Answer: K.E = 0.4 J
Explanation:
Given that:
M = 1.0 kg
h = 0.04 m
K.E = ?
According to conservative of energy
K.E = P.E
K.E = mgh
K.E = 1 × 9.81 × 0.04
K.E = 0.3924 Joule
The kinetic energy of the pendulum at the lowest point is 0.39 Joule
Final answer:
The kinetic energy of the pendulum at the lowest point is 0.392 J, which is found by converting the initial gravitational potential energy into kinetic energy using the principle of conservation of energy.
Explanation:
To determine the kinetic energy of the pendulum at the lowest point, we use the principle of conservation of energy, which states that the total mechanical energy in a system remains constant if there is no friction.
We know that the pendulum starts with gravitational potential energy which is completely converted into kinetic energy at the lowest point. The potential energy (PE) at the starting point is due to its height above the lowest point and is calculated as PE = mgh where m is the mass, h is the height, while g is the acceleration brought on by gravity (9.8 m/s²).
Let's calculate the potential energy at the initial height:
PE = mgh
= (1.0 kg)(9.8 m/s²)(0.04 m)
= 0.392 J
Since there is no friction, this potential energy will be entirely converted into kinetic energy (KE) at the lowest point. Therefore, the kinetic energy at the lowest point is also 0.392 J.
what happens when light travels from one medium to another with a different index of refraction at a 0 degree angle of incidence?
Answer: light will travel in a straight line undeviated. Thus, there will be no refraction.
Explanation:
If the light hits the interface at angle equal to zero, then light movement is perpendicular to the plane of the second medium. And it will pass through undeviated. Therefore, the angle of refraction will also equal to zero. That is, there is no refraction.
Final answer:
Light entering a new medium at a 0 degree angle of incidence changes speed due to refraction but continues in a straight direction, and if it reflects, a 180° phase change occurs.
Explanation:
When light travels from one medium to another with a different index of refraction at an angle of incidence of 0 degrees, the light enters the new medium without changing its direction. This phenomenon is based on the principles of refraction, although at 0 degrees, the refraction is not visually evident since the light continues in a straight path. However, the speed of the light changes as it moves into the medium with a different refractive index. Moreover, if the light reflects from a medium with an index of refraction greater than that of the medium it is traveling from, a 180° phase change or a (lambda/2) shift occurs.
If the potential across two parallel plates, separated by 9.0 cm, is 12 volts, what is the electric field strength in volts per meter?
E = _____ volts/m
1.1
1.3
110
130
Answer:
Your answer is actualy going to be 130
Why do people have different centres of gravity?
What affects sounds at their source? MENTION DOPPLER EFFECT AND VIBRATIONS
Explanation:
: Doppler Effect works on both light and sound objects. For instance, when a sound object moves towards you, the frequency of the sound waves increases, leading to a higher pitch. Conversely, if it moves away from you, the frequency of the sound waves decreases and the pitch comes down.
Sounds at their source can be affected by various factors, including the Doppler effect and vibrations.
How this Numerous factors affect the properties of sound at its source
Vibrations:
The frequency of a sound dictates its pitch. The frequency and pitch of an object increase with its rate of vibration. Consider a guitar string that has been plucked quickly; this produces a higher frequency and higher-pitched sound.
Amplitude: This controls the sound's volume. The amplitude and loudness of the sound increase with the displacement of the vibrating object. Imagine pounding a drum more forcefully; the drum vibrates more, increasing the amplitude and producing a louder bang.
Form and composition of the oscillating object: The way that various materials and shapes vibrate affects the sound that is produced. For instance, the vibrations of a thin versus a thick drumhead will produce various sounds.
Force of excitation: Another important factor is how the object is made to vibrate. A soft pick versus a forceful strum is audible while picking a guitar string.
Doppler Effect:
This amazing phenomena varies the perceived pitch of a sound according on the listener's and the sound source's relative motion.
Moving source: Picture an ambulance driving toward you and sounding its siren. The siren seems to get louder as it approaches (you're really picking it on a higher frequency because the source is heading in your direction). On the other hand, it appears that the siren becomes quieter as the ambulance pulls away.
Listener in motion: A stationary sound source, such as a ringing bell, will sound louder in pitch if you run in that direction. The sound of the bell will become quieter as you run away from it.
