What type of lens converges light to a focal point?.
Answers
The main function of a convex lens is to converge light, which makes it an important component in many optical systems.
The type of lens that converges light to a focal point is known as a convex lens. A convex lens is a lens that is thicker in the center than at the edges. It is also known as a converging lens or a positive lens.The image formed by a convex lens can be real, inverted and diminished, or virtual, upright and magnified.
When a convex lens is held up to light, it refracts the light rays passing through it, causing the rays to converge at a point known as the principal focus. The distance from the center of the lens to the principal focus is known as the focal length.A convex lens can be used in a variety of optical instruments, including cameras, microscopes, and telescopes.
The main function of a convex lens is to converge light, which makes it an important component in many optical systems.
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Related Questions
5. The Hall coefficient and conductivity of Cu at 400 K have been measured to be 0.45x10-10 m³/As and 6.5 /ohm-meter respectively. Calculate the drift mobility of the electrons in Cu.
Answers
The drift mobility of electrons in Cu is the ratio of the electric field to the charge carried by an electron and the time it takes for an electron to reach from one end of a conductor to the other under an applied electric field.
The Hall coefficient is defined as \(RH = (1/ne) * (dVH/dB)\) where n is the charge density, e is the charge of an electron, VH is the Hall voltage, and B is the magnetic field. To calculate the drift mobility of the electrons in Cu, we will first determine the charge density n using the Hall coefficient.
We can then use the conductivity and charge density to calculate the drift mobility. Given, Hall coefficient \(RH = 0.45 × 10^-10 m^3/A s\) and Conductivity \(σ = 6.5 /ohm\) meter at a temperature of 400K. (Magnetic field)
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Question 23 of 25 Which statement describes a question that can guide the design of a scientific investigation? A. It asks about a cause-and-effect relationship between two variables. B. It asks about how the observations will be organized. C. It asks about whether a controlled variable is necessary. OD. It asks about the preferred outcome of the investigation.
Answers
Scientific investigation asks about a cause-and-effect relationship between two variables. Thus, the correct answer is (a).
Scientific investigation is intended to create a hypothesis and demonstrate its validity or lack thereof. Experiments must be conducted in order to test these hypotheses, and these experiments are planned in accordance with the discovery of a cause-and-effect relationship between the two variables under scientific investigation. In these experiments, the "cause" is variable upto various degrees, and the "effect" of the variance is noted. The experimental design, which will try to manipulate the causes to see how these manipulations impact the second variable, will thus be guided by knowledge of the cause-and-effect connection.
Observations are frequently the first step in a scientific investigation.
An observation is something that is discovered using the senses of humans or tools and measurement technologies that support the senses of humans. Important scientific discoveries may result from unintentional observations.
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1. A science class is studying seeds. They plan to measure the length, height, and mass of different types of seeds. Which of these items should the class use to record their measurements as the class takes the measurements? *
A.camera
B.drawing
C.graph
D.data table
Answers
You can easily get rid of A and B because they don’t tell you a lot about your plant on their own. As for C you could use a graph but they’re only good at giving you two forms of data, which are usually dependent data and time and you need three forms of data. Finally a table can hold as many different data points as you need and because you need three it would be wise to use a table not a graph.
Practice It! Which of the following accurately describes how the availability of water affects a population? When this basic need is not met, population size will increase as organisms move to another area to meet their needs When this basic need is not met, organisms will adapt to the lack of water When this basic need is not met. organisms will simply die out and the species will become extinct. O When this basic need is not met, the population will decrease due to the death of organisms or the movement of organisms.
Answers
Answer:
When this basic need is not met, the population will decrease due to the death of organisms or the movement of organisms.
Explanation:
I believe this one is correct, I Hope it is for you God Bless :)
consider the game of ping-pong with the following states:. ' a: player l is hitting the ball. b: player 2 is hitting the ball. c: play is dead because 1 hit the ball out or in the net. d: play is dead because 2 hit the ball out or in the net.
Answers
Ping-pong involves four states: A, B, C, and D determine the game's flow and outcome: Player 1 hitting the ball, Player 2 hitting the ball, Player 1's error, and Player 2's error.
