Waves Problem set *use units*
1.A tall, thin tree sways back and forth in the breeze with a frequency of 58.0 Hz. What is the period of the tree?

2.A periodic transverse wave that has a frequency of 24.9 Hz, travels along a string. The distance between the crest and the adjacent trough is 3.4 m. What is its wavelength?

3.What is the speed of a sound wave that has a frequency of 285 Hz and a wavelength of 1.5 m?

4.A person yells across a canyon and hears the echo 5.5 seconds later. If the speed of sound is 336.0 m/s, how far away is the other side of the canyon?

5.Radio station WKLB in Boston broadcasts at a frequency of 97.1 kHz. What is the wavelength of the radio waves emitted by WKLB? ( Radio waves travel at the speed of light 3x108 m/s) ps. no decimals

6. Water waves at a lake cross a distance of 7 m in 3.9 s. The period of oscillation is 3 s. What is the speed of the water waves?
7.Water waves at a lake cross a distance of 9 m in 2.9 s. The period of oscillation is 3.1 s. What is the wavelength of the water waves?

8.One pulse is generated every 0.84 s in a tank of water. What is the frequency of the pulses?

9. One pulse is generated every 0.95 s in a tank of water. What is the speed of propagation of the wave if the wavelength of the surface wave is 1.9 cm?

10.Dog whistles are inaudible to humans because dogs can hear at much higher frequencies than humans are capable of detecting. If a dog whistle has a wavelength of 2.3 x 10-3 m, what is the frequency of sound emitted? *Sound travels at 340 m/s.

11. What is the speed of sound in air that has a temperature of 29.2 o C?

12. What is the wavelength of sound in air that has a temperature of 7.9 o C has a frequency of 40.7 Hz?

Answer:

7.656 m/s

Explanation:

El sonido viaja a cierta velocidad y tiene una frecuencia y longitud de onda. La relación entre la velocidad del sonido (V), su frecuencia (f) y la longitud de onda (λ) es la misma que para todas las ondas, está dada por la ecuación:

V = fλ

pero f = 1/T

∴ V = λ/T

donde T es el período

Dado que:

período (T) es el tiempo necesario para subir y bajar = 3.2 s

La distancia entre dos crestas es la longitud de onda (λ) = 24.5 m

V =  λ/T = 24.5 / 3.2 = 7.656 m/s

V = 7.656 m/s

Answer:

1.7kg

Explanation:

The mass of each sphere is equal to 53027 Kg. Therefore, option (B) is correct.

According to Newton’s law of gravitation, in the universe, every particle attracts every other particle with a force.

The magnitude of the force is directly proportional to the multiplication of their masses,

\(F\) ∝ \(M_1M_2\)

The magnitude of force is inversely proportional to the square of the distance between their centers of objects,

F ∝ 1/r²

The overall force between two particles is equal to,

F = G ×(M₁M₂/r²)

Given, the force between two spheres, F = 3 N

The distances between the centers of the spheres, r = 30 cm

The universal gravitational constant, G = 6.67 × 10⁻¹¹Nm² kg⁻²,

3 N = (6.67 × 10⁻¹¹Nm² kg⁻²) × (M²)/ (25 cm)²

M² = 2811.09 × 10³ Kg²

M = 53027 Kg

Therefore, the mass of each sphere is equal to 53027 Kg.

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The velocity of the bowling ball travelling after the collision will be 6.4 m/sec. Apply law of conservation of momentum principle in given problem.

According to the law of conservation of linear momentum before the collision is equal to the momentum after the collision. These laws state that about how momentum gets conserved.

Apply law of conservation of momentum principle;

m₁v₁+m₂v₂=(m₁+m₂)V

6 kg×5 m/s+1.5 kg×12= 7.5 kg*V

48=7.5 kg*V

V=6.4 m/sec

Hence,the velocity of the bowling ball travelling after the collision will be 6.4 m/sec.

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The work-energy theorem states that a force acting on a particle as it moves over a distance changes the kinetic energy of the particle if the force has a component parallel to the motion.

The work-energy theorem is a fundamental principle in physics that relates the work done on an object to its change in energy. According to the theorem, when a force acts on a particle and causes it to move over a certain distance, the work done by the force changes the energy of the particle. Specifically, if the force has a component parallel to the motion of the particle, it can change the particle's kinetic energy.

Kinetic energy is the energy associated with the motion of an object, and it depends on its mass and velocity. When a force acts parallel to the motion of the particle, it can either increase or decrease the particle's speed, thus altering its kinetic energy. If the force is in the same direction as the particle's velocity, it adds energy to the particle and increases its kinetic energy. Conversely, if the force is in the opposite direction to the particle's velocity, it subtracts energy from the particle and decreases its kinetic energy.

