The box's acceleration is 2.75m/s².
What is equilibrium force and an illustration?It is said that an equilibrium is stable when small, externally induced displacements from it result in forces that have a tendency to oppose the displacement and bring the body or particle back to the equilibrium state. A brick placed flat on the ground or a weight suspended by a spring are two examples.
Given,
F = 185 N is the amount of force that the student applied
Horizontal is at an angle of θ = 25°
Mass of box = 35kg
Between the box and the floor, there is a kinetic friction coefficient of
µ = 0.27
The equilibrium of forces is the foundation for the presented issue. We also need to find the equation of motion for the force's horizontal and vertical components in order to solve the problem. So,
Across the horizontal axis,
Tcosθ - µN = ma (1)
The forces acting in the vertical direction are,
N + Tsinθ = mg
N = mg - Tsinθ (2)
Replace (1) with the value of equation (2) as,
Tcosθ - µ( mg - Tsinθ) = ma
a = Tcosθ - µ( mg - Tsinθ)/m
The applied force, T = F = 185 N, causes the tension force on the rope.
fixing as,
a = 185×cos25× -(0.25)×35×9.8+((185)sin25)/35
a = 2.75m/s².
Consequently, we can say that the box's acceleration is a = 2.75m/s².
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Suppose photons are produced in a cathode ray tube (CRT) from electrons which are accelerated across a potential of 23.5 KV. (a) What is the maximum energy, in electron volts, of the photons?(b) What is the maximum frequency, in hertz, of these photons?
3.710^-15 joule is the maximum energy of the photons
voltage= 23.5 = 23500 V
q= 1.6 × 10^-19 coulombs
Energy= qV
E= 3.710^-15 joule
Energy is the ability to perform work in physics. Different shapes, such as potential, kinetic, thermal, electrical, chemical, radioactive, etc., may be assumed by it. Other instances of energy being transmitted from one body to another include heat and work. Energy is always distributed after it has been transferred in accordance with its type. Thus, heat transfer could result in thermal energy, whereas work could result in mechanical energy.
Motion is a trait shared by all forms of energy. For instance, if a body is moving, it possesses kinetic energy. Due to the object's design, which integrates potential energy, a tensioned object, such a spring or bow, has the ability to move even when at rest.
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A 4. 00 kg ball is on a 5. 00 m ledge. If it is pushed off the ledge, how much kinetic energy will it have just before hitting the ground?.
The kinetic energy the ball will have just before hitting the ground is 0.196 kJ.
Define kinetic energy in your words?
The energy that an object has because it is moving is known as kinetic energy in physics.
In other words it can be defined as the amount of effort that is required to accelerate a body of a specific mass from rest to its specified velocity is termed as kinetic energy.
The following informations are given in the question,
Mass of the ball, M = 4 kg
Height of the ledge, S = 5 m
Initial velocity of the ball, u = 0 m/s (at rest)
From the third equation of motion, we have
v^2 = u^2 + 2a × S
= 0 + 2 × 9.8 × 5
= 98
v = √(98)
= 9.889 m/s
= 9.9 m/s
Kinetic energy is found out using the formula, E = 1/2 × mass × v^2
Since the initial kinetic energy of the ball is 0 as its initial velocity is 0 or the body was at rest, therefore,
The final kinetic energy of the ball,
Ef = 1/2 × 4 × 9.9^2
= 196 J
= 0.196 kJ
Hence, the kinetic energy the ball will have just before hitting the ground is 0.196 kJ.
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When placing cold water into a hot pot to boil what happens to the energy to the cold water as it starts to boil?
Since heat flows from the hot pot to the cold water, the total energy of the cold water will decrease.
Since heat flows from the hot pot to the cold water, the total energy of the cold water will increase.
Since heat flows from the cold water to the hot pot, the total energy of the cold water will increase.
Since heat flows from the cold water to the hot pot, the total energy of the cold water will decrease.
Answer:Since heat flows from the cold water to the hot pot, the total energy of the cold water will decrease
Explanation:
Answer:Since heat flows from the hot pot to the cold water, the total energy of the cold water will increase.
Explanation:
you place a 7/50 kg television set on a spring scale. if the scale reads 78.4 n, what is the acceleration due to gravity at that location?
The acceleration due to gravity is 9.8 m/s^2.
What is gravity?
