A teach sounds its horn as it techniques an intersection. the horn can simply be heard at a stage of 48 dB through an observer 10 km away: A. P= 315.667W, B. β=one hundred.37dβ.
Factor of intersection manner the factor at which traces intersect. these strains are represented through the usage of the equation a1x + b1y + c1= zero and a2x + b2y + c2 = 0, respectively. Given discern illustrate the thing of the intersection of lines. we can discover the factor of the intersection of three or extra traces additionally.
Calculation:-
Tajenotay of pom Ward
B= 1 15 |S)= + => sixty four> 10 Jen [ ee wie]
L> Ts 2-542x% 10° wim?
power generated by using horn
tos Pa RS> > Pz Tan?
—+P= 2-512 106 Wim? x47 [ 104 m)2
= slaB= tp dey zat)
Gg= 24S: COW
Jog AR (forty eight m)*
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TRUE/FALSE. initial discovery of radioactivity and how it was thought to be the same as another type of light energy emission
Initial discovery of radioactivity and how it was thought to be the same as another type of light energy emission is true statement.
Henri Becquerel made the initial discovery of radioactivity. She investigated the characteristics of x-rays, which Wilhelm Roentgen had discovered in 1895, using naturally fluorescent minerals. In the belief that the uranium would absorb the sun's energy and then release it as x-rays, he placed potassium uranyl sulphate on photographic plates covered in black paper and exposed them to the sun.A study released earlier this month by the Global Carbon Project (GCP), a team of scientists who monitor emissions, predicts that CO2 emissions will increase by 4 point 9 percent in 2021 compared to the previous year.
Due to the COVID-19 pandemic and related lockdowns, emissions decreased by 5 point 4 percent in 2020.
With a 40% share and increasing, the energy sector remains the main source of greenhouse gas emissions.
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Timmy throws a ball upward As it falls, it is caught at the same height as it was thrown. What are the signs of the Vertical positions, velocity, and acceleration during the downward part of the trajectory of the ball?
The vertical positions, velocity, and acceleration during the downward part of the trajectory of the ball are given as +Y, +V, and +a respectively.
What are the signs of the velocity, acceleration, and vertical position of a ball that is falling downwards?The motion of an object in a given direction may be considered a positive or negative motion depending on a given conventional direction.
The downward motion of an object toward the earth's surface is considered a positive motion while the upward motion of an object against the gravitational pull of the earth is considered a negative motion.
The vertical positions, velocity, and acceleration of an object falling under gravity are positive.
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A body falls freely from rest on Earth [tex](g=-10 \mathrm{~m} / \mathrm{s}[/tex] )
1. The displacement at [tex]t=3 \mathrm{~s}[/tex] is
The displacement of the body falling freely from rest after t = 3 s is 45 m.
What is displacement?The displacement is simply the difference in the position of the two marks and is independent of the path taken when traveling between the two marks.
To calculate the displacement of the body, we use the formula below.
Formula:
s = ut+gt²/2Where:
s = Displacement of the objectt = Timeg = Acceleration due to gravityu = Initial velocityFrom the question,
Given:
u = 0 m/st = 3 sg = 10 m/s²Substitute these values into equation 1
s = (0×t)+(10×3²)/2s = 45 mHence, the displacement of the body is 45 m.
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which statement best describes what happens during this process?
The opposite charges are pulled away in solution and become free. Option D
What is solvation?We know that when we add an ionic substance into water that the ionic substances would become dissolved in the water. The meaning of this is that the ions that are in the substance would be drawn apart by the molecules of water. The process that makes the ions to be drawn apart by water is what we call solvation.
Now when there is solvation, we would notice that the positive end of the water dipole would surround the negative ion and the negative part of the water dipole would surround the positive ion.
Here we can see that the chloride ion is surrounded as such as so also is the potassium ion. This would lead to the pulling apart of the ions by the water and they become free in solution.
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name five (5) keys to a successful strategic partnership (note: there are more than 5, but you only need to identify any 5) (note: you don't have to describe them, only name them)
The (5) keys to a successful strategic partnership are:
-Creating trust
- Have shared vision and objectives
-There should be personal relationships
-Mutual benefits and needs
-Total commitment and top management support
What are the The (5) keys to a successful strategic partnership about?Strategic Partnership is Important for attaining competitive performance that benefits both the buyer and the supplier, as well as a strategic position as opposed to a tactical one
Successful strategic partnerships need both sides to commit over an extended period of time to working together for their mutual advantage, exchanging pertinent information and the risks and rewards of the connection.
