if the trench is dug too deep or if there are low spots in the trench, ____ should be used as fill under the pipe.

While a car travels around a circular track at a constant speed, its speed is changing with direction.

The acceleration of an object is the rate of change of velocity of the object with time.

The acceleration of an object moving in a circular track is known as centripetal acceleration.

a = v²/r

where;

The speed of an object is a scalar quantity without direction, but when it occurs in a circular track, the speed occurs in different direction, so acceleration for constant speed in a circular track cannot be zero.

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When two massless springs of force constants k1 and k2 are joined end to end, the resultant force constant k of the system can be calculated.

In this configuration, the springs are connected in series. For springs connected in series, the resultant force constant is given by the reciprocal of the sum of the reciprocals of the individual force constants:

1/k = 1/k1 + 1/k2

To find k, we take the reciprocal of both sides of the equation:

k = 1 / (1/k1 + 1/k2)

To simplify the expression, we can use the concept of the least common denominator:

k = 1 / ((k2 + k1) / (k1 * k2))

  = k1 * k2 / (k1 + k2)

Therefore, the resultant force constant k of the system is given by

k1 * k2 / (k1 + k2).

When two massless springs of force constants k1 and k2 are joined end to end in series, the resultant force constant k of the system is given by k = k1 * k2 / (k1 + k2). This can be derived using the formula for springs connected in series, which states that the reciprocal of the resultant force constant is equal to the sum of the reciprocals of the individual force constants.

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Answer:

I think it's 7 × 10²

Explanation:

0.0035 time 200000 is 700 and 700 in scientific notation is 7 × 10²

Though i'm not certain if that is correct

Answer:

33. at the top?

34. to add more "energy" to the water and keep it moving

35. the dam because the energy is is building up

Explanation:

i tink that's correct sorry if not

have a good rest of ur day

Answer: A waterfall

Explanation:

Water at the top of a very high waterfall possesses gravitational potential energy. As the water falls, this energy is converted into kinetic energy, resulting in a flow at a high velocity.

Answer:

c

Explanation: i took the same text and got a 90

Direct current (DC) would be best because with DC, the current flows steadily in one direction.  correct   answer be Option (B).

There are two main methods for creating electric current. Direct current (DC) and alternating current (AC) are these (AC).

Direct current is a technique in which electricity consistently flows in the same direction, like the flow of a river. It discusses how electricity generated by solar panels, batteries, and other sources flows.

On the other hand, alternating current (AC) is a method in which the positive and negative sides are alternately switched at regular intervals, thereby altering the direction of the energy flow. This is the electricity that is provided by a plug-in or a generator. Both the electricity generated at power plants and the electricity delivered to homes are transmitted using alternating current.

So, Direct current (DC) would be best for LED lights will only work if the current is flowing in one direction.

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The water level rise dH= 0.7 x 10⁻⁶cm.

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Option D from the following is the solution concentration expressed in terms of mortality because it represents the number of moles dissolved in a liter of the solution.

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

The molarity of a solution is expressed in terms of the number of moles dissolved per liter of the solution.

The number of moles dissolved in a liter of the solution, represented by option D from the following, is the solution concentration stated in terms of mortality.

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The tangential speed v is said to be proportional to the distance r from the center of rotation according to the equation v = r v = r.

The definition of angular momentum (L), with some simplification, is the object's distance from the rotation axis multiplied by the linear momentum: L = r*p or L = mvr. The height of the radar system, h, is fed into the equation d=(2Reh) to determine the radar horizon, where Re is the Earth's radius and d is the radar horizon. The radial distance d can be calculated using the analytic equation given by tan (1 + )/tan (0 + ), where is gaussian noise (sensor position h = 0.1).

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A) The mass of 28.76 mL of acetone is approximately 22.7 g.

B) The volume of 6.40 g of acetone is approximately 8.12 mL.

A) To determine the mass of 28.76 mL of acetone, we need to know the density of acetone. The density of acetone is approximately 0.789 g/mL. Therefore, we can calculate the mass as follows:

Mass = Volume * Density

Mass = 28.76 mL * 0.789 g/mL

Performing the calculation:

Mass ≈ 22.67564 g

Rounding the result to the correct number of significant figures, the mass of 28.76 mL of acetone is approximately 22.7 g.

B) To determine the volume of 6.40 g of acetone, we can rearrange the formula:

Volume = Mass / Density

Volume = 6.40 g / 0.789 g/mL

Performing the calculation:

Volume ≈ 8.116 g/mL

Rounding the result to the correct number of significant figures, the volume of 6.40 g of acetone is approximately 8.12 mL.

