how deep is the shipwreck if echoes were detected 0.36 s after the sound waves were emitted?

The rest are constructed of bubble wrap, lead, Styrofoam, and one is a pumpkin. The items all arrive at the ground simultaneously; none of the responses are accurate.

Styrofoam is a type of plastic foam that is commonly used for insulation, packaging, and food service products. It is also known as polystyrene foam, which is made from styrene, a synthetic chemical derived from petroleum. Styrofoam is lightweight, durable, and has excellent insulation properties, which makes it ideal for a wide range of applications.

Styrofoam is produced by expanding polystyrene beads with steam and then fusing them together to form a solid block or shape. The resulting material is strong, rigid, and has a closed-cell structure, which makes it resistant to water and moisture. It is also a good insulator, which is why it is commonly used for insulation in buildings and homes. Styrofoam is widely used for packaging materials due to its lightweight, low cost, and ease of use. It is also used for disposable food containers, cups, and plates.

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Complete Question:-

Imagine that you are standing on the (airless) Moon, and you drop four objects, each the size of a bowling ball. Each is made of a different substance. One object is a pumpkin, and the others are made of Styrofoam, lead, or bubble wrap. In what order do they reach the ground?

a. lead, bubble wrap, pumpkin, styrofoam

b. none of the answers is correct; the objects all reach the ground at the same time.

c. lead, pumpkin, bubble wrap, styrofoam

d. pumpkin, styrofoam, lead, bubble wrap

The  statement that adding yeast to a new septic tank speeds up digestion by a factor of 2.7 is not true.

Adding yeast to a new septic tank is not likely to speed up digestion, as the primary function of yeast is to ferment sugars into alcohol and carbon dioxide, rather than to break down waste materials. In fact, adding yeast to a septic tank may disrupt the natural balance of bacteria and other microorganisms that are responsible for breaking down and processing the waste.

The process of digestion in a septic tank is primarily carried out by anaerobic bacteria, which break down organic matter in the absence of oxygen. The rate of digestion depends on a variety of factors, including the size and design of the tank, the nature and amount of waste materials being processed, and the temperature and pH of the tank environment.

Therefore, the statement that adding yeast to a new septic tank speeds up digestion by a factor of 2.7 is not true.

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Answer:

Heat

Explanation:

Because chemical energy is stored, it is a form of potential energy. When a chemical reaction takes place, the stored chemical energy is released. Heat is often produced as a by-product of a chemical reaction – this is called an exothermic reaction.

Hope this helped.

Explanation:

Answer Should be B.

Its in Form of Heat.

Among these statements, the true statement concerning court cases about discrimination is that in the University of Michigan cases (Grotz and Grutter), the Supreme Court upheld moderate, flexible affirmative action programs.What is discrimination?

Discrimination refers to the unjust or biased treatment of individuals or groups based on differences in certain characteristics or traits. Discrimination can be experienced based on race, ethnicity, gender, religion, age, or disability, among other factors.

Court cases about discrimination there are several court cases about discrimination. Among these, the statement that is true is that in the University of Michigan cases (Grotz and Grutter), the Supreme Court upheld moderate, flexible affirmative action programs. The Supreme Court upheld affirmative action and rejected the notion of quotas in the admissions process. The court ruled that affirmative action is lawful as long as it was utilized as a flexible method to attain diversity, but not as a means to achieve a particular racial balance.

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It will form igneous rocks.

The correct response is therefore option D, "form igneous rocks."

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The arrangement of the photons based on the decreasing number of photons in each beam is; gamma ray >  x-ray > green light > yellow light > AMradio wave > FM Radio wave.

The term electromagnetic radiation refers to those rays that do not require a medium of propagation. That is, the are travel through vaccum. We must note that the greater the frequency of the wave, the greater the number of photons.

Hence, the arrangement of the photons based on the decreasing number of photons in each beam is; gamma ray >  x-ray > green light > yellow light > AMradio wave > FM Radio wave.

