The event horizon is directly related to the mass of the black hole, with larger black holes having larger event horizons.
What is Black Hole?
A black hole is an astronomical object that has collapsed to such a small size that its gravitational pull is so strong that nothing, not even light, can escape it. Black holes are formed from the remnants of massive stars that have run out of fuel and undergone a catastrophic collapse, or from the merging of two or more smaller black holes.
M87 and Ton 618 are both supermassive black holes, with masses estimated to be around 6.5 billion and 66 billion times the mass of the Sun, respectively. However, the size of their event horizons would depend not only on their mass but also on their spin and the density of the surrounding matter. It is therefore not possible to predict which black hole would be bigger without additional data and calculations.
It is worth noting that the first image of a black hole that was released in 2019 was actually an image of the event horizon of the black hole in M87, not the black hole itself. The event horizon of M87's black hole was estimated to be around 40 billion km in diameter, which is larger than the entire solar system.
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Car a has a forward speed of 5 m/s and is accelerating at 2. 5 m/s2. Determine the velocity and acceleration of the car relative to observer b, who is riding the ferris wheel and has a constant speed of 3 m/s
Car A has a velocity of 8 m/s and an acceleration of 2.5 m/s2 relative to observer B, who is riding the ferris wheel and has a constant speed of 3 m/s.
Velocity is the directional speed of an object in motion as an indication of its rate of change in position as observed from a particular frame of reference and as measured by a particular standard of time Velocity defines the direction of the movement of the body or the object. Speed is primarily a scalar quantity. Velocity is essentially a vector quantity. It is the rate of change of distance. It is the rate of change of displacement. It can be calculated by obtaining the ratio of displacement and the total time taken. velocity is expressed in metres/second or m/s. The SI unit of velocity is metre per second (m/s).
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An object starts out with a momentum of 5 kg·m/s. After a collision, it has a momentum of 25 kg·m/s in the same direction.
Which of the following parameters are consistent with the indicated change in momentum?
The parameter that is consistent with the indicated change in momentum is:
The velocity of the object increased from 1 m/s to 5 m/s.How to determine which of the following parameters are consistent with the indicated change in momentum ?First we can use the principle of conservation of momentum to determine which of the following parameters are consistent with the indicated change in momentum:
p = m * v
Where
p is the momentum m is the mass of the objectv is the velocityIf the momentum of the object increases from 5 kg·m/s to 25 kg·m/s in the same direction, then we can conclude that:
The mass of the object must have remained constant.The velocity of the object must have increased by a factor of 5.Therefore, the parameter that is consistent with the indicated change in momentum is:
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What is the wave speed of a wave that has a frequency of 500Hz and a wavelength of 0.40m?
please help with this
Answer:
it is
option A . Tuberculosis ✔
what happens to the ballon when you squeeze the bottle?
Answer:
When you squeeze a bottle that has a balloon attached to its opening, the pressure inside the bottle increases. This increased pressure will cause the air molecules inside the bottle to move closer together, which in turn will cause the balloon to inflate.
If you continue to squeeze the bottle, the pressure inside the bottle will continue to increase, and the balloon will continue to inflate. However, if you squeeze the bottle too hard, the balloon may burst due to the excess pressure.
When you release the pressure on the bottle, the air molecules inside the bottle will spread out again, causing the pressure to decrease. As a result, the balloon will deflate back to its original size.
A 70 kg hockey player is skating on ice at 6 m/s. Another hockey player of equal mass,moving at 8 m/s in the same direction, hits him from behind.They slide off together
The two hockey players move off together at a common velocity of 7 m/s after the collision.
What is principle of conservation of momentum?
According to the concept of conservation of momentum, if no outside forces are acting on a closed system, its overall momentum will remain constant. In other words, if no external forces are acting on the system, the total momentum before an event or interaction is equal to the total momentum after the event or contact.A physical quantity known as momentum is calculated by multiplying an object's mass by its velocity. As a result, the conservation of momentum states that all objects in the system have constant masses and velocities both before and after a contact.We can apply the momentum conservation concept to resolve this issue. This rule states that a closed system's total momentum is conserved both before and after a collision.
