Answer: The sun.
Explanation:
Im pretty sure the sun shines brightly and
The rear window in a car is approximately a rectangle, 2.0m wide and 0.38m high. The inside rearview mirror is 0.59m from the driver's eyes, and 1.57m from the rear window.
(A) What is the minimum length for the rearview mirror if the driver is to be able to see the entire width and height of the rear window in the mirror without moving her head? Answer in centimeters
(B) What is the minimum height for the rearview mirror if the driver is to be able to see the entire width and height of the rear window in the mirror without moving her head? Answer in centimeters
(A)The minimum length for the rearview mirror if the driver is to be able to see the entire width and height of the rear window in the mirror without moving her head is 167 cm.
To calculate the minimum length for the rearview mirror, we need to consider the Pythagorean theorem. The rearview mirror is 1.57m from the rear window and 0.59m from the driver's eyes. To form a right triangle, we can use these two measurements as the legs of the triangle, and the hypotenuse (the minimum length of the rearview mirror) is the square root of the sum of the squares of these two legs. Therefore, the minimum length of the rearview mirror is: √ (1.57^2 + 0.59^2) = √ (2.4449 + 0.3481) = √ (2.793) = approximately 1.67m = 167 cm
(B) The minimum height for the rearview mirror if the driver is to be able to see the entire width and height of the rear window in the mirror without moving her head is 24.15 cm.
To calculate the minimum height for the rearview mirror, we need to consider the width of the rear window (2.0m) and the distance between the rear window and the rearview mirror (1.57m). The minimum height of the rearview mirror is the tangent of the angle formed by these two measurements. Therefore, the minimum height of the rearview mirror is:(0.38/1.57) = 0.2415 = 24.15 cm
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How do you find the direction of torque in a magnetic field?
The direction of torque is the direction of cross product of magnetic moment and magnetic field.
Magnetic moment is defined as the tendency of an object to align itself with the magnetic field. It is a vector quantity. The direction of this is from south pole to north pole of the magnet. Magnic moetment is produced by the movement of electric charge, or by spin angular motion. It is also known as magnetic dipole moment. The torque(T) is the product of magnetic moment(M) and the external magnetic field(B). Mathematically,
T = m × B
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A 35 kg astronaut in space is holding a 3 kg piece of alien cheese and moving at a velocity of 2 m/s. how fast does the astronaut need to throw the cheese to bring herself to rest?
The velocity of the cheese is obtained as 25.33 m/s.
What is the velocity?Here we have to use the principle of the conservation of linear momentum and this states that the momentum before collision is equal to the total momentum after collision but let us also know that we can be able to apply this to a closed system.
We then have that;
Momentum before collision = Momentum after collision
(35 + 3) * 2 = (35 * 0) + (3 * v)
v = velocity of the cheese
76 = 3v
v = 76/3
v = 25.33 m/s.
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which of these is responsible for initiating a signal transduction pathway?
A ligand (such as a hormone or neurotransmitter) binding to a receptor on the cell surface is responsible for initiating a signal transduction pathway. This binding causes a conformational change in the receptor, which then activates intracellular signaling molecules, ultimately leading to changes in gene expression or other cellular responses.
25% part (a) what is the car's highest possible speed, in kilometers per hour, when the speedometer reads 95 km/h?
If there is no uncertainty in the Speedometer then the car's highest possible speed, in kilometers per hour is same as the speedometer reads 95 km/h.
What is a speedometer?A speedometer, often known as a speed meter, is a gauge that calculates and shows the current speed of a moving object. Speedometer began to be offered as choices in the early 20th century and became standard equipment starting around 1910 for vehicles to get their speed. Today, they are fitted to all motor vehicles.
Unit of Measurement of Speedometer:Vehicles today have speedometers that measure speed in kilometers per hour. They also have odometers, which track the overall distance driven by cars in kilometers (km).