Missing parts;

Beams of different frequency electromagneticradiation are listed below. Each beam has the same total energy.Rank these beams on the number of photons in each beam. green light, FM Radio wave, x-ray, yellow light, gamma ray, AMradio wave

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Answer:

Explanation:

\(Average- velocity = \frac{displacement }{time} \\A.V = \frac{100}{5} \\A.V = 20\)

Answer:

8km/h

Explanation:

Time=8:30 - 7:00 = 1.5 hours

Distance = 12 km

Speed = Distance / Time

=12/1.5

=8 km/h

water is not found in the periodic table.

water has a lot of empty space.

I think that's it I know those to are true.

The statements that are true about water are as followings,

Water does not appear on the periodic table of elements.

Water molecules contain a lot of empty space.

Hydrogen and oxygen have different properties when separated.

Therefore the correct options are options B, C, and E.

A chemical compound is a combination of two or more either similar or dissimilar chemical elements.

For example, H₂O is a chemical compound made up of two oxygen atoms and a single hydrogen atom.

The periodic table contains only elements therefore water cannot be found on the periodic table , oxygen and hydrogen would have different properties when separated.

Thus , the correct options are B, C, and E.

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Answer:

b

Explanation:because think about it its going straight so you have to coiunt the miles the train is going and boom your answer is b

Answer:

It would be choice b

Explanation:

speed is constant so they value won't change, on the other hand time is always going.

Objects have the same velocity only if they are moving at the same speed and in the same direction.

Objects moving at different speeds, in different directions, or both have different velocities.

When two bodies are moving in opposite directions, relative velocity between them is equal to sum of the velocity of bodies.

But if the bodies are moving in same direction their relative velocity is equal to difference in velocity of the bodies.

Relative velocity is defined as the velocity of an object B in the rest frame of another object A. 2) A motorcycle travelling on the highway at a velocity of 120 km/h passes a car travelling at a velocity of 90 km/h.

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The system described by the transfer function G(s) = -co² s² + 2a + w², with a damping ratio of 1.3 and a natural frequency of 0.5, has an overdamped unit step response. So, the correct option is (E)

The transfer function of the system is given as G(s) = -co² s² + 2a + w², where co represents the damping ratio, a represents an arbitrary constant, and w represents the natural frequency of the system. We are given that the natural frequency is 0.5 and the damping ratio is 1.3.

To determine the type of unit step response, we need to analyze the damping ratio (co) in relation to the critical damping value (co_critical).

The critical damping ratio (co_critical) is defined as the value where the system is on the threshold between being overdamped and underdamped. It is given by the formula co_critical = 2 * sqrt(a * w²).

In our case, the natural frequency (w) is 0.5, so we can calculate co_critical as follows: co_critical = 2 * sqrt(a * 0.5²).

Since the damping ratio (co) is given as 1.3, we can compare it with co_critical to determine the type of unit step response.

If co > co_critical, the system is considered overdamped (Option E).

If co = co_critical, the system is considered critically damped (Option D).

If co < co_critical, the system is considered underdamped (Option C).

Based on the given values, we can determine that the system is overdamped (Option E) because the damping ratio (1.3) is greater than the critical damping ratio.

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(a) The work function is 7.5(10)¹⁴ Hz.

(b) The kinetic energy of photoelectron is - 1.898 eV

The photoelectric effect consists of the emission of electrons (electric current) that occurs when light falls on a metal surface under certain conditions.  

If the light is a stream of photons and each of them has energy, this energy is able to pull an electron out of the crystalline lattice of the metal and communicate, in addition, a kinetic energy.  

This is what Einstein proposed:  

Light behaves like a stream of particles called photons with an energy  

E = h.ν ----- eq1

So, the energy E  of the incident photon must be equal to the sum of the Work function  Φ of the metal and the kinetic energy K of the photoelectron:  

E = Φ + K ----- eq2

Where Φ is the minimum amount of energy required to induce the photoemission of electrons from the surface of a metal, and its value depends on the surface.  

In case, Φ = 5eV

So, applying equation (1) in this problem:  

E = hν

Where:

h = 4.136(10)⁻¹⁵ eV is Planck constant

ν is the frequency

Now the frequency has an inverse relation with the wavelength

λ = 400(10)⁻⁹ m

ν = c/λ

Being c = 3(10)⁸ m/s is the speed of light in vacuum.