In mechanics, gravity—also known as gravitation—is the constant force of attraction that pulls all matter together. It has no impact on determining the internal characteristics of common matter because it is by far the weakest known force in nature. In contrast, it governs the structures as well as evolution of stars, galaxies, as well as the entire cosmos through its extensive and universal action, which affects the trajectories of objects in the solar system and throughout the universe. All objects on Earth have a weight, or a gravitational pull downward, proportional to their mass, which is a result of the mass of the planet. The acceleration that gravity gives to objects falling freely serves as a gauge of its strength. The acceleration of gravity at Earth's surface is approximately 9.8 metres (32 feet) per second for every second.
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(iii) A car of mass 2000kg moves with an initial velocity of 40km/h and attain a final velocity of 120km/h which was maintained for a given distance. Calculate the impulse of the car.
160000 kgm/s is the impulse of the car.
J=mΔv
I= impulse
m= mass= 2000kg
Δv= change in velocity= 80 km
J=mΔv
I= 2000kg×80 km/s
I=160000 kgm/s
The concept of impulse is used to describe how a net force affects an item (a kind of "moving force"). Impulse is denoted by the letter J. The average net force acting on an item over time is calculated as an impulse. The force-time integral is J = Ft. The vector quantity of impulse is J = F dt (since force is a vector and time is a scalar).
Theorem of Impulse-Momentum According to the impulse-momentum theorem, an object's change in momentum equals the impulse that was delivered to it. J = ∆p The newton second is the SI unit for impulse. The kilogram meter per second is the SI unit for momentum. These momentum and impulse units are the same.
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a steel cable supports an actor as he swings onto the stage. the weight of the actor stretches the steel cable. to describe the relationship between stress and strain for the steel cable, you would use
A steel cable supports an actor as he swings onto the stage, the weight of the actor stretches the steel cable, to describe the relationship between stress and strain for the steel cable, you would use Young's modulus. Correct answer: letter B.
Young's modulus is used in this statement because it is a measure of the stiffness of a material. The steel cable is stretched by the actor's weight, and the amount of stretch is related to the tension in the cable and the Young's modulus of the steel.
Which is Young's modulus?Is a measure of the stiffness of a material. It is defined as the ratio of the stress to the strain, and it is a measure of the ability of a material to resist deformation under load.
Therefore, when an actor's weight stretches a steel cable, the cable experiences tension. The amount of stress experienced by the steel cable is directly proportional to the amount of strain experienced by the steel cable. This relationship is described by Young's modulus.
A steel cable supports an actor as he swings onto the stage. The weight of the actor stretches the steel cable. To describe the relationship between stress and strain for the steel cable, you would use?
Group of answer choices:
a) both shear modulus and bulk modulus.
b) Young's modulus
c) bulk modulus.
d) shear modulus
e) both Young's modulus and bulk modulus.
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a 2.0-kg ball tied to a string is rotating in a horizontal circle of radius 0.5 m. the maximum tension force the string can withstand is 100 n. what is the maximum rotational speed of the ball before the string breaks? group of answer choices 15 m/s 5 m/s 20 m/s 25 m/s 10 m/s
Therefore, the ball's speed is 2.24 m/s 2.24 m/s. The weight of the ball caused by the earth's gravity is the force exerted on it at any point along the journey.
Take a look at the ball's free-body diagram from both its top and bottom positions in the circle. When a body is suspended from items like chains, cables, strings, etc., tension is simply the drawing force at work on the body. The direction of a body or object's movement is defined by its velocity. In its basic form, speed is a scalar quantity. In essence, velocity is a vector quantity. It is the speed at which distance changes. It is the displacement change rate.
Centrifugal force in the string is given by
F= rmv2
v2= mFr
v2= 0.25/25×1.96
=196
v= 196
=14m/s
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What is the acceleration of a vehicle that
changes its velocity from 300 km/h to a dead
stop in 20 s ?
Answer:
Explanation:
Given:
ΔV = 300 km/h = 300 000 m / 3 600 s ≈ 83.3 m/s
Δt = 20 s
_____________
a - ?
The acceleration:
a = ΔV / Δt = 83.3 / 20 ≈ 4.2 m/s
You place a sheet of paper on a 3 beam balance, it has a mass of
3.15g, you then take the paper off the scale and rip it precisely in half.
