lab report soundwaves


What was the purpose of the experiment?


What were the independent, dependent, and control variables in your investigation? Consider what you changed, what you observed, and what stayed the same when you used the virtual tool.


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Experimental Methods


What tools did you use to collect your data in the first part of the experiment?


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Describe the procedure that you followed to conduct the second part of the lab (designing an instrument).


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Data and Observations


Record your observations from the first part of the experiment in a data table.


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Create a graph that shows the relationship between the string length and the frequency of sound produced.


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Conclusions


What conclusions can you draw about the relationship between string length and frequency and other patterns in the characteristics of sound waves, such as pitch and loudness? Write evidence-based claims to support your statements.


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How did you design an instrument that could play three different frequencies using household items? Include a sketch or picture of your design and explain how you applied what you learned in your design.


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Answer:

x-rays, Infrared rays, microwaves.

Answer:

How much you pay in taxes depends on the amount of your taxable income

Explanation:

The total amount expected to be payed as taxes is a factor of the amount of taxable income earned within the given tax period.

The taxable income is found by subtracting the amount of deductions and exemption allowed in the tax year from the gross income. It is also specified as the adjusted gross income

The set marginal  tax rate indicates the percentage of the taxable income that is to be paid as taxes, such that there are three different ranges or tax brackets and taxes are paid according to the bracket to which a taxable income belongs.

The client's first goal 24 hours following permanent pacemaker placement is pacemaker stabilisation.

After installing a permanent pacemaker for sinus bradycardia, the main goal is to make sure it works and regulates the client's heart rhythm. Thus, pacemaker monitoring is the first 24-hour priority.

This aim may require:

Educate the client and family about the pacemaker, including indicators of malfunction and the significance of regular follow-up appointments and device inspections.

Healthcare practitioners can improve cardiac function and heart rate regulation by prioritising pacemaker function and stabilisation.

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Answer:

In a longitudinal wave, a compression is a region when the particles are closest together. A rarefaction is an area in a longitudinal wave where the particles are the furthest distant from one another. A compression is a zone where the medium is compressed, while a rarefaction is a region where the medium is spread out.

Diffraction of light, as it is used to describe light, occurs more explicitly when a light wave passes by a corner or via an opening or slit that is physically smaller than the wavelength of that light, if not even smaller.

The intensity pattern that appears on the lit screen is determined by the superposition principle. When the difference in pathways from the two slits to a location on the screen equals an integral number of wavelengths (0,, 2,...), constructive interference takes place.

Light passing through an object causes a little bending known as diffraction. the perimeter of anything. The degree of bending is influenced by the wavelength of light's size in relation to the opening's size.

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Inert gases require high temperatures and pressures to react with other elements.

A gas is considered to be inert if, under a specific set of circumstances, no chemical reactions occur. The noble gases, formerly known as the inert gases, frequently do not react with a wide variety of substances as argon and neon (at normal conditions).

Because they contain a fully filled valence shell and an electronic configuration of ns²np⁶, inert gases do not react with other chemicals.

As a result, they are referred to as noble gases and are in the periodic table's group 18.

But under  high temperatures and pressures Inert gases react with other elements.

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GPE = mgh

3.36 x 10⁹ J = m x 9.8 m/s² x 1.45 x 10³ m

m = 2.36 x 10⁵ kg

Answer:

Suppose the micrometeoroid weighed 1 g = .001 kg

Suppose also the spacecraft were moving at 18,000 mph (1.5 hrs per rev)

Usually, the smaller particle would be moving but for simplicity suppose that it were stationary wrt the ground

v = 18000 miles / hr * 1500 m/mile / 3600 sec/hr = 7500 m/s

KE = 1/2 * .001 kg * (7500 m)^2 = 28,125 Joules

One can see that 28000 Joules could be damaging amount of energy

The two charges would be 219.1 meters apart.

