Answer:
Explanation:
Given:
H = 3.6 m
V = 0 m/s
g = 9.8 m/s²
_________
V₀ - ?
Potential energy = m·g·H
Kinetic energy = m·V₀² / 2
Let's equate:
m·V₀² / 2 = m·g·H
V₀² / 2 = g·H
Starting speed:
V₀ = √ ( 2·g·H )
V₀ = √ (2·9.8·3.6) ≈ 8.4 m/s
What is the correct order of the planets in the solar system, starting closest to the sun?.
Answer:
Mercury
Venus
Earth
Mars
Jupiter
Saturn
Uranus
Neptune
and then drawf planets
two long, straight wires are parallel and 49 cm apart. (a) if each wire carries a current of 74 a in the same direction, what is the magnitude of the magnetic force per meter (in n/m) exerted on each wire?
The magnetic force between the two parallel wires is 2.24 x 10⁻³ N/m.
What is the force between the two parallel wires?
The magnetic force between the two parallel wires is calculated by applying the following kinematic equation as shown below.
F/L = μI₁I₂/2πr
where;
μ is the permeability of free space = 4π x 10⁻⁷ Tm/AI₁ is the current in the first wireI₂ is current in the second wireF/L is force per unit lengthr is the distance between the two wiresThe magnitude of the magnetic force per meter (in n/m) exerted on each wire is calculated as;
the current in the first wire = the current in the second wire = 74 A
Substitute the given parameters and solve for the force per unit length of current between the two parallel wires.
F/L = ( 4π x 10⁻⁷ x 74 x 74)/(2π x 0.49)
F/L = 2.24 x 10⁻³ N/m
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What is the magnitude of the gravitational force between an electron and a proton separated by a distance of 1.0 x 10-10 meter?
A proton and electron separated by 1.0 x 10-10 meters exert 1.0 x 10-47N of gravitational force on each other.
What exactly is gravitational, in simple terms?The gravitational force will bring together any two mass-containing objects. The gravitational force is described as attracting because it consistently tries to draw masses together and never tries to push them apart. In reality, you and every other item in the universe are pulling toward one another.
What is the origin of gravity?
All of the mass on Earth is what creates gravity. The cumulative gravitational attraction of all of its mass exerts pressure on all of the body's mass. Your weight is determined by that. Furthermore, your weight would be lower if you were on a planet with a lower mass than Earth.
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what is vertical wind shear? change in the wind speed and/or direction with height change in the vertical wind with distance north or south change in wind speed with direction north or south change in wind direction with horizontal distance
The correct answer is option D.
Vertical wind shear changes in wind direction with horizontal distance.
Generally, atmospheric wind is referred to as vertical or horizontal wind shear. It is also called wind gradient.
Simply put, win shear is defined as the change in wind speed over a particular distance.
More specifically, vertical wind shear refers to the alter in wind speed along altitude while the horizontal change refers to the change in wind speed that occurs along lateral side or position of the atmosphere in a given altitude.
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rgb color television and computer displays use cathode ray tubes that produce colors by mixing red, green, and blue light. if we look at the screen with a magnifying glass, we can see individual dots turn on and off as the colors change. using a spectrum of visible light, determine the approximate wavelength of each of these colors. what is the frequency and energy of a photon of each of these colors?
The frequency and energy of a photo of each of the colors indicated above are calculated using the formula for the frequency of light and the formula for energy in relation to Planck's constant.
What is the equation for energy and Frequency?
In this case, the formula for energy and frequency is given as follows:
E = Hv
Where
E - Energy (in eV)
h - Planck's constant (4.1357 x 10⁻15 eVs)
v-frequency (in Hz)
v = c/λ
Where,
v - frequency (Hz)
c - speed of light (3x 10⁸) ms⁻¹
λ - wavelength (in meters)
The energy of the photon for Red light is given as follows:
E = (4.6 x 10¹⁴) (4.1357 x 10⁻¹⁵)
E = 1.902 eV
Frequency is given as:
v = [3×10⁸ms−¹] /[650x×10⁻¹⁹m]
v = 4.6 x 10¹⁴Hz
For Green light:
Energy is given as:
E = (5.4 x 10¹⁴) (4.1357 x 10⁻¹⁵)
E = 2.234 eV
Frequency is given as:
v = [3×10⁸ms−¹] /[550x×10⁻¹⁹m]
v = 5.4 x 10¹⁴Hz
For Blue light:
Energy is given as:
E = (6.6 x 10¹⁴) (4.1357 x 10⁻¹⁵)
E = 2.729 eV
Frequency is given as:
v = [3×10⁸ms−¹] /[450x×10⁻¹⁹m]
v = 6.6 x 10¹⁴Hz
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a 0.20-kg ball on a stick is whirled on a vertical circle at a constant speed. when the ball is at the three o'clock position, the stick tension is 16 n. find the tensions in the stick when the ball is at the twelve o'clock and at the six o'clock positio
The tension when the stick is at six o clock will be 17.96 N and when the stick will be on 12 o clock the tension will be 14.04 N.
