3.04 ml of water needed to diluting by a factor of 50.
How do you calculate the dilution of a solution?Dilution is the procedure in question. The following equation can be used to relate the concentrations and volumes before and after a dilution: M1V1 = M2V2, where M1 and V1 are the volume and molarity of the original concentrated solution, respectively, and M2 and V2 are those of the final diluted solution, respectively.A diluted solution is one that has a low solute content. A concentrated solution is one that contains a lot of the solute. The concentrated solution can be created by adding more solute to the dilute solution. The concentrated solution can be made diluted by adding more solvent.(initial concentration)(initial volume) = (final concentration)(final volume)
(50x)(X ml) = (12x)(4 ml)
X ml = (12x)(4 ml) / 50 x
X ml = 0.96 ml of 12x TBE
final volume - initial volume = volume of diluent
4 ml total - .96 ml of 10x TBE = 3.04 ml water
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what is the total work wfric done on the block by the force of friction as the block moves a distance 7.00 m up the incline?
The block's kinetic energy remains unchanged because it is travelling at a constant pace.
Work is the change in kinetic energy, and since there has been no change, there has been no work done on the block.
What Is Work?
A force must be applied in order to produce work, and there must also be motion or displacement in the force's direction.
The amount of work performed by a force acting on an item is equal to the force's magnitude times the distance travelled in the force's direction.
What is the formula for work done?
The work W is equal to the force f multiplied by the distance d, or W = fd, to mathematically describe this idea.
The work done is given by W = fd cos if the force is applied at an angle of to the displacement.
Therefore, here, the total work will be the product of the frictional force and distance that is 7m.
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What happens to the gravitational force between two objects when the distance between them is halved class 9?.
If the distance between the two objects is reduced to half, the force between them will rise by four times.
The initial distance between two objects is denoted by "r," the final distance is denoted by "r/2," the masses of the two things are denoted by m1, m2, and G is the universal gravitational constant.
Initial force F1 is defined by Newton's law of gravitation,
F1 = G × m₁m₂/ r²
The final force F' = G × m₁m₂/ (r/2)²
= 4G × m₁m₂/ r²
= 4F
As a result, the force will increase four times when the distance between two objects is halved.
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The illustration below shows three toy ducks floating on water, moving up and down as a wave travels to the right with a velocity of 3 m/s.Which of the following is the frequency of the wave?A. 0.75 Hz
B. 1.33 Hz
C. 1.5 Hz
D. 6.0 Hz
The illustration below shows three toy ducks floating on water, moving up and down as a wave travel to the right with a velocity of 3 m/s, the wave frequency is 0.75Hz
Wave frequency is the number of waves that travel through a fixed location in a specific amount of time. The hertz (Hz) is the SI unit for wave frequency, with 1 hertz equaling 1 wave passing a fixed point in 1 second. A greater wave has much more energy than a lower-frequency wave that has the same amplitude. Because higher frequency waves have closer crests, they have shorter wavelengths.
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what height does a frictionless playground slide need so that a 35 kg child reaches the bottom at a speed of 6.3 m/s ?
The height of the frictionless playground slide is 2.155 meters
What is kinetic and potential energy ?An object possesses kinetic energy when it is in motion. A force needs to be applied if we want to accelerate an object. We must use effort to apply a force. The object will be moving at a new constant speed once the operation is finished and energy has been transferred to it.
Potential energy is a form of stored energy that is dependent on the arrangement of a system's components. When stretched or squeezed, a spring has higher potential energy. When lifted above the ground, a steel ball has more potential energy than when it is brought to rest on the ground.
Kinetic energy = Potential energy
K. E = 0.5m v² ; P.E = mgh
0.5mv² = mgh
Dividing both sides by m, we get ;
gh = 0.5v²
h = [(0.5v²) ÷ g]
h = (0.5 × 6.5²) ÷ 9.8
height = 2.155 m
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Compared to an electron in the first electron shell of an atom an electron in the third shell.
They have more energy. One 1s orbital and two electrons are contained within the first shell. 8 electrons are located in the second shell, with 2 in a 2s orbital and 6 in three 2p orbitals.