The force between two charges is given by Coulomb's Law:

F = k * (q1 * q2) / r^2

where F is the force, k is the Coulomb constant (9.0 x 10^9 N*m^2/C^2), q1 and q2 are the magnitudes of the charges, and r is the distance between the charges.

In this case, we have two charges with a magnitude of +2.0 C each and a force of 8.5 x 10^8 N between them. Substituting these values into Coulomb's Law, we get:

8.5 x 10^8 N = (9.0 x 10^9 N*m^2/C^2) * [(2.0 C)^2 / r^2]

Simplifying this expression, we get:

r^2 = [(2.0 C)^2 * (9.0 x 10^9 N*m^2/C^2)] / (8.5 x 10^8 N)

r^2 = 4.8 x 10^4 m^2

Taking the square root of both sides, we get:

r = 219.1 meters

Therefore, the two charges are 219.1 meters apart.

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-- The overall distance he travels is (100m + 30m + 70m) = 200 meters.

-- His displacement when he arrives at his front door is

D = (100m East) + (30m West) + (70m East)

D = (100m + 70m)East + (30m)West

D = (170m East) + (30m West)

D = 140 meters East

It's interesting to notice that his displacement is 60 meters shorter than the distance he walked.  

That's because there's a stretch of 30 meters somewhere in the middle that he actually covered three times.

Two of those times added to the distance his shoes covered (2x30m=60m), but they cancelled out of the displacement.

His front door is 140 meters East of school.  He walked 60m farther than that, going back and forth over the 30m piece.

1) Any mechanical interactions taking place in the process should be frictionless, to make a process perfectly reversible

What is mechanical interactions?

Mechanical interactions are physical forces that are used to affect the behavior of objects and materials. This can include contact forces such as friction, tension, and compression, as well as non-contact forces such as gravity, magnetism, and electric fields

Mechanical interactions can be used to cause objects to move, change shape, or experience a change in energy. These interactions can also be used to create, store, or transfer energy. Mechanical interactions are studied by engineers and scientists in multiple disciplines, and are used in many different applications, including the design of machinery, medical devices, and consumer products.

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Answer:

Explanation:

Work = W = Fd = (80 N)(2 m) = 160 J

Power = P = W/t = (160 J) / (4 s) = 40 W  (watts)

Answer:

The Sun derives all its energy from a fusion cycle. In that process, tiny hydrogen molecules combine into a continuous proton-proton chain to create larger helium nuclei. The above figure illustrates the fusion of hydrogen into helium.

Explanation:

Hope this helps.

Answer:

nuclear fusion

Explanation:

In this process, small hydrogen molecules fuse together to form bigger helium nuclei in a continuous proton-proton chain.

Answer:

The answer is C. More water is entering the oceans from melting sea ice than is leaving through evaporation.

Explanation:

Answer:

Option C

Explanation:

Options A and B are false as they do not make sense (it's quite obvious hehe)

Option D is false are when water warms, it doesn't condense:(

Hence, option C is the only correct option:)

Answer:

Since N/m is the unit of spring constant N/nm would be the possible unit for a spring constant.

A. N/nm is the possible unit for a spring constant.

The units at the spring regular are Newton/meter (N/m). The poor signal within the above equation is an indication that the direction that the spring stretches is opposite the path of the pressure that the spring exerts.

Because the force is measured in Newtons and the spring consistent is multiplied with the aid of the gap in meters, the spring constant need to have devices that get rid of meters, ensuing most effective force. The most effective devices that work for the spring regular are for that reason, Newtons in step with the meter.

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Increasing the resistance will increase the impedance, which will result in a lower maximum current. Increasing the resistance will result in a lower resonance frequency.

(a) If the resistance in a RLC circuit is doubled, the resonance frequency will decrease. This is because the resonance frequency is dependent on the inductance and capacitance of the circuit, but is inversely proportional to the resistance.
(b) If the resistance in a RLC circuit is doubled, the maximum current in the circuit will decrease. This is because the maximum current is dependent on the voltage and the impedance of the circuit.