Therefore, Partners are more ready to cooperate, find compromise solutions to issues, work toward obtaining long-term advantages for both parties, and go above and above when there is trust between them. It is essential for both spouses to have a common vision and mutually accepted goals.
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Stars begin burning helium to carbon when the temperature rises in the core. This temperature increase is caused by.
When the core temperature rises, stars start burning helium to carbon. This rise in temperature is brought on by. creating helium by fusing hydrogen in a shell.
What occurs when a star begins to burn helium?When carbon and helium are combined, oxygen is created. Helium burns to create carbon. The star's surface temperature rises as it develops into a horizontal branch star as its core becomes rich in carbon and oxygen nuclei. When their brilliance remains constant, stars with masses larger than or equal to the Sun shrink and get hotter.
What changes as the core temperature of a star rises?When it becomes heated enough, hydrogen in a shell outside the core can begin to fuse. The exterior is expanding.
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you have three light bulbs; bulb a has a resistance of 240 q, bulb b has a resistance of 192 q, and bulb c has a resistance of 144 q. each of these bulbs is used for the same amount of time in a setup like that in the drawing. in each case the speed of the rod and the magnetic field strength are the same. rank the setups in descending order, according to how much work the hand in the drawing must do (largest amount of work first).
The correct sequence will be: A, B, C
Given,
Resistance A = 240 Ω
Resistance B = 192 Ω
Resistance C = 144 Ω
We know that the resistance has relations with Current (I) and Voltage (v)
But to find the work done by the hand,
We will apply the formula of the work,
W = VIt
Replacing V with R/I
Work = (R/I)*I*t
Work= R*t
The time given is same.
So here,
Work = Resistance,
By this derivation, the highest resistance will do the highest amount of work.
Therefore, the work done by Resistance A will be the most and then the work by resistance B and then the work by resistance C.
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why would it be advantageous to use super conductor in MRI machine?
Advantages of superconducting MRI systems include better performance, the highest temporal and spatial homogeneity of the magnetic field, high signal-to-noise ratio (SNR), the shortest scan time, and the highest patient throughput.
What is MRI?
Radiologists employ magnetic resonance imaging (MRI) as a medical imaging technology to create images of the body's anatomy and physiological functions.
Strong magnetic fields, magnetic field gradients, and radio waves are used in MRI scanners to provide images of the body's organs.
MRI differs from CT and PET scans in that it does not utilize X-rays or ionizing radiation. Nuclear magnetic resonance (NMR) has several medical applications, including MRI.
NMR can also be used for imaging in other NMR applications, like NMR spectroscopy.
In hospitals and clinics, MRI is frequently used for disease staging, diagnosis, and follow-up.
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a wiggle in time is a
Answer:
A wiggle in time is called vibration. A wiggle in space and time is called wave. A wave is disturbance over the space. Distinguish between the propagation of sound waves and the propagation of light waves. Sound waves are mechanical waves.
A rock has a mass of 15 grams and a volume of 5 cm3. What is the density of the rock?.
Answer:
3.0 g/cm³
Explanation:
To find the density of a substance when given the mass and volume we use the formula
Branliest if u can!
A 10.00kg ball moving at 1,7m/s collides with a 5.00kg ball at rest. If the velocity of the heavier ball is 3,4m/s after the collision, how much velocity will the lighter ball have?(after the collision)
The velocity of Ball B be after the collision is 3.4m/s.
Please explain the law of conservation of momentum and provide two examples.For a collision between two bodies, in accordance with the law of conservation of momentum. Total kinetic energy prior to impact equals total kinetic energy following impact. m1u1+m2u2=m1v1+m2v2. For instance, a gun will recoil after firing a shot. A certain amount of force is applied when the shot is fired and leaves the barrel.
Using the law of conservation of momentum;
mAuA+ mBuB = mAvA+mBvB
Substitute the given values
10(1.7) + 5(0) = 10(3.4) +5vB
17 + 0 = 34 +5vB
17-34 = 5vB
-17 = 5vB
vB = -3.4
vB =3.4m/s
Hence the velocity of Ball B be after the collision is 3.4m/s.
