a student is 2.50m away from a convex lens while her image is 1.80m from the lens, what is the focal length?
Answers
To find the focal length of a convex lens, we can use the formula:
1/f = 1/di + 1/do
Where f is the focal length, di is the distance of the image from the lens, and do is the distance of the object from the lens.
We are given that the student is 2.50m away from the lens, so do = 2.50m. We are also given that the image is 1.80m from the lens, so di = 1.80m.
Plugging these values into the formula, we get:
1/f = 1/1.80 + 1/2.50
Simplifying this equation, we get:
1/f = 0.5556
Multiplying both sides by f, we get:
f = 1.80 / 0.5556
Solving for f, we get:
f ≈ 3.24 meters
Therefore, the focal length of the convex lens is approximately 3.24 meters.
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A convex lens is 1.80 meters from a student who is 2.50 meters distant, and its focal length is 1.04 meters.
To solve this problem, we can use the lens equation:
1/f = 1/do + 1/di
where f is the focal length of the lens, do is the object distance (distance of the object from the lens), and di is the image distance (distance of the image from the lens).
In this problem, the object distance is do = 2.50 m and the image distance is di = 1.80 m. We can plug these values into the lens equation and solve for the focal length:
1/f = 1/do + 1/di
1/f = 1/2.50 + 1/1.80
1/f = 0.4 + 0.56
1/f = 0.96
f = 1/0.96
f ≈ 1.04 meters
Therefore, the focal length of the convex lens is approximately 1.04 meters.
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Related Questions
How does the wavelength of infrared compared with the wavelength of?
Answers
According to the electromagnetic spectrum, ultraviolet light has wavelengths from 10 nm to 400 nm and infrared light from 750 nm to 1 mm.
This means that infrared light has a longer wavelength than ultraviolet light.
We know the relation between wavelength and frequency as λ = c / f
where, λ is the wavelength
c is the speed of light
f is the frequency
The above equation tells us that frequency is inversely proportional to the wavelength. In other words, if the wavelength increases, frequency decreases.
As infrared light has a longer wavelength than ultraviolet light, infrared has a lower frequency than ultraviolet rays.
The question is incomplete. The complete question is how do the wavelength and frequency of infrared light compare to the wavelength and frequency of ultraviolet light?
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Which of the following is the best example of Newton's second law of motion?
A. A man leans against a wall and the wall exerts a force back on the man.
B. An asteroid moves through space at constant velocity.
C. A baseball bat strikes a baseball.
D. A woman is sitting on a chair.
Answers
Answer:
C. A baseball bat strikes a baseball.
Explanation:
Newton's second law of motion states that acceleration happens when force is applied on the mass.
A baseball bat strikes a baseball is the best example of Newton's second law of motion because acceleration of the baseball is directly proportional to the force by which baseball bat hit it.
Hence, the correct option is 'C. A baseball bat strikes a baseball.'
Answer:
Baseball bla
Explanation:
yes
what does it mean for a plate to subduct?
Answers
Answer:
what does it mean for a plate to subduct?
Explanation:
Subduction is a geological process in which the oceanic lithosphere is recycled into the Earth's mantle at convergent boundaries. Where the oceanic lithosphere of a tectonic plate converges with the less dense lithosphere of a second plate, the heavier plate dives beneath the second plate and sinks into the mantle.
At which position, A or B, is the potential energy of the swing the greatest? As the swing moves from point B to point A, which form of energy is increasing, kinetic or potential?
Answers
Answer:
a) Ua> Ub, b) Em = K + U
Explanation:
A swing is an oscillatory system, which goes from the highest point of the trajectory to the lowest point and then continues to the highest point on the other side, with a curved trajectory.
Suppose point A is the highest point and point A the lowest point, as the potential energy is given by the formula
U = m g h
if we define a reference system where the lowest point corresponds to y = or at this point the power energy is zero, therefore
Ua> Ub
in this movement the mechanical or total energy of the system remains constant, therefore it can be written
Em = K + U
therefore at the highest point the mechanical energy is only potential and at the lowest point it is only kinetic and at the intermediate points it has a part of each, but the value of the mechanical energy is constant and does not change.
Answer:
At which position, A or B, is the potential energy of the swing the greatest?
b
As the swing moves from point B to point A, which form of energy is increasing, kinetic or potential?
kinetic
Explanation:
Which of the following vehicles are accelerating? Select all that apply.
A: an SUV that is cruising north at a steady speed
B: a minivan that is parked in a driveway during a snowstorm
C: a race car that is rounding a sharp turn at a constant speed
Answers
The only vehicle that is accelerating is: C: a race car that is rounding a sharp turn at a constant speed.