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What is the energy of a photon of electromagnetic radiation with a wavelength of 465 nm appears as blue light to the human eye?.
The photon energy of electromagnetic radiation with a wavelength of 465 nm is 4,2 x 10⁻¹⁹ J.
To determine the energy of the emitted light, we need a relationship to the wavelength of the light. In terms of the equation formula is
E = hc/λ
Where h is Planck's constant and c is the speed of light and λ is the wavelength of light.
Planck's constant is 6.626 x10⁻³⁴ m² kg/s and the speed of light is 3x10⁸m/s. The wavelength is 465 nm = 465x10⁻⁹ m.
So,
E = hc/λ
E = (6.626 x10⁻³⁴)(3x10⁸)/465x10⁻⁹
E = 19.875 x 10⁻²⁶/465x10⁻⁹
E = 4,2 x 10⁻¹⁹ J
So, the energy of a photon is 4,2 x 10⁻¹⁹ J.
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microscope objectives stay relatively in focus when magnification is changed
Parfocal microscope objectives stay relatively in focus when magnification is changed.
What is parfocal microscope?Objectives that adaptable with little to no focussing are referred to as "parfocal". It is convenient when the lenses stay in focus during the entire process of changing the magnification on your microscope. The presence of named objectives on a microscope makes this possible.When the magnification or focal length changes, a parfocal lens maintains focus. With the aid of parfocal lenses, one can focus on a distant object while simultaneously moving closer to it. Parfocal zoom lenses are used frequently in microscopes and telescopes as well as in photography.For more information on parfocal microscope kindly visit to
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Complete question : : Microscope objectives stay relatively in focus when magnification is changed. ?
a. parfocal
b. field of view
c. resolution
d. lowest
true or false: if an emergency vehicle is using its lights or siren on the other side of a divided highway you need to pull over and stop.
This statement is false; if an emergency vehicle is using its lights or siren on the other side of a divided highway you need to pull over and stop.
No, a barrier or median separates the two lanes of the road. On a divided roadway, an emergency vehicle could occasionally go the opposite way. If : if an emergency vehicle is using its lights or siren on the other side of a divided highway you need to slow down your vehicle, cede the right of way, and drive carefully.
Any public or private road or other public path on land is referred to as a highway. It encompasses various public roads and public tracks in addition to being utilized for major routes.
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During one cycle a car's engine undergoes combustion and absorbe 475 J and expels 398 J as heat. What is the engine's efficiency?
The engine's efficiency is 16.21%. During one cycle a car's engine undergoes combustion and absorbs 475 J and expels 398 J as heat.
What formula is used to determine an engine cycle's efficiency?WQH=1 TCTH for efficiency. Naturally, these temperatures are in degrees Kelvin, thus for instance, the efficiency of a Carnot engine with a hot reservoir of boiling water and a cold reservoir of ice cold water will be 1(273/373)=0.27, or little more than 25% of the heat energy is converted into productive work.
Even the most effective heat engines have limited efficiency; it is often far below 50%. It follows that the energy that heat engines waste by dissipating into the environment is a significant loss of energy.
engine's efficiency = [tex]\frac{475-398}{475} *100%[/tex]
engine's efficiency = [tex]\frac{77}{475} *100%[/tex]
engine's efficiency = 0.1621*100
engine's efficiency = 16.21%
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At the end of 2009, global population was about 6. 8 billion people. What mass of glucose (c6h12o6) in kg would be needed to provide 1500 cal/person/day of nourishment to the global population for one year? assume that glucose is metabolized entirely to co2 and h2o(l).
At the end of 2009, global population was about 6. 8 billion people. 9.998×10^8 kg of glucose (c6h12o6) would be needed to provide 1500 cal/person/day of nourishment to the global population for one year.
