Note for information: For details on the usage of single-pole circuit breakers as the disconnecting mechanism, see 240.15(B).
In order to simultaneously disconnect all ungrounded wires at the branch circuit's origin, each multiwire branch circuit must be equipped with this capability.
Branch circuits that fall within this article's definition must be allowed as multiwire circuits. It is okay to think of a multiwire circuit as having numerous circuits. The same panelboard or other similar distribution equipment must be the source of all wires in a multiwire branch circuit.
Each multiwire branch circuit must group its grounded and ungrounded circuit cables in accordance with 200.4. (B).
All loads must be supplied by line-to-neutral multiwire branch circuits.
The first exception is a multiwire branch circuit that serves a single piece of used equipment.
Exception No. 2: The multiwire branch circuit's ungrounded wires must all be opened simultaneously by the branch-circuit overcurrent mechanism.
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A crane lift a pallet of brick to the top of a 80 m building, requiring 400 kJ of energy. What wa the ma of the pallet?
A kier, with a ma of 70 kg, loe 140 kJ of energy when kiing down the lope. What wa the height which the kier decended
The height which the kier descended can be calculated using the formula: h = E/M, where h is the height descended, E is the energy lost and M is the mass of the kier. In this case, the height would be 140 kJ/70 kg = 2 m.
What is the energy ?Energy is the capacity to do work; it is a measure of the amount of activity or effort that is expended in a given period of time. It can be found in many different forms, such as kinetic energy, potential energy, thermal energy, electrical energy, chemical energy, and nuclear energy. These forms of energy can be converted into one another and used to perform work.
The mass of the pallet can be calculated using the formula: M = E/h, where M is the mass of the pallet, E is the energy required to lift the pallet and h is the height of the building. In this case, the mass of the pallet would be 400 kJ/80 m = 5 kg.
The height which the kier descended can be calculated using the formula: h = E/M, where h is the height descended, E is the energy lost and M is the mass of the kier. In this case, the height would be 140 kJ/70 kg = 2 m.
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Two tugboats pull a disabled supertanker. Each tug exerts a constant force of 2.10×10^6 N
, one at an angle 17.0 ∘
west of north, and the other at an angle 17.0 ∘
east of north, as they pull the tanker a distance 0.630 km
toward the north. What is the total work done by the two tugboats on the supertanker?
Express your answer in joules, to three significant figures.
To pull the tanker 0.630 km total work to be done is 1.871 × 10⁹ Joule.
What is force?The definition of force in physics is: The push or pull on a massed object changes its velocity.
An external force is an agent that has the power to alter the resting or moving condition of a body. It has a direction and a magnitude.
Resultant force acting on the tugboat = √2 × 2.10 × 10⁶ N.
To pull the tanker 0.630 km, that is, 630 m, work done = force × displacement
= √2 × 2.10 × 10⁶ N × 630 m
= 1871004543.01 Joule.
= 1.871 × 10⁹ Joule.
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What is torque per unit moment of inertia?.
Torque τ per unit moment of inertia I is nothing but the angular acceleration α.
An object rotates at an acceleration is inversely proportional to its moment of inertia when a torque is applied to it. Torque is defined mathematically as: τ = I α, where I is the moment of inertia and α is the angular acceleration.
I is usually given by the formula, I = m r².
In rotating motion, torque is the same as force in linear motion. It is the main factor that maintains an object's rotation.
Torque and rotational inertia replace force and mass, respectively, in the angular application of Newton's Second Law. The relationship between angular acceleration and torque is true when an object's rotational inertia is constant.
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A force of 250 N is used to keep a 65 kg crate sliding across the warehouse floor. What is the coefficient of sliding friction for the crate and the floor?
The crate moves with velocity vecv in the positive X-direction, as shown in the FBD above. Forces acting upon that crates are A 65 kilogramme crate is being kept from sliding to across warehouse floor by a force pf 250 N.
Writing equal forces in their component parts using Newton's second law
0 for Sigma F x.
0 Rightarrow F-F friction
----(1) \s\
0 for Sigma F y.
-mg=0 rightarrow
——(2)
Equation (1) yields F friction=F.