Into two smaller sheets. You then put both pieces back on the scale,
what should the new mass be? ANswer:
The mass will remain same of 3.15g.
Mass is used in physics to express inertia, a fundamental function of all be counted.
Essentially, it's far a mass of depend's resistance to converting its direction or velocity in reaction to the application of a pressure. The exchange that an implemented pressure produces is smaller the extra mass a body has.
The kilogram, the unit of mass within the international gadget of units, corresponds to 6.62607015 1034 joule seconds the usage of Planck's constant (SI). One joule is produced with the aid of multiplying one kilogram via one square meter in keeping with second.
The kilogram is decided by using exact measurements of Planck's regular given that the second and the meter have formerly been defined in phrases of different physical constants.
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If two objects, one with a mass of 1000 kg and another with a mass of
2500 kg are separated by a distance of 100 m, what is the force between
them?
If two objects, one with a mass of 1000 kg and another with a mass of
2500 kg are separated by a distance of 100 m, and the force between
them is 1.667 * 10⁻⁸ N.
What is the force between two masses separated by a distance d?The force, F, between two masses separated by a distance, d, is given by the formula below:
F = Gm₁m₂ / d²
where;
G is gravitational constant = 6.67 * 10⁻¹¹ Nm²/kg²
m₁ is the mass of the first object = 1000 kg
m₂ is the mass of the second object = 2500 kg
d is distance = 100 m
The force will then be;
F = 6.67 * 10⁻¹¹ * 1000 * 2500 / 100²
F = 1.667 * 10⁻⁸ N
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Explain what could be a mechanism by which jendrassik maneuver produces bigger myotatic reflex.
The Jendrassik maneuver (JM) is a method for enhancing sluggish tendon-tap during the examination. The tendon tap reflex is used to assess the state of the monosynaptic reflex through the spinal cord.
This is due to enhanced gamma efferent discharge to the muscle spindle. Protective measures for the muscles, in order to prevent tearing that can occur due to vigorous movement. Once the muscle spindle is stretched, the impulse is sent back to the muscle very quickly and protects it from being pulled forcefully or beyond its normal range of motion.
The Jendrassik maneuver is a clinical maneuver in which the patient clenches the enamel, flexes each set of arms right into a hook-like form, and interlocks the one's sets of arms together. The tendon beneath the patient's knee is then hit with a reflex hammer to elicit the patellar reflex.
The Jendrassik maneuver may also exaggerate spinal reflexes including the patellar reflex. explain. the Jendrassik maneuver reduces activity in normal brain stem descending inhibitory pathways that manipulate spinal reflex neurons. a discount in inhibition on the spinal level may additionally lead to myotatic reflex responses.
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what is the result? what is the result? the wire's resistance decreases, but its resistivity stays the same. the wire's resistivity decreases, but its resistance stays the same. the wire's resistance increases, but its resistivity stays the same. the wire's resistivity increases, but its resistance stays the same.
Resistivity is the measure of an electrical conductor's resistance with a unit cross-sectional area and unit length. Any material's resistance can be used to distinguish it from other materials and to assess how well they carry electric currents. High resistance suggests little conductivity.
"The wire's resistivity changes, but its resistance does not,"
Stretching a copper wire causes its length to rise and its diameter to contract, which raises the wire's resistance but keeps the material's and temperature's resistivity constant.
The resistance of current in a wire is inversely related to the cross-sectional area of the wire and directly proportional to its length. This is,
R = (L rho)/A
Where
L stands for wire length.
A is the wire's cross-sectional area.
Resistivity, or rho, is a proportionality constant that is influenced by the wire's quality.
In light of this, resistance and resistivity are connected by:
proportionality constant based on the composition of the substance.
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A car accelerating from 10m/s to 25m/s
in 6sec find average acceleration
Answer:
2.5 m/s
Explanation:
Please mark me as brainly
formula : a = v-u
t
that is : acceleration = final velocity - initial velocity
time
so answer goes like this :
a = 25 - 10
6
a = 15
6
a = 2.5 m/s
How many spring and neap tides will a tide-recording station experience in a given month?
a. 3 to 4 spring tides and 1 to 3 neap tides
b. 1 spring tide and 1 neap tide
c. 1 to 3 spring tides and 3 to 4 neap tides
d. 2 spring tides and 2 neap tides
Option d is correct.
2 spring tides and 2 neap tides will be experienced by the tide-recording station in a given month.