The product of an object's mass and velocity determines its momentum. As a result, we can determine each hockey player's momentum prior to the contact using the formulas below:
Momentum of the first hockey player (moving at 6 m/s): p1 = m1*v1 = 70 kg * 6 m/s = 420 kg m/sMomentum of the second hockey player (moving at 8 m/s): p2 = m2*v2 = 70 kg * 8 m/s = 560 kg m/sThe total momentum of the system before the collision is the sum of these individual momenta:
p_total = p1 + p2 = 420 kg m/s + 560 kg m/s = 980 kg m/s
The two hockey players fall off together after the collision. After the collision, their velocities are unknown to us, but we do know that their total momentum is still preserved. Hence, we can write:
p_total = (m1 + m2) * v_total
where v_total is the common velocity of the two hockey players after the collision. We can rearrange this equation to solve for v_total:
v_total = p_total / (m1 + m2)
= 980 kg m/s / (70 kg + 70 kg)
= 7 m/s
Therefore, the two hockey players move off together at a common velocity of 7 m/s after the collision.
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Find the angle of refraction for a ray of light passing from air into water when i=23°
The refraction angle is 14.9 degrees. The river reflects part of the light. The remaining light enters the water and travels through it, but it distorts (or refracts) during the process.
What transpires throughout refraction?When a wave enters a medium with a different speed than itself, it bends, which is known as refraction. When light travels through a fast medium and into a slow medium, the light beam is refracted, which causes it to bend in the direction of the line separating the two media.
What is light refraction and why does it happen?The light's rate of travel will alter as it passes throughout one medium and thereafter enters another. Refraction results as a result of this. due to the shift in the medium.
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Fill in these blanks:
If you increase the temperature of gas in a container that cannot expand, the pressure will _______. This is because the particles in the gas are moving _______ and colliding _______ often.
If you increase the temperature of gas in a container that cannot expand, the pressure will increase. This is because the particles in the gas are moving faster and colliding more often.
What happens when temperature of gas is increased?The kinetic theory of gases explains that the temperature of a gas is related to the average kinetic energy of its particles. When the temperature of the gas is increased, the particles move faster and collide more frequently with the walls of the container, resulting in a greater number of collisions per unit of time.
This increased number of collisions leads to an increase in pressure within the container, as the force of each collision adds up to a greater overall force on the walls of the container. Therefore, increasing the temperature of gas in a container that cannot expand will lead to an increase in pressure.
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Please help me I need help on this and it's due tomorrow
Answer:
the future of c DC and hi to mere ko pahchani pahchani pahchani pahchani pahchani pahchani pahchani pahchani pahchani the future of c DC and hi
Explanation:
v I will be in the future of c DC and hi to everyone who has a few days ago I will be in the future of c DC and hi to everyone and their children of God I will be in the future of c DC and hi to everyone who has a few days ago I will be in the future of c DC and their families of the attached document and their families will get back from try to the the future can vsnydb behind f
Plastics do not deform when bent and can be shaped into objects
Plastics are made of synthetic polymers that are non-deforming when bent or compressed, making them useful for forming into various shapes.
Synthetic polymers are derived from petroleum oil, and made by scientists and engineers. Examples of synthetic polymers include nylon, polyethylene, polyester, Teflon, and epoxy. Natural polymers occur in nature and can be extracted. They are often water-based.Synthetic polymers are sometimes referred to as “plastics”, of which the well-known ones are nylon and polyethylene. The polymers which are formed by linking monomer units, without any change of material, are known as addition polymers or also called chain-growth polymers.
Synthetic polymers are lightweight, hard to break, and last a long time. They are quite cheap to make and easy to form into shapes. One of the most common and versatile polymers is polyethylene. It is made from ethylene (also known as ethene) monomers.
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Explain in terms of internal energy of the system how the evaporation of sweet cools down the body of the athlete after exercising.
The internal energy of the system how the evaporation of sweet cools down the body of the athlete after exercising are mentioned below.
What is evaporation ?
The water cycle's crucial step is evaporation. When a liquid transforms into a gas, evaporation takes place. As rain puddles "disappear" on a hot day or when wet clothing dries in the sun, it is simple to envision. The liquid water in these instances is evaporating into a gas known as water vapor rather than actually dissipating.
