556 nm is the wavelength of radiation that has a frequency of 5.39 × 10⁻¹⁴ s⁻¹.
What is radiation?The energy that emanates from a source and moves through space at the speed of light is referred to as radiation. This energy has wave-like qualities and is accompanied by an electric field and a magnetic field.
Examples include solar heat or light, microwaves from an oven, X-rays from an X-ray tube, and gamma rays from radioactive materials. Atoms can be ionized, or removed from their electrons, by ionizing radiation.
Given that:
frequency (f) = 5.39 × 10⁻¹⁴ s⁻¹
Velocity of light (c) = 2.9979 × 10⁸ m/s
As we know,
λ = c/f
or, λ =(2.9979 × 10⁸ m/s)/(5.39 × 10⁻¹⁴ s⁻¹)
or, λ = 5.56 × 10⁻⁷m
or, λ = 556 nm
Thus, the wavelength = 5.56 × 10⁻⁷m or 556 nm.
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Alpha Centauri has a parallax angle of 0.7420", calculate its distance in parsecs and in light-years.
The distance for α Centauri in light-years is 4.35
Proxima Centauri is the closest star to the Sun and is part of the Alpha Centauri star system, located 4.24 light-years away from Earth in the constellation Centaurus. Alpha Centauri A and Alpha Centauri B are the primary components of the Alpha Centauri star system, located 4.37 light-years away from Earth. Alpha Centauri A is slightly brighter than the Sun, while Alpha Centauri B is slightly dimmer.
The parallax angle of α Centauri is 0.7420".To calculate the distance in parsecs and light-years, we need to use the formula:
Distance (in parsecs) = 1 / parallax angle (in arcseconds)
Therefore, the distance for α Centauri in parsecs is:
Distance (in parsecs) = 1 / 0.7420" = 1.34 parsecs
To calculate the distance in light-years, we need to use the formula:
Distance (in light-years) = Distance (in parsecs) × 3.26
Therefore, the distance for α Centauri in light-years is:
Distance (in light-years) = 1.34 parsecs × 3.26 = 4.35 light-years
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how strong is the electric field between two parallel plates 6.8 mm apart if the potential difference between them is 220 v?
That amounts battery to 220 volts divided by 6.8 times 10 and three less meters between them. That is 6.8 millimeters electric 3.2 times 10 to the four Newtons per Coulomb gives us 32,352 Newtons per Coulomb.
A battery is a device that converts chemical energy into electrical energy by storing it. During chemical reactions in batteries, electrons flow from one material (electrode) to another through an external circuit. The movement of electrons results in an effective electric current.
Electric field due to battery = potential/separation = 220v / 6.8mm = 220v / 0.0068m = 32,352 volts per meter, according to the question.
If there is a battery, two parallel plates spaced 6.8 mm apart will create an electric field.
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Is polarization a property of all electromagnetic waves, or is it unique to visible light? Can sound waves be polarized? What fundamental distinction in wave properties is involved? Explain.
Yes, all electromagnetic waves have polarization as a characteristic. The primary difference in wave qualities involved in polarization of sound waves is amplitude.
Amplitude, The amplitude of the wave is the largest deviation of the wave from the mean position. It is the maximum height between the Center line and the Peak or Valley. There are waves in plane polarized light, and they all vibrate in the same direction. As the wave travels, the electric of a vector in circular polarization rotates about the direction of propagation. Reflection or travelling through filters, like particular crystals, can both cause light to become polarized.
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the graph on the next page shows the displacement of the block as a function of time
Answer:
brokies+99+00+00=00
Explanation:
Correctly label the following anatomical features of the neuroglia. Ependymal cell Astrocyte Myelinated axon Neurons Microglia Capillary Oligodendrocyte wa
Neuroglia: Nervous system composed of two types of cells. A cell that generates and propagates action potential is called neuron and other types of cells that protect and nourishes the neurons called neuroglia. In the CNS there are four types of neuroglia cells.