In the game of ping-pong, there are four possible states:
1. State A: Player 1 is hitting the ball.
2. State B: Player 2 is hitting the ball.
3. State C: The play is dead because Player 1 hit the ball out or into the net.
4. State D: The play is dead because Player 2 hit the ball out or into the net.
In State A, Player 1 has control of the ball and is actively hitting it toward Player 2. Player 2 must be prepared to receive the ball and return it back to Player 1. This state represents an ongoing rally where both players are engaged in the game.
In State B, Player 2 has taken control of the ball and is now hitting it back toward Player 1. Player 1, in turn, must be ready to receive the ball and continue the rally. State B is essentially a continuation of the game from State A, with the roles reversed.
In State C, the play is dead because Player 1 made an error by hitting the ball out of bounds or into the net. This means Player 2 earns a point and serves the ball to restart the game from State A.
Similarly, in State D, the play is dead because Player 2 made an error. Player 1 earns a point and takes the serve, restarting the game from State A.
To summarize, the game of ping-pong involves two players taking turns hitting the ball. The play can be ongoing, with each player alternating hits, or it can end if a player makes an error by hitting the ball out or into the net. In either case, the game restarts from State A.
Overall, the four states in the game of ping-pong represent the different phases of the game, indicating which player has control of the ball and whether the play is active or dead. Each state has its own implications and consequences for the progression of the game.
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when using the pass technique with a fire extinguisher, how far should you stand from the flames?
Answers
When using the PASS technique with a fire extinguisher, it is important to ensure you stand far enough away from the flames in order to be safe. As a general rule, it is best to stand at least 8-10 feet away from the fire.
This is to ensure that you do not come too close to the heat or flames and to also ensure you are not in danger of being burned. Additionally, standing further away provides you with better access to the fire in terms of directing the extinguisher towards the source of the fire. When spraying the fire, make sure you keep the nozzle pointed towards the base of the fire.
This will ensure you are able to put the fire out quickly and effectively. Lastly, if the fire is too large or close, back away and wait for the fire department to arrive.
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a device that sends out sound waves to detect objects is called
Answers
A device that sends out sound waves to detect objects is called sonar device.
What are sound waves?
Sound waves are vibrations of air molecules that propagate through a medium, such as air, water, or solid materials. Sound waves are created when a force, such as a vibrating object, causes particles in the medium to vibrate. The vibrations cause the particles to move in an alternating pattern, creating a wave. The frequency of the wave determines the pitch of the sound. The amplitude of the wave determines the loudness.
Sonar stands for Sound Navigation and Ranging. It is a device that sends out sound waves and measures their echo off objects in the environment to detect their position, size, shape, and other characteristics. Sonar is used for a variety of applications, such as navigation, tracking objects, and detecting underwater obstacles.
Therefore, sonar device is the correct answer.
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What is determined by the magnitude of intermolecular forces in a liquid and is a measure of a fluid's resistance to flow?.
Answers
The fluid's physical property that measures the fluid's resistance to flow is viscosity.
What is fluid viscosity?Fluid's viscosity is a physical property of fluids that measures the fluid's resistance to flow.
Fluid's viscosity decreases with increase in temperature and increases with increase in the intermolecular forces of the fluid.
Thus, the fluid's physical property that measures the fluid's resistance to flow is viscosity.
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What are some some examples of estimator variables (forensics)
Answers
Answer:
Estimator variables are those that cannot be controlled by the criminal justice system. They include simple factors like the lighting when the crime took place or the distance from which the witness saw the perpetrator.
Explanation:
why does a blue star and red star able to have the same luminosity??
Answers
If a reddish and a bluish star have the same luminosity, then the reddish star must be larger than the bluish star. This is again due to the Stefan-Boltzmann law; since the cooler, red star must have more surface area than a hot blue star to produce the same luminosity.
why do we believe 90 percent of the mass of the milky way is in the form of dark matter?
Answers
Answer:
The orbital speeds of stars far from the galactic center are surprisingly high, suggesting that these stars are feeling gravitational effects from unseen matter in the halo.
help
Democritus
Point out which contributions are present in the modern atomic model and which were eventually disproven and thus are not part of the modern model.