Thermochemical Equation
It is a balanced stoichiometric chemical equation that includes the enthalpy change. The addition of the energy changes of all the thermochemical equations included in an overall reaction is equal to the overall energy change.
global population is 6.8 billion people
= 6.8 ×10^9 people
amount of energy needed for people for one year = 6.8×10^9 × 1500cal/person/day × 365days × 4.184joule × 1kJ/1000J
= 1.557 ×10^13 KJ
Amount of glucose required to release the above energy = ( 1.557×10^13 kJ/year) × 1mole glucose/2803kJ × 180g glucose/1mol glucose × 1Kg/1000g
= 9.998×10^8 kg Glucose/year
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what device was used to measure the magnetic field intensity, allowing scientists to study the magnetic properties of rocks?
In geophysical surveys, to measure the Earth's magnetic field, to find different kinds of magnetic anomalies, and to calculate the dipole moment of magnetic materials, magnetometers are frequently used.
How can magnetic field strength be determined?You can measure the magnetic field at a specific location in space using a magnetometer, also known as a gaussmeter. The direction of the magnetic field can also be measured by some devices. Midway through the 1800s, these devices were created, and they have since developed into precise, accurate measurement tools.
Every type of aircraft and spacecraft needs a magnetometer, also referred to as a magnetic sensor, to measure magnetic induction (magnetic field intensity).
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The electric potential in a region that is within 2. 00 m of the origin of a rectangular coordinate system is given by V=Axl+Bym+Czn+D, where A, B, C, D, l, m, and n are constants. The units of A, B, C, and D are such that if x, y, and z are in meters, then V is in volts. You measure V and each component of the electric field at four points and obtain these results:Point (x,y,z)(m) V(V) Ex(V/m) Ey(V/m) Ez(V/m) 1 (0, 0, 0) 10. 0 0 0 0 2 (1. 00, 0, 0) 4. 0 16. 0 0 0 3 (0, 1. 00, 0) 6. 0 0 16. 0 0 4 (0, 0, 1. 00) 8. 0 0 0 16. 0
Use the data in the table to calculate A.
Use the data in the table to calculate B
Use the data in the table to calculate C
Use the data in the table to calculate D
Use the data in the table to calculate E
Use the data in the table to calculate l
Use the data in the table to calculate m
Use the data in the table to calculate n
6. An electromagnet contains 2000 turns in its length. A current of 2.5 A provides a lifting
force of 100 N.
a) What current would be required to provide a lifting force of 300 N?
b) If the current is 2.5 A, how many turns would be required to provide a lifting force of
600 N?
a) The lifting power of an electromagnet is proportional to the current and the number of revolutions.
To calculate the current necessary to create a lifting force of 300 N, use the proportion:
(current) / (2000 turns) = (300 N) / (100 N)
When you solve for current, you get:
current = (2000 turns) * (300 N) / (100 N) = 6 A
b) The percentage may be used to calculate the number of spins necessary to create a lifting force of 600 N:
(2000 turns) * (2.5 A) = (number of turns) * (2.5 A)
If you solve for the number of turns, you get:
2000 turns = (2000 turns) * (2.5 A) / (2.5 A).
The current is already 2.5 A, and no matter how many revolutions it has, it cannot raise any more than 100N. To lift 600N, you have to increase the current.
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What is an objects mass if it has a force of 8N acting upon a radius of 10m and traveling at
8m/s? (round to two decimal places)
An objects mass if it has a force of 8N acting upon a radius of 10m and traveling at 80
find the mass of an object with a force?Newton's second law of motion states that force equals mass times acceleration: F = ma. If you know the net force on the object, and it's acceleration, you can rearrange this formula to find the mass: m = F / a. Force is measured in N (newton), which you can also write as (kg * m)/ s2Force equals mass time acceleration. Weight is a force and it can replace force in the equation. The acceleration would be gravity, which is an acceleration. F = m * a.The force, 'F' is applied to the body given by, F = m . a. Here, mass is a measure of its resistance to acceleration when a force is applied to the bodyTo learn more about mass of an object refers to:
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Match each plant structure to its function.
trichome
stoma
chloroplast
roots
Options
allows gases to enter and exit the plant
absorbs water and nutrients from soil
converts water and carbon dioxide to sugar
collects water and nutrients from air
Water, nutrients, and photosynthates are transported throughout the plant due to the structure of the plant's roots, stems, and leaves.