What is energy?
Examples and Definitions of Energy (Science) The capacity to work comes from energy. Energy types include chemical, nuclear, and electrical energy. Science and engineering both depend on the idea of energy. Here is a look at the classification of energy as well as its description and examples.
Therefore, The internal energy of the system how the evaporation of sweet cools down the body of the athlete after exercising are mentioned above.
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Answer question in photo
The kinetic energy of this roller coaster car that is moving at the given velocity can be found to be 40, 924. 72 J.
How to find the kinetic energy ?The formula: gives the kinetic energy (KE) of a moving item.
KE = ( 1 / 2 ) mv ²
Where m is the object's mass and v is its speed.
In this instance, the roller coaster car has a mass of 311.11 kg and a velocity of 16.22 m/s. When these values are added to the formula, we obtain:
KE = ( 1 / 2 ) ( 311.11 kg )( 16.22 m/s) ²
KE = (0.5) (311.11 kg) ( 263. 02 m ² /s ²)
KE = 40, 914. 08 joules (J)
In conclusion, the kinetic energy is 40, 914. 08 joules.
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Between mercury, venus, earth and mars which has the smallest orbit
Answer:
Mercury has the shortest orbit
Explanation:
Its right
1 > Explain why scientists cannot watch the complete process of a star and planets forming. J
Scientists cannot watch the complete process of a star and planets forming due to dust
Basically, formation of a star takes place after the accumulation of gas and dust. which gets collapsed due to gravitation. This whole process takes millions of years until a star is formed and starts to shine like a sun. Moreover, the leftovers of from the formed star creates planets. In the whole process of formation of stars and planets the dust makes visible light difficult to see with help of our radio telescopes. Although it is possible for us observe formation of stars by radio waves.
Hence, due to dust and leftovers of stars scientists finds it difficult to see the formation of stars and planets.
Scientists use telescopes and simulations to study the formation of stars and planets because to their long time scales, distant locations, and dense dust and gas in molecular clouds.
Scientists cannot directly watch the full formation of a star and planet since these activities take place over extraordinarily long periods of time and often in faraway and opaque parts of space. In enormous molecular clouds, dense dust and gas block most electromagnetic radiation, including visible light, allowing stars and planets to form.
Time Scales: Scientists can't directly monitor every stage of star and planet formation because it takes millions of years.
Distance: Many of these creation events occur in faraway areas of our galaxy or other galaxies. With current technology, these processes are hard to see.
Obstructions: Thick clouds of dust and gas surround the regions where stars and planets develop, making it difficult for visible light and other electromagnetic waves to penetrate and provide clear observations.
Early Stages: These dense clouds hide the first collapse of material that forms protostars and protoplanetary discs.
Despite these constraints, scientists study these phenomena with infrared, radio, and X-ray telescopes. These approaches let astronomers to see infrared emissions from young stars and protoplanetary discs through dust clouds, indicating their origin. Scientists combine observations with theoretical knowledge to study star and planet formation using computer simulations and models.
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a boy whose mass is 40kg runs up a flight of 30 step each 150 mm in 60 second find the averse power develop expansion explain the anomalous of two of water
The average power developed by the boy during the climb is approximately 29.4 W.
What is power?In physics, the amount of energy transferred or converted per unit time is called power.
total height = number of steps x height of each step
total height = 30 x 0.15 m = 4.5 m
Given, time = 60 s
As power = work done / time
work done = force x distance
force = mass x gravity
mass is boy's mass (40 kg) and gravity is acceleration due to gravity (9.81 m/s²).
force = 40 kg x 9.81 m/s² = 392.4 N
The distance that the boy moves is equal to the total height that he has climbed: distance = total height = 4.5 m
work done = force x distance
work done = 392.4 N x 4.5 m = 1765.8 J
power = work done / time
power = 1765.8 J / 60 s
power ≈ 29.4 W
Therefore, the average power developed by the boy during the climb is approximately 29.4 W.
As for the anomalous behavior of water, water has a higher boiling point and melting point as compared to other substances with similar molecular weight. This is due to the strong hydrogen bonding between water molecules, which requires more energy to break the bonds and change the state of water from solid to liquid to gas.