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Consider a field of insects, all of which have essentially the same mass.
a. If the total momentum of the insects is zero, what does this imply about their motion?
b. If the total kinetic energy of the insects is zero, what does this imply about their motion?
If the total momentum of the insects is zero, this means all of the insects are at rest or are moving in opposite of each other. Same if the total kinetic energy is zero.
What is momentum?Momentum is the quantity of motion which is multiplied by the amount of matter moved i.e., mass and the velocity at which it moves. Because, the object is in motion, it is a vector quantity, it has both direction and magnitude. It is determined by the product of the object's mass and the velocity of object.
If the total momentum of the insects is zero, this could mean anything of the two things. Either, all of the insects are at rest or an equal amount of insects are moving in opposite direction of each other which cancels out the total momentum of the insects.
If the total kinetic energy of the insects is zero, this means either all of the insects are at rest or an equal amount of insects are moving in opposite direction of one another which results into canceling out the energy.
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Two carts on an air track have the same mass and speed and are traveling toward each other. If they collide and stick together, find the total momentum and total kinetic energy of the HINT (a) the total momentum O The final momentum is zero. The final momentum is half the initial momentum. O The final momentum is twice the initial momentum. O There is not enough information to tell. (b) the total kinetic energy O The final kinetic energy is zero. OO The final kinetic energy is half the initial kinetic energy. The final kinetic energy is twice the initial kinetic energy. O There is not enough information to tell. (c) Describe a different colliding system with this same final momentum and kinetic energy.
if they collide and remain united then the. Total momentum of the system is zero.
Total momentum by using the Principle of Momentum Conservation.
mVa-mVa=2Vb
final speed and total momentum of system =zero
p=0
Due to the inellastic impact and the same masses and speeds, the system's total kinetic energy is reduced to zero. Before and after a collision, the total kinetic energy are, respectively:
Ka=mv^2
Kb=0
Momentum is the result of a particle's mass and velocity. A vector quantity with both magnitude and direction is momentum. Isaac Newton's second equation of motion states that the force applied to a particle is equivalent to the time rate of change of momentum.
Any grouping of particles has a momentum equal to the vector sum of their momenta. A modification in one particle's momentum is perfectly balanced by a modification in the momentum of another particle, according to Newton's third law, which states that particles exert equal and opposite forces on one another.
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astronomers can now report that active star formation was going on at a time when the universe was only 20% as old as it is today. when astronomers make such a statement, how can they know what was happening inside galaxies way back then? a.they look at a graph that shows the way galaxy redshifts change with time b.they examine the spectra of galaxies (or the overall colors of galaxies) with the highest redshifts they can find c.they look at radio waves coming from nearby active galaxies d.they look at the elements in comets, which formed when our solar system was first forming e.they look at the open clusters in the milky way galaxy
Astronomers can now report that active star formation was going on at a time when the universe was only 20% as old as it is today. when astronomers make such a statement, they examine the spectra of galaxies (or the overall colors of galaxies) with the highest redshifts they can find.
SO option B is correct.
Who are Astronomers?An astronomer is described as a scientist in the field of astronomy who focuses their studies on a specific question or field outside the scope of Earth by observing astronomical objects such as stars, planets, moons, comets and galaxies – in either observational or theoretical astronomy.
Astronomers are known to use redshifts to measure how the universe is expanding, and thus to determine the distance to our universe's most distant and therefore oldest objects.
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three balls are in water. ball 1 floats, with half of it exposed above the water level. ball 2, with a density less than the density of water is held below the surface by a cord anchored to the bottom of the container, so that it is fully submerged. ball 3, of same radius as ball 2, but of greater mass, is suspended from a rope so that it is fully submerged.
The correct statement about the ball 1 is the magnitude of buoyancy force is equal to that of ball's weight.
The upward force exerted on an object that is wholly or partially immersed in a fluid is called upthrust.
Ball 1 is floating on water.
Weight of the ball 1 is Fg = m₁g is acting vertically downward.
Force of buoyancy Fb = ρvg is acting vertically upwards
Net force acting on the ball is zero, Fg = Fb
As the ball 1 floats without sinking, it is in equilibrium.