Rightarrow ___k=F ___k
Rightarrow mu _k=frac F N
Rightarrow mu k=frac fmg
——-from Equation (2)
Rightarrow _k=frac 250*65*9.8=0.39
fr = Fr/N
The resistive frictional force (Fr) divided more by normal of perpendicular energy (N) pushing adjacent objects together yields the friction coefficient (fr), which is a numerical value. Equation fr = Fr/N serves as a representation of it.
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The crate moves with velocity vecv in the positive X-direction, as shown in the FBD above. Forces acting upon that crates are A 65 kilogramme crate is being kept from sliding to across warehouse floor by a force pf 250 N.
Writing equal forces in their component parts using Newton's second law:0 for Sigma F x.
0 Rightarrow F-F friction
----(1) \s\
0 for Sigma F y.
-mg=0 rightarrow
——(2)
Equation (1) yields F friction=F.
Rightarrow ___k=F ___k
Rightarrow mu _k=frac F N
Rightarrow mu k=frac fmg
——-from Equation (2)
Rightarrow _k=frac 250*65*9.8=0.39
fr = Fr/N
The resistive frictional force (Fr) divided more by normal of perpendicular energy (N) pushing adjacent objects together yields the friction coefficient (fr), which is a numerical value. Equation fr = Fr/N serves as a representation of it.
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The hydraulic fluid transmits the pressure, caused by piston A, equally to each of the four holding up the car supports. The pressure throughout the fluid is the same. A force of 1000 N on piston A is just enough to raise the car. (a) Using values from Fig. 3.1, find (i) the pressure caused by piston A on the fluid, pressure = [2]
To find the pressure caused by piston A on the fluid, we can use the formula:
Pressure = Force / Area
Given that the force exerted by piston A is 1000 N, and the area of each of the four pistons that hold up the car is 0.02 m^2, we can calculate the pressure as:
Pressure = 1000 N / (4 x 0.02 m^2)
Pressure = 25000 N/m^2
So the pressure caused by piston A on the fluid is 25000 N/m^2
HELP PLS RN
A projectile is shot horizontally off a cliff at a speed of 44 m/s. It hits the ground 2 seconds
later.
How high is the cliff, in meters?
The projectile was 1724.8 meters high short horizontally. Any object sent into space with only gravity acting on it is considered a projectile.
What are some examples of a projectile?A projectile is any object that is cast, fired, launched, heaved, hurled, pitched, tossed, or flung. Throwing a ball straight up, kicking a ball and imparting momentum at an angle to the horizontal, or simply letting something fall freely are examples of projectile motion.
Calculation:Cliff at speed of 44m/s
given time is 2 second
H equals u 2 sin 2 2 g.
H = 44 × 2 × 1 × 2 × 9.8
H = 1724.8 meters.
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How do you solve for kinetic energy step by step?.
To solve kinetic energy value you have to:
find the velocity value of the objectfind the mass value of the that object you count in the first stepthen calculate the kinetic energy by multiply that mass and velocity then divide it by halfWhat is kinetic energy?Kinetic energy is the energy the object has when it is moving or has a motion for example: energy in walking, moving car, singing, cycling, etc. The basic formula for kinetic energy is K.E. = 0.5 mv where m is a mass and v is velocity.
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Who is called Mother of physics?.
The name Margaret Curie is still used to refer to the founder of modern physics. She and her husband Pierre discovered radio and polonium in 1898, and in 1903,
She was awarded the first Physics Nobel Prize in recognition of their discoveries. We have to think that everyone of us has a unique gift that has to be developed. "Nothing in life has to be feared; merely understand," the saying goes. Like Nobel, I believe that humankind will gain more from scientific developments than it will lose.
She discovered polonium and radium, promoted the use of radiation in medicine, and radically altered our understanding of radioactivity despite a career of physically taxing and ultimately deadly labor. Born was Curie. Skowron, John
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What can be considered as advantages of edge computing?.
Edge computing improves performance and provides a more pleasant user experience. It improves privacy and data security while also lowering operational costs.
What exactly is edge computing?
Edge computing is a computing model in which key processing tasks are performed within the framework or environment in which data was generated. It is a framework that enables the generation, storage, and processing of data in the location where it is generated, rather than relying on a data center or central data computing environment.
Edge computing also helps AI/ML applications because data is processed close to where it is generated, making AI/ML results easier and faster to obtain.
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Which of the following is not an advantage of
a pneumatic system?