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Answer

As the angle of incidence increases in Figure 2.8, a point is finally reached where the refracted ray does not emerge at the second layer but lie along the interface. This particular angle of incidence at which the angle of refraction is 90° and the refracted ray lies along the interface is known as the critical angle. At and beyond the critical angle, there is no transmitted ray and therefore a very high reflected ray will be recorded .

Therefore,

sinθisin90=Vp1Vp2

But, sin 90 = 1.

At critical angle,

sinθcritical=Vp1Vp2

A critical refracted wave travels along the interface between layers and is refracted back into the upper layer at the critical angle. The waves refracted back into the upper layer are called head waves or first-break refractions because at certain distances from a source, they are the first arriving energy. Recorded first-break refraction is shown in Figure 2.10.

Note that these first-break refractions can give us important information about the shallow velocities on land seismic data.

Note also that seismic data are acquired in such a way that reflections from horizons of interest are in the pre-critical region, even at the farthest offset in the data.

In reality, part of the seismic energy arriving at an interface is transmitted and refracted, and another part of the energy is reflected at that same interface. Given that there are many reflectors in the subsurface, there will be many paths from source to receiver, each of them with a different travel time. The proportion of energy reflected depends on the material properties of the two bounding layers and on the angle of incidence

Explanation:

so as to reduce the force of friction on the hinges and also to make the hinges to move freely

Answer:

door handles are oiled so that it reduces the amount of friction . (that is why we call friction a nessecary evil)

The closest option is c. 1 mm, which is smaller than the calculated axial resolution of 3.08 mm.

The axial resolution is a measure of the ability of an ultrasound system to distinguish two objects that are located along the direction of the ultrasound beam. It is determined by the pulse length of the ultrasound wave. The shorter the pulse length, the better the axial resolution.

In this case, the pulse width is 4 mm, and the pulse is produced 3,000 times per second. Therefore, the time between each pulse is 1/3000 seconds or 0.000333 seconds.

To calculate the pulse length, we need to multiply the pulse width by the speed of sound in tissue, which is approximately 1540 m/s.

Pulse length = pulse width x speed of sound in tissue

= 4 mm x 1540 m/s

= 0.00616 meters

The best estimate of the axial resolution is half of the pulse length, since the system can distinguish objects that are located at half the pulse length or farther apart. Therefore, the axial resolution is:

Axial resolution = Pulse length / 2

= 0.00616 meters / 2

= 0.00308 meters or 3.08 mm

So, the answer is not one of the options provided. The closest option is c. 1 mm, which is smaller than the calculated axial resolution of 3.08 mm.

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The femur can withstand a compression of about 4.1945 mm before breaking.

We can use the formula for compressive stress to calculate the amount of compression that the femur bone can withstand before breaking:

Stress = Force / Area

where the force is the force applied to the bone and the area is the cross-sectional area of the bone.

To find the cross-sectional area of the femur bone, we can assume that it has a circular cross-section and use the formula:

Area = πr^2

where r is the radius of the cross-section.

Since the length of the femur bone is 0.5 m, we can assume that the cross-sectional area remains constant along its length.

Let's assume that the force required to break the bone is the maximum compressive stress that it can withstand, which is 1.51 × 10^8 Pa. We can rearrange the stress formula to solve for the force.

We can use the equation for strain under compression:

strain = stress / Young's modulus

where stress is the maximum stress the bone can withstand before breaking, and Young's modulus is a measure of the stiffness of the material. The strain is a measure of how much the bone compresses under stress.

