if researchers want to avoid distortions of unexamined opinions and control biases of personal experience, they use:_____.
Answers
If researchers want to avoid distortions of unexamined opinions and control biases of personal experience, they use scientific methods. The scientific method is a systematic, data-driven approach to identifying patterns and testing hypotheses.
The scientific method enables researchers to make objective observations and avoid subjective distortions of unexamined opinions and control biases of personal experience.What is the scientific method?The scientific method is a process for developing and testing theories about the natural world. It is a method of inquiry that involves making observations, asking questions, and testing hypotheses.
The scientific method is important because it enables researchers to make objective observations and avoid subjective distortions of unexamined opinions and control biases of personal experience. The scientific method is also important because it allows researchers to test hypotheses and draw conclusions based on empirical evidence. The scientific method is a reliable way of acquiring knowledge about the natural world that is based on evidence rather than intuition or personal experience.
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Related Questions
draw a figure of a simple pendulum explain its amplitude and effective length ?
Answers
Answer:
Explanation:
A simple pendulum consists of a mass (usually represented as a small object or bob) attached to a string or rod of negligible mass. The mass is free to swing back and forth under the influence of gravity.
In the figure, the point of suspension is denoted by "O," and the mass (bob) is represented by the small circle. The string or rod is represented by the vertical line connecting the point of suspension to the bob.
Amplitude:
The amplitude of a pendulum refers to the maximum displacement or swing of the bob from its equilibrium position. In the figure, the amplitude can be represented by the angle formed between the vertical position and the position of the bob when it swings to its maximum distance on one side. It is usually denoted by the symbol "A."
Effective Length:
The effective length of a pendulum refers to the distance from the point of suspension to the center of mass of the bob. It represents the distance over which the mass swings back and forth. In the figure, the effective length can be measured as the length of the string or rod from the point of suspension to the center of the bob. It is usually denoted by the symbol "L."
It is important to note that the amplitude and effective length of a simple pendulum affect its period of oscillation (the time taken for one complete swing). The relationship between these parameters and the period can be described by mathematical formulas.
Overall, the simple pendulum is a fundamental concept in physics and provides a simplified model for understanding oscillatory motion and the principles of periodic motion.
(FREE FALL) An object falls from an unknown height, crosses last 196m in 4s. Find the falling time and height.
Answers
Answer: An object is dropped from a height of 75.0 m above ground level.
Explanation: I hoped that helped !
What is the energy, in J, of light that must be absorbed by a hydrogen atom to transition an electron from n = 3 to n = 6? Submit an answer to three signficant figures.
Answers
It takes \(1.815 * 10^{-19}\) Joules of energy for a hydrogen atom to transition an electron from n=3 to n=6.
Energy absorbed by photon (eV)
\(E = 13.6 Z^{2} ( \frac{1}{n_{1} ^{2} } -\frac{1}{n_{2} ^{2} } )\)
where Z is the atomic number
\(n_{1}\) lower energy state
\(n_{2}\) higher energy state
\(E =13.6* 1^{2} ( \frac{1}{3 ^{2} } -\frac{1}{6 ^{2} } )\\\\E = 13.6 (\frac{1}{9} -\frac{1}{36} )= \frac{13.6 *3}{36}\)
E = 1.133 eV
To convert energy into J from eV
Multiply it by \(1.602 * 10^{-19}\)
E = \(1.133 *1.602 * 10^{-19}\)
E = \(1.815 * 10^{-19}\) J
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How much kinetic energy does a skater have velocity of 5m/s mass of 65 kg
Answers
Answer:
its 812.5
Explanation:
the formula of kinetic energy is 1/2 mv^2
Answer:
given
v=5m/s
m=65
kinetic energy=1/2mv²
=1÷2×65×5²
=81.5
an example of using an active solar heating system would be to...
Answers
An example of using an active solar heating system is to heat a residential or commercial building using solar energy.
Active solar heating systems utilize mechanical or electrical devices, such as pumps or fans, to actively collect, store, and distribute solar heat. These systems typically involve the use of solar collectors, which are installed on the roof or other suitable locations to capture sunlight and convert it into usable heat.
Here's how an active solar heating system works:
1. Solar Collectors: The system includes solar collectors, usually made of dark-colored materials or containing tubes with a heat-absorbing fluid. These collectors are designed to absorb the sun's energy and convert it into heat.
2. Heat Transfer: As sunlight strikes the collectors, the absorbed heat is transferred to a fluid circulating within the collectors. This fluid, often a mixture of water and antifreeze, becomes heated by the solar energy.