Answers
Democritus, an ancient Greek philosopher, made significant contributions to the concept of the atom. Some of his ideas are still relevant to the modern atomic model, while others have been disproven and are no longer part of our understanding.
Contributions present in the modern atomic model:
1. Atomism: Democritus proposed that all matter is composed of indivisible and indestructible particles called atoms. This idea forms the basis of the modern atomic theory, which acknowledges the existence of atoms as fundamental building blocks of matter.
Contributions disproven and not part of the modern model:
1. Indivisibility of atoms: Democritus believed that atoms were indivisible and could not be further divided. However, modern scientific discoveries have revealed that atoms are composed of subatomic particles such as protons, neutrons, and electrons.
2. Lack of experimental evidence: Democritus' atomic theory was primarily based on philosophical reasoning rather than empirical evidence. Modern atomic theory, in contrast, is supported by extensive experimental observations and scientific investigations.
While Democritus' idea of atoms as the fundamental units of matter aligns with the modern atomic model, his views on the indivisibility of atoms and the lack of experimental evidence have been refined and expanded upon through centuries of scientific advancements.
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the horse's center of gravity is not exactly in its middle; it is closer to its front hooves. what does this tell us about the force exerted by the front and back hooves at equilibrium?
Answers
At equilibrium, the forces exerted by the front and back hooves must be equal, but the force exerted by the front hooves will be slightly greater than that of the back hooves.
What is equilibrium?
Chemical equilibrium refers to the situation inside a chemical reaction where both the reactants are present at levels that have no further habit of changing over time, preventing any discernible change in the system's properties. Whenever the forward reaction and the reverse reaction move forward at the same speed, this condition results. The forward as well as backward reactions typically have equal, if not zero, reaction rates. The concentrations of a products and reactants do not change on a net basis as a result. Dynamic equilibrium is the name given to such a situation.
This is due to the fact that the horse's center of gravity is closer to the front hooves, and thus the front hooves must exert a greater force in order to keep the horse balanced.
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Do your calculations for the density of the copper cylinder and the copper wire agree with each other?
Answers
The densities of the copper cylinder and the copper wire do not agree with each other. They are different, indicating that the two objects have different densities.
To compare the densities of a copper cylinder and a copper wire, we need to calculate the densities of both objects and then compare the results.
The density of a material is defined as its mass per unit volume. Mathematically, it is expressed as:
Density = Mass / Volume
To calculate the density, we need the mass and volume of each object.
Let's assume we have the following data:
1. Copper Cylinder:
- Mass of the copper cylinder = 100 grams
- Volume of the copper cylinder = 50 cm³
2. Copper Wire:
- Mass of the copper wire = 75 grams
- Volume of the copper wire = 25 cm³
Now, let's calculate the densities of the copper cylinder and the copper wire.
Density of Copper Cylinder = Mass of Copper Cylinder / Volume of Copper Cylinder
= 100 grams / 50 cm³
= 2 grams/cm³
Density of Copper Wire = Mass of Copper Wire / Volume of Copper Wire
= 75 grams / 25 cm³
= 3 grams/cm³
From the calculations, we can see that the density of the copper cylinder is 2 grams/cm³, while the density of the copper wire is 3 grams/cm³.
Therefore, the densities of the copper cylinder and the copper wire do not agree with each other. They are different, indicating that the two objects have different densities.
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The ship is 1650 m from the cliff. The echo is heard 10 s later.
CALCULATE THE SPEED OF THE SOUND WAVE
Answers
Answer:
330m/s
Explanation:
v= total distance/ time
=3300/10
What equation links the resultant force with the change in momentum it produces
Answers
Answer:
its B
Explanation:
You need a specific force to change the momentum of something.
Hope this helps!
in which hearing test does the practitioner strike a tuning fork on a hard surface to produce a sound and places the tuning fork in the middle of the patient’s forehead to determine if the patient has conductive or sensorineural hearing loss?
Answers
The hearing test you are describing is called the Rinne test.