What is a electron in an atom?The elementary electric charge of the electron is a negative one, making it a subatomic particle. Due to their lack of components or substructure, electrons, which are part of the lepton particle family's first generation, are typically regarded to be elementary particles.Electrons are fundamental to many physical processes, including gravity, electromagnetic interactions, weak interactions, electricity, magnetism, chemistry, and thermal conductivity.For neutrally charged species, the number of electrons in an atom is equal to the atomic number of an element. This indicates that an element has an equal amount of protons and electrons. Consequently, there are 8 electrons in oxygen.Three basic characteristics of an electron in an atom are charge, spin, and orbital angular momentum, the latter of which describes the electron's orbital motion around the nucleus.To learn more about electron refer :
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A student is conducting an experiment to analyze the mechanical energy of a block-spring system. The student places a block of mass 2kg on a horizontal surface and attaches the block to a horizontal spring of negligible mass and spring constant 100N/m, as shown in the figure. There is negligible friction between the block and the horizontal surface. The other end of the spring is attached to a wall. The block-spring system is initially at the spring's equilibrium position.
The student wants to collect data of the block-spring system that can be used to determine the work done on the spring by the block when the spring is compressed. Which of the following includes only the measuring devices that the student will need in order to collect the data?
Force probe and meterstick
Out of the given options, the measuring devices that the student will need in order to collect the data to determine the work done on the spring by the block are Force probe and meterstick.
W = F d cos θ
W = Work done
F = Force
d = Distance
θ = Angle between force and displacement vector
Here θ = 0°. So,
W = F d
The force applied on the block can be measured using a force probe. The force sensors essentially measure the deformation of an elastic support subject to the force. The distance that the block moves can be measured using a meter stick.
Therefore, in order to collect the data the student will need Force probe and meterstick.
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A was of sticky clay of mass m is hurled horizontally at a wooden block of mass M initially at rest on a horizontal surface. The clay sticks to the block. After impact, the block slides a distance d before coming to rest. If the coefficient of friction between the block and the surface is μ. what was the speed of the clay immediately before impact?
If the coefficient of friction between the block and the surface is μ. what was the speed of the clay immediately before impact:
solution:-
1st conservation of momentum
(m1 * v1i) + (m2 * v2i) = (m1 +m2) * vf
v2i = 0 m/s because the wooden block is at rest
(m1 * v1i) + (m2 * 0) = (m1 +m2) * vf
(m1 * v1i) = (m1 +m2) * vf
Equation #1
vf = (m1 * v1i) ÷ (m1 +m2)
vf is the velocity of the clay and block as they slide a distance d before coming to rest.
2nd conservation of energy.
The work of friction will reduce the kinetic energy of the clay and block to 0 Joules as the clay and block slide across the horizontal surface.
Initial Kinetic energy of the clay and block = ½ * (m1 +m2) * vf^2
Work of friction = µ * (m1 +m2) * g * d
Final KE = 0
Initial Kinetic energy of the clay and block – Work of friction = 0
[½ * (m1 +m2) * vf^2] – [µ * (m1 +m2) * g * d] = 0
[½ * (m1 +m2) * vf^2] = [ µ * (m1 +m2) * g * d]
Divide both sides by (m1 +m2)
[½ * vf^2] = [ µ * g * d]
vf^2 = [2 * µ * g * d]
Equation #2
vf = [2 * µ * g * d]^0.5
Equation #1
vf = (m1 * v1i) ÷ (m1 +m2)
set Equation #1 = Equation #2
(m1 * v1i) ÷ (m1 +m2) = [2 * µ * g * d]^0.5
Multiply both sides by (m1 +m2)
(m1 * v1i) = (m1 +m2) * [2 * µ * g * d]^0.5
Divide both sides by m1
v1i = (m1 +m2)/m1 * [2 * µ * g * d]^0.5
Speed is the gap traveled in step with unit of time.
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When a comet is within the inner solar system, its visible tails point __________.
When a comet is within the inner solar system, its visible tails point away from the Sun.
What is the Sun?The Sun can be defined as an astronomical (celestial) body that is typically found within the solar system around which planetary (astronomical) bodies orbit, and whose light shines on planet Earth to differentiate day and night.