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a narrow capillary of radius 2cm placed in a liquid was observed to rise to a height of 12cm for water and 5cm for mercury. calculate the coefficient of surface tension for water and mercury of density 1000kg/m^3 and 13,000kg/m^3 use g=9.81 m/s^2
The coefficient of surface tension of water is 29400 N/m and the coefficient of surface tension for the mercury in the capillary tube is 159412.5 N/m.
What is surface tension ?The surface tension of a liquid is the force on its surface caused by the particle - particle attraction in the surface layer by the bulk of the liquid which results in the minimization of surface area.
The equation connecting the coefficient of surface tension with radius of capillary, height and density is given as :
γ = ρ g h/2r
For water ,
ρ = 1000 kg/m³
h = 12 cm = 0.12 m
r = 2 cm = 0.02 m.
then γ = 1000 kg/m³ × 9.8 m/s² × 0.12 m/ (2 × 0.02 m)
= 29400 N/m.
For mercury,
ρ = 13000 kg/m³
h = 5 cm = 0.05m
r = 2 cm = 0.02 m.
then γ = 13000 kg/m³ × 9.8 m/s² × 0.05 m/ (2 × 0.02 m)
= 159412.5 N/m.
Therefore, the coefficient of surface tension of water is 29400 N/m and the coefficient of surface tension for the mercury in the capillary tube is 159412.5 N/m.
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Recently, German engineers produced a fuel cell that can generate 4. 2 x 10^10 J of electricity in 1. 1 x 10^3 h. What potential difference would this fuel cell place across a 40. 0 W resistor?
The potential difference that this fuel cell would place across a 40.0 W resistor is 651 V.
To find the potential difference across the resistor, we can use the formula:
Power = (Potential difference)² / Resistance
First, we need to calculate the power generated by the fuel cell:
Energy generated = 4.2 x 10^10 J
Time taken = 1.1 x 10³ h
We need to convert the time taken to seconds:
1.1 x 10³ h x 3600 s/h = 3.96 x 10^6 s
Power generated = Energy generated / Time taken
= (4.2 x 10^10 J) / (3.96 x 10^6 s)
= 1.06 x 10^4 W
Now we can use the formula to find the potential difference:
Power = (Potential difference)²/ Resistance
Rearranging the formula:
Potential difference = √(Power x Resistance)
Resistance = 40.0 W
Potential difference = √(1.06 x 10^4 W x 40.0 W)
= √4.24 x 10^5 V^2
= 651 V (to three significant figures)
Therefore, it can be concluded that the potential difference is calculated to be 651 V for the fuel cell placed across a 40.0 W resistor.
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what is the difference in seismic wave arrival of the epicenter is 5000 km away
Answer:
2 minutes 20 seconds
Q. Seismic station A is 5000 kilometers from the epicenter. What is the difference between the arrival time of the first P-wave and the arrival time of the first S-wave recorded at this station? answer choices 2 minutes 20 second
Explanation:
You are given f1(x), a transverse wave that
moves on a string that ends and is FIXED in
place at x = 5 m. As the problem begins, the
wave is moving to the right at v = 1 m/s.
The shape of the wave after 3 seconds will be the same as its initial shape, but it will be displaced to the right by a distance of 3 meters.
Assuming that the wave is a sinusoidal wave, the shape of the wave after 3 seconds can be determined by considering the wavelength and frequency of the wave.
The wavelength is the distance between two consecutive peaks or troughs of the wave, while the frequency is the number of waves that pass a given point in a unit of time. The velocity of the wave is equal to the product of the wavelength and frequency, or v = λf.
If the wave is moving to the right at a constant velocity of 1 m/s, then the wavelength and frequency will remain constant over time. Therefore, the shape of the wave after 3 seconds will be the same as its initial shape, but it will be displaced to the right by a distance of 3 meters.
What is a sinusoidal wave?