Astrocytes: Look like star and found in more number. It is the largest glial cells in th CNS and it give strength and support to the neurons
Oligodendrocytes: It is smaller but look like astrocytes and it is responsible for the formation of myeline sheath. Axons that are covered with myeline sheath is called myelinated axon
Microglia: Small cells with number of spine like projections. Its function is phaogocytosis, engulf the bacteria
Ependymal cells: Epithelial cells with villi and cilia and it for blood cerebrospinal fluid barrier.
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Which of the following is the process of making a new product to be sold by a business or enterprise to its customers? a.product analysis
b.product conceptualization
c.product development
d.product implementation
Answer: option (c)
Explanation:
Product development is also known as new product operation.
The main ideal is to satisfy the consumer demand.
There are some stages of product development process. They're idea generation, webbing, conception development and testing, request strategy, developing the new product, request testing, request commercialization.
The process of developing a product is managed by product inventor.
Product development can be done in two ways, the new product is introduced or the being products can be bettered according to the client satisfaction.
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if column a gets heated what happens to the ball
Answer:-A metal ball is made up of atoms having minimum interatomic distance, so when we heat the metal its atoms actually vibrate about their mean position and thus colliding with neighboring atoms and making them to vibrate, due to this continuation process metals size increases or metal expands on heating.
When heat is added to a substance, the molecules and atoms vibrate faster. As atoms vibrate faster, the space between atoms increases. The motion and spacing of the particles determines the state of matter of the substance. The end result of increased molecular motion is that the object expands and takes up more space “Steel will expand from 0.06 percent to 0.07 percent in length for each 100oF rise in temperature. The expansion rate increases as the temperature rises. Heated to 1,000oF, a steel member will expand 9½ inches over 100 feet of length When a metal ring is heated both inner and outer radii increase. This can be understood better by visualizing that the ring in reality is a rod bent into a circle. That rod will expand upon heating. The same bar bent into a ring thus also expands.
what is the strength of an electric field that a 0.010 c negative charge experiences 0.90 mm from a 0.20 c positive charge?
The strength of an electric field that a 0.010 C negative charge experiences 0.90 mm from a 0.20 C positive charge is 2.22* 10¹⁷ N/C.
Given that,
Value is positive charge = 0.2 C
Distance of positive charge from 0.01 C negative charge is,
x₀ = 0.09 mm = 0.09 * 10⁻³ m
The expression for the strength of electric field that a 0.010 C negative charge experience from positive charge is,
E₀ = (k* Qₐ)/x₀² = (9* 10⁹* 0.2)/(0.09 * 10⁻³)² = 2.22* 10¹⁷ N/C
Thus, the strength of electric field that a 0.010 C negative charge experience form positive charge is 2.22* 10¹⁷ N/C.
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Light rays from the sun make a 300 angle to the vertical when seen from below the surface of a body of water. At what angle above the horizon is the sun? The indices of refraction of glass, water, and air are 1.50, 1.333, and 1.000293, respectively.
The light rays from the sun is making an angle of 30° then the angle above the horizon of the sun is 48.32°.
What is an angle?When two lines converge at a point, they produce an angle. The word "angle" refers to the length of the "gap" between these two rays. The symbol is used to denote it.
Radians, a unit of roundness or rotation, and degrees are the 2 most common units used to measure angles. In daily life, angles are present.
As per the information given in the question,
Use the equation of snell's law,
(sin i)/(sin r) = n₂/n₁
r = sin⁻¹ (n₁ sin i)/n₂
Put n₁ = 1.33 and n₂ = 1 also substitute i = 30°
r = sin⁻¹ (1.33) (sin 30)/1
r = sin⁻¹(0.665)
r = 41.68°
The formula for the angle above the horizon,
θ = 90° - r
θ = 90° - 41.68°
θ = 48.32°.
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the right edge of the circuit in the figure extends into a 50 mt uniform magnetic field.
The magnitude of the circuit is 2.5*10^-2. Since the circuit's right edge in the illustration extends into a 50 mt uniform magnetic field, Rightward is the direction of the magnetic force.
According to the left hand rule, the thumb of the left hand points in the direction of force when the middle finger and index finger point in the direction of current and magnetic field, respectively. The magnetic field and the downward direction are indicated by the way the current in this circuit flows, which is from top to bottom. The thumb points to the right if the index finger points into the page and the middle finger points downward. Thus, the direction of the magnetic force is towards right.