This means that the net downward force is balanced by the net upward force.
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Deduce the quark content of a particle with charge +e+e, baryon number 00, and strangeness +1+1
A particle with charge +e, baryon number 0, and strangeness +1 may content three quarks according to charge conservation along with other fundamental particles.
What is quark?Particle physicists started to understand in the 1960s that quarks, not hadrons, are what make up hadrons, which are not truly elementary particles. (The word "quark" was first used by physicist Murray Gell-Mann in the James Joyce novel Finnegans Wake.) At first, it was thought there were just three sorts of quarks: up (u), down (d), and strange (s). However, this number quickly increased to six, which is interestingly the same as the number of leptons, to include charmed (c), bottom (b), and top (t).
Quarks may have charge of either +2/3e or -1/3e, baryon number 1/3 and strangeness number either 0 or -1.
So, a particle with charge +e, baryon number 0, and strangeness +1 may content three quarks according to charge conservation along with other fundamental particles.
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the unit of work is the _______.
The unit of work is the Joules.
What is work?Work is a measure of energy expended in moving an object; most commonly, force times distance. It is said that no work is done if the object does not move.
Joules is the International System of Units (S.I unit) and the derived unit of energy, work and heat. It represents the work required to exert a force of one newton for a distance of one metre. Joules has a symbol J.
Joules is a unit named in honour of the English physicist James Prescott Joule and it equals 10⁷ ergs, or approximately 0.7377 foot-pounds.
Based on the above, it can be said that joules (J) is the unit of work.
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Problem 12.41 9 of 9 Review A 50 g mass rotates in a vertical plane--call it the xy-plane with the y-axis pointing up--at the end of a 75-cm-long, massless, rigid rod. The other end of the rod is attached to a frictionless pivot at the origin. Part A What is the gravitational torque about the pivot when the mass is 60° above the +x-axis? Give your answer using unit vectors. Express your answer in newton-meters. Enter components of torque, separated by comma. IVO AE ? Tx, Ty,Tz = N·m Submit Request Answer
The value of gravitational torque after solving the expression will be equal to -0.18375 N.mz.
What is Torque?The rotating equivalent of a force in physics or mechanics is called torque. Depending on the topic matter, it may also be referred to as the moment, point in time of force, rotating force, or turning effect. It symbolizes a force's capacity to cause a change inside the bodies natural rotational motion.
As per the given information in the question,
Mass, m = 50 g
Length, l = 75 cm
Gravitational force, [tex]\vec F[/tex] = -mgy
Then, the position vector of the particle will be,
[tex]\vec \tau[/tex] = l(cos 60° x + sin 60° y) × (-mgz)
= -0.18375 N.mz
Therefore,
[tex]\tau_x, \tau_y,\tau_z=0, 0, -0.18375[/tex]
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A simple pendulum consists of a sphere tied to the end of a string of negligible mass. The sphere is pulled back until the string is horizontal and then released from rest. Assume gravitational potential energy is zero when the sphere is at its lowest point. What angle will the string make with the horizontal when the kinetic energy and the potential energy of the sphere-earth system are equal?.
Less than 45° would be the angle that the string would create horizontally if the sphere-Earth system's kinetic and potential energies were equal.
What is gravity, and what is an example?The pull that binds the gases in the sun together is one illustration of the gravitational force. a ball you throw in the air will come crashing down due to this force. the force that keeps an automobile from coasting downhill even when the gas is off.
What does the name "gravitation" mean?Our term gravity and its more specific derivation gravitation are derived from the Latin word gravitas, from gravis (heavy), which in turn derives from an even older root word that is believed to have existed due to multiple cognates in related languages.
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Which type of mass movement do you think is the least dangerous. Explain your answer!
It is a sluggish, protracted mass movement called creep soil.
What forms of mass movements are there?Creep, Fall, Slip, Flow, Solifluction, Rock Glaciers, Slumping (Earthflow), Mudflow (Lahar), Debris Flow, Debris Slide, Debris Avalanche, Rockslide, Rockfall, and Debris Fall are a few examples of mass movement types.
What kind of mass movement occurs gradually?The very slow, frequently continuous migration of regolith down slope is known as creep. Almost all slopes experience creep, but the rates vary.