Acceleration refers to a change in velocity, which can mean a change in speed or direction. In the case of option C, the race car is constantly changing its direction, so it is experiencing acceleration even though its speed remains constant.
Option A is cruising at a steady speed, so it is not accelerating.
Option B is parked and not moving, so it is not accelerating.
What is velocity?
Velocity is a physical quantity that describes the rate and direction of the motion of an object. It is a vector quantity, which means it has both magnitude and direction.
The magnitude of velocity is the speed of an object in a given direction. For example, if a car is traveling at a speed of 50 miles per hour (mph) in the north direction, its velocity is 50 mph north.
The direction of velocity is the direction in which the object is moving. It is usually specified as an angle relative to a reference axis or direction. In the example above, the direction of the car's velocity is north.
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a 50.7-kg crate of tools rests on a horizontal floor. you exert a gradually increasing horizontal push on it and observe that the crate just begins to move when your force exceeds 301 n . after that you must reduce your push to 226 n to keep it moving at a steady 29.6 cm/s. what would its acceleration be if you maintained the push in part c?
Answers
a) The push required to give the crate an acceleration of 1.13 m/s^2 is 360.476 N.
b) If we maintain the push of 231 N, the crate would slow down with an acceleration of 1.734 m/s^2 in the opposite direction.
a) To give the crate an acceleration of 1.13 m/s^2, we need to find the net force required.
The force required to overcome static friction and just start the crate moving is given by
F_static = friction coefficient × N
where N is the normal force exerted by the floor on the crate. Since the crate is on a horizontal floor, the normal force is equal to its weight
N = m×g
where m is the mass of the crate and g is the acceleration due to gravity.
N = 45.2 kg × 9.81 m/s^2 = 443.812 N
The force required to overcome static friction is
F_static = friction coefficient × N
We know that the force required to just start the crate moving is 310 N, so the friction coefficient is
friction coefficient = F_static / N = 310 N / 443.812 N = 0.698
Once the crate is moving, the force required to keep it moving at a constant speed is equal to the force of kinetic friction
F_kinetic = friction coefficient × N = 0.698 × 443.812 N = 309.4 N
To give the crate an acceleration of 1.13 m/s^2, we need a net force of
F_net = m×a = 45.2 kg × 1.13 m/s^2 = 51.076 N
So, the force required to give the crate an acceleration of 1.13 m/s^2 is
F_push = F_net + F_kinetic = 51.076 N + 309.4 N = 360.476 N
b) If we maintain the push at 231 N, the net force on the crate would be
F_net = F_push - F_kinetic = 231 N - 309.4 N = -78.4 N
The negative sign indicates that the net force is in the opposite direction to the motion of the crate, so it would slow down with an acceleration of
a = F_net / m = -78.4 N / 45.2 kg = -1.734 m/s^2
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The given question is incomplete, the complete question is:
A crate of 45.2-kg tools rests on a horizontal floor. You exert a gradually increasing horizontal push on it and observe that the crate just begins to move when your force exceeds 310N . After that you must reduce your push to 231N to keep it moving at a steady 25.2cm/s .
a) What push must you exert to give it an acceleration of 1.13m/s^2 ? b) What would its acceleration be if you maintained the push?
En una feria, se gana una jirafa de peluche lanzando una moneda a un platito, el cual está sobre una repisa más arriba del punto en que la moneda sale de la mano y a una distancia horizontal de 2.1 m desde ese punto (figura 3.41). Si lanza la moneda con velocidad de 6.4 m>s, a un ángulo de 60° sobre la horizontal, la moneda caerá en el platito. Ignore la resistencia del aire. A) ¿A qué altura está la repisa sobre el punto donde se lanza la moneda? B) ¿Qué componente vertical tiene la velocidad de la moneda justo antes de caer en el platito?