F = (5.0)(10)(50mT)(10^-3/1)(sin90)
F = 2.5*10^-2N
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The complete question is -
The Right Edge Of The Circuit In The Figure Extends Into A 50 MT Uniform Magnetic Field. What Are The Magnitude of the circuit.
6. a 5 kg cylinder with a 50 cm radius is attached to the wall by an axis through its center and set into motion with an angular speed of 5 rad/sec. a force f is then applied to the edge of the cylinder as shown. the cylinder completes 6 full rotations before coming to a stop. what is the value of the force f?
The value of force is 211N. Thus, the cylinder undergoes through 6 rotations with a force is 211N
How to calculate force of a cylinder?A cylinder of mass 5 kg and radius 50cm is rotating at angular speed of 5 rad/sec.
To find the force that must be applied tangentially to the cylinder to bring it to rest in 6 revolutions
Calculation :As per the given criteria
Rotation if the wheel = 5 rad/ sec
Now, total rev = 6
We know
0 = (10/6) ² - 2 lamda × 6
= 100/36=12 lamba
Lamda= 33.33 rev/sec
Lamda = 2π×33.33 rad/sec²
Now the moment of inertia
I=1/2mr²
=1/2 (0.5) ²× 5
=0.625 kgm²
Since the force F, now torque
F=F.r=0.62 F
Now, torque = I × lamda
= 0.625×33.33×2π
Or 0.62 F= 130.82
F= 211 N
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Can someone help with this
To solve this problem, you can use the equation for the conservation of energy, which states that the initial potential energy of the spring plus the work done by friction is equal to the final kinetic energy of the block.
The initial potential energy of the spring is given by 0.5kx1^2, where k is the force constant of the spring and x1 is the initial compression of the spring.
The work done by friction is equal to the force of friction times the distance over which it acts, which is given by µkmg*x1, where µk is the coefficient of kinetic friction, m is the mass of the block, g is the acceleration due to gravity, and x1 is the distance the block moves before coming to rest.
The final kinetic energy of the block is given by 0.5mv^2, where m is the mass of the block and v is the final velocity of the block.
You can set up the equation as follows:
0.5kx1^2 + µkmgx1 = 0.5m*v^2
Substituting the given values, we have:
0.5400.3^2 + µk29.810.3 = 0.52*v^2
Solving for µk, we find that:
µk = (0.5400.3^2 - 0.52v^2)/(29.810.3)
The maximum extension x2 of the spring is equal to the distance the block travels, so we can substitute x2 for v:
µk = (0.5400.3^2 - 0.52x2^2)/(29.810.3)
Substituting the value of x2, we find that:
µk = (0.5400.3^2 - 0.520.2^2)/(29.810.3)
Simplifying, we find that:
µk = 0.2
Therefore, the answer is 0.2, letter B.
Help me in this question it is science
Answer:
13=c
14=a
other question=d
13. What authority enforces the requirements set by the NEC? 14. Does the NEC provide minimum or maximum standards? 15. What do the letters "UL" signify? 16. What section of the NEC states that all listed or labeled equipment shall be installed or used in accordance with any instructions included in the listing or labeling? 17. When the word "shall" appears in a NEC reference, it means that it (must)(may) be done. (Underline the correct word.) 18. What is the purpose of the NEC?
Electrical inspector authority enforces the requirements set by the NEC.
The NEC specifies the minimum requirements for secure electrical installations.
The letters "UL" signify an electrical product satisfies the safety requirements of Underwriters Laboratories
Section 110.3 (B) Installation and Use of OSHA and NEC 1999. Equipment that is listed or labelled must be installed and used in accordance with any guidelines mentioned in the listing or labelling.
the word "shall" appears in a NEC reference, it means that it (must)(may) be done.
"The goal of this Code is the practical safeguarding of persons and property from hazards deriving from the usage of electricity," the NEC reads in 90.1(A). *
A collection of guidelines for the secure installation of electrical wiring in the US called the National Electrical Code (NEC) is revised on a regular basis. The NEC has been modified three times since it was first published in 1897.