In summary, the work-energy theorem states that a force acting on a particle over a distance changes the kinetic energy of the particle if the force has a component parallel to the motion. It highlights the connection between work, force, distance, and energy, providing a useful tool for analyzing the behavior of objects in various physical systems.

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The answer is

Pitch of the buzzer increased (higher tone) as it moves towards the observer

The correct option that explains the change in the observed pitch of the buzzer as it moves  towards the observer is;

A; pitch of the buzzer increased (higher tone) as it moves towards the observer

In conclusion, the pitch of the buzzer will increase as it moves towards the observer.

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Answer:

Different types of waves on the electromagnetic spectrum share the same speed, which is the speed of light in a vacuum, approximately 299,792,458 meters per second (or about 186,282 miles per second). All types of electromagnetic waves, including radio waves, microwaves, infrared radiation, visible light, ultraviolet radiation, X-rays, and gamma rays, travel at the same speed in a vacuum. This is one of the fundamental properties of the electromagnetic spectrum.

The intensity of sound can be calculated using the formula: Intensity (I) = Power (P) / Area (A).Plugging in the given values, we have: Intensity (I) = 8.8 × 10^-4 W / 5.0 m^2.

Calculating this expression gives us an intensity of 1.76 × 10^-4 W/m^2.

Therefore, the correct answer is: 1.6 × 10^-4 W/m^2.

The intensity of sound represents the amount of power per unit area. It is calculated by dividing the power of the sound wave by the area through which it is passing. In this case, the given power is 8.8 × 10^-4 W, and the area is 5.0 m^2. Dividing the power by the area gives us an intensity of 1.76 × 10^-4 W/m^2.

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Answer:

8 g/cm³

Explanation:

density=mass/volume

volume=2*2*2=8 cm³

mass=64 g

density=64/8=8 g/cm³

The density of a 2 cm x 2 cm x 2 cm cube with a mass of 64 g is equal to 8 g/cm³.

Density can be defined as the material mass per unit of volume. The symbol commonly used to represent density ρ and the letter 'D' can also be used.

The mathematical equation of the density can be represented as written below:

Density = Mass /Volume

or,   ρ = m/V

The density of a material varies with pressure and temperature. There is a small variation for solids and liquids of any material but much larger for gases. Increasing the pressure of material decreases the volume and thus increases its density.

Given the volume of the cube =  2 cm x 2 cm x 2 cm

V = 8 cm³

The mass of the cube, m = 64 g

The density of the cube can be calculated from the above-mentioned formula:

Density = Mass of cube/volume

D = 64/8

D = 8 g/cm³

Therefore, the density of the cube is 8 g/cm³.

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Answer:

Long short

Explanation:

1

Dogs that are bigger are selected to be parents.

2

The parents are bred together, and their offspring will be different sizes.

3

The biggest offspring will be selected and bred together.

4

This cycle continues until the dogs have been selectively bred to be bigger than the current world record size.

5

Selective breeders need to ensure that they are not also selecting for disadvantageous traits, like genetic limb defects.

Ur gonna need this...

Brainliest plzzz..thanks..sorry Messy

Answer:

Geological and atmospheric changes happening over a long time scale can cause short extinctions.

Explanation:

Answer:

m1=100kg

m2=6×10^24kg

r=6400km

G=6.6×10^-11

F=?

as we know that

F=G m1.m2/r²

F=6.6×10^-11×100×6×10^24/(6400)²

F=6.6×10^-11×6×10^26/4.096×10^7

F=6.6×10^-11×1.465×10^19

F=9.67×10^8N

Answer:

Third Law Of Motion.

Explanation:

The law of interaction, the third one, explains that if one body exerts a force on a second body, the second body exerts a force equal in magnitude and opposite in direction on the first body.

Answer:

S = V t     where S is the horizontal distance traveled

1/2 g t^2 = H       where H is the vertical distance traveled

t^2 = 2 H / g

V^2 = S^2 / t^2 = S^2 g / (2 H) combining equations

tan theta = H / S

V^2 = S g / (2 tan theta)

Using S = L cos theta

V^2 = L g cos theta / (2 tan theta)

Giving V in terms of L and theta

Newton's law of universal Gravity:

F = G * (M1 * M2)/ r^2

Where:

G = gravitational constant = 6.674 x10^-11 Nm^2kg^2

M1 = mass 1 = 45.9 kg

M2 = mass 2 = 5.98 x 10 ^24 kg

r = Distance between the 2 objects = 6.38 x 10 ^6 m

Replacing;