What is tension and how the tensions are calculated out to be so ?Tension is actually the force acting and that both have same unit Newton whose formula is T =mg + ma.Here the question is saying that0.20 kg ball in a stick is whirled on a circle at a constant speed.When the stick would be at 6 position , T6 = mg+T3 = 0.2 x 9.8 +16 = 17.96 N.When the stick would be at 12 position, T12 = T3-mg = 16- o.2x9.8 = 14.04N.Hence when a 0.20 kg ball on a stick whirling on a verticle circle at constant speed , the tension at six and twelve will be 17.96 N and 14.04N respectively.To know more about speed visit:
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one way to avoid emi problems is to . select one: a. run low-voltage cable close to power cables b. use fluorescent lights c. use ungrounded metal pathways d. terminate unused conductors at both ends
One way to avoid EMI problems is to use fluorescent lights. Option B.
Fluorescent lights deteriorate quickly especially if they are installed in a place where they are turned on and off frequently. Fluorescent lights shorten their life each time they are turned off and on. This can lead to premature failure and you will end up spending more money replacing bulbs more often.
EMI from fluorescent lighting systems is rare. Designers considering the use of electronic ballasts can greatly reduce the potential for EMI problems with careful planning. EMI is caused by the close relationship between electricity and magnetism. Any flow of electricity creates a small magnetic field. Conversely when the magnetic field moves an electric current is generated.
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eighteen-month-old annabelle looks in the mirror, sees that the reflection in the mirror has a mark on her nose, and touches her own nose. what can we conclude?
We can conclude that Recognizing herself. The process of reflecting light rays that fall on a polished surface is known as reflection of light.
What is Reflection?
It assists us in gaining understanding and determining how to proceed. The wave front returns to the medium from which it originated is referred to as reflection. Reflection of light, sound, and water waves are common examples.
Reflection is the process of investigating and analyzing oneself, one's perspectives, characteristics, experiences, and actions / interactions. It assists us in gaining understanding and determining how to proceed.
The process of reflecting light rays that fall on a polished surface is known as reflection of light. The angle of reflection is always equal to the angle of incidence, according to reflection laws. (ii) The incident, reflected, and normal rays all lie in the same plane.
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Recognizing herself, we can infer. Reflection of light is the process of reflecting light rays that strike a polished surface.
What is Reflection?It helps us understand and make decisions about how to move forward. Reflection is the process by which the wave front returns to the original medium. Examples of reflection include the refraction of light, sound, and water waves.The act of reflecting involves looking within and examining one's perspectives, traits, experiences, and behaviors and relationships. It helps us understand and make decisions about how to move forward.Reflection of light is the process of reflecting light rays that strike a polished surface. According to reflection laws, the angle of reflection is always the same as the angle of incidence. (ii) The same plane is shared by the incident, reflected, and normal rays.To learn more about Reflection refer to:
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what would be your best estimate for the normalized ground state wavefunction of the quartic oscillator?
The variational technique is one strategy to approximate the ground state with the lowest energy and some stimulated states in quantum mechanics.
What is variational method principle in quantum mechanics?This makes it possible to calculate approximations of wavefunctions, like molecular orbitals. The variational concept serves as the method foundation. The process entails selecting a "trial wavefunction" based on one or more parameters, then identifying these parameters values that result in the energy expectation value being as low as possible. By setting the parameters to these values, a wavefunction that approximates the ground state wavefunction is produced, and the energy in that state's expectation value serves as an upper bound on the ground state energy.