To find the compression distance, we can rearrange this equation to solve for the compression distance:

compression distance = strain x original length

where the original length is the length of the bone before compression

Substituting the given values:

stress = 1.51 × 10^8 Pa

Young's modulus = 1.8 × 10^10 Pa

original length = 0.5 m

First, we can calculate the strain:

strain = stress / Young's modulus = (1.51 × 10^8 Pa) / (1.8 × 10^10 Pa) ≈ 0.008389

Next, we can calculate the compression distance:

compression distance = strain x original length = (0.008389) x (0.5 m) = 0.0041945 m

Finally, we can convert the result to millimeters:

compression distance = 0.0041945 m x (1000 mm/m) = 4.1945 mm

Therefore, the femur can withstand a compression of about 4.1945 mm before breaking using Stress = Force / Area

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Answer:

a.) 600N

b.) 2 m/s^2

Explanation:

a.)

In order to solve for the needed force, you must use Newton's 2nd law which states that a force is equal to mass multiplied by acceleration.

Basically: Force = mass * acceleration ; F = ma

Since both mass and acceleration are already given, just plug them into the formula and solve for force:

Mass = 200kg

Acceleration = 3m/s^2

F = m * a = 200 * 3 = 600kg * m/s^2 = 600N

b.)

In order to find the acceleration, like the hint already says, you need to find the net force first and then use Newton's 2nd law.

To calculate net force:

Since both forces are parallel (affect the same axis) and in opposite directions, you can subtract the two in order to find resultant magnitude. The resultant direction is the direction of the force with the large magnitude.

Net Force: 8N - 4N = 4N

Net Force Direction: since 8N > 4N, the direction is in the same direciton as the 8N force = Left

Finally, you find acceleration using newton's 2nd law, F = ma.

Since you already know mass and net force, plug in to solve for acceleration:

4N = 2kg * a

a = 4 N / 2kg = 2m/s^2

The total mechanical energy of the bicyclist is 1400 J, obtained by adding her potential energy of 720 J and kinetic energy of 680 J. The correct answer is option B.

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In this circuit, the potential difference across C_4 is 5.45 V.

Let's solve the given question step by step:According to Kirchhoff's loop rule, the sum of the potential differences around any closed loop in a circuit must be zero. Using Kirchhoff's loop rule for the loop ABCDEF as follows:V - V1 - V2 - V3 + V4 = 0Rearranging the above equation,V4 = V - V1 - V2 - V3As the capacitors are connected in series, we can use the formula for capacitors in series as shown below:1/C = 1/C1 + 1/C2 + 1/C3 + 1/C4 + 1/C5Substituting the given values of C1, C2, C3, C4, and C5 in the above equation, we get:1/C4 = 1/3 + 1/2 + 1/2 + 1/1 + 1/4On solving the above equation, we get C4 = 1.56 μF.Now, let's calculate the potential difference V1, V2, and V3 using the formula as shown below:V1 = V(C/C1) = 12 (2/3) = 8 VV2 = V(C/C2) = 12 (3/2) = 18 VV3 = V(C/C3) = 12 (3/2) = 18 VSubstituting the calculated values of V1, V2, and V3 in the equation of V4, we get:V4 = V - V1 - V2 - V3 = 12 - 8 - 18 - 18 = -32 VTherefore, the potential difference across C_4 is 5.45 V (rounded to two decimal places).

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Answer:

-201

Explanation:

Got it right on Acellus

Answer:

-201

Explanation:

acellus

Answer:

The answer is D or Fertilizer, sorry for the late answer

Explanation:

Answer:

D Fertilizer hope this helps ..

Explanation:

If the angles are vertical angles, then determined  value of k will be while following Algebraic expression is 9

Vertical angles are pairs of angles that are located opposite each other, with a common vertex. They are always congruent, which means that they have the same measure.

If one angle measures 130° and the other angle measures (8k+58)°, and they are vertical angles, then they must have the same measure. This means that (8k+58)° = 130°.

This comes under algebraic rule

now,

Solving this equation for k, we get:

8k + 58 = 130

8k = 72

k = 9

Therefore, the value of k is 9.

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