What are the major parts of plant structure and its functions?Trichomes help plants grow and develop by protecting them from UV light, insect predation, and excessive transpiration.A stoma is a small opening in the abdomen used to empty waste from the body, such as feces and urine, into a collection bag. You may require a stoma for a variety of reasons, including having a section of your bowel removed.Photosynthesis and oxygen-release processes in chloroplasts generate energy, which supports plant growth and crop yield. Chloroplasts are therefore in charge of the biosynthesis of active compounds such as amino acids, phytohormones, nucleotides, vitamins, lipids, and secondary metabolites.The primary function of the root is to absorb water and dissolved minerals and transport them to the stem, as well as to store reserves.To learn more about structure of plant refer to :
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What type of force is applied to a moving object. it causes the object to slow down or stop because it acts in the opposite direction of motion?
Friction is a force that is applied to a moving object. it causes the object to slow down or stop because it acts in the opposite direction of motion.
Friction opposes the motion. A force that prevents two materials from moving in relation to one another is friction.
When one object, fluid, or material is moved in relation to another, it produces this force, which always acts in the opposite direction of the motion. Some actions require friction, yet others are hindered by it.
Following are the three types of friction
Rolling friction sliding friction Fluid frictionExample include:
putting on the brakes to make an automobile go slower. Wheel rotors are subjected to pressure from brake pads. This pressure causes friction, which turns the car's kinetic energy into heat.
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Look at the distance-time graph below. It shows Angela's journey as she walks to the end of the road and back. The gradient of the graph represents Angela's __________. What one word completes the sentence?
The gradient of the graph represents Angela's speed.
What is meant by speed?Speed is the distance an object travels divided by the time it takes to cover that distance.Speed is a scalar quantity, meaning it has only magnitude and no direction.Speed can be measured in units such as meters per second, miles per hour, or kilometers per hour.The speed of an object can be determined by measuring the distance it travels and the time it takes to travel that distance.The average speed of an object is the total distance traveled divided by the total time elapsed.An object can have a constant speed, meaning it is moving at a steady rate, or it can have a changing speed, meaning its rate of motion is changing.Speed is often represented graphically by a distance-time graph, where the slope of the graph represents the speed of the object.Speed can also be represented by a velocity vector, which includes both the magnitude and direction of an object's motion.The concept of speed is closely related to that of velocity, which is the rate of change of an object's position in a given direction.Speed can also be described as the magnitude of velocity.Speed is an important concept in physics, engineering, and many other fields, and is used to describe and analyze a wide range of phenomena, from the motion of vehicles to the spread of disease.To learn more about speed refer:
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Thank you for your help!!
How do we know if kinetic energy is zero?
We can find out if Kinetic Energy is zero or not by using the equation for Kinetic Energy.
Kinetic Energy is defined as the energy an object that it contains by virtue of its motion. It is given by a simple equation:
Kinetic Energy = 1/2 * mass * velocity²
To know if the kinetic energy of an object is zero, we need to determine its velocity. If an object is at rest, its velocity is zero, and therefore, its kinetic energy is also zero.
Alternatively, you can use the equation mentioned above, if you know the mass of the object you can calculate kinetic energy by substituting the velocity with zero.
However, an object with zero kinetic energy doesn't mean it can't have potential energy, for example an object at the top of a hill has zero kinetic energy but it has potential energy due to its position.
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When society gets the most it can from its scarce resources, the outcome is called:
a. equitable
b. efficient
c. normal
d. efficacious
When society gets the most it can from its scarce resources, the outcome is called is efficiency option - b is correct answer.