3. Heat Storage: The heated fluid from the collectors is then transferred to a heat storage system. This can involve a solar storage tank or thermal mass materials like concrete or water tanks that can store the heat for later use.
4. Distribution: When heat is required, the stored thermal energy is transferred to the building's heating system. This can be achieved through a heat exchanger, where the heat from the solar system is used to warm the air or water that is circulated throughout the building.
5. Backup Systems: In some cases, active solar heating systems may have backup systems like conventional heaters or boilers to provide heat when solar energy is insufficient, such as during periods of low sunlight or high heating demand.
By using an active solar heating system, buildings can take advantage of renewable solar energy to provide space heating, water heating, or both. This helps reduce reliance on fossil fuels and lowers greenhouse gas emissions associated with traditional heating methods.
It's important to note that the design and components of active solar heating systems may vary depending on the specific requirements, climate, and size of the building. However, the fundamental principle remains the same: capturing solar energy, converting it into heat, storing it, and distributing it to fulfill heating needs within the building.
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How was the was wave of the 1800s different from the
Answers
The wave of the 1800s, also known as the Second Great Awakening, was different from the First Great Awakening in several ways. Firstly, the Second Great Awakening was more widespread and lasted longer than the First Great Awakening, which occurred mainly in the mid-1700s and was centered in the New England colonies.
Secondly, the Second Great Awakening was characterized by a greater emphasis on individualism and personal religious experience, with preachers encouraging individuals to seek salvation through personal conversion and the establishment of a personal relationship with God. Thirdly, the Second Great Awakening was marked by a significant increase in the number of new religious denominations, including the Mormons, Seventh-Day Adventists, and the Disciples of Christ. Fourthly, the Second Great Awakening had a greater impact on American society as a whole, contributing to the rise of the abolitionist and women's suffrage movements. In summary, the Second Great Awakening was more widespread, emphasized individualism and personal religious experience, saw the emergence of new religious denominations, and had a greater impact on American society than the First Great Awakening.
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n on
your
27. Base your answer(s) to the following question(s)
on the information below.
A scientist set up an experiment to collect data
about lightning. In one lightning flash, a charge of
25 coulombs was transferred from the base of a
cloud to the ground. The scientist measured a
potential difference of 1.8 x 106 volts between the
cloud and the ground and an average current of
2.0 × 104 amperes.
The scientist was several kilometers from the
lightning flash. Using one or more complete
sentences, explain why the scientist saw the
lightning flash several seconds before he heard the
sound of the thunderclap from that flash.
Answers
Sound travels at a known speed, the time interval between the flash and the thunderclap can be used to calculate the approximate distance to the lightning strike.Light travels at a speed of approximately 299,792 kilometers per second in a vacuum, while sound travels at a much slower speed of around 343 meters per second in dry air at 20 degrees Celsius.
The scientist observed the lightning flash several seconds before hearing the sound of the thunderclap because light travels much faster than sound. Light travels at a speed of approximately 299,792 kilometers per second in a vacuum, while sound travels at a much slower speed of around 343 meters per second in dry air at 20 degrees Celsius.Given that the scientist was several kilometers away from the lightning flash, the light from the flash reached the scientist's location almost instantaneously. In contrast, the sound waves generated by the thunderclap took time to travel through the air over the distance between the scientist and the lightning. Consequently, it took several seconds for the sound to reach the scientist's ears.The time difference between seeing the lightning flash and hearing the thunder allows us to estimate the distance of the lightning strike.
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A materiel that allows electricity to flow easily is called an
Answers
A materiel that allows electricity to flow easily is called an conductor
A vertical cylinder tank (D=1 m, H=2 m) is completely filled with milk (p=1034 kg/m3, u= 2. 12x10-3 kg/m. S) and tank is open to atmosphere. Milk is transferred to another tank with a vertical pipe (L= 5 m, D= 20 cm). If fanning friction factor, f is 0. 01 inside the pipe, calculate the volumetric flow rate at the outlet. 3. Which devices used in the pipeline systems to measure the fluid flow velocity? For small pipelines, which one is more suitable? 4. What are the differences between the packed beds and fluidized beds? Good ucks
Answers
Packed beds involve densely packed solid particles with fluid flow through the void spaces, while fluidized beds involve suspended solid particles behaving like a fluid due to the upward flow of a gas or liquid.
1. To calculate the volumetric flow rate at the outlet, we can use the principle of conservation of mass. The mass flow rate at the inlet and outlet should be the same since the tank is completely filled.