F = 450.048 N

To solve this problem, we can apply the principle of conservation of momentum. To find the resulting speed of the block, we need to determine the velocity of the block after the collision.

we can write the equation for conservation of momentum in the x-direction as:

(m_bullet * v_bullet_initial) + (m_block * v_block_initial) = (m_bullet * v_bullet_final) + (m_block * v_block_final)

where:

m_bullet = mass of the bullet = 4.60 g = 0.0046 kg

v_bullet_initial = initial velocity of the bullet = 632 m/s

m_block = mass of the block = 710 g = 0.710 kg

v_bullet_final = final velocity of the bullet = 436 m/s

Substituting the known values into the equation and solving for v_block_final, we get:

(0.0046 kg * 632 m/s) + (0.710 kg * 0 m/s) = (0.0046 kg * 436 m/s) + (0.710 kg * v_block_final)

0.0029072 kg·m/s = 0.0020056 kg·m/s + (0.710 kg * v_block_final)

0.0009016 kg·m/s = 0.710 kg * v_block_final

v_block_final = 0.0009016 kg·m/s / 0.710 kg

v_block_final ≈ 0.00127 m/s

(b) The speed of the bullet-block center of mass can be calculated using the conservation of momentum equation in the x-direction:

(m_bullet * v_bullet_initial) + (m_block * v_block_initial) = (m_bullet + m_block) * v_center_of_mass

we have:

(0.0046 kg * 632 m/s) + (0.710 kg * 0 m/s) = (0.0046 kg + 0.710 kg) * v_center_of_mass

2.9152 kg·m/s = 0.00531 kg * v_center_of_mass

v_center_of_mass = 2.9152 kg·m/s / 0.00531 kg

v_center_of_mass ≈ 549.055 m/s

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Answer:

Time taken for car to stop = 0.89 seconds (Approx.)

Explanation:

Given:

Mass of car = 1100 kg

Speed of car = 15 m/s

Impact force = 185,000 N

Find:

Time taken for car to stop

Computation:

Change in momentum of car = M(v) - M(u)

Change in momentum of car = 1100(0) - 1100(15)

Change in momentum of car = -16,500

Time taken for car to stop = I Change in momentum of car I / Impact force

Time taken for car to stop = I-16,500I / 185,000

Time taken for car to stop = 0.89 seconds (Approx.)

The time it takes for the car to stop will be 0.89 sec. Due to the external resistive force, the car will stop after some time.

The momentum is defined as the product of mass and the velocity of the body. It is denoted by the letter P. It occurs due to the applied force. Its unit is Kg m/s².

The change in the momentum of the car is given as;

\(\rm \triangle P = m(V-U) \\\\ \triangle P = 1100(0-5) \\\\ \rm \triangle P =-16,500 Kgm/s\)

The time taken for a car to stop will be;

\(I \triangle p= F\triangle t \\\\ \rm t = \frac{\triangle p }{F} \\\\ \rm t = \frac{|-16500|}{18500} \\\\ \rm t =0.89 \ sec\)

Hence the time it takes for the car to stop is 0.89 sec.

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Answer:

1) Used in optical instruments such as telescopes.

2) Used to form mirages

Explanation:

1) Perhaps the simplest example of this is the astronomical refractor telescope with a right-angle eyepiece holder. Astro scopes mostly point at things high in the sky, but it is inconvenient to place your eye low to look up through the scope, so the light path is bent 90 degrees just before the eyepiece. This can be done with a mirror, but using a simple 45 degree prism (internal angles 45, 45, and 90 degrees) will do the 90 degree bend more efficiently.

2) So when a light pass from cold air to hot air light tends to bend from its path which is known as refraction. As the light get refracted it reaches to a point where the light tends to form 90 degree angle.

Answer:

A, 0.050 Hz

Explanation:

1) Frequency = speed divided by wavelength

time is 2* 60 = 120 seconds

distance = 6 wave lengths

speed = distance divided by time

speed = 6 wave lengths divided by 120

Hope this helps!

Answer:

The eddy currents will be very small.

Explanation:

An object made of several thin conducting layers separated by insulation may not be affected by magnetic damping because the eddy current produced in each layer due to induction will be very small and the opposing magnetic flux produced by the eddy currents will be very small.

Answer:the voltmeter measures the potential difference of the circuit,. Voltmeter is a device used to measure potential difference.

Explanation:

The semimajor axis of the comet's orbit is approximately 3.53 x 10^13 meters.the greatest distance from the Sun of the Woo Woo day comet, expressed in terms of the mean orbit radius R_p​ of Pluto, is approximately 12.2.