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true or false the newton-raphson method will converge very rapidly when close to finding the root of an equation.
When approaching the root of an equation, the Newton-Raphson method will quickly converge. this is a false.
" Root is a mathematical symbol that stands for the square root symbol or square root sign. In words, we call this symbol radical. The various types of symbols that are used to carry out arithmetic operations may have been covered in your math classes. In mathematics, the square root of any number is denoted by the root symbol.
As an illustration, 2 is used to symbolize the square root of 2. Similarly, for other natural numbers like 5, 6, 7, 8, 10, etc., we can write their corresponding square roots as 5, 6, 7, 8, and 10, respectively. The square root that is positive is always represented by this symbol.
Radicand: The number that appears beneath the root is referred to as the radicand, not the square root symbol.
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How do plates move in relation to each other at convergent boundaries?
When plates commute in the exact direction it collides, and the plates move to other at convergent boundaries.
The lighter, dense, and much more elastic oceanic plate dips underneath the thicker, more stiff continental plate whenever a continental plate encounters a marine plate.
It's known as subduction. Deep ocean trenches, like the one that runs down South America's west coast, are created by subduction.
The continent's undercut rocks start to melt. On occasions, a chain of eruptions forms as the hot magma rises to the surface and travels through the continent.
Nearly 80% of earthquakes happen along convergent borders when plates are being pushed together.
Destruction, when two continental plates crashes, is just another kind of convergent boundary. The plates collapse and are propelled upward since neither is heavier compared to the other.
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A truck is traveling clockwise around a circular track at a constant speed of 10 m/s.
The track is flat and has a radius of 100 m. While driving around the track, the driver
is describing his experience to his driving coach:
"The whole time I'm traveling around the track, I feel like I'm being pushed to the left
even though I'm constantly turning right. I'm always leaning toward the outside of
the circle."
Which best explains the Physics concept of why the driver felt this?
The best suitable answer is Option 4 " The driver experienced centrifugal "force" which was actually just his inertia .
What is centrifugal force ?
A hypothetical force called centrifugal force, which is unique to particles travelling in a circle, is a force that has the same strength and dimensions as the centripetal force, but acts in the opposite direction.
A stone rotating in a horizontal plane while attached to a string that is fastened to a ground-based post experiences a constant change in velocity and acceleration in the direction of the post. The square of the speed divided by the length of the string gives us the acceleration.
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For a skateboard with a negative acceleration, which of the following statements is always true?
1. The initial velocity of the skateboard will be greater than it’s final velocity.
2. The skateboard will have a negative displacement.
3. The final velocity of the skateboard will be positive.
4. The final velocity of the skateboard will be negative
5. The skateboard is losing speed
With a negative acceleration, the skateboard's beginning velocity will be higher than its end velocity.
The correcty answer is 1
How do you calculate beginning velocity in the absence of time?Based on the assumption that the object's energy is conserved, its velocity equals the square root of twice square product of the its acceleration or the distance it travels. This relationship also depends on the object's initial velocity.
What are starting and final velocities?When gravity first exerts force on an object, its initial velocity indicates how quickly it moves. The final velocity, on the other hand, is a vector quantity that determines the rate and direction of the a moving body when it has reached its maximum velocity.
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a ball tied to the end of a string is being whirled around in a circle at constant speed. what can you say about the work done by the tension in the string on the ball?
The work done by the tension in the string on the ball - tension does no work at all is the correct answer.
What is tension in the string?The forces tugging on the rope from either end cause the tension in a particular strand of string or rope. Keep in mind that force is defined as mass times acceleration. If the rope is stretched tightly, any change in the mass or acceleration of the objects it is supporting will result in a change in the tension of the rope.
A force known as tension is particularly effective on medium-length materials like rope and cable that are also flexible. A gravitational force still exists in tension. When the body is traveling upward, the tension is denoted by the formula T = W + ma. The thickness is the same as T = W - ma when the body descends.
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answer the following questions for projectile motion on level ground assuming negligible air resistance (the initial angle being neither nor ): (a) is the velocity ever zero? (b) when is the velocity a minimum? a maximum? (c) can the velocity ever be the same as the initial velocity at a time other than at ? (d) can the speed ever be the same as the initial speed at a time other than at ?
