initial speed of 10 meters per second and rock B has an initial speed of 20 meters per second. How would you describe the time it takes for the rocks to reach the ground and the horizontal distance they travel?
Answer:
i need help
Explanation:
Line segment gj is a diameter of circle l. angle k measures (4x 6)°. circle l is inscribed with triangle g j k. line segment g j is a diameter. line segments g k and k j are secants. angle k has a measure of (4 x 6) degrees. what is the value of x? 21 24 32 44
The value of x in the given right triangle in a semicircle is determined as 21.
What is the measure of a triangle in a semicircle?The triangle in a semicircle is always a right angle triangle.
From the figure shown, we can say that the triangle G J K is right triangle and m<K = 90degrees.
Given that m<K = 4x + 6, we will can use the following equation to find the value of x as shown:
4x + 6 = 90
4x = 90 - 6
4x = 84
x = 21
Thus, the value of x in the given right triangle in a semicircle is determined as 21.
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IF THE CAPACITOR HAS PLATE AREA OF 0.2m² AND DISTANCE BETWEEN THEM IS 0.04 m. What is the capacitance if dielectric constant is E=0.001 C/VM.
please i need it hurry if correct mark u brainliest.please hurry.
[tex]\\ \rm\Rrightarrow C=\dfrac{\epsilon_oA}{d}[/tex]
[tex]\\ \rm\Rrightarrow C=\dfrac{0.2(0.001)}{0.04}[/tex]
[tex]\\ \rm\Rrightarrow C=\dfrac{0.0002}{0.04}[/tex]
[tex]\\ \rm\Rrightarrow C=0.005F[/tex]
[tex]\\ \rm\Rrightarrow C=5mF[/tex]
Explanation:
Given data :
Given data :Plate area = 0.2m^2
Given data :Plate area = 0.2m^2Distance between plates=0.04m
Given data :Plate area = 0.2m^2Distance between plates=0.04mdielectric constant = 0.001 C/vm
Given data :Plate area = 0.2m^2Distance between plates=0.04mdielectric constant = 0.001 C/vmRTF=Capacitance.
Given data :Plate area = 0.2m^2Distance between plates=0.04mdielectric constant = 0.001 C/vmRTF=Capacitance. SolutionGiven data :Plate area = 0.2m^2Distance between plates=0.04mdielectric constant = 0.001 C/vmRTF=Capacitance. SolutionFirst formula for capacitance .
C= E A/ DC= 0.001 × 0.2 0.04C = 0.0002 0.04C = 0.005 FC = 5mF
Fill in the blanks in the following paragraph to correctly identify phenomena that help provide evidence for the particle nature of light
An electron absorbs energy and emits electromagnetic radiation based on its transition.
What is an Electron?This is defined as a sub-atomic particle which has a negative charge. It's involved in a chemical reaction which results in the formation of new substances.
Classical physics predicted that at a high enough temperature, ultraviolet light would be emitted. instead white light was emitted resulting in the ultraviolet radiation.
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Two charged plates separated by 15 cm create a uniform electric field of 360 n/c. what is the potential difference between the plates?
When two charged plates are separated by a distance, the potential difference between the plates is 54 Volts.
What is uniform electric field?The electric field intensity which does not increase or decrease with time or remain constant is called the uniform electric field.
Given is the plates separated by distance d = 15 cm =0.15 m, electric field E= 360 N/C.
The relation between the electric field and voltage is
E=V/d
Substitute the values into the expression to get the potential difference V,
V = 360 x 0.15
V = 54 Volts
Thus, the potential difference between the plates is 54 Volts.
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What might you look for as evidence that fusion occurs inside a star?
Answer: neutrinos
Explanation:
Match each space mission with the correct milestone.
1. first animal in space
Apollo 11
2. first person in space
Sputnik 2
3. first person on the moon
Salyut
4. first man-made object in space
Vostok 1
5. first American in space
Sputnik 1
6. first space station
Freedom 7
Matching each space mission with the correct milestone
First animal in space ____________ Sputnik 2first person in space ____________ Vostok 1first person on the moon _________ Apollo 11first man-made object in space ____ Sputnik 1first American in space __________ Freedom 7 first space station ______________ SalyutMeaning of space missionA space mission is a mission that takes an individual, animal, a thing or material out of earth using a spaceship. This mission is always carried out with a desire to find out more about the galaxy earth is a member of and to learn about other planets.
In conclusion, the list above is the accurate Matching of each space mission with the correct milestone.
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Answer:
See attachment below, Hope it helps!
Adrian plays basketball with Kevin on a basketball court that is completely level. After Adrian makes as basket, their ball rolls to a complete stop. what forces acted on the ball to cause it to stop rolling?