A. Cheap to build.
B. Its medium (air) is readily available.
C. Rigid and responsive.
D. Environmentally friendly.
All of the given except environment friendly are advantages of pneumatic systems. Sometimes these systems causes sound pollution and that's why it cannot be said as environment friendly.
What is pneumatic systems?A pneumatic system is a group of linked parts that uses compressed air to operate automated machinery. Industrial production, a garage at home, or a dentist's office are a few examples.
The motion used to generate this job might be either linear or rotational. To safeguard the working cylinders, actuators, tools, and bladders, compressed air or pressured gas is often filtered and dried.
A lubrication device that provides an oil mist to the closed pressured system is necessary for some applications. The noise produced by pneumatic system greater compared to other systems. Hence , option D is correct.
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PLS HELP RN
A stone is thrown horizontally from the top of a 31.2 m tall cliff. The stone lands at a distance
of 21.4 m from the edge of the cliff. What is the initial horizontal velocity of the stone?
When a stone is hurled horizontally from the top of a 31.2 m tall cliff, its horizontal initial velocity is 39.25 m/s.
What is the initial horizontal velocity formula?By measuring the ball's diameter d and dividing it by the time t it takes for it to cross the photogate, one can also calculate the ball's starting horizontal velocity. Therefore, Vo = d/t. The kinematics equations of motion can be used to calculate the horizontal velocity of a projectile motion made by a person or an item.
Calculation:Height of cliff is 31.2 m
distance is 21.4
t = √2h/g
t = √2×31.4/9.8
t = √62.8/9.8
t = 0.80
The stone's first motion:V = 31.4/0.08
V = 39.25 m/s.
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A hot-air balloon takes off from the ground traveling vertically with a constant upward acceleration of magnitude g/4. After a time interval Δt, a crew member releases a ballast sandbag from the basket attached to the balloon. How many seconds does it take the sandbag to reach the ground?
The distance traveled (height) following a drop until it touches the ground is calculated using the equation s = u*t + 1/2*a*t2. The height from which the sandbag was dropped is given by plugging in the u, t, and a values mentioned above as well as s = 110 m.
What are Newton's first, second, and third laws of motion?
According to the first law, a force must be applied to an object before it may affect its motion. According to the second law, an object experiences a force equal to its mass times its acceleration. According to the third law, when two things interact, they exert forces on one another that are both equal in strength and directed in the opposite direction.
What is the definition of equation of motion class 9?
A set of equations can be used to construct a relationship between the body's velocity, acceleration, and the distance it travels in a given amount of time when the body is moving in a straight line with uniform acceleration.
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Who's going thru depression? My science teacher said that it's not good to hold that in but sometimes I don't feel like he get's me. What do I do?
PLEASE HELP I WILL GIVE 20 POINTS!!!! A 0.5 kg football is moving at a velocity of
20 ms where it hits a receiver's hands who stops the ball in 0.075 seconds. What force did the receiver put on the ball?
A 15 m/s throw of a 0.50 kilogramme football is made to the right. In 0.020 seconds, a motionless player receives the ball and pulls it to a stop.
What role does velocity have in football?It is beneficial to be capable to kick the ball far or quickly in all football codes. The speed of the foot at the moment it makes contact with the ball is a crucial factor in determining ball speed or kick distance.
In football, what forces are employed?The four forces are gravity, shear forces, contact pressure, and applied force. Football players continually use the force of gravity when they kick, throw, or leap into the air to dodge a tackle or receive the ball.
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A 15 m/s throw of a 0.50 kilogramme football is made to the right. In 0.020 seconds, a motionless player receives the ball and pulls it to a stop.
What role does velocity have in football?It is beneficial to be capable to kick the ball far or quickly in all football codes. The speed of the foot at the moment it makes contact with the ball is a crucial factor in determining ball speed or kick distance.
In football, what forces are employed?The four forces are gravity, shear forces, contact pressure, and applied force. Football players continually use the force of gravity when they kick, throw, or leap into the air to dodge a tackle or receive the ball.
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Many modern rifles uses bullets that have less mass and reach higher speeds than bullets of older rifles. This makes the rifle more accurate over longer distances. The momentum of an older bullet, fired from an old rifle, is 8,25 kg.m.a north.