Answers
Answer:
A) La altura de la repisa sobre el punto donde se lanza la moneda es de aproximadamente 0,42 m
B) La velocidad de la moneda justo antes de que golpee el platillo es de aproximadamente 0,895 m/s hacia abajo
Explanation:
A) Los parámetros dados son;
La distancia horizontal del plato desde donde se lanza la moneda = 2,1 m
La velocidad con la que se lanza la moneda, u = 6,4 m / s
El ángulo al que se lanza la moneda, θ = 60 °
La componente horizontal de la velocidad, vₓ = 6.4 m / s × cos (60°) = 3.2 m/s
El tiempo que tarda la moneda en recorrer una distancia horizontal de 2,1 m, 't' se calcula de la siguiente manera;
t = 2,1 m/(3,2 m/s) = 0,65625 segundos
Por tanto, la altura de la moneda a 0,65625 segundos se da de la siguiente manera;
y = u × sin (θ) × t - (1/2) × g × t²
En t = 0,65625 segundos, obtenemos;
y = 6,4 × sin (60°) × 0,65625 - (1/2) × 9,81 × (0,65625) = 0,41840044589
La altura de la repisa sobre el punto donde se lanza la moneda, y ≈ 0.42 m
B) La velocidad vertical de la moneda justo antes de que golpee el platillo, \(v_y\), se da como sigue;
\(v_y\) = u × sin(θ) - g·t
∴ \(v_y\) = 6.4 × sin(60°) - 9.81 × 0.65625 ≈ -0.895
La velocidad de la moneda justo antes de golpear el platillo, \(v_y\) ≈ 0.895 m/s (hacia abajo)
A cheetah can run 113 km/h in short busts. How far can a cheetah run in 0.25 hours (15 minutes)?
Answers
What is the frequency of a light wave if its wavelength is 4.70 x 10-7 meters?
A. 1.57 x 10-15 Hz
B. 1.57 x 10-8 Hz
O
C. 6.32 x 107 HZ
O
D. 6.38 x 1014 Hz
Answers
Answer:
6.38 * 10^14 Hz
Explanation:
What is the difference between professional and casual communication styles?
Answers
Answer:
professional communication style is expected to be formal while the casual is informal.
Explanation:
what produces keratin that starts the death of skin cells
Answers
Answer:
Keratinocytes are the predominant cell type of epidermis and originate in the basal layer, produce keratin, and are responsible for the formation of the epidermal water barrier by making and secreting lipids.
Answer:
Keratinocytes, which are cells in the epidermis, produce keratin, which helps create a protective barrier on the skin's outer layer [1]. As the keratinocytes produce keratin, they start to die, leading to the death of the skin cells.
PLS ANSWER FAST WILL GIVE BRAINLY!!!
How can you know if something has energy?
Answers
Answer:
You'll see it without noticing
Explanation:
for example: Magnets can pull to one thing, but using the other side of the magnet with the other magnet can push away the magnets, and turn it to their way of pulling, also electricity, movement, were making energy everyday, just by moving
A negative test charge experiences a force to the right as a result of an electric field. Which is the best conclusion to draw based on this description?
a.The electric field points to the left because the force on a negative charge is opposite to the direction of the field.
b.The electric field points to the right because the force on a negative charge is in the same direction as the field.
c.No conclusion can be drawn because the sign of the charge creating the field is unknown.
d.No conclusion can be drawn because the amount of charge on the test charge is unknown.
Answers
OPTION B IS THE ANSWER
Answer:
The real answer is A 2023 answer -_-
Explanation:
which diagram represents diffraction of wavefronts as they encounter an obstacle?
Answers
The Huygens-Fresnel principle can be used to represent the diffraction of wavefronts as they encounter an obstacle.
When a wave encounters an obstacle or a narrow slit, the wavefronts bend around the edges, resulting in the phenomenon of diffraction. The Huygens-Fresnel principle states that each point on a wavefront can be considered as a source of secondary spherical wavelets. These wavelets combine to form a new wavefront, which represents the diffracted wave.
To illustrate this, a diagram often used shows a wavefront approaching an obstacle or a narrow slit. The wavefront is divided into smaller sections, and from each point on these sections, circular wavelets are emitted. These wavelets propagate and interfere with each other, leading to the formation of a new wavefront beyond the obstacle or slit.
This diagram visually demonstrates how wavefronts diffract when encountering an obstacle, based on the principles of the Huygens-Fresnel principle.
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According to this graph, the acceleration
is approximately:
Velocity (m/s)
1 2 3 4
Time t(s)
5
A. 4 m/s2
B. 2 m/s2
C. 1 m/s2
D. 3 m/s2
Answers
The acceleration is approximately 4 m/s². Therefore, the correct answer is:
A. 4 m/s²
To determine the acceleration from the graph, we need to look at how the velocity changes over time. Acceleration is defined as the rate of change of velocity with respect to time. In other words, it is the slope of the velocity-time graph.