The mass flow rate can be calculated using the equation:
m_dot = rho * A * V
Where m_dot is the mass flow rate, rho is the density of the milk, A is the cross-sectional area of the pipe, and V is the velocity of the milk at the outlet.
First, we need to calculate the cross-sectional area of the pipe. The diameter of the pipe is given as 20 cm, so the radius can be calculated as 10 cm or 0.1 m. Thus, the cross-sectional area is:
A = pi * \(r^2\) = 3.14 *\((0.1)^2\) = 0.0314 \(m^2\)
Next, we need to calculate the velocity of the milk at the outlet. We can use the Darcy-Weisbach equation to calculate the pressure drop in the pipe:
delta_P = f * (L / D) * (rho * \(V^2\)) / 2
Where delta_P is the pressure drop, f is the friction factor, L is the length of the pipe, D is the diameter of the pipe, rho is the density of the milk, and V is the velocity of the milk at the outlet.
Since the tank is open to the atmosphere, the pressure at the outlet is atmospheric pressure. Therefore, the pressure drop is equal to the pressure at the inlet minus the atmospheric pressure:
delta_P = P_inlet - P_atm
Since the tank is completely filled, the pressure at the inlet is given by the hydrostatic pressure:
P_inlet = rho * g * H
Where g is the acceleration due to gravity and H is the height of the milk in the tank.
Rearranging the Darcy-Weisbach equation, we can solve for the velocity:
V = sqrt((2 * delta_P) / (f * rho))
Substituting the values and solving for V:
delta_P = rho * g * H - P_atm
V = sqrt((2 * (rho * g * H - P_atm)) / (f * rho))
Finally, we can calculate the volumetric flow rate using the equation:
Q = A * V
Substituting the values and solving for Q:
Q = 0.0314 * sqrt((2 * (rho * g * H - P_atm)) / (f * rho))
2. The devices used in pipeline systems to measure fluid flow velocity are flow meters. There are several types of flow meters, including electromagnetic flow meters, ultrasonic flow meters, and turbine flow meters.
For small pipelines, an ultrasonic flow meter is more suitable. Ultrasonic flow meters are non-intrusive and do not require cutting or drilling into the pipeline. They are also accurate and can measure flow rates in both directions.
4. Packed beds and fluidized beds are both types of vessels used in chemical processes. The main difference between them lies in the arrangement and behavior of the particles or materials inside the vessel.
In a packed bed, the solid particles are densely packed and do not move freely. They are typically arranged in a fixed pattern or structure. The flow of fluids through a packed bed is characterized by the fluid passing through the void spaces between the solid particles. Packed beds are commonly used for filtration, adsorption, and catalytic reactions.
On the other hand, in a fluidized bed, the solid particles are suspended and behave like a fluid due to the upward flow of a gas or liquid. The fluidization process involves introducing a fluid at a velocity that is sufficient to lift and suspend the solid particles. Fluidized beds are often used for mixing, drying, and chemical reactions where high contact between the solid particles and the fluid is desired.
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5. Michael wanted to see what kitchen cleaner worked best for cleaning her counters. He used Lysol, Clorox, Pine-sol, and just water. For each cleaner, he put 5 milliliters of grape juice on the counter, sprayed the cleaner, and wiped it with one paper towel.
Answers
Answer:
Michael wanted to see what kitchen cleaner worked best for cleaning his counters. He used Lysol, Clorox, Pine-Sol, and water. For each cleaner, he used 5 milliliters of grape juice on the counter, sprayed the cleaner, and wiped it with one paper towel. Which of the following would be a constant?
answer choices:
-Lysol
-Cleaning products
-5 milliliters of grape juice
-Cleanest countertop recorded
5 milliliters of grape juice will be constant.
Explanation:
The different cleaning agents have different cleaning capabilities and some will require more of its quantity than others to clean the counter.
Secondly, only the grape juice has a measured amount of 5 milliliters
10. Which of the following is an electrical insulator?
A. a penny
B. a bike chain
C. a tree
D. a gold tooth
Answers
Answer:
c
Explanation:
every other option is a conductor
Determine the image distance and image height for a 5.00 cm tall object placed 45.0 cm from a double convex lens with a focal length of 15.0 cm.
