Answer:
In projectile motion, the velocity along the x-axis is constant.
Explanation:
In case of projectile motion the vertical component of particle's velocity changes continuously because of the force acting in vertical direction which is its own weight.
But in the horizontal direction as there is no force acting on the object; therefore its horizontal velocity remains constant.
over 10 seconds, a train accelerates constantly from rest at a rate 3 m/s2. how far does the train travel during this time period.
Over 10 seconds, a train accelerates constantly from rest at a rate 3 m/s². The distance covered by the train is 150 m.
Let us assume that, the distance covered by the train is s.
It is given that,
Time of travel, t = 10s.
The acceleration of the train, a = 3 m/s².
The initial velocity of the train, u = 0.
It is known that, [tex]s=ut+\frac{1}{2}at^2[/tex].
[tex]\Rightarrow s=[(0)(10)+\frac{1}{2}(3)(10)^2]m\\\Rightarrow s=[0+\frac{1}{2}\times3\times100]m[/tex]
⇒ s = (1/2) × 300 m
⇒ s = 150 m
Hence, the distance covered by the train is 150 m.
Learn more about the Velocity here: brainly.com/question/80295
#SPJ4
When braking hard in a straight line most of the weight of the vehicle will shift onto the: mark 1 answer a. front wheels b. right wheels c. left wheels
d. rear wheels
Braking hard in a straight line can be a tricky maneuver, but understanding the weight distribution of the vehicle is key. When braking hard in a straight line, most of the weight of the vehicle will shift onto the front wheels so option a is correct..
This is because the front of the car experiences more friction when braking, while the rear of the car remains relatively stationary. This shift of weight causes the car to decelerate more quickly, and also helps the car to stay balanced and remain in a straight line. The left and right wheels will experience an equal amount of weight during hard braking, as the weight is distributed evenly across the front of the car.
To learn more about weight, visit:
https://brainly.com/question/13178675#
#SPJ11
hree thin rods of length l are arranged in an inverted u. the two rods on the arms of the u each have mass m; the third rod has mass 3m. where is the center of mass of the assembly?
The y coordinate of the center of mass of the system is located at L/5. In this system, the two rods on the arms of u each have a mass of m; the third rod has a mass of 3m.
Substitute 0 for x₁, L/2 for x₂, and L for x₃ in the equation
Xcom = Mx₁+(3M)x₂+Mx₃/M+3M+M
Xcom = M(0)+(3M)(L/2)+M(L) / M+3M+M
= 5ML/2(5M)
= L/2
Therefore, the x coordinate of the center of mass of the system is located at L/2.
Similarly, substitute -L/2 for y₁, 0 for y₂, and -L/2 for y₃ in the equation,
Ycom = My₁+(3M)y₂+My₃ / M+3M+M,
Ycom = M(-L/2)+(3M)(0)+M(-L/2) / M+3M+M
= -ML/5ML
= -L/5
The negative sign highlights the fact that the point is in the downward direction relative to the origin. Therefore, the y coordinate of the center of mass of the system is located at L/5.
To learn more about the center of mass visit here:
https://brainly.com/question/28021242
#SPJ4
Markus combines 500 mL water at 50 °C and 500 mL water at 30 °C.
Then he puts them on the stove. What temperature will they boil
at?
a. 50 °C
b.
40 °C
80 °C
C.
O
d. 100 °C
Convection occurs while an egg cooks in a pot on a stove.Stove → Pot = conduction, Pot → Egg = convection. 50 °C
Explain the Convection ?Radiation, conduction, and convection heat transfer are the three methods by which heat is transmitted from one medium to another.Heat is transported by the process of radiation by way of electromagnetic emissions.Conduction heat transfer is the method through which heat is transferred between two bodies that are in contact with one another.The type of heat transmission that occurs through gases is convection heat transfer.Conduction heat transmission occurs when the heat from the stove contacts the pot.The gas from the water facilitates convective heat transmission once the water has been heated.To learn more about Convection refer
https://brainly.com/question/20264972
#SPJ1
consider relating this to heidegger's notion of bringing forth. does our dealing with science and technology bring forth to goodlife?
As per Heidegger's notion, the relationship between science, technology, and the good life is complex and multifaceted. While these advancements have brought forth many benefits, it is important to consider the potential consequences of our engagement with science and technology and to strive towards a balanced and responsible use of these tools.