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Answer:

ADHD, also called attention-deficit disorder, is a behavior disorder, usually first diagnosed in childhood, that is characterized by inattention, impulsivity, and, in some cases, hyperactivity.

Explanation:

Answer:

Explanation:

The light reflects off a rough surface, what happens to the image is that will occurs No image is formed.

Reflection of light happens when a ray of light strikes a reflective surface and returns to its original medium. This phenomenon allows us to see all bodies that do not produce their own light, called secondary sources of light or simply illuminated bodies.

Diffuse reflection occurs when light reflects off a rough surface and forms a blurry image or no image at all.

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Tension and compression forces act on diagonal and vertical members respectively in a truss structure.

A truss is a construction that comprises of a progression of interconnected triangles, intended to disperse stacks and give security. The powers that follow up on a bracket can be characterized into two kinds: pressure and pressure powers.

Tension powers are powers that draw on a part, like a rope or link. In a support, strain powers follow up on the corner to corner individuals that structure the triangles. These individuals are under pressure since they are being pulled separated.

Compression forces are forces that push on a part, like a segment or shaft. In a support, pressure powers follow up on the upward individuals that associate the top and base harmonies of the bracket. These individuals are under pressure since they are being crushed together.

Notwithstanding pressure and pressure powers, brackets can likewise be exposed to twisting minutes and shear powers, which are brought about by outer burdens following up on the support.

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Answer:

Frequency=  0.16655137

Explanation:

may i be brainliest?

Answer: A strain on the body or mind i guess??

A strain on the body or mind is the BEST definition of stress.

In conclusion, a strain on the body or mind is the BEST definition of stress.

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Answer:

first you need to convert unit into metres and then continue with calculation

Answer: 376.2 nm

Explanation:

The equation for single slit diffraction is \(wsin(\theta)=m\lambda\) (w is width of slit, \(\theta\) is the angle of the fringe of concern to the slit, m is a number based on the type of fringe it is, and \(\lambda\) is the wavelength of the light)

The distance between the slit and the wall is given, and the distance between the fringes of destructive interference that are next to the central bright spot is also given.

Thus, trigonometry can be used to find the angle of one of the fringes of destructive interference of concern to the slit.

The distance between the central bright fringe and a fringe of destructive interference next to the central bright fringe is \(\frac{3.10*10^{-3}}{2}=1.55*10^{-3}\) meters.

Thus, \(tan(\theta)=\frac{1.55*10^{-3}}{2.06}\), which then means that \(\theta=tan^{-1}(\frac{1.55*10^{-3}}{2.06})=0.0431\) degrees.

We know the width of the slit.

Since the fringe of destructive interference is next to the central bright fringe, the value of m is 1. m = 1,2,3,... for destructive interference fringes and m=1/2,3/2,5/2,... for constructive interference fringes. m increases by 1 for every successive constructive or destructive fringe that gets further from the central bright fringe.

Plugging into the equation gives \(5*10^{-4}*sin(0.0431)=1*\lambda\).

Rearranging the equation gives \(\lambda=5*10^{-4}*sin(0.0431)=3.762*10^{-7}\) meters.

Converting to nanometers gives \(\lambda=3.762*10^{-7}*10^9=376.2\) nanometers.

The half-life of a radioactive isotope is the time it takes for half of the initial amount to decay. So 0.31 mg will remain after 150 hours.

For sodium-24, the half-life is 14.96 hours. To determine the amount of sodium-24 that remains after 150 hours, we need to calculate the number of half-lives that have occurred during that time. We can do this by dividing the total elapsed time by the half-life of the isotope:

150 hours / 14.96 hours = 10.07 half-lives

Since each half-life reduces the amount of the isotope by half, after 10 half-lives, we would expect the amount to be reduced by a factor of \(2^{10}\) = 1024. So, the amount of sodium-24 that remains after 150 hours would be:

320 mg × (1/1024) = 0.31 mg

This is the theoretical minimum amount of sodium-24 that would remain after 150 hours. In practice, other factors such as environmental conditions and decay products can affect the actual amount remaining.

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The drift velocity v will give us the answer.

\(v = (5 V) / ((2x10^20 electrons/m³) * (2x10^-6 m²) * (1.6x10^-19 C))\)

To find the drift velocity of charges in the wire, we can use Ohm's Law, which states that the current flowing through a conductor is directly proportional to the applied voltage and inversely proportional to the resistance. The equation for Ohm's Law is:

I = V / R

Where:

I is the current flowing through the wire,

V is the applied voltage (in this case, 5 Volts),

R is the resistance of the wire (given as 10^2 Ohms).