What are the scarce resources in society?We live in a world where human needs are limitless, but there is a finite amount of land, labor, and capital available to meet those needs. When deciding how to distribute scarce resources, choices must be made due to the conflict between society's limitless wants and our finite resources.
Efficiency means that society makes the most of its limited resources. Equity refers to the equitable distribution of the advantages of those resources among all of society's participants.
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based on the graph you made for the superposition of and , would you consider the superposition to be simple harmonic oscillation? why or why not. based on the graph you made for the superposition of and , would you consider the superposition to be simple harmonic oscillation? why or why not. no. it is not a simple sine or cosine curve. yes. it keeps returning to the equilibrium position. no. waves and simple harmonic oscillation are two unrelated phenomena. yes. the pattern clearly repeats regularly.
Based on the graph you made for the superposition of the two waves, you can see that the pattern repeats regularly and returns to the equilibrium position, which indicates that it is a simple harmonic oscillation.
The shape of the graph is not a simple sine or cosine curve, but the regular repetition of the pattern is the key indicator that it is a simple harmonic oscillation.
Simple harmonic oscillation is a type of periodic motion in which an object moves back and forth, following an approximately sinusoidal path. This type of motion is often observed in systems such as springs, pendulums and other mechanical systems. It is characterized by a specific frequency and amplitude, which are related to the mass, spring constant and damping coefficient of the system.
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25.the two charged conductors are touched mutually and then separated. what will be the charge on them?
Both the conductors will have the same charge. When they touched mutually the charge flowed from higher potential to lower potential
According to the property of charge, it always flows from high potential to lower potential. In the same as water flows in a river, the charge also flows in the same manner. And if two water bodies have been linked mutually both have the level of the water as same as others have.
Similarly, the charged body also behaves in the same manner at the end both bodies will have the same charge. The case of capacitor is different with certain conditions in the orientation of body.
Let charged conductor a have q charge and conductor b has w charge After touching mutually they both will have (q+w)/Total capacitance of each and both, the conductors will have (q+w)/Total capacitance Charge.
and the total charge of both bodies will be q+w.
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According to current scientific thinking, how did the solar system that contains earth form?
"According to current scientific thinking, the solar system that contains earth formed by solar nebula."
Our Solar system formed from solar nebula.
The solar system was once a concentration of gas and materials like dust that was formed a big swirling disk of gaseous cloud called Solar nebula.
The core of the Solar nebula was so concentrated and dense that is created large body of hydrogen and helium gas called the Sun.
The solar nebula's Sun served as its centre, and other planets developed around it from gases and dust.
Thus, according to current scientific thinking, the solar system that contains earth formed by solar nebula.
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Which of the following equations is correctly blanaced , N2 + 3H2 > 2NH3 , H2 + O2 > H20
The correctly balanced equation is [tex]N_2 + 3H_2 -- > 2NH_3[/tex]. Option 1.
What is a balanced equation?A balanced equation is a chemical equation that obeys the law of conservation of atoms. In other words, a balanced equation would have the same number of atoms of different elements in the reactants and products of the reaction. Because of the law that states that:
atoms can neither be created nor destroyed in the course of chemical reactions but can be converted from one form to another.Thus, in the first equation, there are 2 atoms of N and 6 atoms of H in the reactants. These same numbers are in the product.
In the second equation, There are 2 atoms of H and 2 atoms of O. In the product, there are 2 atoms of H but only 1 atom of O. This is not balanced.
In other words, the only balanced equation is [tex]N_2 + 3H_2 -- > 2NH_3[/tex].
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imagine a person is sitting on a beach and a speedboat passers-by on the water draw a model of the situation and indicate how's the Doppler effect would influence has the sand waves coming from the boat would be perceived by the person on the Shore
If you are moving into a wave, its frequency will appear to you to be higher, while if you are traveling in the same direction as the waves, their frequency will appear to be lower.
What is meant by frequency ?