These are but a few of the primary elements influencing sounds at the source. Recall that the intricate interaction of these elements creates the varied environment we encounter on a daily basis!
As an atom's nucleus gets larger the electric charges repelling the protons get larger. To compensate for this greater electric charge the atom.
A.) needs more neutrons to gain enough nuclear binding forces to overcome
the repulsion.
B.) needs fewer neutrons to gain enough nuclear binding forces to overcome
the repulsion.
C.)needs more electrons to gain enough nuclear binding forces to overcome
the repulsion.
D.)needs fewer electrons to gain enough nuclear binding forces to overcome
the repulsion.
Answer:
Option A needs more neutrons to gain enough nuclear binding forces to overcome the repulsion.Hope this answer helps.
Final answer:
As the number of protons in a nucleus increases, the nucleus requires more neutrons to stabilize the increased electrostatic repulsion between protons by increasing the nuclear binding force.
Explanation:
When an atom's nucleus gets larger with more protons, the electric charges repelling these protons also increase. To help stabilize the nucleus against this repulsion, it needs additional neutrons, which do not carry any electric charge, and provide additional nuclear binding forces to balance out the electrostatic repulsion between protons. The strong nuclear force between neutrons and protons is crucial to keep the nucleus intact, and it is stronger and shorter-ranged than the Coulomb force (electrostatic force) that causes repulsion between the positively charged protons.
Therefore, to compensate for the greater electric charge and maintain nuclear stability, an atom requires more neutrons, which adds to the nuclear binding force. This is most relevant for heavy nuclei, where neutrons greatly outnumber protons, to keep the repulsive forces at bay and the nucleus stable. For example, in heavier elements, stable isotopes typically have a greater number of neutrons than protons due to this requirement for a balanced nuclear force. In summary, the correct answer is:
A.) needs more neutrons to gain enough nuclear binding forces to overcome the repulsion.
Which statements correctly compare the meaning of the terms speed and velocity? Select all that apply.
A. Velocity is just a more scientific word for speed.
B. Both terms describe how fast an object is moving.
C. Only velocity also describes the direction of an object.
D. Only speed can be used if an object is moving at a constant rate.
E. Most of the time the terms can be used interchangeably.
Answer:
c
Explanation:
The top speed you will ever need to go in a parking lot is_
A. 20 mph
6. 10 mph
C. 1 mph
D. 15 mph
Answer:
D
Explanation:
answer is D
Final answer:
The safest speed to drive in a parking lot is 10 mph. This speed ensures the safety of pedestrians and allows drivers to react to unexpected obstacles.
Explanation:
The top speed you will ever need to go in a parking lot is 10 mph. Parking lots are areas with high pedestrian traffic including children and pets, making it critical to drive at a slow, safe speed. The recommended speed limit ensures everyone's safety and gives drivers enough time to react to unexpected events or obstacles. It's important to always stay alert, avoid distractions, and be ready to stop quickly while navigating through parking lots.
A space probe is being prepared for a deep-space mission. The engineers have divided the trip into five segments based on the required changes in motion, as noted in the table. During which parts of the trip must the engineers apply the principles of general relativity? (Note that the velocities are listed as a percentage of the speed of light, c. The direction is positive when moving away from Earth and negative when moving toward Earth.)
Planned Space Probe Mission
Trip segment Initial velocity (% c) Final velocity (% c)
A 0 +90
B +90 +90
C +90 -90
D -90 -90
E -90 0
A. Apply general relativity during segment B.
B. Apply general relativity during segment C.
C. Apply special relativity during segment A
D. Apply special relativity during segment E
General relativity involves accelerations (change in velocity), which occur in segments A, C, and E. The spacecraft is flying at a constant velocity (no acceleration) during segments B and D - special relativity would apply in these segments.
General relativity will be considered during the A, C and E part of the trip since the space probe will be accelerating then.
What is the theory of special relativity?The theory of special relativity is a theory which explains the relationships between speed, mass, time and space.
In special relativity, acceleration is not often considered
An example of special relativity is in time dilation.
General relativity applies to motion under gravity, and acceleration of objects are considered.
Therefore, general relativity will be considered during the A, C and E part of the trip since the space probe will be accelerating then.
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Different
______ of an element have different numbers of neutrons.
Answer: atoms
Explanation:
Which statement describes redshifts?