Looking at the graph, we can see that the velocity changes from 0 m/s to 4 m/s over a time interval of 2 seconds. To calculate the acceleration, we use the formula:
Acceleration (a) = Change in velocity / Change in time
Acceleration (a) = (4 m/s - 0 m/s) / (2 s) = 4 m/s²
So, the acceleration is approximately 4 m/s². Therefore, the correct answer is:
A. 4 m/s²
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consider the circuit. find the equivalent resistance
Answers
Answer: 18 5.0 012
Explanation:
the pair of elements with the most similar chemical properties are
a. Na and F
b. O and Kr
c. Ne and Ar
d. Mg and Cl
Answers
c
(06.04 MC)
Which of the following best describes a human egg cell? (3 points)
Answers
Answer: A haploid cell formed in the female uterus
Two positive point charges q are placed on the x-axis, one at x = a and one at x = -a.
a. Derive an expression for the electric field at points on the x-axis, where ?a < x < a.
b. Derive an expression for the electric field at points on the x-axis, where x > a.
c. Derive an expression for the electric field at points on the x-axis, where x < -a.
Answers
The electric field at a point between 2 points is given by
E = 4 k Qax/(a² - x²)² (-i^)
The formula for the electric field at a location on the x-axis is,
E = k Q /r² ---(1)
where,
k is constant
q is magnitude of charge
r is the separation between the charge and the location of the electric field
So, we have to find the electric field at point (x,0) due to the both charges shown in the figure.
Due to point charge at point (-a,0) the electric field is in the positive x direction and due to charge at point (a,0) the electric field is in negative x direction.
E₁ be the electric field due to charge at point (-a,0)
E₂ be the electric field due to charge at point (a,0)
E₁ = k Q/(a + x)² i^
where the unit vector along the x-axis is i^
E₂ = k Q/(a - x)² (-i^)
E₁ + E₂ = k Q/(a + x)² i^ + k Q/(a - x)² (-i^) = -4 k Qax /(a² - x²)² i^
Thus, for a point between -a < x < a, electric field is given by E = 4 k Qax/(a² - x²)² (-i^)
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A 2-kg object is moving with a speed of 4 m/s. How much net force is required to keep the object moving at this velocity? What would be the objects acceleration? Explain.
20 points ??? ASAP PLEASE HELP
Answers
Answer:
Newton's second law states that the acceleration of an object is directly related to the net force and inversely related to its mass. Acceleration of an object depends on two things, force and mass. This shows that the bowling experiences a much greater force.
Explanation: that is the explanation
4. I have a mass of 500 kg. What force is needed to accelerate me at 1m/s2?
Answers
Answer:
Explanation: F = m * a F = 20 kg * 3 m/s 2 F = 60 N Newtons are a derived unit, equal to 1 kg-m/s². In other words, a single Newton is equal to the force needed to accelerate one kilogram one meter per second
after skiding down a snow-covered hill on an inner tube, ashley is coasting across a level snowfield at a constant velocity of 2.1 m/s. miranda runs after her at a velocity of 4.2 m/s and hops on the inner tube. how fast do the two of them slide across the snow together on the inner tube? ashley's mass is 53 kg, and miranda's is 68 kg. ignore the mass of the inner tube and any friction between the inner tube and the snow.
Answers
AHHSL GKAJGLARSKJSR;BL DBM,NTFSKB;AELH[AEBMF,;NBINKGKEAGLS[ HMOSGDFBTR HN;GAEGKPAEG A;BSMN
Ashley and Miranda slide across the snow together on the inner tube at a velocity of 3.27 m/s.
What is velocity?Velocity is the speed of an object in a particular direction. It describes the rate of change in position of an object, and is a vector quantity that includes both magnitude and direction.
To calculate the combined velocity of Ashley and Miranda, we need to use the equation for momentum. Momentum is equal to mass times velocity, so the equation is P = mv, where m is mass and v is velocity.
We can solve this equation for their combined velocity by adding the momentum of each person. Ashley has a mass of 53 kg and a velocity of 2.1 m/s, so her momentum is mv = 53 x 2.1 = 111.3 kg m/s. Miranda has a mass of 68 kg and a velocity of 4.2 m/s, so her momentum is mv = 68 x 4.2 = 284.6 kg m/s. Add these two momentums together to get the combined momentum of 395.9 kg m/s.
To find the velocity of the two combined on the inner tube, we can divide the combined momentum by the combined mass. The combined mass is 53 kg + 68 kg = 121 kg. Divide the combined momentum of 395.9 kg m/s by the combined mass of 121 kg to get the combined velocity of 3.27 m/s.
Therefore, Ashley and Miranda slide across the snow together on the inner tube at a velocity of 3.27 m/s.
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which of the following are properties of non-metals?
Answers
Answer:
Explanation:
no image?
no following of what ur talking about
no answer i can get?