ν = 7.5(10)¹⁴ Hz.

Substituting,

E = 4.136(10)⁻¹⁵ {7.5(10)⁻¹⁰}

E = 3.1 eV

Now,

3.1 eV = 5 ev + K

K = - 1.898 eV

Since a negative kinetic energy is not physically possible, the only explanation is: the conditions for a photoelectric effect were not met, hence the photoelectric effect cannot occur.

Therefore, the main condition for the occurrence of the photoelectric effect is that the energy incident photon  must be greater than the work function and E > Φ

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Two workers are sliding 330 kg crate across the floor. The crate's coefficient of kinetic friction on the floor is 0.197.

The proportion of friction force to normal force is known as the coefficient of friction, a dimensionless number.

\(F_f = \mu F_n\)

\(F_f\) = frictional force

\(\mu\) = coefficient of kinetic friction

\(F_n\) = normal force

\(\mu = \frac{F_1 + F_2}{mg}\)

m = mass

g = acceleration due to gravity

To calculate the coefficient of friction use above equations :

μ = (430 + 210)/(330 x 9.8)

μ = 640 /3234

μ = 0.197

Two workers are sliding 330 kg crate across the floor. The crate's coefficient of kinetic friction on the floor is 0.197.

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The wavelength of the first line of the Balmer series in the visible spectrum is approximately 656.3 nm, and the corresponding frequency is approximately 4.57 × 10^14 Hz

The Balmer series is a set of spectral lines in the emission spectrum of hydrogen atoms. The formula for calculating the wavelength of the Balmer series lines is given by: 1/λ = R_H * (1/2^2 - 1/n^2)

Where:

λ is the wavelength of the spectral line

R_H is the Rydberg constant for hydrogen (approximately 1.097 × 10^7 m^-1)

n is the principal quantum number of the energy level

For the first line of the Balmer series, we take n = 2.

Calculating the wavelength:

1/λ = R_H * (1/2^2 - 1/2^2) = R_H * (1/4 - 1/4) = 0

λ = 1/0 = undefined

However, if we consider the Balmer series to be limited to the visible part of the spectrum, we can approximate the wavelength of the first line as 656.3 nm.

Calculating the frequency:

The speed of light (c) is approximately 3.0 × 10^8 m/s. We can use the equation:c = λ * f

where:

c is the speed of light

λ is the wavelength

f is the frequency

Converting the wavelength to meters:

656.3 nm = 656.3 × 10^-9 m

Solving for frequency:

f = c / λ = (3.0 × 10^8 m/s) / (656.3 × 10^-9 m)

f ≈ 4.57 × 10^14 Hz

The wavelength of the first line of the Balmer series in the visible part of the spectrum is approximately 656.3 nm, and the corresponding frequency is approximately 4.57 × 10^14 Hz.

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The energy per photon associated with a frequency of 1260 kHz is 2.10×10^-25 J.

To calculate the energy per photon, we can use the equation: E = hf, where E represents the energy, h is the Planck's constant (6.62607015 × 10^-34 J·s), and f is the frequency of the photon. Given that the frequency is 1260 kHz, we need to convert it to hertz (Hz) by multiplying it by 10^3:

Frequency = 1260 kHz × 10^3 = 1.26 × 10^6 Hz

Now, we can substitute the values into the equation:

E = (6.62607015 × 10^-34 J·s) × (1.26 × 10^6 Hz)

E = 8.33929859 × 10^-28 J

The answer is given in scientific notation as 8.34 × 10^-28 J. However, the question specifically asks for the answer in the format of 0.00×10^0. To achieve this, we can multiply the result by 10^3 and adjust the exponent accordingly:

E = (8.33929859 × 10^-28 J) × (10^3)

E = 8.33929859 × 10^-25 J

Thus, the energy per photon associated with a frequency of 1260 kHz is 2.10×10^-25 J.

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The angular size of the Moon from the Earth is 0.009022 radians, and to produce the same angular diameter a penny of 19 mm diameter should be placed at 2.1 m from the eye.