Martin Heidegger's notion of "bringing forth" refers to the way in which human beings actively shape the world through their engagement with technology and the natural world. He argues that our relationship with technology and science can both reveal and conceal the nature of the world, and that this relationship can have significant implications for human life and well-being.
In considering the impact of science and technology on the good life, it is important to examine both the benefits and the potential negative consequences of these advancements. On the one hand, science and technology have undoubtedly brought forth many improvements in our standard of living, such as medical advancements, access to information, and increased efficiency and convenience in many aspects of life.
On the other hand, some have argued that our growing reliance on technology can lead to a loss of authenticity and meaningful engagement with the world. Additionally, there are concerns about the environmental impacts of science and technology, as well as the potential for technology to perpetuate inequalities and reinforce oppressive power structures.
Learn more about science here:
https://brainly.com/question/14074768
#SPJ4
a long, straight uniformly charged wire has a net charge per unit length of 2.58 coulombs/meter. what is the magnitude of the electric force in newtons exerted by this wire on a proton that is located a perpendicular distance 6.09 meters away from the wire?
The magnitude of the electric force in newtons exerted by this wire on a proton is 5.99 x 10¹⁰ N.
What is the magnitude of the electric force?
The magnitude of the electric force in newtons exerted by this wire on a proton that is located a perpendicular distance 6.09 meters away from the wire is calculated as follows;
F = Eq
where;
E is the electric field strengthq is the chargeF = ( kq² ) / r
where;
k is coulombs' constantr is the position of the chargeF = ( 9 x 10⁹ x ( 2.58 x 6.09 )² ) / ( 6.09² )
F = 5.99 x 10¹⁰ N
Thus, the electric force exerted by the charge is a function of the charge magnitude and the distance of the charge.
Learn more about electric force here: https://brainly.com/question/17692887
#SPJ1
1. If a 5 tons beam is raised 6 meters, what is it's potential energy? If it is raised another 8 meters in 6 seconds, what is the work done?
If a 5 tons beam is raised 6 meters, then its potential energy is 294kJ and if it is raised another 8 meters in 6 seconds, the work done is 392kJ
Given the weight of beam(m) = 5tons
The height the beam raised (h) = 6m
We know that potential energy is equal to the weigh raised to a certain height such that PE = mgh where g is the gravitational acceleration.
We know that an object can store energy depending on its position. When a bow and arrow are employed, the kinetic energy of the arrow is provided by the energy accumulated when the bow is drawn.
PE = 5 x 1000 x 9.8 x 6 = 294000J = 294kJ (1 ton = 1000kg)
Hence the potential energy required is 294kJ
In the other case the height the beam raised = 8m
Time taken to raise = 6s.
But potential energy is irrelevant to time. So,
PE = 5000 x 9.8 x 8 = 392 KJ
To learn more about potential energy click here https://brainly.com/question/24284560
#SPJ4
What is the acceleration of a 8 kg mass that is
pushed with a force of 24 N?
OPTIONS:
A)192 m/s²
B)192 kg
C)3 m/s²
D)0.33 kg
The acceleration of a 8kg mass that is pushed with a force of 24 N is 3m/s² (option C).
How to calculate acceleration?Acceleration of a body refers to the amount by which a speed or velocity increases (and so a scalar quantity or a vector quantity).
Acceleration of a body can be calculated using the following expression:
Force = mass × acceleration
According to this question, a 8kg mass is pushed with a force of 24 N. The acceleration is calculated thus;
acceleration = 24N ÷ 8kg = 3m/s²
Therefore, 3m/s² is the acceleration of the body.
Learn more about acceleration at: https://brainly.com/question/1046166
#SPJ1
The acceleration of the object with 24 N force ana a mass of 8 kg is 3 m/s².
option C.
What is the acceleration of the object?The acceleration of the object is determined by applying Newton's second law of motion as shown below.
F = ma
where;
m is the mass of the objecta is the acceleration of the objectThe acceleration of the object with 24 N force ana a mass of 8 kg is calculated as follows;
a = F / m
a = ( 24 N ) / ( 8 kg )
a = 3 m/s²
Learn more about acceleration here: https://brainly.com/question/14344386
#SPJ1
Compare the different preure that reult a you add air to a balloon
and a you add air to a teel tank
When you add air to a balloon, the pressure inside the balloon increases, causing it to expand.