What is the momentum of a new bullet which has 3/4 the mass of the old bullets and is 3/2 of the speed of the old rifle
0.5kg is the momentum of a new bullet. Guns are able to cause such significant damage because of the momentum they provide their bullets.
What is the bullet momentum?Guns are able to cause such significant damage because of the momentum they provide their bullets. An object's momentum is calculated by dividing its mass by its speed. An object's mass or speed can be increased to enhance its momentum and, thus, its capacity for destruction.Long range performance will be greatly reduced since a bullet with a bigger diameter will have significantly more drag than a bullet with a smaller diameter and the same mass.An object's momentum is calculated by dividing its mass by its speed. An object's mass or speed can be increased to enhance its momentum and, thus, its capacity for destruction.Explanation:
Object momentum: 3/4 divided by 3/2 = 0.75 / 1.5
= 0.5kg.
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help!! Which of the following statements accurately describes both the scientific method and the technological design process.
a.Both use the scientific method to achieve the best result.
b.Both are directly meant to make human lives easier.
c.Both are concerned with improving humanity's amount of knowledge.
d.Both are a process that is repeated many times over.
Answer:
b.Both are directly meant to make human lives easier.
c.Both are concerned with improving humanity's amount of knowledge.
what is the molality of a solution that contains 0.625 g of argon dissolved in 150 g of water? report your answer in mol/kg and round to the third decimal place.
A solution of 0.625 g of argon dissolved in 150 g of water has a molality of 0.104 mol/kg.
The molality of a solution is defined as the number of moles of solute (in this case argon) per kilogram of solvent (in this case water).
To find the number of moles of argon in the solution, we need to first find the molar mass of argon, which is 39.948 g/mol.
0.625 g of argon / 39.948 g/mol = 0.0156 moles of argon
To find the number of kilograms of water in the solution.
150 g of water / 1000 g/kg = 0.15 kg of water
Now we can use the definition of molality to find the molality of the solution:
0.0156 moles of argon / 0.15 kg of water = 0.104 mol/kg
Rounded to the third decimal place, the molality of the solution is 0.104 mol/kg.
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a change in the magnetic field surrounding the conductor induces a voltage in the conductor. this induced voltage is known as ___.
A change in the magnetic field surrounding the conductor induces a voltage in the conductor, this induced voltage is known as electromagnetic induction
What causes a voltage to be induced by a changing magnetic field?A current will be produced in a coil of wire if it is subjected to a shifting magnetic field. Because of an electric field that has been generated, which induces the charges to move around the wire, current is moving. (The magnetic force can't be the cause because the charges aren't moving at first.)
Which physical principle dictates that a shifting magnetic field might cause a voltage to emerge in a circuit?According to Faraday's law, the induced voltage in a circuit is proportional to the rate with which the magnetic flux through that circuit varies over time. In other words, the voltage in the circuit will be greater the faster the magnetic field changes.
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We now define a quantity_______, called the total mechanical energy of our system
We now define a quantity the sum of the potential energy and the kinetic energy is called the total mechanical energy of our system.
What is Total Mechanical energy?
The energy a body has as a result of movement or position is known as mechanical energy. The energy that is released by falling from a particular position is a good example. As the literal driving force of the world around us, whether it be natural or man-made, mechanical energy is one of the fundamentals studied in mechanical engineering. In joules, mechanical energy is measured.
The sum of a body's potential energy and kinetic energy is referred to as total mechanical energy. The total of the two forms of mechanical energy in a single occurrence is constant. The ball's kinetic and potential energies change quickly as it rises and falls, but their combined total remains constant.E = K + U.
The ball starts to lose kinetic energy as it rises. The conversion of energy to potential energy, or heat, which is essentially a chaotic mixture of kinetic and potential energy, is the only way energy can actually be lost. The ball develops momentum as it falls back down, increasing its kinetic energy.This kinetic energy does not just appear. Instead, the ball's potential energy—which it accumulated while rising—is now being converted into kinetic energy.To know more about Total Mechanical energy ,refer to:
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What is the main advantage of 5G when compared to 4G?.
Overall, 5G has various advantages over 4G, including faster speeds, lower latency, capacity for more connected devices, less interference, and improved efficiency, thanks to the new technology, spectrum.