      (a) The semimajor axis of the comet's orbit can be calculated using the formula:T^2 = (4π^2 a^3)/(G(M + m))
where T is the period of the comet's orbit, a is the semimajor axis, G is the gravitational constant, M is the mass of the Sun, and m is the mass of the comet (which we assume to be negligible compared to the mass of the Sun). Rearranging the formula, we get:
a = (T^2 G(M + m))/(4π^2)
Substituting the given values, we get:
a = [(1420 years x 365.25 days/year x 24 hours/day x 3600 s/hour)^2 x 6.6743 x 10^-11 N m^2/kg^2 x (1.9891 x 10^30 kg)]/(4π^2) ≈ 3.53 x 10^13 m

Therefore, the semimajor axis of the comet's orbit is approximately 3.53 x 10^13 meters.
(b) The greatest distance from the Sun (aphelion distance) can be calculated using the formula:
r_a = a(1 + e)
where r_a is the aphelion distance and e is the eccentricity of the orbit. Substituting the given values, we get:
r_a = a(1 + e) ≈ 3.53 x 10^13 m x (1 + 0.9932) = 7.19 x 10^13 m

To express the result in terms of the mean orbit radius R_p​ of Pluto, we can divide the result by the mean distance of Pluto from the Sun:

r_a/R_p​ = (7.19 x 10^13 m)/(5.91 x 10^12 m) ≈ 12.2

Therefore, the greatest distance from the Sun of the Woo Woo day comet, expressed in terms of the mean orbit radius R_p​ of Pluto, is approximately 12.2.

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F = ma, or force equal to mass times acceleration, is Newton's second law of motion.

Second Law of Movement by Newton Since it shows how powers and movement are connected, F=ma is essential. You can use it to determine an object's velocity and position, as well as its acceleration with known forces. For inventors, scientists, and engineers, This is extremely helpful.

As per Newton's Second Law of Movement, when a power works on a mass, the mass speeds up (gains speed) (object). When you ride a bicycle, you can see this law of motion in action in a great way. Your bike makes up the mass. Your leg muscles press against the bicycle's pedals to produce the force.

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Answer:

1. True 2.0

Explanation:

1. When balanced forces are acting on an object, they have a constant velocity, meaning that the velocity remains the same.

2. When an object begins at a starting point and returns back to that same starting point, its displacement would be 0.

I'm pretty confident in these answers, however, you must have studied this more than me, so let me know if you have any questions or concerns at all, I'll be glad to help. :)

Answer:

Pretty sure magnetic waves thank me later bro bro

There is an greater upward trend in the number of student enrollment in physical science than in chemistry over the years.

From the line graph attached;

For physical science ;

For chemistry,

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Pierre Charles L'Enfant was an inventor and architect who is best known for designing the city plan of Washington, D.C., the capital of the United States.

An inventor is a person who creates new and useful ideas or devices that are often innovative and novel. Inventors can work in a wide range of fields, from technology and engineering to medicine and the arts. Their ideas and inventions can be revolutionary and can have a significant impact on society and the economy. The process of inventing typically involves identifying a problem or need, and then developing and testing a solution or device to address that problem. Inventors may work alone or as part of a team, and they may collaborate with other professionals, such as engineers, scientists, or designers, to bring their ideas to fruition.

Here,

L'Enfant was born in France in 1754 and received his training as an engineer and military officer. He served in the Continental Army during the American Revolution and later worked as a city planner and surveyor.

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Answer:

Harmful bacteria are called pathogenic

Explanation:

Harmful bacteria are called pathogenic bacteria because they cause disease and illnesses like strep throat, staph infections, cholera, tuberculosis, and food poisoning.

Answer:The sun produces energy through nuclear fusion.

Explanation:

The sun produces energy through nuclear fusion. The sun is a large ball of hydrogen and helium undergoing constant nuclear fusion, in which atoms of hydrogen combine to form helium and release a large quantity of energy. The enormous pressure in the sun keeps the fusion running for huge amounts of time.

Object A in my left hand and object B in my right hand both have the same weight density, meaning they have the same mass per unit of volume.

This means that the objects are of equal size regardless of their mass, since the same amount of space is occupied regardless of the number of kilograms or pounds the objects have. This is due to weight density being a measure of the pounds per cubic meter of a given substance, which makes it easier to compare similar objects despite being different sizes.

In the case of these two objects, their weight density is the same, thus making them equal in size. This means that when object A is placed into a certain container, object B can fit in that same container without requiring any additional space, since the density of both objects is the same.

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Correct question is :

If object A in your left hand and object B in your right hand both have the same weight density, then they ____.