A sinusoidal wave is a type of transverse or longitudinal wave that moves in a periodic, or repeating, pattern. The shape of a sinusoidal wave can be represented by a sine or cosine function.In a transverse sinusoidal wave, the particles of the medium move perpendicular to the direction of wave propagation. This type of wave is commonly observed in electromagnetic waves, such as light waves, and in waves on a string.In a longitudinal sinusoidal wave, the particles of the medium move parallel to the direction of wave propagation. This type of wave is commonly observed in sound waves.The properties of a sinusoidal wave include wavelength, frequency, amplitude, and velocity. Wavelength is the distance between two consecutive points in the wave that are in phase, or have the same amplitude and phase angle. Frequency is the number of cycles, or complete wavelengths, that occur in a given time period. Velocity is the speed at which the wave travels through thesame medium.To know more about sinusoidal waves, click the link given below:
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When something moves, there is more than one __________________ involved
Answer:
Explanation:
force
Gravitational potential energy is the energy stored in an object due to its height
above a reference level. Which of the following choices best describes the
correct formula of gravitational potential energy?
ΔU = mgh is the expression to Gravitational Potential Energy for Height (h).
What kind of energy from gravitational potential is that?A book on even a high shelf, for instance, has more energy potential than a book here on bottom shelf since it requires a longer distance to fall. Items having gravitational potential energy can also include the following: a heavier burden. water retentive to a dam.
Why does kinetic energy differ from gravitational potential energy?The energy held within an item as a result of its height above the ground is known as gravitational potential energy. The object's height, gravitational acceleration caused by the Earth, and mass all play a role in this. The energy an item possesses as a result of its motion is known as kinetic energy.
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why does the magnetic field allow some of the solar energy but not all?
!!!ANSWERS ASAP!!!
1: What is the transfer of energy that occurs when a plant makes food through the process of photosynthesis.
A: light to chemical
B: chemical to light
C: light to thermal
D: thermal to nuclear
2: What is the transfer of energy that occurs when you use your ipod to listen to music?
E: sound to electric
F: mechanical to sound
G: thermal to sound
H: chemical to sound
3: What is the transfer of energy that occurs when a boy eats an ice cream?
J: chemical to mechanical
K: chemical to light
L: thermal to chemical
M: thermal to mechanical
4: What is the transfer of energy that occurs with a wind turbine?
R: light to mechanical
S: mechanical to thermal
T: mechanical to nuclear
V: thermal to mechanical
Think of it as abcd, once a is taken, a cant be used again. one is a, one is b, one is c, and one is d. !PLEASE ANSWER FAST!
Answer:
summary the passage you just read be sure to
Answer:
1 - A
2 - F
3 - L
4 - V
Explanation:
Might be a little hard to believe, but the order of the answers are A, B, C, and D, hehe.
A wire whose resistance is R is stretched so that its length is tripled while its volume remains unchanged.
Determine the resistance of the stretched wire.
Express your answer in terms of R and appropriate constant
When a wire is stretched so that its length is tripled, its cross-sectional area decreases by a factor of 3, since the volume of the wire remains the same.
The resistance of a wire is given by the equation:
R = ρ L / A
where R is the resistance, ρ is the resistivity of the wire (a constant that depends on the material), L is the length of the wire, and A is the cross-sectional area of the wire.
If the length of the wire is tripled while its volume remains constant, the cross-sectional area of the wire must decrease by a factor of 3. Therefore, the new cross-sectional area of the wire is 1/3 of its original value.
Let A' be the new cross-sectional area of the wire. Then :--
A' = A / 3
Substituting this expression for A' into the equation for resistance gives:--
R' = ρ (3L) / (A/3) = 9ρL / A
Therefore, the resistance of the stretched wire is 9 times the resistance of the original wire. In terms of the original resistance R, we have:--
R' = 9R
So the resistance of the stretched wire is 9 times the resistance of the original wire.
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3. What property of water makes it possible for some insects to skate across the surface of a river or lake?
A. High specific heat
B. Surface tension
C. Condensation
D. Capillary action
Answer:
B. surface tension
Explanation:
The potential energy of an apple is 9.0 Joules. The apple is 3.2 m high. What is the mass of the apple?
The mass of the apple witha potential energy of 9.0 Joules is approximately 0.287 kg.
What is the mass of the apple?Potential energy is simply energy possessed by a body due to its position relative to others.
It is expressed as;
P.E = m × g × h
Where PE is the potential energy, m is the mass of the object, g is the acceleration due to gravity (approximately 9.8 m/s²), and h is the height of the object.
