thinking back to chapter 8, a tidal wave is which wave type?

Answer:

I want to say decomposers, because they break down plants that the herbivores eat, and they can also decompose the remains of a scavenger, herbivore, OR carnivore, that was killed and eaten by a carnivore, and maybe even found and eaten by a scavenger. I'm sorry if it's not correct, that's just what my brain has decided right now

Answer:

The answer is number 4. Decomposers

Explanation:

Hope this helps!!

When the amplitude of a sound wave is changed, the loudness or intensity of the sound will change, but the pitch and frequency of the sound will remain the same.

The amplitude of a sound wave refers to the maximum displacement of the particles of the medium through which the sound is traveling. It is a measure of the energy of the sound wave.

When the amplitude is increased, more energy is present in the wave, and the sound is perceived as being louder. Conversely, when the amplitude is decreased, less energy is present in the wave, and the sound is perceived as being quieter.

It's important to note that the amplitude of a sound wave is also related to the sound pressure level (SPL) which is measured in decibels (dB), an increase in amplitude leads to an increase in SPL and vice versa.

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Joules can be converted into electron Volts (eV) by using the formula E = qV, where E is the energy in joules, q is the charge of an electron, and V is the potential difference in volts.

The charge of an electron is 1.602 × 10^-19 coulombs, so the formula can be rewritten as E = (1.602 × 10^-19) V. To convert joules into electron volts, we simply divide the energy in joules by the charge of an electron.

Here is a step-by-step explanation of how to convert joules into electron volts:
Step 1: Find the energy in joules that you want to convert into electron volts.
Step 2: Divide the energy in joules by the charge of an electron (1.602 × 10^-19 coulombs) to get the energy in electron volts.
Step 3: The result you get is the energy in electron volts.

For example, if you have an energy of 1 joule and want to convert it into electron volts, you would do the following:
1 joule / (1.602 × 10^-19 coulombs) = 6.241 × 10^18 electron volts
So, 1 joule is equivalent to 6.241 × 10^18 electron volts.

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The speed of the boat is 4 m/s.

The system for pace is speed = distance ÷ time.

To work out what the devices are for pace, you want to understand the gadgets for distance and time. In this case, distance is in meters (m) and time is in seconds (s), so the gadgets could be in meters according to second (m/s).

To resolve for speed or price use the components for pace, s = d/t which means that pace equals distance divided through time.

The pace is a manner of measuring how quickly something is transferring or being performed, or something moving speedily. An example of speed is a vehicle being driven 45 miles in keeping with the hour. An instance of velocity is a person cleaning a room in 10 minutes. An example of velocity is how quickly a jaguar runs.

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Answer:

It's A

Explanation:

Because I know it is

The record in the last row should be 2LiCl + 3O2.

A chemical reaction equation has two parts;

The interaction between the atoms of the reactants lead to rearrangement hence products are formed.

For the reaction, the record in the last row should be 2LiCl + 3O2.

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Answer:gravity

Explanation:

gravity holds the planets in its orbit

Answer:

Newton's first law is called the law of inertia.

Explanation:

It helps determine the quantity and quality of water at different locations. this statement best describes a use of the watershed model. Hence option C is correct.

A watershed model is a conceptualised simplification of many water-related anthropogenic and natural events. Examples include the hydrological cycle, which can be roughly predicted by a hydrological model; river flow dynamics,

This can be modelled by a hydraulic/hydrodynamic model; groundwater systems, which can be modelled by a groundwater model; basin level planning, which can be carried out using a water planning model; and hydropower production and energy planning, which can be characterised by a hydropower model.

Depending on the data that is available and the purposes for which it will be used, watershed models have several fundamental forms, structures, features, and capabilities.

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.

Answer:

- The force that magnet B pulls on the magnet A is equal to the force that magnet A pull on B. That is , 100N.

-   F'B = 25N

Explanation:

- You have that the magnet A pulls on the magnet B with a force of 100N.

By the third Newton law you have that any force has a reaction, that is, the force that magnet B pulls on the magnet A is equal to the force that magnet A pull on B. That is , 100N.

-  In order to calculate the force, if the distance between magnets is twice, you first take into account that the magnetic force is inversely proportional to the force between magnets, as follow:

\(F_B\ \alpha\ \frac{1}{r^2}\)     (1)

FB: magnetic force between the magnets = 100N

If the distance is twice, you obtain:

\(F_B'\ \alpha\ \frac{1}{(2r)^2}=\frac{1}{4r^2}\\\\F_B'\ \alpha\ \frac{1}{4}F_B\)

The new force is a quarter of the initial force, that is:

\(F_B'=\frac{1}{4}(100N)=25N\)

If the distance is twice the force is a quarter of the initial force.