Tides are the rise and fall in sea levels brought on by the combined effects of the Moon's (and the Sun's, to a much lesser extent) gravitational pulls, as well as by the Earth and Moon circling one another. The monthly tides on Earth are influenced by the gravitational pull of the moon and the sun together.
The solar tide adds to the lunar tide when the sun, moon, and Earth are aligned (during a new or full moon), resulting in extremely high tides and extremely low tides, both of which are known as spring tides.
The solar tide largely cancels out the lunar tide one week later when the sun and moon are at right angles to one another, resulting in the mild tides known as neap tides. Two sets of spring tides and two sets of neap tides take place twice each lunar month.
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What is brewster’s angle for light traveling in water that is reflected from crown glass?.
The correct answer of Brewster’s angle is 48.8 degrees for light traveling in water that is reflected from crown glass.
What is light's Brewster angle as it travels through water?
Brewster's law is the name of this equation, and the angle it defines is known as Brewster's angle. Brewster's angle for visible light is around 56° for a glass medium in air (n2 = 1.5), while it is roughly 53° for an air-water interface (n2 = 1.33)
The inverse tan of n 2 over n 1 is what is known as Brewster's Angle. Therefore, 48.8 degrees is the inverse tan of 1.52 divided by 1.33.
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A force F~ = Fx ˆı + Fy ˆ acts on a particle that
undergoes a displacement of ~s = sx ˆı + sy ˆ
where Fx = 10 N, Fy = −5 N, sx = 4 m, and
sy = 1 m.
Find the work done by the force on the
particle.
Answer in units of J.
008 (part 2 of 2) 10.0 points
Find the angle between F~ and ~s.
Answer in units of degrees
Make sure answers have all decimal places and are un rounded
The work done by the force on the 35 Joule.
What is work?Work in physics is the energy that is transferred to or from an item when a force is applied along a displacement. In its simplest form, it equals the product of the force's magnitude and the distance traveled for a constant force directed in the direction of motion.
Work = force . distance. In units, Joules = Newtons x meters.
Work = 10.4 + (-5)1
Work = 35 Joule
The work done by the force on the 35 Joule.
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Many scientists suspect that Venus has a stronger and thicker lithosphere than Earth. If this is true, which of the following could explain it?
A. The high surface temperature that has "baked out" all the liquid water from Venus's crust and mantle.
B. The slow rotation of Venus.
C. The smaller size of Venus, which has allowed it to lose much more internal heat than Earth.
D. The apparent lack of plate tectonics on Venus.
Many scientists suspect that Venus has a stronger and thicker lithosphere than Earth. Option A. The high surface temperature "baked out" all the liquid water from Venus's crust and mantle which could explain this.
The crust of Venus appears to be almost entirely volcanic and basaltic. there is not anything there like Earth's continents—no granitic rocks in any respect, high in silicon and oxygen.
Venus's crust appears to be 70 kilometers (43 mi) thick and composed of silicate rocks. Venus's mantle is approximately 2,840 kilometers (1,760 mi) thick, its chemical composition might be similar to that of chondrites. Venus' floor isn't an unmarried, solid “lithosphere”, as as soon thought, however, it is a patchwork of tectonic plates with a similar pastime to – but not the same as – the ones here on this planet
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each of the four drawings shows the same three concentric loops of wire. the currents in the loops have the same magnitude i and have the directions shown. rank the magnitude of the net magnetic field produced at the center of each of the four drawings, largest to smallest.
The magnetic area is parallel to the direction of the contemporary within the twine. electric costs produce electric-powered fields and magnets produce magnetic fields.
A magnetic discipline is a vector discipline that describes the magnetic impact on moving electric expenses, electric-powered currents, and magnetic materials. A moving fee in a magnetic subject reviews a force perpendicular to its own velocity and to the magnetic field.
The magnetic area is the area round a magnet that has magnetic pressure. All magnets have north and south poles. contrary poles are attracted to every different, even as the identical poles repel each different. when you rub a bit of iron along a magnet, the north-looking for poles of the atoms inside the iron line up in the equal path.
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Disclaimer:- your question is incomplete, please see below for the complete question.