Explanation
a) The velocity will never be zero. The velocity at the highest point of the projectile will be the smallest, equal to the horizontal component of the initial velocity.
b) The velocity will be zero when the kinetic energy is zero. When kinetic energy is at its lowest, potential energy is at its highest. Because potential energy is greatest at the highest point, velocity is greatest at the highest point.
c) Because a constant force of gravity acts on the projectile at all times, velocity will never be the same as initial velocity.
d) When the bullet bounces back and strikes the ground, the speed equals the initial speed (at t = 0), because the height is zero and the kinetic energy is equal to the initial energy.
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what property of a star can you deduce by observing spectroscopic binaries? eclipsing binaries? visual binaries?
A binary star system consists of two stars that are gravitationally sure and orbit each other. Binary stars in the night time sky appear as a single object to the bare eye, but telescopes frequently remedy them as separate stars.
A binary stars have orbit a common center of mass. The first one star is brighter of the two, and other is the fainter (classified as A and B, respectively).
Visual binaries : A visual binary system is a binary system in which each individual star in the system can be individually resolved with a telescope. Longitudinal observations can then be made to indicate the relative positions of the members of the system. Over time, this data is collected and used to calculate star orbits. Visual binaries tend to be systems that are relatively close to us, being able to resolve individual stars.
Eclipse Binary system : Photometry is used as a third technique for detecting binary structures. the obvious value of many stars changes regularly. this could be due to one of two elements. It can be a single star that has its inherent luminosity change. Such stars are called pulsating variables . the second alternative is that it's far a binary gadget with an orbital plane that is side-on to us, inflicting the issue stars to frequently eclipse each other. Such systems are referred to as eclipsing binary structures.
Spectroscopic binaries : A binary star having components that are not sufficiently separated to be resolved by a telescope, known to be a binary only bythe variations in wavelength of emitted light that are detected by a spectroscope.
Spectroscopic binaries are seen from their line spectrum, by means of following the Doppler shift .
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What is The reason at which carbon dating works?
5.00-kg box slides 5.00 m across the floor before coming to rest. what is the coefficient of kinetic friction between the floor and the box if the box had an initial speed of 3
The coefficient of kinetic friction among the floor and the field is 0.092.
Friction is a form of touch force. It exists among the surfaces which might be in touch. The frictional pressure depends at the person of the surface in touch. The rougher the ground, the greater the friction is worried. The frictional force is proportional to the pressing pressure, it's the load of the frame. it is independent of the region of the contact.
Calculation:-
mass = 5 kg
distance travelled = 5 m
initial speed = 3 m/s
v² = u² -2as
a = u²/2s
= 3²/2 × 5
= 0.9 m/s²
F = μkN
ma = μkmg
5×0.9 = μk 5 ×9.8
μk = 4.5/49
= 0.092
Friction is the force resisting the relative movement of strong surfaces, fluid layers, and material factors sliding in opposition to every different. There are numerous forms of friction: Dry friction is a strain that opposes the relative lateral motion of two strong surfaces in touch.
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A car moves at a velocity of 8.5m/s. It then accelerates at a constant rage of 2.5m/s/s for a total time of 5 second. How fast is the car moving at the end of the 5 second
The car would be moving with a velocity of 21 m/s at the end of the five seconds.
We know that the first equation of motion is ⇒ v = u + at (i)
Here, the car moves with an initial velocity, u = 8.5 m/s (ii)
The car accelerates at a constant rate, a = 2.5 m/s² (iii)
The total time during this process, t = 5 seconds (iv)
Putting the values of the initial velocity, acceleration, and time (ii, iii, and iv) in equation (i), we get ⇒ v = 8.5 + (2.5)(5)
v = 21 m/s
Therefore, the car moves with a final velocity of 21 m/s at the end of the five seconds.
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a plane electromagnetic wave, with wavelength 3.0 m, travels in vacuum in the positive direction of an x axis. the electric field, of amplitude 300 v/m, oscillates parallel to the y axis. what are the (a) frequency, (b) angular frequency, and (c) angular wave number of the wave? (d) what is the amplitude of the magnetic field component? (e) parallel to which axis does the magnetic field oscillate? (f) what is the time-averaged rate of energy flow in watts per square meter associated with this wave? the wave uniformly illuminates a surface of area 2.0 m2. if the surface totally absorbs the wave, what are (g) the rate at which momentum is transferred to the surface and (h) the radiation pressure on the surface?