This is because the air pressure outside the balloon is greater than the air pressure inside the balloon. On the other hand, when you add air to a steel tank, the pressure inside increases as well, but the steel tank is able to withstand much higher pressure than a balloon, so the pressure inside the steel tank will not increase as quickly.
When air is added to a balloon, the air pressure inside the balloon increases and causes the balloon to expand. This is because the air pressure outside the balloon is greater than the air pressure inside the balloon, so the pressure inside the balloon increases faster than the pressure inside the steel tank.
Learn more about pressure:
https://brainly.com/question/28012687
#SPJ4
the x-component of the force on particle a when it is at x = 0.15 m is most nearly. (a) –20 n. (b) –2.0 n.(c) –1.0N(D) 2.0 N(E) 20 N
The X-component of the force on particle A when it is at X = 0.15 M is most nearly to 20N.
The term "components of the force" refers to these force-related elements. The x-component pushes right or left, while the y-component pushes up or down. These two components are referred to as pushing. The mathematical components behave on the coordinate axes like shadows of the force vector. The x-component extends from the vector's tail to the point where the reference line intersects the x-axis along the x-axis. The vector's y-component extends along the y-axis from the vector's tail to the point where the reference line intersects the y-axis. The horizontal and vertical forces that combine to create a force are represented by the components of a force. The elements of a vector are what I want to discuss. Components are two parallel vectors that add to the provided vector; therefore, let's begin with an illustration.
Learn more about force from here:
https://brainly.com/question/28875770
#SPJ4
Answer:
20 N (E)
Explanation:
We are given potential energy from the graph, so to find the x-component, we can determine the work. We also know that the slope of potential energy is work, so we can do:
Δ∪= -W
Δ∪= -FΔx
F= - du/dx
To find du/dx, we find the slope at x = 0.15 m
du/dx = (-3 - - 0)/(0.25-0.1) = -20 N
Now replace
F= - du/dx
F= - - 20
F = 20 N
Note that it is positive 20 N
I hope this helped :)
How long will it take for the plutonium to no longer exist?
It will take 8 years for the plutonium to no longer exists.
Plutonium is extremely uncommon. On Earth, there are only traces of it. Currently, NASA only has roughly 77 pounds of plutonium-238 available. Other radioactive isotopes can also be used as a heat source for an RTG, but plutonium-238 is a particularly effective one.
It decays more rapidly as it ages due to its half-life. Therefore, even when they are not consuming any of it, their supply is gradually running out. It will only take 8 years for NASA to run out of plutonium and the prospect of finding more in time for their next deep space mission is dim.
To know more about Plutonium, here
brainly.com/question/13273771
#SPJ4
If the eastward component of vector is equal to the westward component of vector and their northward components are equal. Which one of the following statements about these two vectors is correct?1) Vector is parallel to vector2) Vectors and point in opposite directions3) Vector is perpendicular to vector4) The magnitude of vector is equal to the magnitude of vector .5) The magnitude of vector is twice the magnitude of vector .
The magnitude of vector A must be equal to the magnitude of vector B
When two vectors are equivalent, what happens?Vector equals vector b. For two vectors to be equal, their magnitudes and directions must be the same. A vector’s components can never have a magnitude bigger than the vector itself. This is demonstrated by Pythagorean’s Thereom. There is a possibility that a component of a vector has the same magnitude as the vector itself. E.g. A=2x + 0y.
According to the parallelogram rule, if two vectors are placed such that they have the same beginning point and then completed into a parallelogram, the total of the vectors is the directed diagonal that starts at the same position as the vectors.
To learn more about vectors to refer;
https://brainly.com/question/29740341
#SPJ4
what are the electric potential and the magnitude of the electric field at the center of the square due to all four charges?
The electric potential at the center of the square due to all four charges is 0 volts.
The magnitude of the electric field at the center of the square due to all four charges is 2.83 E₀ N/C.