In this case, the potential energy of the apple is given as 9.0 J and the height of the apple is 3.2 m.
Plugging these values into the formula, we get:
P.E = m × g × h
9.0 J = m × 9.8 m/s² × 3.2 m
9.0 J = m × 31.36 mkg/s²
Dividing both sides by 31.36 m/s², we get:
m = 9.0 J / 31.36 mkg/s²
m = 0.287 kg
Therefore, the mass of the apple is 0.287 kg.
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It takes 3 minutes for Ann to run 800 meters without sandbags. If Ann runes 800 meters with sandbags it will take 2 more minutes. What is the speed for running with sandbags?
Ann's speed with sandbags is 400 meters in 5 minutes, or an average of 80 meters per minute.
In everyday use and in kinematics, the speed of an object is the magnitude of the change of its position over time or the magnitude of the change of its position per unit of time; it is thus a scalar quantity.Speed is defined as. The rate of change of position of an object in any direction. Speed is measured as the ratio of distance to the time in which the distance was covered. Speed is a scalar quantity as it has only direction and no magnitude.There are four types of speed which are uniform speed, variable speed, average speed, and instantaneous speed.
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Determine the tension developed in cable ab for equilibrium of the 440- lb crate. (figure 1) express your answer to two significant figures and include the appropriate units
The tension developed in cable AB for the equilibrium of the 440-lb crate is approximately 1606 lb (to two significant figures). The units are pounds (lb).
To determine the tension developed in cable AB for the equilibrium of the 440-lb crate, we need to use the principle of equilibrium, which states that the net force acting on an object is zero.
Vertical component:
W = 440 lb
Tsin30 = (T/2) lb (since sin30 = 1/2)
Horizontal component:
Tcos30 = (0.866T) lb (since cos30 = √3/2 ≈ 0.866)
Since the crate is in equilibrium, the net force in the vertical direction must be zero. Therefore,
Tsin30 = W
(T/2) = 440 lb
T = 2 × 440 lb / sin30
T ≈ 1606 lb
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A household uses the following electric appliances:
refrigerator of rating 400W for 10 hours each day.
two electric fans of rating 80 W for 6 hours daily.
Six electric tubes of rating 18 W for 6 hours daily.
Calculate the electricity bill for the household for month of June if cost of electricity energy is ₹ 3.00 per unit
The electric bill for the household for the month of June is ₹ 504.72
How do I deterrmine the electric bill for the month of june?We'll begin by obtaining the energy consumed. This is shown below:
For fridge:
Power = 400 WTime = 10 hoursEnergy for fridge =?Energy = power × time
Energy for fridge = 400 × 10
Energy for fridge = 4000 Wh
Divide by 1000 to express in KWh
Energy for fridge = 4000 / 1000
Energy for fridge = 4 kWh
For fan:
Power = 80 WTime = 6 hoursEnergy for fan =?Energy = power × time
Energy for fan = 80 × 6
Energy for fan = 480 Wh
Divide by 1000 to express in KWh
Energy for fan = 480 / 1000
Energy for fan = 0.48 kWh
Energy for 2 fans = 2 × 0.48 = 0.96 kWh
For tube:
Power = 18 WTime = 6 hoursEnergy for tube =?Energy = power × time
Energy for tube = 18 × 6
Energy for tube = 108 Wh
Divide by 1000 to express in KWh
Energy for tube = 108 / 1000
Energy for tube = 0.108 kWh
Energy for 6 tubes = 6 × 0.108 = 0.648 kWh
Total energy consumed per day = 4 + 0.96 + 0.648 = 5.608 kWh
Total energy consumed per month = 30 × 5.608 = 168.24 kWh
Finally, we shall determine the electric bill for the month of june. Details below:
Cost per KWh = ₹ 3.00Total energy (E) = 168.24 KWhElectric bill for June =?Electric bill = energy × Cost per KWh
Electric bill for June= 168.24 × 3
Electric bill for June = ₹ 504.72
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If the temperature outside is 273 Kelvin, the temperature in degrees Celsius is 0 degrees Celsius. is this ture or false
Answer: false
Explanation: This is false the tempature of -272 celcius in 1 kelvin.