Redshifts occur when the light source and observer move farther apart, and the light observed shifts to a shorter wavelength.
Redshifts occur when the light source and observer move farther apart, and the light observed shifts to a longer wavelength.
Redshifts occur when the light source and observer move closer together, and the light observed shifts to a shorter wavelength.
Redshifts occur when the light source and observer move closer together, and the light observed shifts to a longer wavelength.
Answer:
B. Redshifts occur when the light source and observer move farther apart, and the light observed shifts to a longer wavelength.
Explanation:
Redshift is a phenomenon where electromagnetic radiation from an object undergoes an increase in wavelength such that the light seems to be shifted towards the red part of the spectrum. Redshifts are used to track the rotation of our galaxy by the astronomers. Redshifts occur when the light source and observer move farther apart, and the light observed shifts to a longer wavelength.
Answer:
B. Redshifts occur when the light source and observer move farther apart, and the light observed shifts to a longer wavelength.
Explanation:
on edg
Light waves travel most slowly through a ____
A) gas
B) solid
C) liquid
Answer:
Liquid
Explanation: It can't be gas because gases are all around us and we can still see light. For solids it can't even move through a solid. Ex: If you're in a solid dome made of rock you can't get any light through. Let me know if I'm right!
Answer:none of the Above
Explanation:Sound could travel through all matters but Nothing travels faster than light Energy
is muddy water a substance?
Answer: No, I wouldn't imagine so.
Explanation:
A satellite orbiting Earth at an orbital radius r has a velocity v. Which represents the velocity if the satellite is moved to an orbital radius of 5r?
A.15√v
B.15v
C.5√v
D.5v
A. IS THE CORRECT ANSWER!
Answer:
The correct answer is V√5
Explanation:
Let V be the velocity of the satellite orbiting at radius r.
Let V(5r) be the velocity of the satellite orbiting at radius 5r.
Recall:
Escape velocity is given by:
V = √(2gr)
Where V is the escape velocity
g is the acceleration due to gravity
r is the radius of the earth.
With the above equation, we can obtain the answer to the question as follow:
V = √(2gr)
V(5r) = √(2g5r)
Next, we'll obtained the ratio of V(5r) to V as shown below
V(5r) : V => V(5r)/V
V(5r)/V = √(2g5r) / √(2gr)
V(5r)/V = √5
Cross multiply
V(5r) = V√5
From the above illustration, we can see that when the satellite is moved to 3r, then the expression for the velocity will be V√5
The slope of a linear position-time graph tells us the _____ of the object.
a. speed
b. acceleration
Answer:
b. acceleration
Explanation:
The principle is that the slope of the line on a velocity-time graph reveals useful information about the acceleration of the object. If the acceleration is zero, then the slope is zero.
The slope of a linear position-time graph tells us the speed of the object. Option A
What is speed?
The rate at which an object's location varies over time is depicted by the slope of a linear position-time graph. The slope in the case of linear motion is the same as the object's speed. It offers details about the object's velocity, or how swiftly it is going.
On the other hand, acceleration describes the rate at which velocity changes. It is not directly connected to a position-time graph's slope. A velocity-time graph can be used to calculate acceleration by dividing the velocity change by the time change to get the slope of the graph.
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A constant force of 5.00 N acts on a 2.50 kg object for 10.0 s. What are the changes in the object’s momentum and velocity?
A constant force of 5.00 N acts on a 2.50 kg object for 10.0 s. The changes in the object’s momentum is 50 kg-m/sec and velocity 20 m/sec.
What is force?
A force is an effect that can alter an object's motion according to physics. An object with mass can change its velocity, or accelerate, as a result of a force. An obvious way to describe force is as a push or a pull. A force is a vector quantity since it has both magnitude and direction.
The acceleration of body,
a = 5/2.5
a = 2 m/sec²
change in velocity,
v - u = at = 2.10
change in velocity = 20 m/sec
change in momentum = 20. (2.50)
= 50 kg-m/sec.
A constant force of 5.00 N acts on a 2.50 kg object for 10.0 s. The changes in the object’s momentum is 50 kg-m/sec and velocity 20 m/sec.
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The change in the object's momentum is 50.0 kg·m/s, and the change in the object's velocity is 20.0 m/s.