The complete question is in the attachment. The electric potential from a charge V = kQ/r
k = electrostatic constant = 9 × 10⁹ Nm²/C²q = charge (C)r = distance (m)V = the electric potential (V)The electric potential from four charges
V = V₁ + V₂ + V₃ + V₄
V₁ = V₂ = V₃ = V₄ = V₀The sign of charges is also a sign of electric potential.Q₁ = Q₂ = - QV = V₁ + V₂ + V₃ + V₄
V = - V₀ + (- V₀) + V₀ + V₀
V = 0 Volts
The magnitude of the electric field from a charge E = (k × Q) ÷ r²
E = The magnitude of electric fields (N/C)The direction of the electric field at a point from positive charges away from positive charges.The direction of the electric field at a point from negative charges to negative chargesAt P
Q₁ a negative charge.E₁₃ = E₁ + E₃ = E₀ + E₀ = 2E₀
E₂₄ = E₂ + E₄ = E₀ + E₀ = 2E₀
The angle between E₁₃ and E₂₄ = 90°
E² = E₁₃² + E₂₄² = (2E₀)² + (2E₀)² = 4E₀² + 4E₀² = 8E₀²
[tex]E \:=\: \sqrt{8E_0^2}[/tex]
E = 2√2 E₀
E = 2.83 E₀ N/C
Learn more about electric field here: https://brainly.com/question/14372859
#SPJ4
A police siren emits a sound wave of frequency 440 Hz. The speed of sound is 330 m/s. If police jeep moving with speed 20 m/s is following a heavy truck moving with 10 m/s, then frequency of echo from truck heard by a policeman inside the jeep is nearly A.440 HzB.467 HzC.450 HzD.480 Hz
The frequency of the echo from the truck heard by the policeman inside the jeep would be approximately 450 Hz,.
The frequency of the echo heard by the policeman inside the jeep would be different from the frequency of the sound wave emitted by the police siren due to the Doppler effect. The Doppler effect states that the frequency of a wave changes if the source or the observer is in motion relative to the medium through which the wave is traveling.
In this case, the speed of the truck relative to the air is 10 m/s and the speed of the jeep relative to the truck is 20 m/s, so the relative speed of the truck with respect to the air is 10 - 20 = -10 m/s.
The frequency of the echo from the truck heard by the policeman inside the jeep would be given by the following formula:
f = f0 * (v + vr) / (v + vs)
where f0 is the frequency of the sound wave emitted by the police siren, v is the speed of sound, vr is the relative speed of the truck with respect to the air, and vs is the speed of the jeep with respect to the air.
Plugging in the values, we get:
f = 440 Hz * (330 m/s - 10 m/s) / (330 m/s - 20 m/s)
f = 440 Hz * 320 m/s / 310 m/s
f = 440 Hz * 1.03226
f = 453.7 Hz
Therefore, the frequency of the echo from the truck heard by the policeman inside the jeep would be approximately 453.7 Hz, which is closest to option C (450 Hz).
Learn more about frequency here
https://brainly.com/question/5102661
#SPJ4
What is refraction? please answer it help me
Answer: Refraction is the bending of light (it also happens with sound, water and other waves) as it passes from one transparent substance into another.
Explanation:
if all of the full moon passes through earth's umbra, we will see a(n): group of answer choices partial lunar eclipse. annular solar eclipse. total lunar eclipse. partial solar eclipse. penumbral lunar eclipse.
Answer:
"total lunar eclipse"
Earth's umbra means the shadow of the earth (total)
If the full moon passes thru this shadow then the result is a total lunar eclipse
your friend anna explains that she believes that everything in the universe is in a constant state of change, so nothing is the same from one moment to the next. which famous philosopher would anna most agree with?
Anna mostly agrees with Heraclitus
Heraclitus of Ephesus was a Greek philosopher who lived before Socrates. He was from the city of Ephesus, which was a part of the Persian Empire at the time.
The life of Heraclitus is largely unknown. He only produced one piece, of which only fragments have survived. Based on interpretations of the preserved fragments, it is now believed that the majority of the ancient stories about him are fabrications. Since antiquity, his paradoxical philosophy, love of wordplay, and appreciation for cryptic expressions have earned him the moniker "the obscure." He was regarded as a miser who suffered from depression. In contrast to the ancient philosopher Democritus, who was referred to as "the laughing philosopher," he became known as "the weeping philosopher" as a result.
Learn more about Heraclitus here: https://brainly.com/question/13721256
#SPJ4
can someone please help me with this
Speed is a scalar quantity with a dimension of length divided by time, whereas "velocity" is a vector quantity.
What is the difference between average speed and average velocity?