In order to avoid fires and other electrical catastrophes, the NEC offers recommendations for electrical installation. For installations to be secure, legitimate, and compliant, electricians and contractors must be knowledgeable of the NEC when applicable. The National Fire Protection Organization, a private commercial association, is responsible for maintaining the codes.
The National Electrical Code (NEC) is a national designation, but it is not a federal statute. Local government either adopts NEC standards or writes and enforces its own electrical code in place of this.
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In 1966, a special research cannon built in Arizona shot a projectile to a height of 180 kmabove Earth’s surface. The potential energy associated with the projectile when its altitude was10 percentof the maximum height was14.8 MJ.What was the projectile’s mass?
a. 10.2 kg
b. 28.8kg
c. 9.70kg
d. 34.9kg
Answer:
b
Explanation:
28.8" (and any words after it) was ignored because we have restricted queries to 32 words.
When a wave is reflected on a plane, the
angle of incidence is which of the following?
The angle between the incoming light
and the normal
The angle between the outgoing light and
the plane
The angle between the outgoing light and
the normal
/ 1
The angle between the incoming light
and the plane
Answer:
1
Explanation:
Answer:
The angle between the incoming light
and the normal
what is the average efficiency of an electric motor, compared to the 35 percent efficiency of an internal combustion engine
The direct answer to your question is that electric engines can be more than 80% efficient and even up to 90% efficient while combustion engines are 30 to 45% efficient.
Electric motors make vehicles substantially more efficient than internal combustion engines. Electric motors convert over 85 percent of electrical energy into mechanical energy, or motion, compared to less than 30 to 40 percent for a gas combustion engine.
These efficiencies are even lower after considering losses as heat in the drivetrain, which is the collection of components that translate the power created in an electric motor or combustion engine.
• Motor efficiency: 85..90%
• Battery load efficiency: 80..90 %
• Battery discharge efficiency: 80..90 %
• Power generation efficiency at power: 30..40 %
• Transfer efficiency from the powerplant to the reloading station: 90..95 %
• Energy conversion efficiency AC to DC: 90..95 %
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Help please I need help fassttttt
The distance -time graph of object D shows a linear relationship. Thus it moves with a constant speed. Whereas, object C shows a non-linear relation of distance and time thus, it moves with a changing speed.
What is velocity?Velocity is a physical quantity that measures the distance covered per unit time. Velocity is a vector quantity and is having both magnitude and direction.
Velocity is the ratio of distance to the time. Thus, if the change in distance is linear with the change in time, there will be no change in velocity and the object is said to be moving with constant velocity.
If the distance and time are non-linear thus, thus, change in distance is not coinciding with change in time, then the velocity changes each time.
Therefore, object C has a changing speed and object D has a constant speed.
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a grinding wheel 0.35 m in diameter rotates at 2200 rpm. calculate its angular velocity in rad/s. (b) what are the linear speed and acceleration of a point on the edge of the grinding wheel?]
There is a 230 radian per second angular velocity.
40.25 m/s is the linear speed.
Speed and acceleration at an angle:Given that the wheel has a 0.35 m diameter.
as a result, radius D/2
Because one revolution equals one radian.
Thus, an is equal to the product of the velocity change and the time change. a = (w2w1)/(t2t1) a = (w 2w1)/(t2t1).
230 radians per second are hence the angular velocity.
a=v^{2} \r\s(40.25)/0.175\s9257.5
How is angular velocity determined?In uniform circular motion, the angular velocity (w), which is a vector quantity, is determined by dividing the angular displacement (), another vector number, by the change in time (t). The arc length traveled (S) divided by the shift in time (t) is the definition of speed.
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magnetic fields are produced by particles that are particles * 1 point a) moving and charged b) moving and neutral c) stationary and charged d) stationary and neutral
The movement and charge of particles causes them to form magnetic fields.
A magnetic field is created by what particles?Moving electric charges generate magnetic fields. Everything is constructed of atoms, and each atom has an orbiting nucleus that is composed of protons and neutrons. A weak magnetic field is produced around each atom because the orbiting electrons are tiny moving charges.
What produces a magnetic field and why?The movement of electric charges is what generates magnetism. Atoms are little building blocks that make up all substances. Each atom contains electrons, which are little particles with electric charges. The electrons around the nucleus, or core, of an atom spin like tops.
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a sonar echo returns to a submarine 1.65 s after being emitted. what is the distance to the object creating the echo? (assume that the submarine is in the ocean, not in fresh water.)
The distance to the object creating the echo is 2,454.6 meters.
Assuming the submarine is in saltwater, the speed of sound in seawater is approximately 1,484 meters per second.
The distance to the object creating the echo can be calculated by multiplying the speed of sound by the time it took for the echo to return to the submarine:
Distance = Speed x Time
Distance = 1,484 m/s x 1.65 s
Distance = 2,454.6 meters
Therefore, the distance to the object creating the echo is 2,454.6 meters.
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a jet of water flowing from a hose at 12 m/s is directed against a wall. if the mass flow in the fluid stream is 2.0 kg/s, what force is the water applying to the wall if backsplash is negligible?
According to the question,
Using Newton`s 2nd law
Force = ∆momentum/time = ∆(mv)/t = (m/t)*∆v
Given m/t = 2.0kg/s
∆v = 12.0m/s (assuming final vel of water = 0)
F = 2.0kg/s x 12.0m/s
F = 24.0N
In physics, a force is a power that can change the motion of an item. A force can purpose an object with mass to alternate its pace. Pressure also can be described intuitively as a push or a pull.
A pressure is a push or a pull and it affects our each day lives because without force, people might not be capable of open and near stuff or lift up our arms or legs.
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Explain why wind power can be tracked back to sunlight
Answer:
wind power can be tracked back to sunlight since sunlight is one of the causes of moving air which is wind .
High temperature causes air to expand causing it to spread over a wider area decreasing it's pressure compared to places of lower temperature which causes air to contract causing a concentration of air molecules which increases its pressure . This two processes causes a pressure difference which leads to movement of air (wind) whose energy can be used to generate wind power.
a spotlight on the ground is shining on a wall 12m away. if a woman 2m tall walks from the spotlight toward the building at a speed of 0.8m/s, how fast is the length of her shadow on the building decreasing when she is 2m from the building?
0.133 m/sec speed is the length of her shadow on the building decreasing when she is 2m from the building
What is speed?The quantity of anything that happens or changes in a unit of time is referred to as its rate. You can determine an object's speed if you know how far it moves in a specific length of time. The distance an object travels in a given amount of time is its speed.
Let, x be the distance of the women from the spotlight.
s be the length of the woman on wall / building
these two variables changes when time changes.
Now, consider a triangle,
tan θ = 2/x
tan θ = s/12
As the θ is same, so
or, 2/x = s/12
or, sx = 24
or, s = 24/x .......... (i)
Differentiating w.r.t "t"
or, ds/dt = -24/x² dx/dt .......... (ii)
we want rate of change of length of shadow w.r.t time.
or, 12-x = 4
or, x = 8m
we know, dx/dt = (0.8) m/sec
Substitute this in equation (ii)
ds/dt = [(-24) /(12)²] × (0.8)
ds/dt = - 0.133 m/sec
At rate - 0.133 m/sec, the length of shadow of women on the building decreasing when she is 2 m from the building.
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I need help please help
Answer:
29 Joules
Explanation:
58N * 0.5m =
58 * 0.5 =
58 * 5/10 =
290/10 = 29 Joules
exitance is defined as the power per unit area that is emitted from the surface of an object. for a blackbody radiator, the exitance emitted is dependent upon its temperature. calculate the exitance in w/cm2 for a blackbody radiator at 46 k and 335 k. exitance at 46 k
The exitance in W/cm² for a blackbody radiator at 335 K is 232 W/cm².
The exitance of a blackbody radiator is given by the Stefan-Boltzmann law: exitance = sigma × [tex]T^4[/tex]
where exitance is the power per unit area emitted from the surface of the object, sigma is the Stefan-Boltzmann constant (5.67 x [tex]10^{-8}[/tex] W/m² K^4), and T is the temperature of the blackbody radiator in Kelvin.
To calculate the exitance in W/cm² for a blackbody radiator at 46 K, we can substitute this temperature into the equation:
exitance = 5.67 x [tex]10^{-8}[/tex] W/m² [tex]K^4[/tex] × [tex](46 K)^4[/tex] = 0.000715 W/m²
Converting this to W/cm², we get:
exitance (W/cm²) = 0.000715 W/m² × (100 cm/m)² = 0.0715 W/cm²
To calculate the exitance in W/cm² for a blackbody radiator at 335 K, we can substitute this temperature into the equation:
exitance = 5.67 x [tex]10^{-8}[/tex] W/m² [tex]K^4[/tex] × [tex](335 K)^4[/tex] = 2.32 W/m²
Converting this to W/cm², we get:
exitance (W/cm²) = 2.32 W/m² × (100 cm/m)² = 232 W/cm²
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the light passing through the grating slits seems to be creating patterns of bright and dark fringes. in terms of light in the real world, what is happening to create the fringes?
When a light passes through a grating, it split the light to multiple light of different wavelength and which we can see as fringes. It is essentially separate the wavelength of incoming light.
Whilst light goes through a slit, diffraction reasons it to bend and unfold across the display, creating a predictable banded pattern. whilst mild is going thru two slits, new darkish regions seem. The dark and mild areas are produced with the aid of interference of the mild passing via the slits.
White mild can be separated into all seven most important hues of the entire spectrum or rainbow by using a diffraction grating or a prism. The diffraction grating separates mild into colors because the mild passes through the numerous exceptional slits of the grating. this is a transmission grating.
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____a form of energy caused by the movement of molecules from warmer substances or objects to cooler ones. a. Conductor
b. Convection
c. Conduction
d. Heat
The right answer is D. Heat is a type of energy that results from molecules moving from warmer kinds of particles to cooler ones.
Why is energy so crucial?Computers, vehicles, communications, state-of-the-art medical technology, and many other things are all powered by energy. The demand for dependable and economical energy is especially pressing for emerging countries. It might even save a person's life.
How does energy originate?When electrons transfer by one atom to another, energy is produced. Heat and light are other examples of energy. It is also possible to convert one type of energy into another. Chemical energy that has been stored converts to electric energy using a battery.
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three identical, small cork spheres are released from rest in a uniform electric field directed downward toward the floor. sphere x is uncharged, but spheres y and z are charged. sphere z remains suspended in the field. spheres x and y fall downward, but sphere x takes a longer time to reach the floor. what are the signs of the charges on spheres y and z ?
Sphere Y will have a negative and Z have a positive sign. The sign of charge q2 will be negative.
When the spheres are separated and the balloon is removed, the two spheres show an electrical charge. The left sphere ends with a positive charge. The sphere on the right ends with a negative charge. When two conductive balls touch together.
It is as if they become one excellent conductor and the combined charge of the two spheres spreads over the surfaces of the contacting spheres. If you release the spheres again, each will still have half the original total charge. The charge is then spread evenly over the surface of the sphere.
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if this 1500 kg car is driven at 27 m/s through the bottom of a circular dip in the road that has a radius of 600 m , by how much do these springs compress compared to when the car is driven on a flat roa
The springs compress by an extra 12% when driven through the bottom of a circular dip compared to being driven on a flat road.
On a flat road, the springs just support the car's weight.
The weight of the car = force on the springs
And from Hooke's law, F = kx
On a flat road,
k x = mg
x(flat) = 1500 × 9.8/k = 12740/k
Through the bottom of the circular dip, the springs not only balance the weight of the car, they also balance the force that keeps it in circular motion.
kx = (mv²/r) + mg
kx = (1300 × 27²/600) + (1500×9.8) = 14319.5N
x(circular dip) = 14319.5/k
If the value of the springs' spring-constant is available, we'd get straight values for This, but in their absence,
x(circular dip)/x(flat road) = 14319.5/12740 = 1.12
The springs compress by an extra 12% when driven through the bottom of a circular dip compared to being driven on a flat road.
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