a plane takes off at 34 m/s if it accelerates from rest and takes 7.2 seconds to lift off find the acceleration

The speed of the wave is 5 m/s.

Wavelength and time period both influence wave speed. The distance between two similar spots on adjacent waves is known as the wavelength. Time period is the amount of time needed for a wave to pass a fixed location.

This equation demonstrates how the three variables are connected:

Speed of wave = Wavelength ÷ Time period.

Given parameters:

The wavelength of the wave; λ = 100 m.

Time period of the wave; T = 20 s.

Then, speed of the wave; v = ?

We know that,

The speed of the wave; v = λ/T = (100m/20s) = 5 m/s.

Hence, the speed of the wave is 5 m/s.

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Answer:

D. Frequency

Explanation:

The machine produces compression waves in a spring that is 120cm long and it pulse twice every seconds. The property the wave exhibits by exhibiting the value of two per second is the Frequency.

Amplitude of a a wave is the maximum displacement from the equilibrium position. The amplitude of an object is equal to one half the path of the vibration path. The amplitude of a wave is proportional to the amplitude of the source. Amplitude measures how big a wave is . Amplitude of a wave usually look at the energy of a wave so it is not the amplitude .

The frequency of a wave gives the number of  wave that passed fixed point at a given time.

To represent a fraction greater than 3/5, choose a numerator larger than 3 and match it with a denominator. Fractions like 4/6, 5/7, or 10/12 are examples of fractions greater than 3/5.

Fractions greater than 3/5 are represented by fractions where the numerator is larger than the denominator. For example, 4/6 is greater than 3/5 because the numerator 4 is greater than the denominator 6.

To find a fraction larger than 3/5, you can choose any numerator larger than 3 and pair it with a denominator to form a fraction greater than 3/5, such as 4/6, 5/7, or 10/12.

Answer:

The potential energy is  14700J.

Explanation:

Definition of potential energy:

Potential energy is the energy that measures the ability of a object  to perform a job based solely on its position (height at which the object is from the ground), and it is calculated with the following formula:

Ep= m*g*h Formula (1)

Ep: Potential energy in Joules (J)

m : mass (kg)

g: acceleration due to gravity (m/s²)

h: height (m)

Data

m= 150 kg

g = 9.8 m/s²

h=  10 m

Problem development

We replace data in formula (1)

Ep=  150 kg*9.8 m/s²*10 m = 14700 N*m =  14700J

Ep=  14700J

Answer:

C

Explanation:

decreased precipitation

Answer: 110 cal

It is given that he specific heat of Iron is [tex] 0.11 cal/g^o C[/tex].

Mass of iron fork 20 g

Heat energy is needed to raise the temperature of this from [tex] 25^o C to 75^o C [/tex]

we can use the following formula to calculate heat energy:

[tex] Q=mC \Delta T [/tex]

where Q is the heat required to raise the temperature by [tex]\Delta T[/tex] of a mass m having specific heat C.

Insert the values:

[tex] Q=20 g \times 0.11 cal/g^oC (75^o C -25^o C)\\\Rightarrow Q=(2.2\times50)cal=110 cal[/tex]

Thus, heat required to raise the temperature of iron fork is 110 cal.

Answer: B

To measure a lower-pitched sound wave, you would measure fewer compressions per second. Pitch relates to frequency by measuring how many times a second the particles vibrate. Therefore, the lower-pitched sounds, the fewer compression waves or sound waves are produce because low-frequency sounds have greater distance between each wave.

Moreover, the frequency of a wave is measured as the number of complete back-and-forth vibrations of a particle of the medium per unit of time. The universal unit for frequency used is the Hertz (abbreviated Hz), where 1 Hertz = 1 vibration/second.

The answer is B. Tectonic. This is not a recognized type of plate boundary. The plate boundaries recognized by geologists are transform, convergent, and divergent.