Now, we need to calculate the current flowing through the wire using Ohm's Law. The current is the rate at which charges (electrons) move through the wire. The equation for current is:

I = n * A * v * q

Where:

n is the number of charges per unit volume (given as 2x10^20 electrons),

A is the cross-sectional area of the wire (given as 2 mm² or 2x10^-6 m²),

v is the drift velocity of the charges (what we need to find),

q is the charge of each electron (1.6x10^-19 C).

Rearranging the equation and solving for v, we have:

v = I / (n * A * q)

Substituting the given values:

v = (5 V) / ((2x10^20 electrons/m³) * (2x10^-6 m²) * (1.6x10^-19 C))

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Answer:

Heat capacity, Q = 38500 Joules

Explanation:

Given the following data;

Mass = 2 kg

Initial temperature, T1 = 30°C

Final temperature, T2 = 80°C

Specific heat capacity of copper = 385 J/Kg°C

To find the quantity of heat required;

Mathematically, heat capacity is given by the formula;

\( Q = mcdt \)

Where;

Q represents the heat capacity or quantity of heat.

M represents the mass of an object.

C represents the specific heat capacity of water.

dt represents the change in temperature.

dt = T2 - T1

dt = 80 - 30

dt = 50°C

Substituting the values into the formula, we have;

\( Q = 2 * 385*50\)

Heat capacity, Q = 38500 Joules

Answer:

10,000 m/s per 100 seconds

Answer:

The height of the wave is determined by the wind strength and fetch.

Explanation:

The height of the wave is determined by the wind strength and fetch.

The more the strength and the more the fetch size the more will be the height of the wave.

Remember as the wave approaches the coast its wavelength decreases and the wave height increases, whereas when the wave goes away from the coast its wavelength increases and height decreases.

Answer:17: A wave can be defined as follows: It is important to realize that a wave is quite a different object than a particle. A baseball thrown though a window transfers energy from one point to another, but this involves the movement of a material object between two points.

Explanation:

18: In this way, we classify waves into electromagnetic and mechanical waves. The main difference between mechanical and electromagnetic waves is that electromagnetic waves do not require a medium to propagate whereas mechanical waves require a medium in order to propagate.

The detection of the elusive neutrino, which was proposed by Wolfgang Pauli in the 1930s, did not occur until 1956 due to several factors, including technological limitations and the difficulty in distinguishing neutrino interactions from other background signals.

Neutrinos are extremely weakly interacting particles, which made their detection challenging. Until the mid-20th century, the technology and experimental techniques needed to detect such low-energy particles were not available.

Additionally, neutrinos have very low mass and do not carry an electric charge, making them difficult to detect directly. Furthermore, neutrinos interact very rarely with matter, leading to low event rates.

It required advancements in detector technologies and the development of large-scale experiments, such as the Homestake Experiment in 1956, to finally confirm the existence of neutrinos and demonstrate their role in nuclear reactions.

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A resume is usually read for less than C. 30 seconds by an employer.

A resume is a document that presents your educational qualifications, experiences, and achievements that have taken place throughout your academic career and professional life. This document is crucial in a job application process, and it plays a key role in determining whether an employer is interested in interviewing you or not. Thus, it is necessary to write a well-written and a concise resume that catches the employer's attention in less than 30 seconds. This is because most employers go through many job applications and they do not have much time to read every resume thoroughly.

Therefore, it is essential to organize and format the resume in such a way that the key information and skills stand out. In addition, it is necessary to customize the resume to fit the job requirements of each job application, this can be done by researching the company and the job position to determine what skills and qualifications the employer is looking for. In conclusion, it is crucial to ensure that the resume is well-written, organized, and customized to fit the employer's requirements. So the correct answer is C. 30.

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To find the average velocity during each time period, we need to calculate the displacement and divide it by the time interval.

(a) Average velocity from t = 1 to t = 2:

Average velocity = Displacement / Time interval

(b) Average velocity from t = 1 to t = 1.1:

Average velocity = Displacement / Time interval

(c) Average velocity from t = 1 to t = 1.01:

Average velocity = Displacement / Time interval

(d) Average velocity from t = 1 to t = 1.001:

Average velocity = Displacement / Time interval

To estimate the instantaneous velocity at t = 1, we can take the derivative of the displacement function with respect to time and evaluate it at t = 1:

Instantaneous velocity at t = 1:

v(1) = d/dt [4 sin(st) + 2 cos(at)] evaluated at t = 1

Velocity is a vector quantity that indicates how fast an object is moving. The magnitude of this vector is called speed and is expressed in meters per second.