Which kind of mass mobilization is the most harmful?A landslide is the most harmful kind of mass movement and happens when rock and dirt suddenly slip down a steep slope.
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when striking, the pike, a predatory fish, can accelerate from rest to a speed of 4.0 m/s in 0.14 s .
The distance of the strike that accelerated from rest to a speed of 4 m/s is 0.301 m.
The speed of an object at a particular instance of time while its moving or covered some distance or just started moving.
The distance covered will be 0.301m.
firstly we will new to calculate acceleration (a).
we can do so using newtons first law of motion.
v=u + a × t
where
a is the acceleration
t is the time
from here we get
a=(v-u)/t
a=(4-0)/0.15
a=26.67m/s²
using newtons second law of motion
s=u.t+1/2at²
where s is distance travelled in t seconds.
we get,
s=0.301m
Therefore according to newton's law of motion, the distance of the strike that accelerated from rest to a speed of 4 m/s is 0.301 m.
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waves a and b shown above are propagating in the same medium. 1) how do their frequencies compare?
The more the distance between the two crests or two troughs more will be the wavelength and the lesser the frequency of the wave. Therefore, the frequency of wave A is less than the frequency of B in the attached diagram below.
What are frequency and wavelength?The frequency of the wave can be defined as the number of oscillations in one second and can be represented as per second or hertz (Hz).
The wavelength can be defined as the distance between the two adjacent two crests or troughs on a wave that is separated by a distance.
The relationship between wavelength (λ) of the wave, frequency (ν) of the wave, and speed of light (c) is:
c = νλ
The distance between the two crests for wave A has greater than that of wave B. Therefore, the wavelength of wave A is greater than wave B. The frequency of wave A is lesser than wave B.
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PRELAB: A MODEL FOR CIRCUITS III: CAPACITORS AND RC CIRCUITS
1. Predict the change in capacitance of a parallel plate capacitor as the area of the plates is increased.
2. Predict the change in capacitance of a parallel plate capacitor as the separation between the plates is increased.
3. Briefly describe the observations you will make in Activity 1-2 of the lab to test one of these two predictions.
4. If you have two identical capacitors, what do you predict will be the capacitance of the two connected in parallel?
5. Briefly describe the observations you will make in Activity 2-1 of the lab to test this prediction.
6. What devices will you use to measure the decay of voltage in an RC circuit?
A parallel plate capacitor has a capacitance of C=fracepsilon_0 Ad, where A is the area of the plates and d is the distance between them. 1) If the area of the plates A_1 grows, then A_1>A C_1=fracepsilon_0 A_1d>fracepsilon_0 Ad C_1>C, which means that the capacitance also grows.
2) If the distance between the plates is increased by d_1, the capacitance decreases because d_1>d C_1=fracepsilon_0 Ad_1 fracepsilon_0 Ad C_1C.
3) Since capacitance is directly proportional to plate area, capacitance also increases with plate area.
Because capacitance is inversely proportional to plate separation, capacitance decreases as plate separation increases.
4) When two identical capacitors are connected in parallel, their equivalent capacitance is C_1 C_1=C+C=2C. 6) The Voltmeter is the device used to measure the voltage decay in an RC circuit.
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An element with 19 protons and 19 electrons gains one electron and results in what species?.
Potassium atoms have one valence electron in the outer shell, 19 protons, and 19 electrons. According to the periodic chart, sodium, the alkali metal above potassium, is thought to be chemically similar to potassium.
Which of the following best describes an atom made up of 21 neutrons, 19 protons, and 19 electrons?Potassium's atomic structure. 19 protons and 21 neutrons make up the nucleus. 19 electrons surround the nucleus, with one extremely unstable electron in the outer shell (ring). The stability of an element's outer electrons governs both its chemical and physical properties.
Which element's atoms' nuclei contain 19 protons?Potassium's most prevalent isotope has a total of 20 neutrons. The stable potassium isotopes.
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what characteristics must earth's core have to generate a magnetic field?
Other molten metals such as iron. A magnetic field is produced when electrical charges pass through the Earth as a result of the Earth's spin, which also causes the core to spin.
What is magnetic field ?
It usually represents the region around the magnet where its force can be felt. We use the magnetic field as a tool to describe how the magnetic force is distributed in the space around and within something magnetic in nature.