Answer:

first answer is 70 newtons the second answer is f = 250N

(a) 3.2 x 10²s

(b) 0.9 m/s (S 13 E)

(c) 2.9 x 10²m

The sketch illustrating the scenario has been attached to this response.

As shown;

The fish swims due east with a velocity \(V_{x}\) = 0.2m/s

The river current has a velocity \(V_{y}\) due South = 0.9m/s

The resultant of the velocity is V

The width of the river is x = 64m

(a) To calculate how long it took the fish to get across the river, we know that velocity is the rate of change in distance, therefore we can use the relation;

V = \(\frac{d}{t}\)      -------------(i)

Where;

V = velocity of the fish = \(V_{x}\) = 0.2m/s

d = distance from the start to the end = width of the river = x = 64m

t = time taken to move for that distance

Make t subject of the formula in equation (i);

t = \(\frac{d}{V}\)

Substitute the values of d and V into the equation;

t = \(\frac{64m}{0.2m/s}\)

t = 320 s

t = 3.20 x 10²s

Therefore, the time taken for the fish to get across the river is 3.20 x 10²s

(b) The resulting vector of the fish is V whose magnitude is the algebraic sum of vectors  \(V_{x}\) and  \(V_{y}\), and direction is given by θ. i.e

The magnitude of the resulting vector is;

|V| = \(\sqrt{(V_x)^2 + (V_y)^2}\)

|V| = \(\sqrt{(0.2)^2 + (0.9)^2}\)

|V| = \(\sqrt{(0.04) + (0.81)}\)

|V| = \(\sqrt{(0.85)}\)

|V| = 0.92m/s

|V| ≅ 0.9m/s

The direction of the resulting vector θ and is given by;

tan θ = \(\frac{V_y}{V_x}\)

tan θ = \(\frac{0.9}{0.2}\)

tan θ = 4.5

θ = tan⁻¹ ( 4.5)

θ = 77.47° South of East.

θ  ≈ 77.5° South of East.

Subtracting θ = 77.5° from 90° gives its value East of South

i.e

90 - 77.5 = 12.5° East of South

This can also be written as S12.5°E

Approximating to the nearest whole number gives S 13 E

Therefore, the resulting velocity of the fish is 0.9m/s in the direction S13°E

(c) When the fish arrives on the opposite bank, its distance from being at the point directly across from where it started is the product of the velocity of the river current and the time taken by the fish to get across the river. This point is equivalent to k as shown in the diagram.

Therefore;

distance = velocity of river current x time taken

distance = 0.9m/s x 3.20 x 10²s

distance = 2.88 x 10²m

distance ≅ 2.9 x 10²m

Notice that the velocity of the river current is used since that's the velocity of the fish on the y-axis.

The three main approaches to the identification of unknown bacteria are as follows:Phenotypic identification, Molecular identification and Biochemical identification

1. Phenotypic identification

Phenotypic identification involves the physical and chemical characteristics of the bacterial colonies and cells. In this method, bacterial cells are studied through microscopy, their ability to grow on various types of media, cellular morphology, and other factors that are easy to observe.

2. Biochemical identification

Biochemical identification is based on the biochemical reactions of bacteria. This method involves the use of different chemical and biochemical tests to identify the bacteria. The tests are designed to identify specific enzymes or metabolic pathways. The results of the tests are then used to identify the bacteria.

3. Molecular identification

Molecular identification involves the use of DNA analysis to identify bacteria. In this method, the DNA of the bacterial cells is isolated and analyzed. This method has become popular in recent years due to its accuracy and speed.

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Answer:

\( { \tt{velocity = \frac{distance}{time}}} \\ \\ { \tt{velocity = \frac{2750}{10.5} }} \\ = { \tt{261.9 \: {ms}^{ - 1} }}\)

Part A: The sound intensity level is 100 dB.

Part B: The rate at which the sound intensity level is increasing can be calculated using the chain rule and the relationship between logarithms.

Part A: The sound intensity level is a logarithmic measure of the sound intensity relative to a reference level. In this case, the sound intensity is 100 W and we need to calculate the sound intensity level in dB. The formula for sound intensity level in dB is given by L = 10 * log10(I/I0), where I is the sound intensity and I0 is the reference intensity. Assuming a standard reference intensity of 10^(-12) W/m^2, we can calculate the sound intensity level as L = 10 * log10(100/10^(-12)) = 100 dB.

Part B: To calculate the rate at which the sound intensity level is increasing, we need to differentiate the sound intensity level equation with respect to time. Using the chain rule and the relationship log10x = ln(x)/ln(10), we can express the rate of change of sound intensity level (dL/dt) as (dL/dt) = (10/ln(10)) * (d/dt) * ln(I/I0). However, the given information does not provide the rate at which the sound intensity changes over time, so it is not possible to determine the exact value of (dL/dt) without additional information.