The rate of change of position in a body is measured by average speed and average velocity.The fundamental distinction between average speed and average velocity is that the former is determined by dividing the total distance travelled by a body by the amount of time required, whilst the latter is determined by the displacement divided by the amount of time required.Speed is the amount of distance an object travels in one unit of time. A scalar quantity, speed. This indicates that there is no clear direction. Speed is a term used to describe how quickly an object is moving, or more specifically, how quickly a distance is being traversed.The overall displacement of the object in a given direction over the course of one unit of time is known as its velocity.
To learn more about velocity refer to:
https://brainly.com/question/80295?source=archive
#SPJ1
Two forces that are F1 =15N (east) and F2 = 7N (west) act on a body in a frictionless floor. The displacement of the body is 6 m, what is the work done by forces on the body?
if you had siblings or parents that you would bring which would it be? brother or sister which or mom or dad which one would you want to be at an important event!! thank you very much
Answer:siblings
Explanation:
phase of matter that consists of charged particles
The plasma state of matter is made up of electrically charged particles of gaseous matter.
What is the state of the matter?In physics, the term "state of matter" refers to one of the various states in which matter can exist. The solid, liquid, gas, and plasma states of matter can all be observed in daily life.
A gas of ionised atoms that conducts electricity and has almost equal amounts of positively and negatively charged particles is referred to as plasma in physics. That is a common name for the fourth state of matter, which is distinct from the solid, liquid, and gaseous states.
Learn more about Plasma state here:
brainly.com/question/950535
#SPJ1
Complete Question"
What state of matter consists of electrically charged particles ?
as you increase the temperature of a gas in a sealed, rigid container, what happens to the density of the gas? would the results be the same if you did the same experi- ment in a container with a piston at constant pressure? explain.
When the temperature of a gas is raised in a tightly sealed, rigid container, the gas's density will not change. In contrast, when the piston is kept at the same temperature in a container, density decreases.
Charles Law: At constant pressure, the volume occupied by the fixed amount of gas is directly proportional to its absolute temperature.
A gas's mass per unit volume is its density. Volume is directly proportional to temperature, as stated by Charles's law. Volume increases as temperature rises. However, in a rigid container, the gas's mass is unaffected by changes in temperature and volume. As a result, even as the temperature rises, density does not change.
The pressure in a container with a piston stays the same. As a result, according to Charles' law, gas density decreases as temperature rises during heating.
learn more about Charles's law here: https://brainly.com/question/16927784
#SPJ4
The picture shows two teenagers riding identical skateboards.
The skateboards are moving at the same speed and the teenagers have the same mass.Explain why the teenagers don’t have the same momentum
The teenagers do not have the same momentum because momentum is a vector quantity, meaning it has both a magnitude and a direction. While the skateboards are moving at the same speed, they could be moving in different directions,
which would result in different momentum values. Additionally, the teenagers themselves could be moving at different speeds in relation to the skateboards, which would also affect their momentum. Even though the teenagers have the same mass, their momentum will be different based on their velocity or direction of motion.
To know more about Momentum refer:
https://brainly.com/question/1042017
under what condition may an aircraft operate from a satellite airport within class c airspace?
In a Class C airspace area, it is illegal to take off or land an aircraft at a satellite airport unless you follow the FAA's arrival and departure traffic patterns.
After takeoff, the pilot must speak with the Class C tower as soon as is reasonably possible. As soon as practically possible after taking off, the pilot must establish and maintain two-way radio contacts with the ATC facility in charge of the Class C airspace area if taking off from a satellite airport without an operational control tower. Before entering Class C airspace, pilots are required to establish two-way radio communications. The pilot may enter Class C airspace if the controller replies to a radio call with "(a/c call sign) standby." This signals that radio communications have been established.
To learn more about aircraft click here https://brainly.com/question/20523427
#SPJ4
what step of the scientific method involves looking closely at the physical universe for the purpose of gathering knowledge? reading quiz h abeke 10th grade
The step of the scientific method that involves looking closely at the physical universe for the purpose of gathering knowledge is called observation.
Observation is an essential component of the scientific method and involves the collection of data through the use of the senses, instruments, or other methods. The goal of observation is to gather accurate and reliable information about the natural world, which can then be used to develop hypotheses, test theories, and ultimately deepen our understanding of the universe.
You can learn more about scientific method at
https://brainly.com/question/17216882
#SPJ4
In a continous Series, the average weight. of Some Students is 45kg and the Sum of their weight is 540kg. find the number of students
In a continuous series, some students have average weights of 45 kg, and the total of their weights is 540 kg. How many students are there? Ans: 12.