To find the change in the object's momentum, we use the impulse-momentum theorem, which states that the impulse applied to an object is equal to the change in its momentum. Impulse is defined as the product of the force and the time interval over which the force is applied. Mathematically, this is expressed as:
[tex]\[ \text{Impulse} = \text{Force} \times \text{Time} \][/tex]
Given that the force (F) is 5.00 N and the time (t) is 10.0 s, we can calculate the impulse (I):
[tex]\[ I = F \times t = 5.00 \, \text{N} \times 10.0 \, \text{s} = 50.0 \, \text{N\·s} \][/tex]
Since 1 N = 1 kg·m/s², the impulse can also be written as:
[tex]\[ I = 50.0 \, \text{kg\·m/s}^2 \cdot \text{s} = 50.0 \, \text{kg\·m/s} \][/tex]
This impulse is the change in the object's momentum [tex][ \Delta p][/tex], so:
[tex]\[ \Delta p = I = 50.0 \, \text{kg\·m/s} \][/tex]
To find the change in the object's velocity [tex][ \Delta v][/tex], we use the definition of momentum (p), which is the product of mass (m) and velocity (v):
[tex]\[ p = m \times v \][/tex]
The change in momentum can also be expressed as:
[tex]\[ \Delta p = m \times \Delta v \][/tex]
We can solve for [tex][ \Delta v][/tex] by rearranging the equation:
[tex]\[ \Delta v = \frac{\Delta p}{m} \][/tex]
Given that the mass (m) of the object is 2.50 kg, we can calculate the change in velocity:
[tex]\[ \Delta v = \frac{50.0 \, \text{kg\·m/s}}{2.50 \, \text{kg}} = 20.0 \, \text{m/s} \][/tex]
Therefore, the change in the object's velocity is 20.0 m/s.
A doctor is trying to diagnose the cause of hearing loss in
four patients. She has recorded her notes from the patient
interviews in this chart.
Patient Interviews
Person
Information
Brody has a ringing in his ears since
going to a popular rock and roll
concert
Ashley was born in 1934 and cannot
hear quiet sounds
Keaton is a swimmer who suffers from
frequent ear infections
Brian
frequently cleans his ears with
a cotton swab, but everything
sounds muffled
which most likely describes the doctor's diagnoses for
each patient?
O Brody was exposed to harmful noise, Ashley's ears
have aged, Keaton has earwax buildup, and Brian has
bacteria in his ear.
O Brody's ears have aged, Ashley was exposed to
harmful noise, Keaton has earwax buildup, and Brian
has bacteria in his ear.
O Brody's ears have aged, Ashley was exposed to
harmful noise, Keaton has bacteria in his ear, and Brian
has earwax buildup.
O Brody was exposed to harmful noise, Ashley's ears
have aged, Keaton has bacteria in his ear, and Brian has
earwax buildup.
Final answer:
The doctor's likely diagnoses include harmful noise exposure for Brody leading to tinnitus, age-related hearing loss for Ashley, bacterial ear infections for swimmer Keaton, and earwax buildup for Brian due to improper ear cleaning methods.
Explanation:
The most likely diagnoses for each patient described based on their symptoms are as follows: Brody was exposed to harmful noise at the concert, which could have led to temporary or permanent hearing damage such as tinnitus. Ashley, having been born in 1934, is likely experiencing age-related hearing loss, also known as presbycusis, which often involves difficulty hearing higher-pitched sounds. Keaton, a swimmer who suffers from frequent ear infections, likely has bacteria in the ear causing conductive hearing loss. Brian, who frequently cleans his ears with a cotton swab and experiences muffled sounds, is likely suffering from earwax buildup that is impeding sound transmission.
A 2.9 kg model rocket accelerates at 15.3 m/s2 with a force of 44 N. Before launch, the model rocket was not moving. After the solid rocket engine ignited, hot gases were pushed out from the rocket engine nozzle and propelled the rocket toward the sky. Which of Newton’s laws apply in this example? Check all that apply.
the first law
the second law
the third law
the fourth law
the fifth law
Answer:
A the first law
B the second law
C the third law
Hope this helps you
Explanation:
Answer:
A, B, C
Explanation:
I just took the test
A moss begins to grow on a rock in an area that was previously uninhabited by life. This is an example of a:
-Pioneer species
-climax community
-Disturbance
-secondary succession
Answer:
Pioneer species
Explanation:
Pioneer is when someone does something that hasnt been donne before
A 75 kg bungee jumper jumps off with zero initial speed from a high cliff with a bungee cord tied to her ankle. At some time during the jump, the bungee cord starts stretching. The lowest point in her jump where the bungee cord is at maximum stretch is a total drop of 195 m . What is the elastic potential energy stored in the bungee cord at the instant she reaches this lowest point?