To find the angular size in radians of the Moon as seen from Earth, we can use the formula:

angular size = diameter / distance

Plugging in the values given, we get:

angular size = 3476 km / 384,400 km

Simplifying, we get:

angular size = 0.009042 radians

To find the distance at which a penny should be held to produce the same angular diameter as the Moon, we can use the same formula and set the angular size equal to each other:

the angular size of penny = diameter of penny / distance

Plugging in the values given for the penny, we get:

0.009022 radians = 19 mm / distance

Solving for distance, we get:

distance = 19 mm / 0.009042 radians

Simplifying, we get:

distance = 2101 mm or 2.1 meters (rounded to one decimal place)

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Answer:

True Edg2020

Explanation:

Answer: true

Explanation:

because I say so :P

Answer:

The final velocity of the bullet is approximately 3.795 m/s

Explanation:

The given parameters are;

The mass of the bullet, m = 5.0 g

The force applied to the bullet, F = 45 N

The distance over which the force is applied, d = 0.80 m

Therefore, we have;

The final kinetic energy of the bullet = = 1/2 × m × v² = The work done on the bullet by the 45 N force = F × d

Where;

v = The final velocity of the bullet

By substitution, we get;

The final kinetic energy of the bullet = 1/2 × 5.0 × v² = 45 × 0.8

1/2 × 5.0 × v² = 45 × 0.8

v² = (45 × 0.8)/(1/2 × 5.0) = 14.4

v = √14.4 ≈ 3.795

The final velocity of the bullet = v ≈ 3.795 m/s

speed is 275 feet per second 275×60 = 16500 ft. 16500×Sin15° = 4270.51 ft (app.)

answer is 4270.51

How do you determine an airplane's speed?

the Mach Number.

Formula:

Mach Number = Sound Speed / Aircraft Speed (dependent on altitude)

Example:

The speed of sound at 30,000 feet is equal to 589.4 knots as the aircraft flies. There are 489.3 knots of airspeed.

Calculate: 0.83 Mach = 489.3/589.5.

How is the distance climbed determined?

We can determine the horizontal distance we will cover throughout the ascent given that we know how long it will take:

Ground speed multiplied by climbing time equals horizontal distance.

Using the previous formulas:

rise in altitude = 4000 - 1000 = 3000 ft.

3000 divided by 600 equals 5 minutes for the ascent.

10 NM is the horizontal distance at 120 * 5/60.

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Answer:

juuhu

Explanation:

jjj

Answer:

In general, a scientific law is the description of an observed phenomenon. It doesn't explain why the phenomenon exists or what causes it. The explanation of a phenomenon is called a scientific theory. It is a misconception that theories turn into laws with enough research.

Explanation:

hope you get it right

  :)

Answer: Found this in google. Statement based on repeated experiments or observations, that describe or predict a range of natural phenomena. Hope this helps!

Explanation:

When the string is in position b in a standing wave mode, the instantaneous velocity of points along the string is zero.

In a standing wave, the string oscillates between two extreme positions, labeled as a and b. These positions are called nodes, where the displacement of the string is zero. At these nodes, the string reaches its maximum displacement in opposite directions. When the string is at position b, it is at one of the nodes. At a node, the string does not have any motion in the vertical direction. Therefore, the instantaneous velocity of points along the string at position b is zero. This means that the points on the string at position b are momentarily at rest before changing direction and moving towards position a. The velocity of the points on the string varies sinusoidally along the length of the string as it vibrates in a standing wave mode. At the nodes, such as position b, the velocity is zero, while at the antinodes (positions of maximum displacement), the velocity is at its maximum.

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During your class stretching, you performed:

1.  you performed warm-ups before stretching

2. you stretched the neck and shoulders

3. you held your breath

4. you performed only static stretches

5 some exercises involved moving from one position to another

Warm-ups before stretching: It's a good practice to perform a few minutes of low intensity activities such as jogging in place or riding a stationary bike before stretching. This helps to increase blood flow and body temperature, which can make the muscles more pliable and less likely to be injured during stretching.

Therefore, Stretching the neck and shoulders: The neck and shoulders are common areas of tension and tightness, and stretching these areas can help to release tension and improve range of motion.

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Answer:

The resultant velocity is 86.1 mi/h.    