The type of plate boundary that is not recognized among the classic types established by geologists is B. Tectonic. In plate tectonics, a discipline within earth sciences, plate boundaries are classified into three main types: A. Transform, C. Convergent, and D. Divergent. Each type describes a different way in which tectonic plates, the large pieces of Earth's lithosphere, interact with each other. Transform boundaries occur when plates slide past each other horizontally. Convergent boundaries form when plates come together or converge. Divergent boundaries are created when plates move apart from each other or diverge. 'Tectonic' is not a type of plate boundary, but rather an adjective used to describe phenomena related to Earth's tectonic plates.

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Answer:

coastline

Explanation:

its the coastline

A compound eye, primarily found in arthropods, consists of numerous small units called ommatidia. These units, which include lenses and visual cells, create a mosaic image allowing insects to detect motion efficiently due to the flicker effect.

The compound eye is an optical structure found in certain animals, notably arthropods such as insects and crustaceans. Unlike the human eye, which has a single lens, the compound eye is made up of numerous small visual units called ommatidia. Each ommatidium is a self-contained photoreception unit that consists of a lens, cone, visual cells, and pigment cells. These units capture parts of the visual field and send nerve impulses to form a mosaic image, similar to a pattern of light and dark dots.

Flicker effect is a distinctive feature of compound eyes which makes them highly sensitive to motion. As an object moves across an insect's visual field, some ommatidia are exposed to light while others are not, creating a flicker that the insect can detect. This property allows insects to respond quickly to moving objects, which is crucial for their survival. Animals with compound eyes, like honeybees, are particularly adept at recognizing motion, preferring to visit wind-blown flowers over stationary ones.

The visual acuity in compound eyes is determined by the number of ommatidia and the fineness of the mosaic they create.

Answer:

The correct answer is A. The system absorbs 75 J of heat, and its volume is halved.

Explanation:

For this question, we want the system's molecular motion to experience an INCREASE. So if your question is asking for a DECREASE in molecular motion, this answer does not apply! Instead, it would be "The system releases 75 J of heat, and its volume doubles." Let me explain.

Molecular motion increases with increasing temperature, since collisions increase. For that reason, we want to look for the answer choice that experiences an increase in temperature, with would mean that the system absorbs (NOT RELEASES) 75 J of heat. Additionally, a system's molecular motion increases when its volume decreases. With a smaller volume, molecules are closer together and hit each other more often, increasing molecular motion. And so, for the motion of molecules to INCREASE, the volume would actually have to decrease or be halved! Answer choice A is correct!

If that explanation isn't enough to sway you, know that I took this computer-scored test and received 100%. If you review your study notes from this unit, you'll see that my answer makes sense. I hope that helped! :)

Answer: D) 18 miles driven in a week

Explanation:

A unit rate describes how many units of the first type of quantity corresponds to one unit of the second type of quantity.

a. 47 c for 2 pens

thus the price is for 2 pens and not 1.

b. 20 gallons or 2 hours

Thus the amount of gasoline used is for 2 hours and not 1.

c. 15 hours for 3 months

Thus the time given is for 3 months.

d. 18 miles driven in a week

The distance given is for 1 week and thus is the unit rate.

Thus unit rate is 18 miles driven in a week.

Answer: Finley, Xander, Max

Explanation:

The acceleration of each runner is given by:

[tex]a=\frac{v-u}{t}[/tex]

where

v is the final velocity

u is the initial velocity

t is the time taken

- Xander: his acceleration is [tex]a=\frac{4.5 m/s-0}{3.5 s}=1.29 m/s^2[/tex]

- Finley: his acceleration is [tex]a=\frac{3.6 m/s-0}{4.2 s}=0.86 m/s^2[/tex]

- Max: his acceleration is [tex]a=\frac{7.3 m/s-0}{1.2 s}=6.08 m/s^2[/tex]

So, in order from least to most acceleration:

Finley, Xander, Max

Final answer:

Longer piano strings and longer air columns in musical instruments both produce lower notes due to lower frequencies of vibration. The lowest note on a piano correlates with the longest string, similar to how the longest air column in a wind instrument produces the lowest note. For a clarinet, the third harmonic frequency would be three times the fundamental frequency (e.g., 3 × 147 Hz = 441 Hz).