Potential difference is measured in which units?
volts
amps
currents
watts
Answers
First option
Answer:
The correct answer is A volts on edge 2021
Explanation:
2. Rusting is an
example of a
a. physical property.
b. physical change.
C. chemical property.
d. chemical change.
Answers
Answer:
rusting is a chemical property because it is irreversible it changes the identity of a substance
Answer:
C. chemical property
Explanation:
a chemical property of iron is that it is capable of combining with oxygen to form iron oxide，the chemical name of rust
Can someone answer these questions
I’ll give you brainliest
1. How do YOU think a rocket/space shuttle goes into outer space
2. Newton had 3 laws about motion. Please look up his 3rd one and write it down here.
3. How is this law related to how a rocket/space shuttle goes into outer space
4. What was the purpose of the SpaceX Crew Dragon mission
5. Who were the 2 astronauts involved
6. Where was the spaceX Dragon going
7. Were the takeoff and landing successful
8. How might this mission help future space travel
Answers
Answer:
1. Following the recoil principle, rockets use combustion (a controlled explosion) to work against earth's gravitational attraction.
2. A force is a push or a pull that acts upon an object as a results of its interaction with another object. ... These two forces are called action and reaction forces and are the subject of Newton's third law of motion. Formally stated, Newton's third law is: For every action, there is an equal and opposite reaction.
(via physicsclassroom.com)
3. The combustion throws out material with very high momentum and is, physically speaking, the action. In reaction to that that, the rocket moves away from it (upward when in starts and has the action underneath it)
4. To show the world that commercial manned space missions are safely possible. Some may also like the fact that the US can now do, or rather order, manned flights into space without the help of the russian space agency (Roskosmos).
5. Robert Behnken and Douglas Hurley
6. The international space station (ISS)
7. Yes, Stage 1 of the rocket landed on the drone ship. The crew opened the hatch to enter the space station after 21 hours and 39 minutes after the launch from Cape Canaveral.
8. To have private contractors such as SpaceX actively in the field, there are now more interest groups that participate in space travel. And they can interact with other companies as well.
Also, due to Musks dream and efforts of SpaceX, space travel seems to get a lot cheaper.
That might indeed open the way back to the moon and further to the Mars for human space flight.
Governments such as the US planned on such things for decades, but changed plans ever since, and routinely changed leadership and the opinion on what's important.
Now Spaceflights can become less politically motivated and more commercially. That seems to be a more stable way over long periods of time.
(wrote most of it for you myself, even tough I'm not a native English speaker. would really appreciate the brainliest if you appreciate the work)
Answer:
yhgfty
Explanation:
cdfgv
please help! easy science! second pic is the question and possible answers (A B C or D) its one question! brainliest promised!
Answers
Answer:
Please do not take my word for this at all, but this is what I found, "When the pendulum swings back down, the potential energy is converted back into kinetic energy. At all times, the sum of potential and kinetic energy is constant." So I think the answer is B also you are anime fan too lol :DD I love hinata
Explanation:
What is kinetic energy?
What is potential energy?
Answers
potential energy is stored in an object.
Potential energy, stored energy that depends upon the relative position of various parts of a system. ... A spring has more potential energy when it is compressed or stretched. A steel ball has more potential energy raised above the ground than it has after falling to Earth.
All of the following are involved in carrying energy outward from a star's core except
A) convection.
B) radiative diffusion.
C) conduction.
D) neutrinos.
Answers
All of the options listed, A) convection, B) radiative diffusion, C) conduction, and D) neutrinos, are involved in carrying energy outward from a star's core. None of them can be excluded as they play important roles in the energy transfer processes.
In the process of energy transport from a star's core to its outer layers, multiple mechanisms are at work. Convection, which involves the movement of hot plasma due to density differences, contributes to carrying energy outward in certain regions of the star.
Radiative diffusion, on the other hand, involves the transfer of energy through the absorption and re-emission of photons by the stellar material, aiding in the energy transfer. Conduction, the process of energy transfer through direct particle-to-particle interactions, is also significant in certain layers of the star.
Additionally, neutrinos, though they have very weak interactions with matter, play a role in carrying energy out of the core of a star, particularly in high-density and high-temperature environments. Neutrinos are produced in nuclear reactions within the star's core and can escape without much interaction, carrying away energy.
Therefore, all of the options listed (convection, radiative diffusion, conduction, and neutrinos) are involved in carrying energy outward from a star's core, and none of them can be excluded from the energy transfer processes occurring within a star.
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Which waves are used in medicine?
______
A. Gamma and Microwaves
B. X rays and Gamma
C. X rays and Infrared
D. Radio waves and UltraViolet
Answers
Answer:
C
Explanation: