A wave travels with a speed of 78m/s in air and it has a frequency of 42hz. What is the wavelength of this wave?

Answer:

0.9 m

Explanation:

Hooke’s Law

\(\large\boxed{F = ke}\)

where:

Given values:

Substitute the given values into the formula to find k:

\(\implies 2.0=0.30k\)

\(\implies k=\dfrac{2.0}{0.30}\)

\(\implies k=\dfrac{20}{3}\; \sf N/m\)

To find the extension if the force applied is 6 N, substitute the found value of k and the given value of F into the formula and solve for e:

\(\implies 6=\dfrac{20}{3}e\)

\(\implies 18=20e\)

\(\implies e=\dfrac{18}{20}\)

\(\implies e=0.9\; \sf m\)

The moon of Jupiter most similar in size to Earth's moon is Ganymede. Ganymede is the largest moon of Jupiter and also the largest moon in our solar system. Its diameter is only slightly larger than that of Earth's moon.

The Ganymede is the most similar in size to Earth's moon is due to their similar origins. Both moons are believed to have formed through a process called accretion, where smaller pieces of debris come together to form a larger object.

Additionally, both moons have similar compositions, consisting mainly of rock and ice.
While Europa, Io, and Callisto are also moons of Jupiter, Ganymede is the moon most similar in size to Earth's moon. Their similar origins and compositions make them interesting objects to study in our solar system.

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The energy of the photon emitted with the given stiffness is  1.14 × 10⁻²⁰ Joules  .

In the question ,

it is given that ,

the stiffness(k) is = 24 .

the mass of the photon(m) is = 5.1 × 10⁻²⁶ Kg .

we know that , k = m*ω²

Substituting the values ,

we get ,

24 = (5.1 × 10⁻²⁶)*ω²

Simplifying further ,

we get ,

ω = 2.1693 × 10¹³ rad/sec .

the formula for the energy of the photon is given as

Eₙ = hω(n + 1/2)   ...where h(planks constant) = 6.63 × 10⁻³⁴

the energy of photon when it is dropped from energy level 9 to energy level 4 is given by :

E₉ - E₄ = hω(9 + 1/2 - 4 - 1/2)

= hω(5)

Converting the value of ω , and substituting it in the equation ,

we get ,

= 5/2π × (6.63 × 10⁻³⁴) × (2.1693 × 10¹³)

On simplifying the above equation further ,

we get ,

= 1.14 × 10⁻²⁰ Joules .

Therefore , the energy of the photon is 1.14 × 10⁻²⁰ Joules  .

The given question is incomplete , the complete question is

What is the energy of the photon emitted by a harmonic oscillator with stiffness 24 N/m and mass 5.1 × 10⁻²⁶ Kg when it drops from energy level 9 to energy level 4 ?

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Answer:

in the beginning the kinetic energy is at a maximum level because the starting velocity is high comparatively.. and because of the gravitational acceleration acting on the ball in the opposite direction the kinetic energy drops proportionally because of the velocity drop. after the ball reaches it's maximum height the potential energy of the ball is high because of the height.. and again the kinetic energy starts to build because the ball again starts to fall down..

Explanation:

Hope this was helpful

Answer:

No. of Cars = 8

Explanation:

In order to find the no. of buses that can be cleared by the daredevil, we first need to find the distance he will cover during its motion. Since, the motion is projectile, therefore, the horizontal distance will be equal to range of the projectile:

R = V² Sin 2θ/g

where,

R = Range = ?

V = launch speed = 43 m/s

θ = angle with horizontal = 30°

g = 9.8 m/s²

Therefore,

R = (43 m/s)² Sin 60°/(9.8 m/s²)

R = 163.4 m

Now, for the number of cars cleared, we use the following formula:

No. of Cars = R/Length of single bus

No. of Cars = 163.4 m/20 m

No. of Cars = 8.17

No. of Cars = 8

The individual standing at the edge is moving at an angle of 0.42 rad/s. Since the distance from the center of the merry-go-round is zero, the person's moment of inertia is zero at its center.

Velocity seems to be the velocity & directions of an item's passage, where speed is the forecasting at which an element is travelling along a route. To put it another way, velocity is a vector, whereas speed is a scalar value.

Simply said, velocity is the rate of movement in a certain direction. such as the speed of a car driving north on a highway or the pace at which a rocket takes off.

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Strength training exercises are physical activities that aim to increase muscle strength and endurance through resistance training. Some examples of strength training exercises include:

Squats: a compound exercise that works multiple muscle groups including the quadriceps, hamstrings, glutes, and lower back. The individual squats down, then stands back up, using their body weight or added weight for resistance.

Deadlifts: another compound exercise that targets multiple muscle groups including the hamstrings, glutes, back, and traps. The individual lifts a weight from the ground to a standing position, using proper form to avoid injury.

Two health benefits of strength training include:

Improved Physical Function: Strength training can help improve physical function, and increase muscle mass and bone density, which can reduce the risk of injury and improve balance and coordination.

Better Metabolic Health: Strength training can increase muscle mass, leading to increased metabolism, which can result in weight loss and improved insulin sensitivity, reducing the risk of type 2 diabetes and other metabolic disorders.

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Answer:

T = 486.6 K

Explanation:

The final temperature of the block can be found using the following formula:

\(Q = mC\Delta T\\\)

where,

Q = Thermal Energy Transferred = 3.35 x 10⁵ J

m = mass of aluminum block = 2 kg

C = Specific Heat = 897 J/kg.K

ΔT = Change in Temperature = T - 300 K

T = Final Temperature of the Block = ?

Therefore,

\(3.35\ x\ 10^5\ J = (2\ kg)(897\ J/kg.K)(T-300\ K)\\\\5.38\ x\ 10^5\ J + 3.35\ x\ 10^5\ J = (1794 J/K)(T)\\\\T = \frac{8.73\ x\ 10^5\ J}{1794\ J/K}\)

T = 486.6 K

In relation to line locators, conductive refers to a direct connection between the pipe and transmitter. Conductive locating involves connecting a transmitter to a metallic pipe or cable and then using a receiver to detect the signal transmitted through the pipe or cable.

The transmitter sends an electrical signal through the conductive material, which is then picked up by the receiver. This technique is particularly useful when locating pipes or cables that are buried underground or hidden behind walls. By using conductive locating, line locators can accurately determine the location, depth, and direction of the pipe or cable. In contrast, an indirect connection with radio waves, as in option B, is referred to as inductive locating, which involves detecting the electromagnetic field around the pipe or cable. While inductive locating can be useful in some situations, such as locating non-conductive pipes or cables, it is less accurate than conductive locating. Overall, conductive locating is a key technique used by line locators to accurately and efficiently locate buried or hidden pipes and cables.

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Barometric pressure of 1000 mb is considered average. A pressure above 1013 mb is high, indicating fair weather, while a pressure below 1000 mb is low, indicating stormy weather.

Barometric pressure refers to the pressure exerted by the atmosphere on a particular area. It is commonly measured in millibars (mb). Generally, a barometric pressure of 1000 mb is considered average or normal.

High barometric pressure, also known as a high-pressure system, is typically above 1013 mb. It is associated with clear skies, stable weather conditions, and cooler temperatures. High pressure often brings fair weather and calm winds.

On the other hand, low barometric pressure, also known as a low-pressure system, is typically below 1000 mb. It is associated with cloudy or stormy weather, as well as higher temperatures. Low pressure systems often bring precipitation, strong winds, and potentially severe weather conditions.

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Answer:

A string vibrates with a particular fundamental frequency. It is possible, however, to produce pitches with different frequencies from the same string. ... When the length of a string is changed, it will vibrate with a different frequency. Shorter strings have higher frequency and therefore higher pitch.

The closest you can be to speaker B and be at a point of perfectly destructive interference- 1.008m.

The wavelength of sound emitted by speakers

= velocity / frequency

= 344 / 172

= 2 m

For destructive interference , path difference is equal to odd multiple of  half the wavelength .

path difference = 2 / 2 = 1 m

d₂ - d₁ = 1 m

d₂ = d₁ + 1 m

d₂ = .008 m + 1

 d₂ = 1.008 m

So, the closest you can be to speaker B and be at a point of perfectly destructive interference- 1.008m.

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The complete question is:

Two loudspeakers, A and B, are driven by the same amplifier and emit sinusoidal waves in phase. The frequency of the waves emitted by each speaker is 172 HzHz. You are 8.00 mm from speaker A. Take the speed of sound in air to be 344 m/sm/s. What is the closest you can be to speaker B and be at a point of perfectly destructive interference?

No,light from the sun cannot cause the paper to change color.Light can only change things by warming them up , so it cannot cause the paper to change colour.

Light or apparent light is electromagnetic radiation that can be seen by the human eye.[1] Noticeable light is generally characterized as having frequencies in the scope of 400-700 nanometres (nm), relating to frequencies of 750-420 terahertz, between the infrared (with longer frequencies) and the bright (with more limited wavelengths).[2][3]

In physical science, the expression "light" may allude all the more comprehensively to electromagnetic radiation of any frequency, whether noticeable or not.[4][5] In this sense, gamma beams, X-beams, microwaves and radio waves are likewise light. The essential properties of light are power, proliferation bearing, recurrence or frequency range and polarization. Its speed in vacuum, 299792458 m/s, is one of the basic constants of nature.[6] Like a wide range of electromagnetic radiation, noticeable light proliferates by massless rudimentary particles called photons that addresses the quanta of electromagnetic field, and can be broke down as the two waves and particles. The investigation of light, known as optics, is a significant exploration region in present day material science.

Hence,answer is no.

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The combination of higher mass and lower elasticity in a bowling ball results in a more painful experience when compared to kicking a soccer ball.

Kicking a bowling ball is more painful than kicking a soccer ball because of the differences in their masses and elasticity. The pain experienced when kicking an object is determined by the transfer of kinetic energy and the interaction between the object and the body.

A bowling ball is much heavier and has a higher mass compared to a soccer ball. When you kick a bowling ball, it has a greater amount of momentum, which is the product of mass and velocity. The higher momentum results in a greater force being exerted on your foot upon impact, leading to a higher level of discomfort or pain.

In addition, the elasticity of the objects plays a role. Soccer balls are designed to be more elastic, allowing them to absorb and distribute the impact force more effectively. This elasticity helps to reduce the amount of force transmitted back to your foot, resulting in less pain. On the other hand, bowling balls are typically less elastic, leading to a greater transfer of force and more discomfort when kicked.

Overall, the combination of higher mass and lower elasticity in a bowling ball results in a more painful experience when compared to kicking a soccer ball.

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Answer:

time graph reveals pertinent information about an object's velocity. For example, a small slope means a small velocity; a negative slope means a negative velocity; a constant slope (straight line) means a constant velocity; a changing slope (curved line) means a changing velocity.

Answer:

the answer is in the pic below :)

Explanation:

The given statement "properly conducting electricity so that its signal can travel unimpeded from one node on a network to another" is False.

The statement refers to the concept of transmitting data on a computer network, rather than conducting electricity.

The proper term for the process described is "network transmission," which involves ensuring that signals can travel unimpeded from one node to another on a network.

Conducting electricity refers to the movement of electric charges through a material, such as a wire, to create an electrical current. While network transmission may involve the use of electrical signals, it is distinct from the process of conducting electricity.

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The absorption of energy occurs in endothermic reactions. The correct option is D.

The type of chemical reaction that results in the absorption of energy is endothermic. In an endothermic reaction, energy is absorbed from the surroundings, resulting in an increase in the internal energy of the system.

This means that the products of the reaction have more energy than the reactants, and the reaction requires an input of energy to proceed.

Examples of endothermic reactions include the reaction of baking soda and vinegar, the melting of ice, and the reaction of ammonium nitrate and water.

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Answer:

v = 14.5 m/s

Explanation:

The Principle Of Conservation Of Mechanical Energy

In the absence of friction, the total mechanical energy is conserved. That means that

Em=U+K is constant, being U the potential energy and K the kinetic energy

U=mgh

\(\displaystyle K=\frac{mv^2}{2}\)

The ball with a mass of m=0.8 kg is thrown straight upward from the zero height reference (h=0) and with some speed (v). The potential energy is zero, but the kinetic speed is given by the equation above.

When the ball reaches its maximum height of h=10.7 m, the speed is zero and all the initial kinetic energy was transformed into potential energy, thus:

\(\displaystyle \frac{mv^2}{2}=mgh\)

Simplifying by m:

\(\displaystyle \frac{v^2}{2}=gh\)

Solving for v:

\(\displaystyle v=\sqrt{2gh}\)

Substituting:

\(\displaystyle v=\sqrt{2*9.8*10.7}\)

Calculating:

v = 14.5 m/s

Answer:

The force of gravitational attraction between the satellite and Earth is \(2.587\times 10^{10}\) newtons.

Explanation:

Statement is incorrect. Correct statement is:

A satellite (\(m = 4.44\times 10^{9}\,kg\)) travels in orbit around the Earth at a distance of \(1.9\times 10^{6}\,m\) above Earth's surface. What is the force of gravitational attraction between the satellite and Earth?

The gravitational force experimented by the satellite (\(F\)), in newtons, is calculated by Newton's Law of Gravitation, whose equation is defined by following formula:

\(F = \frac{G\cdot m \cdot M}{R^{2}}\) (1)

Where:

\(G\) - Gravitational constant, in cubic meters per kilogram-square second.

\(m\) - Mass of the satellite, in kilograms.

\(M\) - Mass of the Earth, in kilograms.

\(R\) - Distance of the satellite with respect to the center of the Earth, measured in meters.

If we know that \(G = 6.674\times 10^{-11}\,\frac{m^{3}}{kg\cdot s^{2}}\), \(m = 4.44\times 10^{9}\,kg\), \(M = 5.972\times 10^{24}\,kg\) and \(R = 8.271\times 10^{6}\,m\), then the force of gravitational attraction between the satellite and Earth is:

\(F = 2.587\times 10^{10}\,N\)

The force of gravitational attraction between the satellite and Earth is \(2.587\times 10^{10}\) newtons.

At time t, the ring experiences a magnetic force due to the interaction of the magnetic field with the current induced in the ring by Faraday's law of induction.

A magnetic field is a region of space where a magnetic force is present. A magnetic force is a force that acts on objects that have a magnetic field. This force can be felt when magnets are brought near each other, as the magnetic fields interact with each other. Magnetic fields are created by moving electric charges, and are found around electric motors, generators, wires, and magnets.

The force is directed to the left, perpendicular to the plane of the ring, and is equal to B x aI, where B is the magnitude of the magnetic field, a is the area of the ring, and I is the induced current. The induced current is equal to -(dΦ/dt)R, where Φ is the magnetic flux through the ring and R is the resistance of the ring. Therefore, the resultant force on the ring at time t is equal to B x a(-dΦ/dt)R.

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Answer:

C

Explanation:

C should be the right answer

The statement that is correct is that all the carbon atoms in the glucose would end up in the palmitic acid. Option C.

In science a model is used for the purpose of explanation. The model could be used to describe what is going on in the reaction system. We can see from the model that there is a combination of the molecule of glucose with the molecule of oxygen in the molecule.

Now, we can see that the bonds in the glucose that are carbon to carbon bonds are broken and then recombined in such a way that they now lead to the formation of the palmitic acid molecule.

By the law of the conservation of mass, the number of atoms of the reactant is equal to the number of atoms in the product. This would play out as we carry out an atom count of the reactants and the products.

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Answer:

Im not smart

Explanation:

but im your bff

Answer:

it explain how everythings work you should work with the speed of light multiply with the distance of the equator

In corrosion fatigue is: "d) the surface remains bright after fracture."

Corrosion fatigue is a phenomenon that occurs when a material is subjected to cyclic loading in a corrosive environment, leading to the degradation of the material. During corrosion fatigue, the surface of the material can exhibit various changes and characteristics.

Option d) states that "the surface remains bright after fracture." This statement is incorrect. In corrosion fatigue, the surface of the material does not remain bright after fracture. Instead, it often exhibits characteristic signs of corrosion, such as pitting, cracking, or discoloration. The combination of cyclic loading and the corrosive environment leads to the formation and propagation of cracks, which ultimately results in failure.

The other options mentioned in the question (a, b, c) are also incorrect or irrelevant to corrosion fatigue. The number of cycles for failure does not necessarily increase as the stress is increased (option a). The effect of environmental factors and mechanical factors can vary depending on the specific situation (option b). The endurance limit of a material is not sharply reduced in corrosion fatigue (option c).

Therefore, the correct statement is option - d.

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Answer:

f = 0.365 Hz

Explanation:

The angular velocity of a simple pendulum is

           w = \(\sqrt{g/L}\)

angular velocity and frequency are related

           w = 2π f

we substitute

           2π f = \(\sqrt{g/L}\)

Let's find the initial length of the pendulum

            L = \(\frac{g}{4\pi^2 } \ f_o\)

            L₀ = \(\frac{9.8}{4 \pi ^2} \ 0.4\)

            L₀ = 0.6206 m

Indicates that the length of the chord triples

             L = 3 L₀

             L = 3 0.6206

             L = 1.8618 m

let's find the frequency

             f = \(\frac{1}{2\pi } \ \sqrt{\frac{9.8}{1.8618} }\)

             f = 0.365 Hz

Answer:

the answer is a because I saw it in a syllabus

Answer:

just doing this so you can give brainliest to the other person

have a great day!

Explanation:

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Given terms :

As we know, Distance covered is equal to :

Hence, the direction of plane's velocity relative to the ground is at 34.08° with the East or 90 - 34.08 = 55.92° with the North. Thus, the correct option is D. Due East

The direction plane's velocity relative to the ground, The given data is: Airplane velocity relative to air = 150 km/h, Wind velocity = 125 km/h. Direction of wind velocity = East,

Using Pythagoras theorem, we can calculate the magnitude of the plane's velocity relative to the ground. Let Vp be the velocity of the plane relative to the ground and let theta be the angle between the velocity vector and the horizontal velocity vector (east).

Then the component of velocity of the plane in the East direction is given by

cos(theta) × Vp, and the component of velocity of the plane in the North direction is given by sin(theta) × Vp.

Using the given data and equation of relative velocity, the velocity of the plane with respect to the ground is:

Vp = √(150² + 125²) km/h

Vp= √(22500 + 15625) km/h

Vp= √(38125) km/h= 195.04 km/h.

So the speed of the airplane relative to the ground is 195.04 km/h.

We have to find out the direction plane's velocity relative to the ground. In order to find the direction of the plane's velocity relative to the ground, we have to find the angle of the plane's velocity relative to the East (horizontal) direction.

Using the components of velocity and taking the inverse tangent, we get:θ = tan⁻¹(sin⁻¹(125/195.04))= tan⁻¹(0.6414)= 34.08°

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Answer:

An air mass that is moving from the north pole toward the equator would be turned to the East because of the spinning of the earth on its axis

Explanation:

An air that is moving from the North pole toward the equator will be turned to the East (right) because of the spinning of the earth around its own axis.

The Coriolis Effect can be described as an apparent effect generated by a rotating frame of reference. The effect takes place when an object moving along a straight path can be viewed from a non-fixed frame of reference.

The moving frame of reference is the one in which the Earth rotates at a fixed speed.  The Coriolis effect creates wind patterns near the earth’s surface, that move to the east toward the equator and to the west toward the poles. These wind patterns are responsible for moving clouds around the globe and creating weather patterns.

Coriolis force can be described as a fictitious force resulting from the rotational movement of the earth. It only affects the wind direction and not the wind speed. The magnitude of Coriolis force can be calculated from the wind speed.

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