Each of the four drawings shows the same three concentric loops of wire. the currents in the loops have the same magnitude i and have the directions shown. rank the magnitude of the net magnetic field produced at the center of each of the four drawings, largest to smallest.
initially, an inductor with no resistance carries a constant current. then the current is brought to a new constant value twice as large. after this change, when the current is constant at its higher value, what has happened to the emf in the inductor?
The correct answer is it will continue to be zero in case of emf when the current is constant at its higher value.
What is the relation emf and current?
The term "induced electromotive force" (EMF) refers to the potential difference that is produced when a coil's magnetic flux changes. The pace at which electrons or ions flow in a closed circuit is known as current, in contrast.
The emf across an inductor is zero whenever the current is constant(unchanging), large or small.
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In lab we applied the conservation of energy to a system to allow us to equate the initial energy to the final energy. How does the initial energy become stored in the system?.
Due to its position, an object has the ability to store energy. The initial energy that is stored in the system is provided by the tension in the string.
In physics, what is energy?The ability to exert an force that causes an item to move is what is meant by the definition of energy as the "power to accomplish work." Even though the definition is unclear, the meaning is clear: energy is simply the force that moves things. Potential energy and kinetic energy are the two categories of energy.
Why is energy so crucial?Because it is a fundamental human requirement, energy plays a significant role in our daily lives. Our human-made structures are not only heated by energy, but also cooled by it. Even lifting a finger requires energy, as does getting out of bed and going outside.
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a boy stands at one end of a floating raft that is stationary relative to the shore. he then walks in a straight line to the opposite end of the raft, away from the shore. what is the total momentum before the person moves?
The total momentum before the person moves is zero when he walks in a straight line to the opposite end of the raft.
What is meant by momentum?According to Newton's second rule of motion, the rate of change of body's momentum is equal to the net force acting on it. Momentum changes with frame of reference, but it is a conserved quantity in any inertial frame, which indicates that if a closed system is not impacted by external forces, its total linear momentum remains constant.
Because the initial momentum was zero, the final momentum must also be zero. If the boy has momentum in one direction, the boat must have momentum in the other. The total momentum before the person moves is zero when he walks in a straight line to the opposite end of the raft
As a result, the boat moves backward.
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A ray of light passes from air into water at an angle of incidence of 50°. What is the angle of refraction?
Answer: index of refraction (air) = 1.0; index of refraction (water) = 1.33.
Explanation:
This geometrical form can be distorted as a lower pyritohedral
symmetry
Yes, This icosahedrons geometrical form can be distorted as a lower pyritohedral symmetry.
What is a icosahedrons?
An icosahedron is a polyhedron with 20 faces. it has no.of edges=30and no. of Vertices=12.it is a geometrical shape.
What is pyritohedral symmetry?A 3D spherical symmetry group with the symbol B3/2 is called pyritohedral symmetry, also referred to as pyritic symmetry. The pyritohedral icosahedron and its dual pyritohedron make up this symmetry group.
Snub octahedrons, snub tetratetrahedrons, snub tetrahedrons, and pseudo-icosahedrons are all names for conventional icosahedrons that have been deformed or marked up as having a lower pyritohedral symmetry. An alternating truncated octahedron can be seen in this.
Hence , This icosahedrons geometrical form can be distorted as a lower pyritohedral symmetry
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A central purple circle labeled o has 2 concentric rings. The inner ring has 2 small green spheres. The outer ring has 6 small green spheres. How many additional electrons does this atom of oxygen need in its valence shell to satisfy the octet rule? two four six eight.
This atom of oxygen need two electrons in its valence shell to satisfy the octet rule.
What is octet rule?The octet rule is a rule of thumb in chemistry that reflects the theory that main group elements have eight electrons in their valence shells and tend to bond in the same electronic configuration as the noble gases. increase. The octet rule states that an atom should only have 8 electrons in its full outer shell.
The electronic configuration of oxygen is 1s²2s²2p⁴. Two electrons are required for oxygen to reach the noble gas configuration. According to the octet rule, an oxygen atom must be bonded twice. An O2 molecule has two atoms. That is, two atoms of the same element are bonded in pairs.
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Answer:
its 6 the other person was wrong
Explanation:
the output voltage of a 78 ww transformer is 14 vv , and the input current is 34 aa . part a is this a step-up or a step-down transformer? is this a step-up or a step-down transformer? the transformer is step-up. the transformer is step-down.
The transformer is step-up because output voltage has higher value.