Answers
Given,
object distance = Given that, an object placed 45.0 cm from a convex lens having a focal length of 15.0 cm
and the height of the image is 5.0 cm
we know,
\(\begin{gathered} \frac{1}{f}=\frac{1}{v}-\frac{1}{u}\frac{}{} \\ \\ \frac{1}{15}=\frac{1}{v}-\frac{1}{-45} \\ \\ \frac{1}{v}=\frac{1}{15}-\frac{1}{45} \\ \\ \frac{1}{v}=\frac{2}{45} \\ \\ \therefore\text{ v=22.5cm} \end{gathered}\)we know,
\(\begin{gathered} \frac{h_i}{h_o}=\frac{v}{u} \\ \\ \frac{\begin{equation*}h_i\end{equation*}}{5}=\frac{22.5}{-45} \\ \\ h_i=-2.5cm \end{gathered}\)result,
image distance = 22.5cm towards right side of convex lens .
image height=2.5cm, {Enlarged and inverted}
Light emitted by element X passes through a diffraction grating having 1200 lines/mm. The diffraction pattern is observed on a screen 75.0 cm behind the grating. Bright fringes are seen on the sceen at distances of 56.2 cm,65.9 cm, and 93.5 cm from the central maximum.
What are wavelegths of light emitted by the unknown element?
Answers
The wavelengths of light emitted by the unknown element are approximately 475 nm, 555 nm, and 790 nm.
To determine the wavelengths of light emitted by the unknown element, we can use the formula for the interference pattern produced by a diffraction grating:
d * sinθ = m * λ
- d is the spacing between the grating lines (in this case, 1/1200 mm or 0.00125 mm)
- θ is the angle of the diffracted light
- m is the order of the bright fringe
- λ is the wavelength of the light
In this problem, the bright fringes are observed at distances of 56.2 cm, 65.9 cm, and 93.5 cm from the central maximum. We can use these distances to calculate the angles of diffraction.
θ = tan^(-1)(y / L)
- y is the distance from the central maximum to the observed bright fringe (in this case, 56.2 cm, 65.9 cm, and 93.5 cm)
- L is the distance between the grating and the screen (in this case, 75.0 cm)
Using these angles of diffraction, we can solve the equation for each observed bright fringe to find the corresponding wavelengths of light emitted by the unknown element.
For the first bright fringe (m = 1):
0.00125 mm * sin(θ₁) = 1 * λ₁
sin(θ₁) = λ₁ / 0.00125
For the second bright fringe (m = 2):
0.00125 mm * sin(θ₂) = 2 * λ₂
sin(θ₂) = 2 * λ₂ / 0.00125
For the third bright fringe (m = 3):
0.00125 mm * sin(θ₃) = 3 * λ₃
sin(θ₃) = 3 * λ₃ / 0.00125
We can use the trigonometric identities sin(θ) = sin(π - θ) and sin(θ) = sin(2π - θ) to find the angles θ₁, θ₂, and θ₃.
Finally, using the values of sin(θ₁), sin(θ₂), and sin(θ₃) obtained from the equations above, we can solve for the corresponding wavelengths λ₁, λ₂, and λ₃.
The resulting wavelengths of light emitted by the unknown element are approximately 475 nm, 555 nm, and 790 nm.
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I am really confused can someone please help and explain.
Answers
B
They store the radioactive waste in pools of water until it is no longer dangerous. It is then transferred to a dry cask. :))
3. Reducing the distance between two objects to 1/2 its original value will
a. Make the gravitational force between the objects twice its original value,
B. Make the gravitational force between the objects 1/4 of its original value,
C) Make the gravitational force between the objects 4 times its original value,
D. Make the gravitational force between the objects of its 1/2 original value,
Answers
Answer:
i my though may it is auestion no B i am not correct may its write
Explanation:
B
1. In which scenario is the force
of gravity the strongest
between the two objects?
Explain.
2. If the objects in scenario B
represent planets, on which
planet would you weigh less?
Use the terms, mass, weight,
and gravity in your answer.
Answers
Answer:
B
Explanation:
A would mean that the two heavier objects would slowly join together.
C would mean that the two objects may not be close enough together.
B the object is at a decent distance and the smaller onject because it contains a smaller mass and therfore would be lighter, would basically fly at the larger object.
I hope that makes sense. My brain and explanations are a bit different lol.
Children on the autism spectrum are at risk for nutritional deficiencies because?
Answers
Explanation: Research highlights the individuals with ASDS are nutritionally vulnerable because they exhibit a selective or pick eating pattern and sensory sensitivity that predisposes them to restricted intakes.