How do you find the average of a continuous series?The process is straightforward: you locate the midpoint from X, multiply the results by F, add them up to find summation fm, where m stands for the midpoint from X, and then divide the total by summation F.In continuous series, the observations are presented in several class intervals rather than by a single number, and the frequency corresponds to the number of data falling within that class interval.Finding a function's average value requires taking its integral across the interval and dividing it by the interval's length.Any value x at which a continuous probability distribution's probability density function reaches its locally maximum value is sometimes regarded as the distribution's mode.To learn more about average refer to:
https://brainly.com/question/130657
#SPJ1
4. An astronaut at rest in space with mass 84 kg fires a thruster that expels 35 g of hot gas at 875 m/s. What is the velocity of the astronaut after firing the thruster?
Answer:
The impulse (change in momentum) experienced by the astronaut is given by the product of the force applied and the time over which it is applied. The force applied is given by the rate at which mass is expelled multiplied by the velocity at which it is expelled, which is (35 g * 875 m/s) = 30.625 N.
The impulse experienced by the astronaut is equal to the change in momentum, which is given by the initial mass multiplied by the final velocity, so we can set up the following equation:
m_initial * v_initial = m_final * v_final
where m_initial = 84 kg (mass of astronaut) and m_final = 84 kg (mass of astronaut + 35 g of hot gas).
Solving for v_final, we get:
v_final = m_initial * v_initial / m_final
= 84 kg * 0 m/s / 84 kg
= 0 m/s
So the astronaut's velocity does not change after the thruster is fired because the velocity of the expelled gas is in the opposite direction to the astronaut's motion, they are canceling out.
sam flies past earth at 0.75c. as he goes by, he fires a bullet forward at 0.75c. suzy, on the earth, measures the bullet's speed to be
The bullet's speed on the earth to be 0.96c, if sam flies past earth at 0.75c.
The speed of the sam with the frame of reference of earth, v = 0.75c
The speed of bullet with frame reference of of sam, u₁ = 0.75 c
Let the speed of the bullet with frame of reference of the earth, = u
The lorentz velocity transformation are,
u = (u₁+v)/(1 + (u₁v/c²))
u = (0.75c + 0.75c)/(1 + (0.75×0.75×c²/c²))
u = 1.5c/(1 + 0.5625)
u = 0.96c
Hence the speed of the bullet with respect to the frame of reference of earth is 0.96c.
To know more about speed, here
https://brainly.com/question/28224010
#SPJ4
Within which interval of rating would you expect to find the largest number of shows?A. 5-10B. 10-15C. 15-20D. 20-25E. All are equal
The numerical sequence is an arithmetic series. The series (5a, 10B, 15c, and 20D) continues with 25e.
The series presented is 5a, 10B, 15c, and 20D.
A letter and a number make up each phrase.
It can be broken down into (5, 10, 15, 20, etc.) and ( a , B , c , D , . . .)
The numerical sequence is an arithmetic series.
The common difference (d) is 5 and the first term (a) is 5.
Its general formula is = a + (n-1)d.
Fifth term = a + is the subsequent step in the series (5-1)
d = 5 +(5-1) ×5 = 25 ⇒⇒ (1) (1)
The alphabetical order of the letters from a to z is the series of letters, but with the sequence is ( capital , small , capital , . . . .)
The letter after D in small case will therefore be the series' next entry.
which equals e. (2)
Using (1) and (2)
The series (5a, 10B, 15c, and 20D) continues with 25e.
Learn more about arithmetic here
https://brainly.com/question/9195680
#SPJ4
if the distance to a star was suddenly cut in half, how many times brighter would the star appear?
If the distance to a star was suddenly cut in half, the star would appear 4 times brighter.
We know the expression between the intensity of star and the distance as, I ∝ 1/r²
where,
r is the distance
I is the intensity of light
Here, it is given that the distance is cut down by half, so, r becomes r/2.
Placing it in the above relation, we have, I ∝ 1/(r/2)²
⇒ I ∝ 4/r²
So, the relation says, the intensity becomes 4 times when the distance is reduced to half.
Thus, the star appears to be four times brighter.
To know more about stars:
https://brainly.com/question/14828508
#SPJ4