The eagerly awaited fifth-generation mobile telecommunications technology, also known as 5G, has been hailed as a paradigm shift in mobile networking, promising tenfold higher download rates, real-time data sharing, and increased network capacity.
5G has finally here, despite setbacks and delays that have plagued the rollout in both the US and several regions of Europe. With between 80 and 90% of the world's population, South Korea, the US, and China are pacing the field. Although Europe lags behind, Switzerland is an anomaly and has attained 90%.
Mobile network operators and technology vendors are as bullish as ever about the future of 5G, despite continued difficulties with the worldwide rollout. According to the 2021 Ericsson Mobility Report, by 2027, over half of all mobile subscriptions will be for 5G.
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In an experiment searching for the photoelectric effect, an incident beam of green light produced no ejected electrons from a metal. In order to eject electrons, the experimenter should?A. increase the brightness of the light.B. try blue light.C. try yellow light.D. give up on that particular metal.E. decrease the brightness of the light.
To emit electrons, the experimenter must try blue light.
Light emits electrons when electromagnetic radiation hits a material, such as the photoelectric effect. Photoelectron is a term used to describe electrons emitted in this manner. When light hits a metal, electrons are emitted from the metal's surface, known as the photoelectric effect. This process is also called photoemission, and the electrons emitted from the metal are called photoelectrons. To eject electrons, we need to try blue light, which has a shorter wavelength than the green light needed for light emission. To emit electrons, the experimenter must try blue light.
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How are the pressure difference created in nature?
Pressure differences in nature can be created by a variety of mechanisms. the mechanisms are Temperature differences,.Altitude differences, Density differences.
Temperature differences: Warm air is less dense than cool air, which creates a pressure difference between the two. This can lead to the formation of atmospheric circulations such as winds and storms.
Altitude differences: At higher elevations, the air is less dense than at lower elevations, which creates a pressure difference. This is why the air pressure decreases as you go up in altitude.
Density differences: When a fluid is flowing, areas of higher density will have a higher pressure than areas of lower density. This can lead to the formation of currents and eddies in water and air.
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Answer:
The pressure difference is created in nature by the heat of the sun.
Explanation:
When it falls on the earth's surface, the surface of the earth gets heated and the air above it also gets warm and becomes lightweight, and moves upward. Thus, the pressure difference is created.
What is Newton's 3rd law commonly called?.
Newton's third law is also known as the law of complementary effects and the law of action-response.
Newton's third law, the law of interaction and the law of action and reaction, states that all actions have equal and opposite reactions.
This shows that when one object exerts a force on another, the mirror image exerts an equal and opposite reaction on the first object. “For every action, there is an equal and opposite reaction” is a popular saying.
This principle can be observed in a variety of real-world situations, such as when someone pushes a wall and the wall is pushed back with the same and opposite force.
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Why is latency so important?.
The performance of your network and your company might be significantly impacted by latency. This will grow more important as businesses depend more on cloud-based software and Internet of Things (IoT) services.
The latency of a data packet measures how long it actually takes to go from one location to another. The unit of measurement for the delay in milliseconds. Even a little amount of delay, such as 50 milliseconds, or less than one-tenth of a second, can have a severe effect on network and application performance.
Quick enjoyment is obtained from low latency through improving revenue, team involvement in video conferences, survey completion rates, and productivity.
Latency is influenced by a variety of factors. It can be impacted by the equipment's hardware, network and internet connections, physical distance, and geographic location.
Latency has an effect on everyday business activities, which makes any attempt at future-proofing difficult.
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A pacehip traveling in pace at a contant velocity of 800m-1 launche a probe tomand a ditant
planet. If the probe i launched with a velocity relative to the pacehip. Of
600 m-1 in a direction at right angle to
the
Flight path of the pacehip,Calculate the reultant velocity of the probe
The overall equation in this case is v (final) - at + v (initial), where v denotes velocity, a denotes acceleration, and t is time.