I hope this helps!
a traveller covers 1.2km distance in 5mins find it's average velocity
Answers
Explanation:
Average Velocity = Displacement / Time
= 1.2km / 5 min
= 1200m / 300s
= 4m/s.
The average velocity of a moving body is the distance covered by time. The average velocity of the traveler covers 1.2 km in 5 min is 4 m/s.
What is velocity ?Velocity is a physical quantity which measures the distance travelled per unit time. Velocity is a vector quantity thus having both magnitude and direction.
Velocity is the ratio of distance to the time. Given that the distance travelled by the man = 1.2 km = 1200 m
time = 5 min = (5 × 60 s) = 300 s.
Thus, velocity = distance/ time
= 1200 m / 300 s
= 4 m/s.
Therefore, the velocity of the traveler is 4 m/s.
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A ladybug crawls vertically on a leaf. Its motion is shown on the following graph of vertical position y vs. time t. What is the average speed of the ladybug between the times t=4s and t=7s?
0.67 m/s
0 m/s
-0.67 m/s
1.5 m/s
Answers
Why we need football?
Answers
Answer:
bc we play when we are bored and some people use it as a tradition to play on thanksgiving
is uniform circular motion taking place at a constant speed or constant velocity? why?
Answers
Answer:
The uniform circular motion has a constant speed only but not constant velocity . Because the velocity changes its direction at every point of its path.
Explanation:
just look it up :)
PLEASE HELP IM IN A TEST , ILL GIVE 100 POINTS!! How are visible light, the electromagnetic spectrum, and photoreceptors in the eye related?
A. Photo receptors in the eye detect the electromagnetic spectrum which contains a range known as visible light
B. Photo receptors in the eye detect visible light which is part of the wider electromagnetic spectrum
C. Photo receptors in the eye detect visible light which contains a range known as the electromagnetic spectrum
D. Photo receptors in the eye detect the electromagnetic spectrum which is part of the water visible light range
Answers
Answer:
B. Photo receptors in the eye detect visible light which is part of the wider electromagnetic spectrum
Explanation:
Electromagnetic spectrum is wide and huge and a range in this spectrum (around wavelenght 380 to 700 nanometers) is called visible light spectrum which is the only light that our eyes can see.
Thus photoreceptors in eye detect visible light which is part of bigger spectrum (we CANNOT see the entire electromagnetic spectrum only a small range which is known as visible light spectrum range).
I know the answer but the wording is tricky so I am not sure between A and B. Im sorry if I get it wrong. A sounds sort of right but I would not go with it cuz it says receptors detect electromagnetic spectrum (but we DO NOT detect all of the spectrum only a small portion)
Go with your gut.
A 0.50 kg ball traveling at 6.0 m/s due east collides head on with a 1.00 kg ball traveling in the opposite direction at -12.0 m/s. After the collision, the 0.50 kg ball moves away at -14 m/s. Find the velocity of the second ball after the collision.
Answers
Answer: The velocity of the second ball after the collision is -2 m/s due east.
Explanation:
We can use the law of conservation of momentum to solve this problem. According to this law, the total momentum of a system before a collision is equal to the total momentum of the system after the collision, provided that no external forces act on the system.
The momentum p of an object is given by the product of its mass m and velocity v: p = mv.
Before the collision, the momentum of the system is:
p_initial = m_1 * v_1 + m_2 * v_2
where m_1 and v_1 are the mass and velocity of the first ball, m_2 and v_2 are the mass and velocity of the second ball.
Plugging in the given values, we get:
p_initial = (0.50 kg)(6.0 m/s) + (1.00 kg)(-12.0 m/s) = -6.0 kg*m/s
After the collision, the momentum of the system is:
p_final = m_1 * v'_1 + m_2 * v'_2
where v'_1 and v'_2 are the velocities of the first and second ball after the collision.
We are given that the first ball moves away at -14 m/s after the collision, so:
v'_1 = -14 m/s
We can now use the conservation of momentum to solve for v'_2:
p_initial = p_final
m_1 * v_1 + m_2 * v_2 = m_1 * v'_1 + m_2 * v'_2
Plugging in the given values, we get:
(0.50 kg)(6.0 m/s) + (1.00 kg)(-12.0 m/s) = (0.50 kg)(-14 m/s) + (1.00 kg)(v'_2)
Solving for v'_2, we get:
v'_2 = -2 m/s
Therefore, the velocity of the second ball after the collision is -2 m/s due east.