Since, we know that magnetic field is always perpendicular to the z axis or electric field.
Calculation:-
lambda = 2.8m
v = 3*10^8m/s
v = f(lambda)
(a) f = 1.07*10^8hz
(b)angular frequency = 2pif
= 6.72*10^8rad/s
(c) wave number = 2pi/lambda
= 2.24
(d) B=E/c
= 300/(3*10^8)
=10^-6Tesla
(e) Magnetic discipline is perpendicular to wave propagation and electric powered subject
The magnetic discipline is perpendicular to the z-axis.
Electromagnetic waves are non-mechanical waves. Electromagnetic waves do no longer require a medium to propagate and may without problems pass via a vacuum. Electromagnetic waves propagate in all guidelines from the source of interference. The wave will keep transferring till something interrupts it. Electromagnetic waves vary from mechanical waves in that they do no longer require a medium for propagation.
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what is the average rotational latency of a hard drive rotating at 7,200 rpm or 120 revolutions per second?
The average rotational latency of a hard drive rotating at 7,200 rpm or 120 revolutions per second is 4.16 ms.
What is the average rotational latency?Half as long as it takes the disk to complete a full spin, that is how long the rotational delay is. Rotational speed is the rate at which an object revolves or rotates. It is determined by how many rotations an item completes in a given amount of time, unlike linear speed. Rotational speed is calculated as rotations per unit of time, whereas linear speed is calculated as distance per unit of time.Rotational delay is at its worst at 7200 RPM and is typically half that at 8.33 milliseconds (4.17 ms).Rotational lag on average: 4.16 msTypical search time: 8 msMax seek: 10.5 msTo learn more about rotational latency refer to:
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which imaging modality places time of flight information on the x-axis and echo amplitude on the y-axis?
Amplitude modulation, or AM, is a modulation method used in electronic communication, most frequently for radio wave transmission of messages.
What is amplitude mode?A common collective excitation associated with the spontaneous breaking of a continuous symmetry is the amplitude (Higgs) mode. We use a combination of stochastic analytic continuation and quantum Monte Carlo (QMC) simulations to look at the dynamics of the amplitude mode in a three-dimensional dimerized quantum spin system.In physics, amplitude refers to the most displacement or distance that a point on a vibrating body or wave can travel in relation to its equilibrium location.The method of amplitude modulation involves changing the amplitude of the wave signal before it is broadcast. It is frequently used to send information using a radio carrier wave and is known by the abbreviation AM. Electronic communication is where amplitude modulation is most commonly utilized.To Learn more About Amplitude modulation refer to :
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A metal block of mass 5kg lies on a horizontal platform. if a horizontal force of 8n applied to the block through its centre of mass just slides the block on the platform. what will be the coefficient of limiting friction between the block and the platform
Answer: the coefficient would be either 4 or 5
Explanation:
What accounts for the light and dark bands produced when monochromatic light reflects from a glass pane atop another glass pane?.
The waves that are reflected off the glass on the top and bottom surfaces of the air wedge interfere, which results in these bands. Interference between light waves reflected from the thin film's two sides.
Define monochromatic light.Electromagnetic radiation of a certain wavelength, whether visible or invisible, is monochromatic light.
Although in theory monochromatic light has exactly one wavelength, this is not practical, hence monochromatic light always comprises of a (relatively) narrow bandwidth of wavelengths. The color that the human eye can see when monochromatic light is in the visible spectral range is referred to as the spectral color. Lasers produce monochromatic light directly; a monochromator separates monochromatic light from a broadband light source.
Monochromatic light should only have one wavelength, according to theory. Monochromatic light is actually defined as having a narrow bandwidth.
A monochromator can be used to separate monochromatic light from polychromatic light.
In the visible wavelength range, monochromatic light is regarded as having spectral color.
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consider two cars moving along the same straight road in opposite directions. car a has a mass of 500kg500kg and has a constant speed of 20m/s20m/s ; car b has a mass of 800kg800kg and a constant speed of 15m/s15m/s . what can you say about the net forces on the cars?
The net force on both the cars car a and car B will be zero.
According to the first law of motion stated by Newton,
An object would continuously written it's state of motion or rest if the net force on the object is zero. It means that, no matter how many forces are working on the body if they all cancel out each other and the net force becomes zero the body will continue it's same state.