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A river has a steady speed of 0.250 m/s. a student swims upstream a distance of 1.80 km and swims back to the starting point. if the student can swim at a speed of 1.40 m/s in still water, 3.13 hour long does the trip take.

The speed of the student in the river is the difference between their speed in still water and the speed of the river while going upstream. Therefore, the speed of the student in the river is 1.40 m/s - 0.250 m/s = 1.15 m/s.

The total distance that the student swims is 1.80 km x 2 = 3.60 km.

The time it takes the student to swim this distance is

= 3.60 km / 1.15 m/s

= <<3.6/1.15=3.13>>3.13 hours.

Therefore, the time trip will take is 3.13 hours.

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The magnitude of the net magnetic force that the straight wire ab exerts on the loop is directly proportional to the length of the wire and inversely proportional to the distance between the wire and the loop.

The magnetic force exerted by a current-carrying wire on another current-carrying loop can be calculated using the formula F = BIL, where F is the force, B is the magnetic field, I is the current, and L is the length of the wire or loop.

In this case, the magnetic field produced by the straight wire ab at a distance r from the wire is given by the formula B = μ₀I/2πr, where μ₀ is the permeability of free space. The magnetic field is perpendicular to the plane of the rectangular loop.

Using the right-hand rule, we can determine that the direction of the magnetic force on the loop is upward. The length of the wire ab that contributes to the force is equal to the length of the loop, which we'll call L.

Plugging in the values, we get:
F = (μ₀I1I2L)/(2πd) = (4π x 10⁻⁷ N/A²)(14.0 A)(5.00 A)(L)/(2πd)

Simplifying, we get:
F = (7 x 10⁻⁶ N)(L/d)

Therefore, the magnitude of the net magnetic force that the straight wire ab exerts on the loop is directly proportional to the length of the wire and inversely proportional to the distance between the wire and the loop.

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Kettles heated on stoves are used to be made up of copper. This is because copper is a good conductor of heat and electricity.

Copper is used in making kettles. This is because copper is an excellent choice for a tea kettle as it is an excellent conductor of heat and electricity. This means that copper heats up quickly and evenly, making it ideal for the purpose of boiling water and preparing tea. Copper is also a durable material which can last for many years with proper care.

Copper kettles are polished from the outer surface as it is subject to corrosion that is caused by salts and sulfates. If the kettles are not cleaned completely, this corrosion, even as a slight film, will affect the taste of what is prepared in that copper kettle, giving a metallic sensation to taste.

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To determine if the second-order response surface is identical for each level of engine type, a comparative test can be conducted.

In this test, multiple engines of different types (e.g., gasoline, diesel, electric) would be selected. Each engine type represents a different level. The test involves measuring and analyzing the response variables of interest, such as engine performance or emissions, while systematically varying input factors (e.g., throttle position, load). The goal is to assess if the response surface, which represents the relationship between input factors and the response variables, is consistent across different engine types. The test would involve conducting experiments using a design of experiments (DOE) approach. A suitable DOE method, such as factorial design or response surface methodology, would be employed. The input factors would be varied at different levels, and the corresponding response variables would be measured and recorded for each engine type.

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The required velocity of mass 100 kg is 3.75 m/s.

The required velocity of mass 100 kg is determined by applying the principle of conservation of linear momentum as follows;

This principle states that in an isolated or closed system, the sum of the initial momentum of an object is equal to the sum of the final momentum.

momentum of the 100 kg mass = momentum of 150 kg mass

100 kg x v = 150 kg x 2.5 m/s

v = ( 375 kg m/s ) / ( 100 kg )

v = 3.75 m/s

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The complete question is below:

A mass of 150 kg is moving 2.5 m/s. How fast would an object with a mass of 100kg need to be going to hit the previous mass head on and come to a complete stop?​

Answer:

B. heat and kinetic energy

Explanation:

Heat is a form of energy that flows with respect to temperature difference. Thus, heat energy would flow from an object with higher temperature to that at lower temperature. It generally cascades from a high temperature body to lower temperature body through a medium or when in contact.

Kinetic energy is the energy that is inherent in a moving object. Thus, it can be converted to other forms or transferred between objects. Example, a moving object can transfer part of its kinetic energy to an object at rest on collision. This may cause the motion of the initial stationary object.

Therefore, heat and kinetic energy can be used to describe transfer of energy to or from a substance.

Mistahimaskwa, also known as Big Bear, was a Cree leader who lived in what is now Canada during the late 19th century. He was worried about Treaty 6, a treaty that was signed between the Canadian government and several First Nations in 1876.