Military rifles have a mechanism for reducing the recoil forces of the gun on the person firing it. An internal part recoils over a relatively large distance and is stopped by damping mechanisms in the gun. The larger distance reduces the average force needed to stop the internal part. (a) Calculate the recoil velocity of a 1.00-kg plunger that directly interacts with a 0.0200-kg bullet fired at 600 m/s from the gun. (b) If this part is stopped over a distance of 20.0 cm, what average force is exerted upon it by the gun? (c) Compare this to the force exerted on the gun if the bullet is accelerated to its velocity in 10.0 ms (milliseconds).
Answers
A dampening mechanisms in the cannon stops the comparatively long-distance recoil of an internal component. The average force required to halt the internal part is lessened by the greater distance.
What conservation law is the basis for gun recoil?The third law of motion states that there is an equal and opposite reaction to every action. Recoil is a gun's backward momentum used to counteract the bullet's forward momentum.
How does a gun recoil feel? An illustration of momentum conservation?The Law of Conservation of Linear Momentum Has the Following Applications: Gun's Recoil: When a bullet is shot from a gun, it travels forward with a lot of forward velocity. because no external force acts on the system, so the momentum of the system must be zero after firing.
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what is area expansivity
Answers
An increase in area of a solid when heated is called area or superficial expansivity.
lonic compounds form because ______ attract.
Plz help I need this now! :)
Answers
Answer:
I believe it is either Metals or Nonmetals
Explanation:
Hope this helped, Have a Wonderful Day/Night!!
To travel from Earth to the planet Neptune at more than 30,000 mph, the Voyager 2 spacecraft took nearly a) a year b) a decade c) three decades d) a century
Answers
According to the information we can infer that to travel from Earth to the planet Neptune at more than 30,000 mph the Voyager 2 spacecraft took nearly three decades (option C).
How much did the Voyager 2 take to travel from Earth to the planet Neptune?The Voyager 2 spacecraft took nearly three decades to travel from Earth to the planet Neptune at a speed of over 30,000 mph (miles per hour). Voyager 2 was launched by NASA in 1977 and reached Neptune in 1989.
During its journey, the spacecraft passed by and collected valuable data from several other planets, including Jupiter, Saturn, Uranus, and finally Neptune. The long duration of the journey is due to the vast distances involved in interplanetary travel within our solar system.
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A certain light truck can go around a flat curve having a radius of 150 m with a maximum speed of 34.5 m/s. With what maximum speed can it go around a curve having a radius of 60.0 m
Answers
With 20.23 ms⁻¹, maximum speed can it go around a curve having a radius of 60.0 m
What's the maximum speed?The highest rate of speed a person can reach is called maximum speed. When athletes alter the magnitude (how quickly they are moving) or direction (or both) of their motion, or both, their acceleration changes as well since acceleration is related to velocity, which has both a magnitude and a direction connected with it.
ac max = V² max / R ....(1)
Inserting given values we get
ac, max = (34.5)² / 150 = 7.935 ms⁻²
For a changed radius of the curve of 60.0 m, the maximum safe speed from (1) becomes
Unew, max= √ac, max R new
Unew, max = √6.826 x 60
Unew, max 1 = 20.23 ms⁻¹, rounded to one decimal place.
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A naval navigator is using sonar to look for sunken cargo. The waves he is using have a frequency of 120
kHz and a wavelength of 3 mm. How far away is the cargo if the sound wave is emitted at exactly 9:24 a.m.
and returns to hit the ship's sensor 3 seconds later?
Answer should be in meters
Answers
With the use of wave speed and echo formula, the distance is 540 m
What is Echo ?Echo can simply be defined as a reflection of sound wave. Where as, Sound wave is longitudinal wave.
Given that a naval navigator is using sonar to look for sunken cargo. The waves he is using have a frequency of 120 kHz and a wavelength of 3 mm.
The wave speed V = Fλ
Where
V = ?F = 120 KHz = 120,000λ = 3 mm = 0.003 mV = 120000 × 0.003
V = 360 m/s
How far away is the cargo if the sound wave is emitted at exactly 9:24 a.m. and returns to hit the ship's sensor 3 seconds later?
Speed V = 2S/t
where
S = distance ?t = time taken = 3 s360 = (2 × S)/3
360 × 3 = 2S
S = 1080/2
S = 540 m
Therefore, the cargo is 540 m away
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A meteorite is DIFFERENT from a comet mainly because it
A) has a tail of ice and dust.
B) enters the Earth’s atmosphere.
C) has a nucleus made of snow and rock.
Eliminate
D) is found in orbit between Mars and Jupiter.