The frequency of a repeated event is its number of instances per unit of time. It differs from angular frequency and is sometimes referred to as temporal frequency for clarification.The unit of frequency is hertz, or one occurrence per second.Frequency is the measure of the number of cycles or periods per second.The hertz is the SI unit for frequency.The number of waves that pass a specific place in a predetermined period of time is known as the wave frequency. The hertz, which measures wave frequency in SI units, is one wave crossing a fixed point in one second.To learn more about frequency refer to
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PLs help me dont steal point plssssssss :(
The graph shows the acceleration of a 5 kg object over time
What is the net force acting on the object
The mass of the object increases from 5 kg to 6kg and the net force on the object remains the same what will happen to the acceleration of the object will it decrease increase or stay the same
Explain reasoning
The acceleration of the object would be found to stay the same.
What happens to the acceleration?Let us note that the acceleration would have to do with the rate at which the velocity of the object would change with time. In the case that we have here, we can see that there is a point where the net force is the same as we can see on the graph.
We know that it is a change in the net force that is acting on the object that would cause the object to be accelerated as such if the net force stays as a constant then the acceleration of the object would also stay the same.
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in the bohr model of the hydrogen atom, an electron moves in a circular orbit around a proton find the magnitude of the electric force exerted on each particle
Bohr's model helped to explain how electrons could only change orbits by exchanging or absorbing energy in fixed quanta.
For instance, if an electron jumps into an orbit that is one orbit closer to the nucleus, it will have to expel energy equal to the energy difference between the two orbits.
A small positively charged nucleus is encircled by rotating negatively charged electrons in set orbits, according to the Bohr Atomic Model.
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The wavelength of a wave doubles as it travels from medium a into medium b. The wave in medium b has ________ compared to wave in medium a.
The correct answer, number, 4) twice the frequency. When a wave travels from one medium to another, the wavelength doubles, but the frequency is unchanged. This means that the wave has twice the frequency in the second medium, compared to the first.
When a wave travels from one medium to another, the wavelength doubles, but the frequency remains unchanged. This means that the wave has twice the frequency in the second medium, compared to the first. For example, if a wave has a frequency of 10 Hz in the first medium, then it will have a frequency of 20 Hz in the second medium.
Complete question:
The wavelength of a wave doubles as it travels from medium A into medium B. Compared to the wave in medium A, the wave in medium B has:
(1) half the speed
(2) twice the speed
(3) half the frequency
(4) twice the frequency
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hypothermia is an excessive decline in a body temperature.
"hypothermia is an excessive decline in a body temperature" - True.
What is the hypothermia?Extreme cold exposure can result in severe complications including frostbite and hypothermia (an unusually low body temperature).
The body temperature must be above 35°C to avoid hypothermia. This can happen after a protracted period of being exposed to temperatures below 10°C or after a protracted period of being submerged in water that is below 20°C. Hypothermia may prevent a person from realising that they need to get help.
Hypothermia is characterised by shivering, shaky hands, and/or reduced mobility. Speak incoherently. Unexpected low energy or weariness. unexpected perplexity (unable to think clearly).
Thus, the given statement is true.
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relative to the ground below, how many joules of pe does a 1000n boulder have at the top of a 5m ledge? if it falls, with how much ke will it strike the ground? what will be its speed on impact?
Potential energy of the boulder = 1000 N x 9.8 m/s^2 x 5 m = 49,000 Joules
Potential energy = mass x gravity x height
Kinetic energy = 1/2 x mass x velocity^2
As the boulder falls, it gains kinetic energy and loses potential energy, so the kinetic energy at impact is equal to the potential energy at the top of the ledge.
Kinetic energy at impact = 49,000 Joules
Velocity at impact can be found using the equation:
Velocity = √(2 x kinetic energy / mass)
Velocity at impact = √(2 x 49,000 J / 1000 N) = √98 m/s = 9.9 m/s
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