What is a comet?In Astronomy, a comet can be defined as the cosmic, small snowballs of volatile frozen gases, dust, and rock that are orbiting the Sun. This ultimately implies that, comets comprises a small body of volatile ices that are in orbit around the Sun.
Based on astronomical records and information, the visible tail of a comet points way from the Sun when it is within the inner solar system.
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Shrinking Loop. A circular loop of flexible iron wire has an initial circumference of 160cm , but its circumference is decreasing at a constant rate of 15.0cm/s due to a tangential pull on the wire. The loop is in a constant uniform magnetic field of magnitude 0.800T , which is oriented perpendicular to the plane of the loop. Assume that you are facing the loop and that the magnetic field points into the loop.Part AFind the magnitude of the emf E induced in the loop after exactly time 9.00s has passed since the circumference of the loop started to decrease.Express your answer numerically in volts to three significant figures.Part BFind the direction of the induced current in the loop as viewed looking along the direction of the magnetic field.
The magnitude of the emf E is 0.0047 V, The Direction of the induced current is clockwise.
What is Emf and current?
In electromagnetism and electronics, an electromotive force is an energy transfer to an electric circuit per unit of electric charge, measured in volts. Devices called electrical transducers to provide an emf by converting other forms of energy into electrical energy.
An electric current is a stream of charged particles, such as electrons or ions, moving through an electrical conductor or space. It is measured as the net rate of flow of electric charge through a surface or into a control volume.
induced emf e = dphi /dt
so we need an expression for phi = BA = Bpi r^2
and since circumference C = 2 pi r,
we can write that as phi = BA = B* pi (C^22/4 pi^2 2)
phi = BC^2/ 4p
Therefore d phi /dt = (BC/2pi ) (dC/dt)
since we know C is a function of t.
after 8 seconds, the circumference is 160 - 9*15 = 25 cm.
= (0.8)(0.25/2*3.14) )(0.15)
Emf= 0.00477 V or 4.77 mV
-----------------------------------------------
induced current I = emf/R (direction is clockwise)
Hence, the magnitude of the emf E is 0.0047 V and the Direction of the induced current is clockwise.
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a 60-lb uniform thin panel is placed in a truck with end a resting on a rough horizontal surface and end b supported by a smooth vertical surface. knowing that the panel remains in the position shown, determine (a) the maximum allowable acceleration of the truck, (b) the corresponding minimum required coefficient of static friction at end a.
The maximum allowable acceleration of the truck is 0.544, the corresponding minimum required coefficient of static friction at end is 34.64.
What is acceleration?
Acceleration describes the speed and direction changes in velocity over time. Acceleration refers to the change in speed or direction of an item or point traveling straight forward. Due to the constant change in direction, motion on a circle accelerates even while the speed is constant.
What is static friction force?
Static friction occurs when an object is subjected to a force that is opposed by the frictional force; as a result, the object is kept at rest until the static friction force is removed. When there is kinetic friction, an object is not allowed to move.
Free body diagram
When the acceleration of the truck is maximum there is no contact between the parallels and the waves therefore, the reaction force at point "B" will be zero.
Mₐ= (ma) d
= (w* 2.5 cos 60°) = (ma 2.5 sin 60°)
=( 60*2.5 cos 60°)= (60/32.2 *a*2.5 sin 60°)
a= 15.89 ft/ s²
Equation of equilibrium in y- direction
Fy=0, Nₐ=w=60lb
Equation of equilibrium in x direction
Fₓ= max
F= mₐ (60/32.2*18.59)
f= 34.64
and as frictional force in μN
34.64= μ*60
μ= 0.544
Therefore, the maximum allowable acceleration of the truck is 0.544, the corresponding minimum required coefficient of static friction at end is 34.64.
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How is risk of collision calculated?.
Taking compass bearings is one of the maximum important ways of figuring out the danger of collision. good visibility is wanted to use this technique and a series or quantity of bearings need to be taken.
On smaller vessels bearings may be taken the use of a hand-bearing compass, on large vessels, a bearing or azimuth ring is used.