How do you calculate resultant velocity?The total of an object's individual vector velocities is known as the resultant velocity. The scalar product of an object's mass and acceleration vector equals the total of its vector forces, which are measured in terms of a force vector.R = A + B. Equation 2 To create the resultant vector, opposing vectors are subtracted from one another. R is the resultant vector in this case, and the vector B is directed in the opposite direction to the vector A.By dividing the entire distance travelled by the time it took the object to go a certain distance, you may calculate the object's initial velocity. V, d, and t are the three variables that make up the equation V = d/t.To learn more about velocity refer to:
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Energy Representations 3: Power and Efficiency:Question 2
This Sankey diagram shows the energy transformations
in a mixer used to stir ingredients together. If the
percentage of non-useful energy produced by the mixer
is 30%, what is the energy efficiency of the mixer?
Select one:
10%.
70%.
100%.
30%.
Electric energy
Sound
Thermal energy
energy
Kinetic energ
The energy efficiency of the mixer is 70%.
The Sankey diagram shows the amount of energy absorbed, the amount of useful energy, and the amount of non-useful energy.
Input energy = output energyInput energy = useful energy + non-useful energyInput energy (I) = useful energy (U) + waste energy (W)The efficiency of a device
η = (U/I) × 100%
Input energy is always 100%I = U + W
100% = U + 30%
U = 100% - 30%
U = 70%
The efficiency of the mixer
η = (U/I) × 100%
η = (70%/100%) × 100%
η = (7/10) × 100%
η = 70%
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Which of the earth’s spheres are involved in the melting of a glaciers?
The earth’s spheres which are involved in the melting of a glaciers include the following below:
cryospheregeosphereasthenospherehydrosphereWhat is a Glacier?This is referred to as a persistent body of dense ice that is constantly moving under its own weight.
The cryosphere is described as the portions on Earth where water appears in solid form such as glaciers while the hydrosphere is all the forms water on a planet including liquid water, ice etc and the geosphere which contains athenosphere provides the heat which is involved in the melting.
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The full question:
Which of the earth’s spheres are involved in the melting of a glaciers?
geosphere, troposphere, cryosphere atmosphere, geosphere, cryosphere atmosphere, asthenosphere, biosphere hydrosphere, asthenosphere, atmosphere
What is the law of conservation of linear momentum and its formula?.
The linear momentum formula is p = mv. The overall quantity of momentum never changes, and this phenomenon is known as momentum conservation.
What is the law of linear momentum conservation?If the net external force acting on a system of bodies is zero, the momentum of the system remains constant, according to the conservation of linear momentum. We must remember that the momentum of the system, not the individual particles, is preserved.
For example, consider two bodies of mass M and m, one at rest and the other travelling with certain velocity towards it. If they collide and move together afterward.
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The thrown ball is a projectile, so its height, h, in feet, after t seconds can be modeled using the projectile motion formula. Complete the equation that models the ball's height. H = t2 + t +.
The equation that models the ball's height is: h = -16t2 + vt + h0, where h0 is the initial height of the ball and v is the initial velocity of the ball.
What is velocity?Velocity is a measure of the rate of change of an object's position in a certain direction. It is a vector quantity, meaning that it has both magnitude and direction. Velocity is typically measured in meters per second (m/s) or kilometers per hour (km/h).
The equation that models the ball's height is: h = -16t2 + vt + h0, where h0 is the initial height of the ball and v is the initial velocity of the ball. This equation models the ball's height based on the principles of projectile motion, which states that the vertical motion of an object can be modeled using the equation h = -16t2 + vt + h0, where h0 is the initial height of the ball and v is the initial velocity of the ball. The negative sign indicates that the object is being affected by gravity, and the -16 represents the gravitational acceleration of 9.8 m/s2 divided by 2.
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Answer:
16 24 6
Explanation:
a form of energy conversion that captures heat energy from within earth
Geothermal energy is a method of energy conversion that utilizes heat energy from inside the Earth to generate electricity and other purposes such as space heating, cooking, and bathing.
Examples of surface phenomena that are created by heat from the Earth's core include lava flows, geysers, fumaroles, hot springs, and mud pots. The heat is mostly produced by friction at the borders of continental plates as well as the radioactive decay of potassium, thorium, and uranium in the Earth's crust and mantle. The resultant low-grade heat flow has a global yearly average of 50 to 70 milliwatts (mW) per square meter. In contrast, the surface of the Earth receives 342 watts per square meter of solar radiation per year (see solar energy). Geothermal heat energy may be gathered and used for human purposes everywhere on the surface of the Earth. There will be 4.5 106 petajoules On the surface, energy can be gathered and utilized.
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