Explanation:

The law of cosines is given by:

\( c^{2} = a^{2} + b^{2} - 2abcos(\theta) \)

Where:

c: is the resultant velocity =?

a: is the velocity of the plane = 75.0 mi/h

b: is the velocity of the wind = 15.0 mi/h  

θ: is the angle between "a" and "b"                          

The angle between "a" and "b" can be found as follows:

\( \theta = 180.0 - 46.0 = 134.0 ^{\circ} \)

Now, by using the law of cosines we have:

\( c^{2} = (75.0)^{2} + (15.0)^{2} - 2*75.0*15.0*cos(134.0) = 7413.0 \)

\( c = 86.1 mi/h \)    

Therefore, the resultant velocity is 86.1 mi/h.    

The law of sines is:

\( \frac{a}{sin(\gamma)} = \frac{b}{sin(\alpha)} = \frac{c}{sin(\theta)} \)

Where:

γ: is the angle between "b" and "c"

α: is the angle between "a" and "c"

So, if we want to find "c" by using the law of sines, we need to know another angle besides θ (γ or α), and the statement does not give us.

I hope it helps you!        

Answer:

a) -1.25 m/s²

b) 62.5 m

Explanation:

Convert km/h to m/s:

45 km/h × (1000 m/km) × (1 h / 3600 s) = 12.5 m/s

a = Δv / Δt

a = (0 m/s − 12.5 m/s) / 10 s

a = -1.25 m/s²

Δx = ½ (v + v₀) t

Δx = ½ (0 m/s + 12.5 m/s) (10 s)

Δx = 62.5 m

The given amplifier circuit is a common-source amplifier. The equivalent circuit diagram of the amplifier includes a MOSFET N5486 transistor. We can determine the drain current (ID) and drain-source voltage (VDS) using the following equations:

1. Voltage at the source terminal (VS) is calculated using Ohm's law: VS = IS x RS.2. The drain current (ID) can be calculated using the equation ID = IS (1 + GVin), where Vin is the input voltage, G is the voltage gain, and IS is the current flowing through RD.Let's calculate the values of ID and VDS:

Given:- IS = VDD / RD = 10V / 10Ω = 1A- Vin = -1V / (1.5 x 10^6Ω + 0.47μF) = -0.6666667μA (using voltage divider rule)- G = -RD / RS = -10Ω / 3kΩ = -0.003333 Calculating ID:ID = 1A (1 - 0.003333 x 0.6666667 x 10^6)≈ 0.997A = 997mACalculating VDS:VDS = VDD - IDRD= 10V - 997mA x 10Ω≈ 10V - 9.97V≈ 0.03VTherefore, the values of ID and VDS are approximately ID = 997mA and VDS ≈ 0.03V, respectively.

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Answer:

Low thermal conductivity

Explanation:

Probably wood have low thermal conductivity compared with metals,marble,glass and concrete

because electricity can not flow in wood. So no heat would be generated.

The landmark is the Leaning Tower of Pisa in Italy. Galileo used the tower to test his theory that the speed of descent was independent of an object's mass by dropping two spheres of different masses from the top.

The landmark that took nearly 200 years to build and was used by Galileo to test his theory that the speed of descent was independent of an object's mass is the Leaning Tower of Pisa, located in Pisa, Italy.

In the late 16th century, Galileo is said to have dropped two spheres of different masses from the top of the tower to demonstrate that they hit the ground at the same time, thereby challenging the Aristotelian view that heavier objects fall faster than lighter ones. This experiment is often cited as a key moment in the history of physics and the scientific method.

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The two subfields of psychology that are similar and involve diagnosing and treating mental disorders are Clinical psychology and the Counseling psychology. Therefore, the correct answer is:  C).

Clinical psychology and Counseling psychology. Both of these subfields involve the assessment, diagnosis, and treatment of mental health disorders, although they may differ in their focus and approach. Clinical psychology tends to the focus on more severe mental health issues, such as schizophrenia and the bipolar disorder, while Counseling psychology tends to focus on a wider range of issues, such as stress management, relationship problems, and career counseling. Hence correct answer is : C) .

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