As soon as you perceive a danger of collision, you should perceive an appropriate movement to avoid collision to make sure the vessels will pass at a safe distance. You should then take that action to avoid collision as quickly as it's miles appropriate to accomplish that. digital Bearing lines are used to take the bearing of goals. The EBL extends from its own delivery role to the circumference of the radar display. If the bearing remains steady with decreasing variety, the chance of collision exists.
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a vehicle with headlights separated by 1.80 m approaches an observer holding an infrared detector sensitive to radiation of wavelength 885 nm. what aperture diameter is required in the detector if the two headlights are to be resolved at a distance of 20.0 km?
The aperture diameter required in the detector if the two headlights are to be resolved at a distance of 20.0 km is 1.2 cm.
When a vehicle approaches with separated headlights S = 1.80 m and resolved at a distance of r = 20.0 km = 2 × 10⁴ m. The angle for the headlights is
S = θr
θ = S ÷ r
θ = 1.8 ÷ (2 × 10⁴)
θ = 9 × 10⁻⁵ radians
The Rayleigh criterion for the diffraction limit is the formula to calculate the aperture and limited angle with the radiation wavelength = λ = 885 nm = 885 × 10⁻⁹ m
θ = 1.22 × (λ ÷ D)
θD = 1.22 × λ
9 × 10⁻⁵ × D = 1.22 × 885 × 10⁻⁹
D = 1.0797 × 10⁻⁶ ÷ (9 × 10⁻⁵)
D = 0.012 m
D = 1.2 cm
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in which situation should you use high beams? in the fog or heavy snow when you're alone on a poorly lit road within 500 feet of an approaching vehicle within 300 feet behind a vehicle submit answer
Only use high beam lights in low traffic areas or on highways, especially if there are no other vehicles within 200 metres of them. High beam lights provide brilliant illumination.
In which of the following situations are high beams necessary?High beam headlights should be used when it is too dark to see the road ahead well enough to drive safely. Even the most seasoned drivers may find nighttime low visibility unnerving.
Which situations need the use of low beams?Low beams are the perfect choice if you don't want to blind other motorists while driving in traffic with your blazing high beams. Driving in heavy rain, snow, or fog requires the use of your low beam lights.
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consider the diffraction pattern produced by illuminating a double slit. show answer no attempt if the spacing between the slits d is very large, what happens to the spacing between the zero intensity points?
The space between various fringes grows as the light's wavelength rises because this is a wavelength-dependent property.
The wavelength, what is it?A waveform signal's wavelength is defined as the separation among identical locations (adjacent crests) in adjacent cycles as the signal travels through space or along a wire. This length in wireless systems is typically expressed in metres (m), centimeters (cm), or millimeters (mm) (mm).
What role does wavelength play in science?Since it dictates the character of the light, the wavelengths is a crucial component. Greens light has a frequency that is distinct from both blue and red light, and it has a wavelength that is distinct from neither of them.
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archimedes' principle can be used to calculate the density of a fluid as well as that of a solid. suppose a chunk of copper with a mass of 467.5 g in air is found to have an apparent mass of 431.4 g when completely submerged in an unknown liquid. (a) what mass (in g) of fluid does the copper displace? webassign will check your answer for the correct number of significant figures. g (b) what is the volume of copper (in cm3), using its density as given in this table? webassign will check your answer for the correct number of significant figures. cm3 (c) calculate the fluid's density and identify it. water
Archimedes' principle can be used to calculate the density of a fluid as well as that of a solid. If a chunk of copper with a mass of 467.5 g in air is found to have an apparent mass of 431.4 g when completely submerged in an unknown liquid. (a) The mass (in g) of fluid does the copper displace will be36.1 g (b) The volume of copper (in cm3), using its density will be 51.944 [tex]cm^{3}[/tex] (c) The fluid's density will comes out to be 0.694 g/[tex]cm^{3}[/tex].