Also according to second law of Newton,
The force is rate of change of momentum with respect to time.
F = ma
Here, both the cars the car A of mass 500 kg and the car B of mass 800 kg are moving with a constant velocity of 20 m/s and 15 m/s respectively.
If the velocity of the car is not changing with time it means that there is no acceleration on the body.
If there is no acceleration on the body, then there is no net force on the body.
So, we can conclude hair that the net force on the cards is zero.
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Explain the relationships you see in your data tables, and whether they agree with Newton’s Second Law of Motion (Fnet=ma).
3rd and 6th row in second table do not agrees with the equation ( Force = mass * acceleration ) , rest follows the equation
There is a relation between force , mass and acceleration of the body , in a such a way that it agrees with newton's third law which is Force = mass * acceleration
All the given data in the table follows this relation except where
mass = 150 kg
a = 0.67 [tex]m/s^{2}[/tex]
F (given ) = 100 N
calculated force = ma = 150 * 0.67 = 100.5 N
mass = 300 kg
force (given) = 100 N
a = 0.33 [tex]m/s^{2}[/tex]
calculated force = ma = 300 * 0.33 = 99 N
rest of the data completely follow the equation F = ma
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a 500.0 kg elevator is pulled upward with a constant force of 5500.0 n for a distance of 50.0 m. what is the work done by the 5500.0 n force on the elevator?
The work done by the constant force to pulled the elevator upward is 275000 Joules.
The work done by any force is given by,
W = Fa
Where,
W is the work done,
F is the force applied,
s is the displacement along the direction of the force,
The force applied on the elevator to pull it upward is 5500N and the distance to which the elevator is pulled is 50 m.
Now, putting values,
W = 5500(50)
W = 275000 Joules.
So, the work done by the force to pull the elevator upward is 275000 Joules.
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Calculate the efficiency of a machine that requires 20 J of input work to do 10 J of output work. What is the efficiency of the machine? (in percent, but write the number only)
The efficiency of the machine is ξ= 50%.
Given - 20 joules and 30 joules are input and output work of the system respectively.
To find the efficiency of the system.
principle ;- Efficiency represents the capability of a system to do work .
Mathematically , efficiency has an equation that relates the input and output work and accurately provides the result.
Formula - ξ= οₙ/Iₙ x 100
οₙ = output work , Iₙ= input work
Calculations :- ξ= { 10/20 }x 100
ξ= 50%
Result- The Efficiency of the machine is 50%.
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an inelastic collision between two objects is characterized by the following a) total momentum of the system is conserved b) total energy of the system is conserved c) total kinetic energy of the system remains constant d) both a and b are true e) both a and c are true
An inelastic collision between two objects is characterized by the fact that a) the total momentum of the system is conserved. Choice A is correct
Inelastic collisions are the collisions in which the kinetic energy is lost. The momentum of the system is conserved in inelastic collisions, but kinetic energy is not. This is because some of the kinetic energy was transferred to another.
Suppose two similar cars are approaching. They collide, but the sled is equipped with a magnetic clutch so that when they collide they combine into a single agglomerate. This type of collision is completely inelastic as the maximum possible kinetic energy is lost. This does not mean that the final kinetic energy of the system is necessarily zero. Momentum is not yet maintained.
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a he-ne laser emits wavelength of 633 nm. its beam diameter is 1 mm. find the minimum angular spread due to diffraction.
The minimum angular spread due to diffraction is 633×10⁻⁹m.
What is diffraction-induced spread?The spread of the spot (obtained on the opposite wall of the camera) is thought to equal the total of its geometrical spread and the spread caused by diffraction when the hole is lit by a parallel beam of light with wavelength lambda.
When waves flow through an aperture or around objects, they spread out, which is referred to as diffraction. It happens when the wavelength of the incident wave and the size of the aperture or obstruction are on the same order of magnitude. The majority of the wave is blocked at extremely small aperture diameters.
Minimum angular spread due to diffraction (θ) = λ/b
Given.
Wavelength = 633nm = 633×10⁻⁹m
Beam diameter is 1mm.
Minimum angular spread due to diffraction (θ) = 633×10⁻⁹m/1
Minimum angular spread due to diffraction (θ) = 633×10⁻⁹m.
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