Answer:
The elastic potential energy PE=143.47kJ
Explanation:
This problem bothers on the potential energy stored in a material.
Given data
Mass of the bungee jumper
m= 75kg
Height of jump down the cliff h=195m
We know that the elastic potential energy stored is same as the potential energy of the bungee jumper
PE= 1/2kx²= mgh
Assuming g is 9.81m/s²
PE= 75*9.81*195
PE= 143471.25J
PE=143.47kJ
What is potential energy?
Potential energy is the energy possessed by a body by virtue of it position.
I really need help right now ASAP.
which two things affect how a lens refracts light
Answer:
The focal length, however, is a direct consequence of how much that lens refracts light, which (at least mostly) depends on two things: the index of refraction of that glass/plastic/whatever in the lens, and the curvature of the lens surfaces.
Explanation:
Final answer:
Understanding how lenses refract light involves considering the indices of refraction and the interaction with different mediums.
Explanation:
Lenses refract light based on two main factors: the indices of refraction of the lens material and the medium it interacts with. For example, when light enters a lens material with a higher refractive index, it bends towards the perpendicular, causing refraction.
What characteristic of waves caused the bridge to
collapse?
absorption, because the bridge absorbed all the energy
of the wind
diffraction, because the wind moved around the bridge,
which set the bridge into motion
O interference, because constructive interference occurred
when the wind frequency matched the natural frequency
of the bridge
interference, because destructive interference occurred
when the wind frequency matched the natural frequency
of the bridge
Answer: C. Interference, because constructive interference occurred when the wind frequency matched the natural frequency of the bridge.
Explanation:
Answer:
Its letter C
Explanation:
Which of the following facts about electromagnetic radiation has made it possible for scientists to gather information about Venus' rocky surface? A. Ultraviolet rays have wavelengths that are too short to be seen with the unaided eye. B. All light travels at the same speed through the vacuum of outer space. C. Infrared and radio waves can pass through very dense materials without interference. D. White light is made up of all the colors of the visible spectrum.
Answer:
C. Infrared and radio waves can pass through very dense materials without interference.
Explanation:
It was my study island question.
Answer:
C. Infrared and radio waves can pass through very dense materials without interference.
Explanation:
i just did it hope it helped
A fisherman notices that wave crests pass the bow of his anchored boat every 5.0 s. He measures the distance between two crests to be 12 m. How fast are the waves traveling
Answer:
may be 60m I think it's the correct answer
What happens to light when it passes through a lens?
A. Light reflects as it passes through the lens.
B. Light refracts as is passes through a lens.
C. Light diffuses as it passes through a lens.
D. Light scatters as it passes through a lens.
Answer:B the light refracts.
Explanation: a good example is an straw in a cup. When the light goes through the glass the straw looks broken an bigger
Opposite reaction of Air particles pushed outward against a balloon
Answer:
the balloon deflates
Explanation:
Answer: Balloons and Rockets
The air rushes out of the neck of the balloon. The action of the air rushing from the balloon pushes against the balloon, moving it in the opposite direction. When rocket fuel is burned, hot gases are produced. These gases expand rapidly and are forced out of the back of the rocket.
Please mark me as Brainliest
Explanation:
What do fire investigators begin their search with?
O A.
The suspect
OB.
The point of origin
OC. The place with the most damage
D.
There is no general starting point
Reset
bext
Fire investigators begin their search with the point of origin, which is the location where the fire started. This helps them determine the cause of the fire and they can do this by examining damage patterns and looking for ignition sources.
Explanation:In the process of investigating a fire, fire investigators typically begin their search with the point of origin. The point of origin is the location where the fire started. It is the most critical area in any fire investigation as it helps in determining the cause of the fire. Locating the point of origin involves carefully examining the fire scene, observing patterns of fire damage, and often working backwards from the areas of least damage towards the areas of most damage. Once the point of origin has been located, the investigators then look for sources of ignition, fuels, and any potential accelerants that may have contributed to the spread of the fire.