Explanation:

The student's question relates to how vibrations in piano strings and air columns generate sound. For a piano, the pitch of a note is determined by the frequency of the vibrating string, with longer strings producing lower notes. The sound production principles in both cases rely on the physical properties of the system - in the piano, the length, tension, and mass of the string, and in air columns, the length and shape of the column. When comparing to an air column in a test tube or bottle, the longest string on the piano corresponds to the longest air column, which also produces the lowest note. Consequently, the lowest note on the clarinet is produced when all the tone holes are closed, yielding the longest effective length of the air column and hence the longest wavelength and lowest frequency.

In relation to air columns, the frequency of the third harmonic in a clarinet can be predicted based on the fundamental frequency. If the fundamental frequency is 147 Hz, the third harmonic, being three times the fundamental frequency, would be 3 × 147 Hz = 441 Hz.

The scatter plot diagram shows us the relation of icecreams with that of consumption

Learn more about the conclusion can you draw based on the data in the scatterplot.

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Final answer:

The scatter plot shows a linear pattern, indicating a significant linear relationship between the X and Y variables.

Explanation:

The scatter plot shows a linear pattern in the data, where the points roughly form a straight line. This indicates a linear relationship between the X and Y variables. However, it is important to consider the correlation coefficient as well.

If the correlation coefficient is significantly different from zero, it suggests a strong linear relationship. In this case, there is sufficient evidence to conclude that there is a significant linear relationship between the X and Y variables.

Therefore, the X and Y variables would be good candidates for linear regression to predict outcomes.

Taking into account the definition of photon and energy of a photon, the correct answer is the first option: The energy of a photon with a frequency of 2.2×10¹⁶ Hz is 1.5×10⁻¹⁷ J.

You have to know that electromagnetic radiation carries energy, which can be absorbed or emitted. To explain the processes of emission and absorption, Plank and Einstein proposed that the energy of radiation is composed of indivisible units (quanta). In each elemental process only a quantum of light can be emitted or absorbed. Each of these quanta was called a "photon".

The exchanges of energy between matter and radiation take place not continuously, but by discrete and indivisible quantities or quanta of energy. The quantum of energy is proportional to the frequency of radiation.

The relationship between the amount of energy (E) transported by the photon and its frequency (f) is determined by the following expression, where the energy of a photon is obtained by multiplying Planck's constant h by the frequency f of electromagnetic radiation:

E=h×f

In this case, you know:

Replacing:

E= 2.2×10¹⁶ Hz× 6.63×10⁻³⁴ Js

E= 1.4586×10⁻¹⁷ J≅ 1.5×10⁻¹⁷ J

The correct answer is the first option: The energy of a photon with a frequency of 2.2×10¹⁶ Hz is 1.5×10⁻¹⁷ J.

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Answer:

Force, F = 352,800 N

Explanation:

Given that,

Mass of the rock, m = 36000 kg

Acceleration due to gravity, [tex]a=9.8\ m/s^2[/tex]

We need to find the force that the rock is exerting in its pedestal. It can be calculated using Newton’s second law of motion as :

F = m × a

[tex]F=36000\times 9.8[/tex]

F = 352,800 Newton

So, the force acting on the rock is 352,800 Newton. Hence, this is the required solution.

It also moves with respect to the Earth's crust; this is called polar motion. Precession is a rotation of the Earth's rotation axis, caused primarily by external torques from the gravity of the Sun, Moon and other bodies. The polar motion is primarily due to free core nutation and the Chandler wobble.

Answer:

2 , 4

Explanation:

If we mechanically squeeze a gas into a smaller volume the pressure and temperature will increase but we can't predict how much each one will change.

Answer: Option A

Explanation:

When we squeeze a gas or a material, a force acts upon it making it to compress which increases the pressure subsequently as tension and compression is always accompanied by pressure.

The temperature of gas also increases as work is done due to transfer of energy which alters the existing temperature.

Light is refracted when it passes through a hand lens that makes the image of the penny appear larger.

This is defined as the process in which waves change direction when they move from one medium to another.

The hand lens changes the speed of the waves which therefore brings about this occurrence.

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