In this test, the practitioner strikes a tuning fork and places it on the mastoid bone behind the ear to produce a sound. The patient is asked to indicate when they can no longer hear the sound. The tuning fork is then quickly moved near the ear canal, and the patient is asked to indicate when they can no longer hear the sound.By comparing the duration of time during which the patient can hear the sound through the air (using the tuning fork near the ear canal) versus the duration of time during which the patient can hear the sound through bone conduction (using the tuning fork on the mastoid bone), the practitioner can determine if the patient has conductive or sensorineural hearing loss.To know more about sound visit:
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What two types of measurements make up density
Answers
Answer:
Mass and volume
Explanation:
Density is determined by two types of measurements mass and volume. The resulting density value is typically expressed in units such as grams per cubic centimeter (g/cm³) or kilograms per liter (kg/L).
Density is determined by two types of measurements:
Mass: Mass is the amount of matter present in an object. It is typically measured in units such as grams (g) or kilograms (kg).
Volume: Volume is the amount of space occupied by an object. It can be measured in units such as cubic centimeters (cm³) or liters (L).
To calculate density, you divide the mass of an object by its volume. The formula for density is:
Density (ρ) = Mass (m) / Volume (V)
The resulting density value is typically expressed in units such as grams per cubic centimeter (g/cm³) or kilograms per liter (kg/L).
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You did 100 j of work to move a 10 n object. How far did you move the object
Answers
\(w = fdcos( \alpha )\)
where w is the work done.where f is the force in newton.where d is the displacement.and a is the angle between the force and the displacement.\(w = fdcos(0)\)
\(100 = 10d \times 1\)
\( \frac{10d}{10} = \frac{100}{10} \)
\(displacement = 10 \: meters\)
Calculate the gravitational force between a 60kg woman and an 80kg man standing 10m apart. What if they are practically touching .3m between their centers?
Answers
The gravitational force between a 60kg woman and an 80kg man standing 10m apart is approximately 0.0392 N. When practically touching at 0.3m between their centers, the force increases to approximately 0.9807 N.
The force is 2.39x10^-8 N when they are 10m apart and 5.87N when they are practically touching. The gravitational force between two objects can be calculated using the formula:
F = G * (m1 * m2) / r^2
where F is the gravitational force, G is the gravitational constant (6.674 x 10^-11 N*m^2/kg^2), m1 and m2 are the masses of the objects, and r is the distance between their centers.
For the first scenario, where the woman and man are 10 m apart:
F = G * (m1 * m2) / r^2
F = (6.674 x 10^-11 N*m^2/kg^2) * (60 kg * 80 kg) / (10 m)^2
F = 2.39 x 10^-8 N
Therefore, the gravitational force between the woman and man is 2.39 x 10^-8 N when they are 10 m apart.
For the second scenario, where they are practically touching with a distance of 0.3 m between their centers:
F = G * (m1 * m2) / r^2
F = (6.674 x 10^-11 N*m^2/kg^2) * (60 kg * 80 kg) / (0.3 m)^2
F = 5.87 N
Therefore, the gravitational force between the woman and man is 5.87 N when they are practically touching with a distance of 0.3 m between their centers.
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You are in a car moving forward at 12 m/s. You throw a ball in the direction the car is moving. From your point of view, what does the ball do? what does the ball do from someone standing on the side of the roads view?
Answers
Answer: it goes the same speed as the car
Explanation:
Three 20W resistors are connected in series across a 120 V generator. What is the total resistance of the circuit and what current flows in the circuit?
Answers
The total resistance and current flowing through the circuit is equal to 60 Ohms and 2 Amperes respectively.
Given the following data:
Resistors = 20 Ohms.
Voltage = 120 Volts.
How to determine the total resistance.Since the three resistors are connected in series, we would calculate their total resistance by adding them up as follows:
RT = R1 + R2 + R3
RT = 20 + 20 + 20
RT = 60 Ohms.
Next, we would determine the current that is flowing through the circuit by applying Ohm's law.
From Ohm's law, we have:
V = IR
I = V/R
I = 120/60
I = 2 Amperes.