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The forces acting on the man are ______________ because there is __________, which makes a net force of ________.
unbalanced, no motion, 0N
balanced, motion, an indeterminable amount
unbalanced, motion, an indeterminable amount
balanced, no motion, 0N
Which of the following scenarios gives an example of velocity?
The train went at a speed of 100mph.
The hawk flew towards its prey at a speed of 10 miles per hour.
The quarterback threw the football 50mph to the right so that the receiver could catch it.
The bird flew north.
What is the equation for speed?
speed = mass x acceleration
speed = time/distance
speed = distance / time
speed = distance x time
Tony is a cyclist and likes to bike through the city of Columbus. He's waiting at a red light before he can move again. Tony is passed by his friend, Jonesy, who does not stop at the red light. Which is the best reference point for Tony to use to determine if something is in motion?
The SUV that is next to Tony at the red light.
His friend Jonesy, that did not stop at the red light.
A motorcyclist that is turning left at the green light.
The Capitol building at the corner.
What is the net force in this scenario?
450N to the left
450N to the right
0N to the right
900N to the right
Which of the following is NOT an example of fluid friction?
A penguin sliding on its belly on ice.
A kite soaring through the air.
A dog's jowls flapping in the air when its head is placed out the window of a moving car.
A shark swimming through the water.
What is the net force in this scenario?
Choose the statement below that is NOT true about the forces in this scenario.
The net force is 0N.
The net force is 10N.
There is no motion.
The forces are balanced.
The Great Pyramids: The ancient Egyptians built pyramids out of large blocks of limestone. No one knows for sure how they managed to move the blocks across land.One idea about how the Egyptians moved the stone blocks without modern machines is a simple one. As seen in the image below, the stone was pulled forward, the logs in back were picked up and placed in front of the block again. Which statement below best describes how the ancient Egyptians were able to move the blocks of limestone?
They used fluid friction to their advantage by placing logs under the limestone blocks.
The force needed to overcome rolling friction is much less than the force needed to overcome sliding friction.
The amount of gravity pulling on the blocks decreased as they were raised off of the ground by the logs.
They increased the number of people until they were able to provide a large enough force to overcome the static friction.
Which arrow best represents the direction of friction in this penguin moving to the left scenario?
up
right
down
left
Gravity works at a distance to _______ things together.
Distance and __________ are the 2 factors that determine the amount of gravity on two objects.
friction
weight
mass
velocity
What is Newton's 1st Law of Motion? Describe, in terms of Newton's 1st Law, what would happen if you are on a skateboard and hit a curb with your front wheels.
A lamp is sitting on a desk. Which of the following is true about the desk?
It is pushing up on the lamp.
It can affect the velocity of the book.
It is pulling down on the lamp.
It exerts no force on the lamp at all.
Ball A and Ball B are rolled so that they will collide. Does the data in the data table below demonstrate the law of conservation of momentum? Explain your reasoning.
Answer:
A,B,C
Explanation:
Answer:
a c b c a b a c c b
Explanation:
sorry dont know the rest can i get brainliest.
A cargo spacecraft has been launched to rendezvous with the International Space Station. The cargo ship must attain the same speed as the Space Station but maintain a distance of ten yards. As they orbit together, an arm from the Space Station will reach out the the cargo ship. Which oe of the four graphs represents the speed of the two objects as the orbit Earth?
A)
A
B)
B
C)
C
D)
D
Answer:
D
Explanation:
I did USA test prep a min ago
Which of the following means that an
image is real?
option B) [tex]+d_0}[/tex] means that the image is real based on the sign convention for image distance.
In the context of optical systems and lenses, the sign convention for image distance (d) is as follows:
Positive (+) image distance (d) indicates a real image.Negative (-) image distance (d) indicates a virtual image.So, in the given options:
A) [tex]-d_{i}[/tex]: Negative image distance, implying a virtual image.
B) [tex]+d_{0}[/tex]: The variable "l" is not defined, so it's unclear.
C) [tex]-d_{0}[/tex]: Negative image distance, implying a virtual image.
D) [tex]+d_{l}[/tex]: Positive image distance, indicating a real image.