Given,
The mass of the copper chunk, M = 467.5 g
Apparent mass of the copper chunk, m = 431.4 g
According to the Archimedes' principle
(a) The mass of fluid does the copper displaces = M - m
= 467.5 g - 431.4 g
=36.1 g
(b) To calculate the density of the copper chunk we must know its density, which is 9 g/[tex]cm^{3}[/tex],
So, volume of the copper = Mass (M)/density
= 467.5/9
= 51.944 [tex]cm^{3}[/tex]
(c) The density of the fluid will be the mass of the fluid divided by the volume, which can be represented as;
Density = Mass/ volume
= 36.1/51.944
= 0.694 g/[tex]cm^{3}[/tex]
Hence, the mass of fluid does the copper displaces will be 36.1 g, volume of the copper chunk will be 51.944 [tex]cm^{3}[/tex] and density of the fluid will be 0.694 g/[tex]cm^{3}[/tex].
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q7. a rod is free to slide on a frictionless sheet of ice. one end of the rod is lifted by a string. what would be the angle of the string to maintain the rod at rest? (acute angle, right angle, obtuse angle) explain your choice.
If a rod is free to slide on a frictionless sheet of ice and one end is lifted by a string, the angle of the string would be a right angle in order to maintain the rod at rest.
This is because in order for an object to be at rest, the forces acting on it must be balanced. In this case, the only forces acting on the rod are the force of gravity pulling the rod down and the force of the string pulling the rod up. If the string is at a right angle to the rod, the forces will be balanced and the rod will remain at rest.
If the string were at an acute angle (less than 90 degrees), the force of the string would not be strong enough to balance the force of gravity, and the rod would slide down. If the string were at an obtuse angle (greater than 90 degrees), the force of the string would be too strong and the rod would be pulled off the sheet of ice.
Therefore, the angle of the string must be a right angle in order to maintain the rod at rest on the frictionless sheet of ice.
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What is Law of Conservation of Matter explain using an example?.
The law of conservation of matter and the law of conservation of energy essentially state that neither type of energy can be created nor destroyed, only transformed. The process by which grapes ferment to produce wine is an illustration of the law of conservation of matter. The amount of matter in the reactants in the bottle doesn't change, but its chemical form does.
It is a fundamental tenet of classical physics that matter cannot be created or destroyed in an isolated system; rather, it can only be changed from one form to another. This means that despite the apparent changes that are seen, no matter is lost during any chemical or physical change that may occur with any substance.
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TRUE/FALSE. cross-sectional surveys can be used to establish baseline data prior to the initiation of longitudinal studies.
Answer: true
Explanation:
a resonant tank circuit consists of a 20 mh coil operating at a frequency of 950 khz. what is the inductive reactance of the coil?
Answer:
Inductive resistance of the coil 120 kΩ
Explanation:
Given:
L = 20 mH = 0.020 H - Coil inductance
f = 950 kHz = 950 000 Hz - Frequency
______________
XL - ? Inductive resistance of the coil
XL = 2·π·f·L
XL = 2·3.14·950000·0.020 ≈ 120 000 Ω or XL = 120 kΩ
identify the true statement from the following. laminar flow is characterized by the smooth flow of the fluid in layers that do not mix. turbulent flow is characterized by eddies and swirls that mix layers of fluid together.
Both of the statements, laminar flow is characterized by the smooth flow of the fluid in layers that do not mix and turbulent flow is characterized by eddies and swirls that mix layers of fluid together are true.
In fluid dynamics, laminar flow is shown by fluidic particles flowing smoothly in layers, with each layer moving smoothly past the adjacent layers with very less or no mixing. At low rate of displacements, the fluid starts to flow without any mixing, and adjacent layers slide past upon one another. And a turbulent flow is type of fluid flow where the fluid undergoes irregular fluctuations, or mixing with different layers.
Hence, both the statements are true.
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two children of mass 23 kg and 37 kg sit balanced on a seesaw with the pivot point located at the center of the seesaw. if the larger child sits a distance of 3.8 m from the pivot, then at what distance from the pivot point is the small child sitting in order to maintain the balance?
2.3 m is distance from the pivot point is the small child sitting in order to maintain the balance.
M1R1=M2R2
R2=M1R1/M2
R2=23×3.8÷37
R2=2.3 m
Distance is the length between two points or things, and it is directionless. Since distance is a scalar property, it only takes into account the total magnitude and ignores the start and finish locations. Being a scalar attribute, distance can only be positive or zero; it cannot be the opposite.