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The problem of determining the current and power in a parallel circuit involving two resistors and a voltage source involves the field of circuit analysis. The problem requires us to calculate the current flowing through the circuit, as well as the power dissipated in the resistors.To solve this problem, we can use the principles of Ohm's Law and parallel circuit analysis, which describe the relationships between voltage, current, and resistance in a circuit. By applying these principles to the given circuit, we can determine the current flowing through the resistors, as well as the total power dissipated in the circuit.To determine the current in the circuit, we can use the formula for the total current in a parallel circuit, which is given by I = V / (R1 + R2). We can then use this value to calculate the power dissipated in each resistor, using the formula P = I^2 * R.Overall, this problem demonstrates the application of circuit analysis principles to solve a real-world problem involving the behavior of electrical circuits. By understanding the behavior of circuits in response to voltage and current inputs, we can design and optimize circuits for a wide range of applications in electronics, communications, and power systems.

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A. Ohm's law, the current in the circuit can be found with the equation I = V / Rt. Therefore, I = 8.75 V / 3.54 Ω = 2.47 A.

B. The value of the current, I, in amperes is  2.47 A.

C. The total power, P, dissipated in the circuit can be found using the formula:  R2, P = \((2.47 A)^2\)* 9.2 Ω = 56.2 W.

A. The total resistance in a parallel circuit can be calculated using the equation 1/Rt = 1/R1 + 1/R2, where Rt is the total resistance. Therefore, Rt = (R1 * R2) / (R1 + R2) = (7.5 * 9.2) / (7.5 + 9.2) = 3.54 Ω.

Using Ohm's law, the current in the circuit can be found with the equation I = V / Rt. Therefore, I = 8.75 V / 3.54 Ω = 2.47 A.

B. The value of the current, I, in amperes is 2.47 A.

C. The power, P, in watts, dissipated in the circuit can be calculated using the equation P = \(I^2\) * R, where R is the resistance of either resistor in the circuit. Using R1, P =\((2.47 A)^2\) * 7.5 Ω = 45.9 W. Alternatively, using R2, P = \((2.47 A)^2\)* 9.2 Ω = 56.2 W.

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To determine the voltage produced by a voltaic cell consisting of a calcium electrode in contact with a solution of Cu2+ ions, we need to know the standard reduction potentials of the half-reactions involved.

The standard reduction potential of the calcium electrode (Ca2+ + 2e- → Ca) is -2.87 V (reduction potential).

The standard reduction potential of Cu2+ ions (Cu2+ + 2e- → Cu) is +0.34 V (reduction potential).

To calculate the voltage produced by the cell, we subtract the reduction potential of the anode (calcium) from the reduction potential of the cathode (copper):

Voltage = Reduction potential of cathode - Reduction potential of anode

       = (+0.34 V) - (-2.87 V)

       = +3.21 V

Therefore, the voltage produced by the voltaic cell consisting of a calcium electrode in contact with a solution of Cu2+ ions is approximately +3.21 V.

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Answer:

If the Law has already been est. then the answer should be true .

Explanation:

If the law has already been est. then they can still test the theory of that law. If you test it you might find something new and interesting because the science might have missed something or a factor. It is a good thing to test things,even after establishment.

The slit separation that will produce first-order maxima at angles of ±35 degrees from the incident direction is approximately 1.11 micrometers.

To determine the slit separation that will produce first-order maxima at angles of ±35 degrees from the incident direction, we can use the equation for the location of the maxima in a double-slit interference pattern:

d * sin(θ) = m * λ

where d is the slit separation, θ is the angle from the incident direction, m is the order of the maxima, and λ is the wavelength of the laser light.

In this case, we want to find the slit separation (d) that produces first-order maxima at angles of ±35 degrees (θ = ±35 degrees) and the wavelength (λ) is given as 680 nm.

Let's calculate the slit separation for the positive angle (+35 degrees):

d * sin(35 degrees) = 1 * 680 nm

Converting the angle to radians and the wavelength to meters:

d * sin(0.6109 radians) = 1 * 680e-9 m

Simplifying the equation, we have:

d = (680e-9 m) / sin(0.6109 radians)

Calculating this expression, we find:

d ≈ 1.11e-6 m

Therefore, the slit separation that will produce first-order maxima at angles of ±35 degrees from the incident direction is approximately 1.11 micrometers.

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Answer:

transcranial

Explanation:

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