A. acceleration and gravity
B. friction and acceleration
C. gravity and friction
D. magnetic forces and friction
What type of monomers make up liquids
Answer:
Carbohydrates - monosaccharides.
Lipids - glycerol and fatty acids.
Nucleic acids - nucleotides.
Proteins - amino acids.
Explanation:
Describe the electric and magnetic fields of an electromagnetic wave.
What are the functions of the respiratory system?
Answer:
- Allows you to talk and to smell.
- Warms air to match your body temperature and moisturizes it to the humidity level your body needs.
- Delivers oxygen to the cells in your body.
- Removes waste gases, including carbon dioxide, from the body when you exhale.
- Protects your airways from harmful substances and irritants
A force applied to a spring compresses the spring 11 cm, storing a certain amount of elastic potential energy. Then a larger force is applied to compress the spring a total of 66 cm. How does the elastic potential energy stored in the spring after it is compressed 66 cm compare to the elastic potential energy stored in the spring after it was compressed 11 cm
Let k be the spring constant.
• When the spring is compressed by 11 cm = 0.11 m, it stores
1/2 k (0.11 m)²
of potential energy.
• When it's compressed by 66 cm = 0.66 m, it stores
1/2 k (0.66 m)²
of potential energy.
Then the ratio of these potential energies is
(1/2 k (0.66 m)²) / (1/2 k (0.11 m)²) = 36
which is to say, the spring stores 36 times more energy when it's compressed by 66 cm compared to 11 cm.
A generator is operating with 5% droop primary control. The generator is rated for 100 kW. Its secondary power command at this point in time (in other words, the power commanded to produce at 60 Hz) is 67 kW. The grid frequency is currently 59.9 Hz. What is the generator power
The generator power will be 59 kW. Power drop is the main factor for finding the generated power.
What is the power rating?The maximum power input allowed to pass through a piece of equipment is known as the equipment's power rating.
Power drop = 5%
The relation of the frequency change with the power drop is;
[tex]\rm \frac{df}{dp} =5\%\\\\ \frac{f_{rated-f_1}}{P_{rated}-P_1}=0.05\\\\ \frac{f_{rated-60}}{100-61}=0.05\\\\ f_{rated}=61.95[/tex]
For the grid frequency, 59.9 Hz
[tex]\rm \frac{f_{rated-f_2}}{P_{rated}-P_2}=0.05[/tex]
[tex]\rm \frac{61.95-f_2}}{100-P_2} =0.05\\\\ 100-P_2 =20(61.95-59.9)\\\\P_2=100-41 \\\\ P_2=59 \ kW[/tex]
Hence, the generator power will be 59 kW.
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Which of the following is an example of kin selection? A. A wolf attacks its cousin over territorial rights. B. A snake eats the eggs of another snake. C. A badger attacks a bear who was foraging for food. D. A bobcat fights a wolf to protect younger bobcats.
Answer: D. A bobcat fights a wolf to protect younger bobcats.
Explore the role of friction when creating safety ramps and escalators. "Why is it important for people and object to move slowly on ramps and escalator?
The role of friction is of great importance when creating safety ramps and escalators because with the help of friction things move.
Why is it important to move objects slowly on ramps and escalator?It is important to move objects slowly on ramps and escalator because the ramps and escalator moves object in the opposite direction of gravity. If we did not move objects slowly, then the objects or a person get damaged.
So we can conclude that the role of friction is of great importance when creating safety ramps and escalators because with the help of friction things move.
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HELP PLEASE
Which is true about the price of sustainable buildings?
It is generally less expensive over the lifetime of the building, due to lower energy costs in production of the materials and lower energy bills,
It is almost always less expensive upfront because insulation is so inexpensive.
It is almost always more expensive, but businesses choose to construct them anyway because climate change is a priority for them.
It is generally more expensive over the lifetime of the building, which is an issue that should be weighed in a cost-benefit analysis.
Sustainable buildings are generally less expensive over the lifetime of the building, due to lower energy costs in production of the materials and lower energy bills. Option A is correct.
What is sustainable buildings?Sustainable buildings refer to both a structure and the implementation of environmentally responsible and resource-efficient methods.
Sustainable buildings are generally less expensive over the lifetime of the building, due to lower energy costs in production of the materials and lower energy bills,
Hence,option A is correct.
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How would a parachute fall on the surface of the moon ? Describe. The mass of the Jupiter is
[tex]19 \times 10 ^{27} kg[/tex]
and that of the sun is
[tex]2 \times 10 ^{30} kg[/tex]
If the gravitational force acting between them is
[tex]4.166 \times 10 ^{23} newton[/tex]
calculate the distance between their centres.
Explanation:
the answer is 2.46 × 10^12
what is importance of powder painting?
Answer:
It provides a more durable finish than liquid paints can offer, while still providing an attractive finish