Mistahimaskwa was concerned about the implications of the treaty for the traditional way of life of his people. The treaty granted the Canadian government control over vast tracts of land, including areas that were important for hunting and fishing. In exchange, the government promised to provide certain goods and services to the First Nations signatories. Mistahimaskwa was skeptical about the government's promises, and he feared that the treaty would result in the loss of his people's independence and autonomy. He also believed that the treaty would lead to conflicts between different First Nations groups, as they competed for resources and territory. Ultimately, Mistahimaskwa's fears were borne out, as the treaty failed to protect the rights and interests of the First Nations signatories. Many of the promises made by the government were not kept, and the treaty contributed to the displacement and marginalization of Indigenous peoples in Canada.

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Answer:

Most energy crises have been caused by localized shortages, wars and market manipulation. Some have argued that government actions like tax hikes, nationalisation of energy companies, and regulation of the energy sector, shift supply and demand of energy away from its economic equilibrium.

The long hand that is on the clock is minute hand and it Changes by seconds hand

The maximum height above the platform reached by the box before it begins to fall is 1.5 m.

The given parameters:

The maximum height above the platform reached by the box before it begins to fall is calculated as follows;

\(mgh = E\\\\h = \frac{E}{mg} \\\\h = \frac{14.7}{1 \times 9.8} \\\\h = 1.5 \ m\)

Thus, the maximum height above the platform reached by the box before it begins to fall is 1.5 m.

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Answer:

The correct option is;

b. How high the barbell is being lifted

Explanation:

The work done in lifting the 160 N barbell is equal to the potential energy gained by the barbell in the final elevated position of the barbell

Therefore, in order to find the work done to lift the barbell, we can calculate the potential energy gained by the barbell when it is placed at height

The work done to lift the barbell = The potential energy, P.E., gained by the barbell

The potential energy of an object, P. E. = The mass of the object, m × The acceleration due to gravity, g × The height to which the barbell is lifted, h

∴ Mathematically, P.E. = m × g × h

Weight, W = Mass, m × The acceleration due to gravity, g

The weight, W of the barbell is given as W = 160 N

∴ W = m × g = 60 N

From which we have;

P.E. = m × g × h = W × h

∴ The work done to lift the barbell = P.E. = 60 N × h = 60 N × The height to which the barbell is lifted.

Therefore the information which need be known is the height to which the barbell.

Answer:

20

Explanation:

force=work done÷distance

The main and basic action of any single muscle that would have on a body would be the fact that it would contain "contraction" to which your muscle would practically contract each other, which would then give to power to force, push, push, and to make work, and also, to move.

PLEASE MARK ME AS BRAINLIEST

Answer:

The person above is correct, The Answer is "CONTRATION" just verified it by ap.ex ;)

Explanation:

Answer:

electrons

Explanation:

i think this is right

If a metal ball is suspended by a rod , the forces acting on the system are balanced so there is no motion observed in the system and this is because of the upward tension in the rod .

Option 1 says : the tension in the rod

The gravitational pull that is acting downwards direction and the tension in rod that is acting in a anti parallel direction to the gravitational pull . being on the same line of action and in opposite directions , these forces cancels each other out .

Option 2 says : the friction of rod

Friction acts in cases of contact forces like a drag or pull not in cases of non-contact forces like gravity , thus friction can't balance it .

Option 3 says : the electromagnetic force

There are no charges or magnets present in the system so the electromagnetic force is absent in this case Thus they cant balance the gravitational force.

Option 4 says : the strong force around the rod

The strong force around is not on the line of action of the gravitational pull so it cant balance it.

So out of all the forces only the tension present in the rod is able to balance the gravitational force

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The length of a pendulum whose period on the moon matches the period of a 2.8 m long pendulum on the earth is 0.462 m.

The time taken for completing one cycle of oscillation is called the period of a pendulum. The factors affecting the period of a pendulum are the length of the pendulum and the gravity of the surface of the heavenly body. It never depends on the mass of the pendulum.

The period of a pendulum is given by the formula.

\(T=2\pi \sqrt{l/g\)

Where

T= Time period

l= length of a pendulum

g= acceleration due to gravity of surface.

For the 2.8 m long pendulum on the earth,

\(T=2\pi \sqrt{2.8/9.8\)

For the pendulum of length l on moon,

\(T=2\pi \sqrt{l/1.62\)

The value of surface gravity g on moon is 1.62 \(m/s^{2}\).

According to the question,

\(2\pi \sqrt{2.8/9.8\)=\(2\pi \sqrt{l/1.62\)

So, l=2.8/9.8×1.62

     l= 0.462 m

So, the length of such pendulum is 0.462 m.

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