Although kilometers (km) and centimeters (cm) or millimeters (mm) can also be used to express shorter distances, the meter (m) is the most common unit of measurement for distance (mm). When calculating distance, the letter D is frequently used to denote the distance traveled.
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What are the 10 conjunctive adverbs?.
Accordingly, also, additionally, similarly, likewise, therefore, specifically, yet, although, still, then, additionally, incidentally, next, subsequently, unquestionably, unquestionably, yet, nevertheless, therefore.
Conjunctive words: What are they?Words that link other words or word groupings together are called conjunctions. Words, phrases, and sentences of equal significance are joined by a coordinating conjunction. There are three basic coordinating conjunctions: and, or, and but.
Which words that are conjunctions are some examples?The term used to join words, phrases, and clauses is called a conjunction. Conjunctions come in many shapes and sizes in English, but some of the more popular ones include and, or, but, because, for, if, and when.
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Calculate the angular momentum of a olid uniform phere with a radiu of 0. 115 m and a ma of 15. 0 kg if it i rotating at 5. 70 rad/ about an axi through it center
The angular momentum of a solid uniform sphere of radius 0.115 m and mass 15.0 kg if it rotates about an axis at its center at 5.70 rad/s
A uniform solid sphere of radius (r) = 0.115m
Mass of sphere (m)= 15kg
Rotation speed = 5.70 rad/s about an axis at its center
To find the angular momentum about its axis L =IW
I = moment of inertia = 2/5mr^2
W= speed of rotation
L= (2/5)*15*0.115*0.115*5.70
L = 0.452295kgm2/s
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Light is emitted when an electron:
makes a transition to a lower energy level.
The electron in an atom is boosted to a higher orbit and excited. When the electron returns to its original state, it de-excites and emits a photon of light.
When the electron changes levels, it decreases energy and the atom emits photons. The photon is emitted with the electron moving from a higher energy level to a lower energy level.
The electron absorbs the energy and jumps to a higher energy level. In the reverse process, emission, the electron returns to the ground state by releasing the extra energy it absorbed. Recall that the electrons must occupy one of the energy levels.
The electrons in an atom exist in various energy levels. When an electron moves from a lower energy level to a higher energy level, energy is absorbed by the atom. When an electron moves from a higher to a lower energy level, energy is released.
When an electron falls from a higher energy to a lower energy level, it accelerates. We know accelerating charged particle radiates energy in the form of electromagnetic radiation.
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calculate the recoil velocity in the horizontal direction, in meters per second, of a 0.95-kg plunger that directly interacts with a 0.0205-kg bullet fired at 615 m/s from the gun. take the firing direction to be the positive direction.
The recoil velocity in the horizontal direction of the plunger is 13.27 m/s
What is recoil in physics?Recoil is the backward force or momentum produced by an object such as a gun while discharging at a very high rate of velocity.
This can be understood by the famous Newton’s third law of motion in physics.
What are Newton's laws of motion?The three fundamental laws of classical mechanics known as Newton's laws of motion describe how an object's motion and the forces acting on it interact.
Newton's first law states that unless a net external force acts on an object, it will either remain at rest or continue moving at a constant speed.
According to the second law, an object's force is determined by multiplying its mass by its acceleration.
The third law of motion by Newton states that equal but diametrically opposed forces always act in pairs. There is an equal but opposite reaction to every action, to put it another way.
Given Data:mass of bullet, m1=0.0205kg
velocity of bullet before firing, u1=0 m/s
velocity of bullet after firing, v1=615 m/s
mass of plunger,m2=0.95kg
velocity of gun before firing,u2=0 m/s
Let velocity of gun after firing be, v2
From law of conservation of momentum,
m1u1+ m2u2= m1v1+ m2v2
m1×0+ m2×0=0.0205×615 + 0.95×v2
⟹0=12.60+0.95v2
⟹ v2=−13.27 m/s
This means gun moves in opposite direction to bullet, which is called recoil.
Thus, recoil velocity of plunger is equal to
13.27 m/s
Here, the negative(- ve) sign shows that plunger moves in the opposite direction of bullet.
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What would be the orbital speed and period of a satellite in orbit 1.22 ✕ 10^8 m above the Earth?