A planet must fulfil three conditions in order to produce a magnetic field: 1) a molten, electrically conducting interior; 2) convection in the interior; and 3) a moderately rapid rotation. This sets up a process that is somewhat similar to a naturally occurring electrical generator, where the convective kinetic energy is converted to electrical and magnetic energy. Of the four terrestrial planets, Earth has the strongest magnetic field.
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in eeg brain wafves the unit of amplitude i s
According to the given statement In EEG brain waves the unit of amplitude is microvolts (mV)/ 10 e-6 V.
How is amplitude measured?In most cases, amplitude is assessed by looking at a wave graph and determining the elevation of the pulse from rest. The amplitude or power of the wave is gauged by its amplitude. For instance, the height of a sound wave will indicate the volume of the sound.
What are voltage and amplitude?The peak amount of a current or voltage is its amplitude. One or both of the sharp phases of a sine wave can be used to symbolize it. The peak voltage is another name for this voltage level, which might be positive or negative. Positive and negative solely describe the flow of current.
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Why do you think that waves traveling through basalt have a higher seismic velocity than a wave traveling through sand?.
Answer: Basalt is denser than sand
Explanation:
Seismic waves are mechanical waves (meaning, they must pass through a medium). Because basalt is denser than sand, a seismic wave will travel faster through basalt. The atoms of basalt are more tightly packed together than the atoms of sand. Collisions between atoms of basalt are more frequent because they are closer together, therefore the kinetic energy is higher. The higher the kinetic energy, the higher the velocity of the wave.
A bullet of mass 7.5 g that is moving at a speed of 483 m/s embeds itself into a tree, penetrating 19.4 cm into the wood.What is the magnitude of the average force, in N, exerted by the tree on the bullet? sig.gif?tid=4T78-AC-85-4A-844D-22357F =
The average force by which the bullet will hit the tree is F = 4.50945 × [tex]10^4[/tex] N .
Given : mass of the bullet = 7.5 gram
u or intial velocity = 483 m/s
v or final velocity = 0 m/s
h or height = 19.4 cm
v² = 2as + u²
0 = 38.8 a + 483 × 483
- 483 × 483/ 38.8 = a
thus acceleration = 6012.6 m/s²
F = ma
Thus on substituting the values we get
F = 7.5 × 6012.6
F = 45,094.5 N
or
F = 4.50945 × [tex]10^4[/tex] N
The magnitude of the average force is F = 4.50945 × [tex]10^4[/tex] N .
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FILL IN THE BLANK. power supplies all provide the same voltages to a system, such as 3.3v, 5v, and 12v. each of these can be referred to as a___, because each one comes from a specific tap within the power supply.
Linear regulated because each one comes from a specific tap within the power supply.
What are the four power supply stages?The four main processes shown in a block diagram of a regulated DC power supply are step down transformation, rectification, DC filtration, and regulation. Unregulated power supply and regulated power supply are the two categories that define DC power supply designs. The controlled power supply can be switched or linearly regulated.
What three types of power supplies are there?Battery-based, switched, or linear? Regulated power sources can be divided into three categories: battery-based, switching, and linear. Although switching and battery power have advantages, linear is the least complex of the three fundamental regulated power supply systems.
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What can I do to make this less expensive, with less cargo damage, and with a sturdy shell condition? Anything less than the amount shown in the image.
The external part of the shell is made of fiberglass. This is probably very expensive. The production team of the above product should experiment with Graphene.
Why should Graphene be considered for the above project?It should be highlighted that graphene is already being utilized in transportation, medical, electronics, energy, defense, and desalination; graphene research is having a significant influence across a wide variety of sectors.
To put things in perspective, one square meter of normal paper is 1000 times heavier than graphene, while a single sheet of graphene large enough to cover a football field weighs less than a gram. Strongest. With a tensile strength of 150,000,000 psi, graphene outperforms steel and Kevlar.
Graphene, a single sheet of carbon atoms, has been hailed as the strongest substance known to man, 200 times stronger than steel, lighter than paper, and with amazing mechanical and electrical capabilities.
Given that graphene is formed of carbon, and carbon is in plentiful supply, it will very certainly be less expensive than fiberglass.
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