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Which country first put a manned spacecraft into orbit?.
Answers
The Soviet Union (now Russia) was the first country to put a manned spacecraft into orbit.
On April 12, 1961, Soviet cosmonaut Yuri Gagarin made history by becoming the first human to orbit the Earth aboard the Vostok 1 spacecraft. This groundbreaking achievement was a result of the Soviet space program's efforts to develop the necessary technology and launch capabilities.
Gagarin's successful orbit marked a significant milestone in space exploration and demonstrated the Soviet Union's prowess in the space race with the United States.
The mission not only showcased Soviet technological advancements but also symbolized a major leap forward in human exploration of space, inspiring future generations of astronauts and scientists worldwide.
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I need help with my homework please? I will give a lot of points and a brainlist.
Answers
#1
True
All metals attract magnets
#2
Yes true
Away from magnetic field if you place something it won't attract that
#3
False
Its only possible in case of electromagnetic force fields .
#4
False
Electromagnetic force field
#5
True
Which of the following bonds strength ranks in the correct order?
A. S-S < K-K < K-S
B. Mg-Mg < O-O < Mg-O
C. H-H < Ca-H < Ca-Ca
D. Na-Na < Na-Br < Br-Br
Answers
Answer:
the answer is A
Explanation:
The answer is A
The Choice in which the bond Strength ranks in the correct order is Choice A; S-S < K-K < K-S
According to the question;
We are required to determine in which choice Bond strength ranks in the correct order.The bond strength of a bond increases with increasing polarity of the bond.
Evidently, From the options above; In Choice A;
The polarity of S-S < K-K < K-S
As such, the bond strength which ranks in the correct order is Choice A: S-S < K-K < K-S
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Two sound waves produce a beat frequency of 5 hz. If one of the original frequencies is 227 hz, what could be the other frequency?.
Answers
The beat frequency is always equal to the difference in frequency between the two notes that interact to create the beats.
How do you find the beat frequency of two sounds?The absolute difference between the two waves can be used to compute it. As a result, here's how to determine the beat frequency of two waves: Take the absolute value by subtracting the first wave's frequency from the second wave's frequency.The total value of the two waves' frequencies' difference is equal to the beat frequency. Beat frequency is the number of beats per second that corresponds to the difference in two waves' frequencies.Beat Frequency Calculation is given:First wave frequency 5Hz
Second wave frequency 227Hz
Beat frequency 〰️222Hz.
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how do you measure the volume of irregular object? explain with diagram
Answers
Answer:
by using graphical meythod
What is the primary way that metamorphic rocks forms?
Answers
Answer:
where the rocks are exposed to really hot conditions and high pressure....these conditions are found deep where tectonic plates meet or deep inisde the earth past our core
hope this helps !!!!!
Answer:
high heat, high pressure, hot mineral-rich fluids or commonly a combination of these found deep in the Earth or where tectonic plates meet.
Explanation:
I hope this helps :3
based on experiment 1 and 2, the viscosity of SAE 30 motor oil at 25°C is closest to which of the following
Answers
Answer:
A. 30 cp. B. 60 cp. C. 200 cp. *D. 400 cp. 0
Answer:
It is 200 cp.
Explanation:
hope this helped!
A 25-W soldering iron runs on 110 V dc. What is its resistance?
a) 0.48 kohms
b) 4.4 ohms
c) 0.0020 ohms
d) 2.8 kohms
Answers
On 110 V dc, a 25-W soldering iron operates. R=484 denotes its resistance.
What does resistance mean in its simplest form?The Greek letter omega stands in for the ohm, a unit of resistance measurement. Georg Simon Ohm (1784–1854), a German physicist who investigated the connection between voltage, current, and resistance, is the name given to the unit of resistance.
We know that
V = P/I
Ohm's law, where P stands for power, V for external voltage, and I for internal current.
I = V/R
V = P(VR)
P=V²/R
The power is
P =25W
The potential being provided is
V = 110V
According to Ohm's law:
P = V²/R
R = V²/P
figuring out the resistance R's value as follows:
R = (110V)²/25W
R=484Ω
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