The orbital speed and orbital period of a satellite are 1765 m/s and 4.56 ×10⁵s.
What is orbital speed?The orbital speed can be described as the speed at which it orbits around either the barycenter or its speed relative to the center of mass of the most massive body.
Given the distance of the satellite from Earth's surface = 1.22 ×10⁸ m
The distance of the satellite from the center of the earth:
r = 1.22 ×10⁸ m + 6.38 ×10⁶
r = 1.284 ×10⁸ m
The orbital speed of the satellite : [tex]V = \sqrt{\frac{GM}{r} }[/tex]
The mass of the earth, [tex]M = 6 \times 10^{24} Kg[/tex]
[tex]V=\sqrt{\frac{6\times 10^{24}\times 6.67 \times 10^{-11}}{1.284 \times 10^{8}} }[/tex]
V = 1765 m/s
The orbital period of the satellite:
[tex]T =\frac{2\pi r}{V}[/tex]
[tex]T=\frac{2\times 3.14\times 1.284 \times 10^8}{1765}[/tex]
T = 4.56 ×10⁵ s
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which type of hose stream is created by specialized nozzles such as cellar nozzles, piercing nozzles, or chimney nozzles?
Answer:broken stream
Explanation:
if you see a lightning bolt in the distance and 15 seconds elapse before you hear the corresponding thunder, how far away was the lightning bolt?
The distance of the lightning bolt from the point is 850m
What is speed of sound in air?The speed of sound is defined as the distance through which a sound wave’s point, such as a compression travels per unit of time. The speed of sound remains the same for all frequencies in a given medium under the same physical conditions.
We can use echo formula to calculate the distance at which the sound in air travels. it is given by v= 2x/t
where v is the speed of sound in air which is 340m/s and x is the distance traveled and t is the time.
therefore,
340= 2x/5
2x= 1700
x= 1700/2
x= 850m.
Therefore the distance of the lightning bolt to the point of staying is 850m.
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It takes the elevator in a skyscraper 4. 0 s to reach its cruising speed of 10 m/s. A 60 kg passenger gets aboard on the ground floor.
Before the elevator starts moving, the weight is 588 N; during acceleration, it is 738 N; and at cruising speed, it is 588 N.
State A: Just before the elevator moving.
At first, the 60 kg passenger's weight equals (60 kg)*(9.8 m/s2) = 588 N.
The elevator speeds up from state A to state B
Between states A and B, there is an acceleration of
a=10 m/s/(4 s) = 2.5 m/s2
The passenger is subjected to an inertial force of (60 kg)*(2.5 m/s2) = 150 N.
The passenger's actual weight is 588 + 150, which is 738 N.
Following state B: dynamic stability
Following state B, the elevator runs continuously while the passenger is in a condition of dynamic balance.
Thus, the weight of the passenger is 588 N.
Before the elevator starts moving, the weight is 588 N; during acceleration, it is 738 N; and at cruising speed, it is 588 N.
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Complete Question :
It takes the elevator in a skyscraper 4.0 s to reach its cruising speed of 10 m/s. a 60 kg passenger gets aboard on the ground floor. determine the passenger's weight, before the elevator starts moving, while the elevator is speeding up, and after the elevator reaches its cruising speed.
The capacitors in each circuit are fully charged before the switch is closed. Rank, from longest to shortest, the length of time the bulbs (resistors) stay lit in each circuit.
(picture)
The idea here is to simplify circuit analysis by using resistors and capacitors. Using the time constant for every circuit, rank the circuits from longest to shortest. The circuit's time constant is ranked as follows: C > A = E > B > DC > A = E > B > D.
A capacitor is a device that stores electrical energy in an electric field by building up electric charges on two nearby surfaces that are isolated from one another. It has two terminals and is a passive electronic part.
Capacitance is the name for a capacitor's effect. While there is some capacitance between any two electrical conductors that are close to one another in a circuit, a capacitor is a component made to increase capacitance. Condenser is still used in a few compound names for the capacitor, like condenser microphone. Capacitors are made from a wide range of materials and come in a wide variety of shapes, sizes, and designs. They all have at least two electrical conductors, known as plates, separated by an insulating layer (dielectric).
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