We need to know about the transformer to solve this problem. Transformer is a device that can increase or reduce the voltage. The changed voltage depends on the current and number of coil turns. It can be written as
Vi / Vs = Ni / Ns = Is / Ii
where Vi is input voltage, Vs is output voltage, Ni is primary turn, Ns is secondary turn, Is i output current and Ii is input current.
From the question above, we know that
P = 78 W
Vs = 14 V
Ii = 34 A
Find the input voltage by using the power of transformer
P = Ii . Vi
78 = 34 . Vi
Vi = 2.29 V
As we know the input voltage is lower than the output voltage. It means that the transformer is included to step up transformer.
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(a) a moving electron has a kinetic energy of 5.53 ev. what is the wavelength of this electron (in m)? m (b) a photon with an energy of 5.53 ev has what corresponding wavelength (in m)? m
By converting the 400 nm wavelength of violet light into meters we are get 4.0.10^-7.
What is wavelength ?
wavelength can be defined as the distance between two successive crests or throughs of a wave. It is measured in the direction of the wave.
The wavelength of light defined as the distance between the two successive crests or throughs of the light wave.
The wavelength of light is the distance between corresponding point in two adjacent light cycles and the frequency.
Convert the unit for 400nm-
4.0.10^-7
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What is the vertical acceleration of a dart that is launched horizontally with an initial velocity of 2. 3 m/s?.
A horizontal dart launch with just an initial velocity of 2. 3 m/s accelerates upwards at a rate of -9.8 m/s2.
Explain what an acceleration is.acceleration is the rate of change in both speed and distance of velocity over time. When anything moves faster or slower in a straight line, it is said to have been accelerated.
What is an effective instance of acceleration?An object has positive acceleration when it is going faster than it was previously. Positive acceleration was demonstrated by the moving car in the first scenario. The acceleration is in a direction that is consistent with the way that the vehicle is moving forward and speeding up.
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how to get to meausre density, volume or mass
How much force is needed to overcome inertia?
Answer:
Any amount of force
Explanation:
Any amount of force will overcome inertia, assuming that overcoming inertia means changing the velocity of an object. Looking at Newton's 2nd law: F=m*a, any force applied to a constant mass must effect an acceleration.
If overcoming inertia entails altering an object's velocity, then any amount of force will do it. By applying a force on a mass that is constant, as stated by Newton's second law: F=m*a, an acceleration results.
You only need to know the equation F=ma to comprehend how force overrides inertia; take note that a stands for acceleration, which is the change in speed. Therefore, any net force will cause some acceleration, regardless of how much mass there is or how little force there is. All objects have the propensity to resist changes in motion, which is known as inertia. Unless a force acts on a moving object to modify its speed or direction, inertia causes it to continue traveling at the same velocity (speed and direction). Additionally, it keeps an object in rest still.
The "sum of the product of mass" of each particle with the "square of its distance from the axis of rotation" is the formula for the moment of inertia.
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A Ping-Pong ball hangs from a string that is attached to the rear view mirror of a parked car. The driver side window is open, and the passenger side window is closed. A strong breeze blows along the driver side of the car. What happens to the Ping-Pong ball? Assume the breeze is laminar and that Bernoulli’s equation applies. A Ping-Pong ball hangs from a string that is attached to the rear view mirror of a parked car (see A Ping-Pong ball hangs by a string from a car rearview mirror. The driver side window to the left of the mirror is open, while the passenger side window to the right of the mirror is closed.). The driver side window is open, and the passenger side window is closed. A strong breeze blows along the driver side of the car. What happens to the Ping-Pong ball? Assume the breeze is laminar and that Bernoulli’s equation applies.
a.The ball does not move in either direction.
b.The ball swings towards the passenger side.
c.The ball swings towards the driver side.
The answer is ball swings towards passenger side. correct option is (B).
Bernoulli's equation = P+1/2ρv^2+ ρgh=Constant,
so
P1+1/2ρv1^2+ ρgh1= P2+1/2ρv2^2+ ρgh2
(v1^2-v2^2)=g(h2-h1)
So from the formula we can see that the change in velocity depends on the height difference, and the wind blows the ping pong ball will move which will make a height difference and hence the ball will swing.
What is Bernoulli's equation-
According to the Bernoulli's principle of fluid dynamics, a fluid's speed increases at the same time as its static pressure or potential energy decreases.
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