PLEASE HELP MEE 15 POINTS
the model represents a(n)

A. Compound
B. Mixture
C. Element
D. Electrons

Given,

The weight, W = 190 N

The height, H = 45 m

The potential energy is calculated by the formula,

Calculate the potential energy by substituting the given values.

Thus, the potential energy is 8,550 Joules.

Answer: A positively charged insulating rod is brought close to an object that is suspended by a string. If the object is repelled away from the rod, we can conclude that the object is positively charged.

Explanation: To find the answer, we need to know more about the Electric charges and its properties.

Thus, from the above, we can conclude that, when a positively charged insulating rod is brought close to an object that is suspended by a string. If the object is repelled away from the rod, we can conclude that the object is positively charged.

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Answer:

positively charged

Explanation:

when a positively charged object is being repelled, that means the charge should be the same for both.

The free-body diagram (FBD) for a 3 kg steel block being pulled at a constant speed on ice is found in the attachment.

The values of the four forces acting on the steel block are:

Free-body diagrams (FBDs) are visual representations that show the forces acting on an object. They are a tool used in physics to help analyze and understand the motion of an object.

In a free-body diagram, the object is represented as a dot or a box, and all the forces acting on the object are shown as arrows. The direction of the arrow represents the direction of the force, and the length of the arrow represents the magnitude of the force.

The values of the four forces acting on the steel block are:

Gravitational force/Weight is 3 * 9.81 = 29.43 N

Normal force = 29.43 N

The frictional force is 29.43 N * 0.04 (coefficient of friction) = 1.4715 N

Net force = 0 N since the 3 kg steel block is being pulled at a constant speed on the ice.

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The current expected to measure when the heat strips are energized is 14.1A.

Current can be defined as the rate of flow of electric charge round a circuit.

To calculate the current that will be measured when the heat strips are energized, we use the formula below.

Formula:

Where:

Make I the subject of the equation

From the question,

Given:

Substitute these values into equation 2

Hence, the current expected to measure when the heat strips are energized is 14.1A.

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Answer:

there are many metals in the periodic table and all have different atomic number and mass

Explanation:

Answer: For producing the error free results of an experiment that identification and quantification of effects of uncertainties are important.

Explanation:

The error analysis is necessary to detect the uncertainties in the measured data or results of the experiment to ensure the validity and acceptability of the results. The errors can be avoided by increasing the precision and accuracy of the measuring instruments. The other factors like changes in the variables of the experiment can also contribute to the errors in the experiment.

It is necessary to perform the multiple trails in an experiment to assure that the results of the experiment are consistent with every trial.

Answer:

sorry I don't understand

Explanation:

please translate it in english

It is the product of the length and the linear charge density.

Linear charge density is defined as the amount of charge per unit length of the rod. Therefore, if we know the length of the rod and its linear charge density, we can easily calculate the amount of charge on that length of the rod by multiplying the two values.For example, if a rod is 2 meters long and has a linear charge density of 5 C/m, the amount of charge on the rod would be:Charge = Length x Linear Charge Density Charge = 2 m x 5 C/m Charge = 10 C .

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The correct answer is b. It is the product of the length and the linear charge density.

The amount of charge on a certain length of a rod that is uniformly charged can be determined by multiplying the length of the rod by its linear charge density. Linear charge density is defined as the amount of charge per unit length, and is expressed in units of Coulombs per meter (C/m). By multiplying the linear charge density by the length of the rod, we can determine the total amount of charge present on the rod. For example, if a rod has a linear charge density of 5 C/m and a length of 2 meters, the amount of charge on the rod would be 10 Coulombs (5 C/m x 2 m = 10 C). Therefore, option b is the correct answer as it describes the relationship between the charge and length of a uniformly charged rod.

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In a circuit with two identical components connected in parallel, the current which flows through its different branches will be different.

A parallel circuit can be defined as a type of circuit that comprises branches so that the current divides and only part of it flows through any branch.

In this type of circuit (parallel circuit) the voltage, or potential difference, across each branch of a parallel circuit is the same, but the currents may vary.

The main characteristics of parallel circuits include the follow;

Thus, a parallel circuit will have same voltage across the circuit components and different current flowing in each components.

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Answer:

False

Explanation:

Newton's third law - For every action there's an equal and opposite reaction, action and reaction act on different objects

Answer:

.17Hz

Explanation:

The formula for frequency is f= 1/T , where T is the period.

f = 1/6 and 1/6 ≈ .17

Answer:

32.32857

Explanation:

Searched on the web

Based on the information given, it's indicated that the teams increase in velocity over the course.

Kinetic energy simply means the energy that is due to the motion of an object. When work is done on an object, the object gains kinetic energy.

From the complete information, it should be noted that the kinetic energy varies with the square of velocity. Therefore, it's indicated that there will be an increase in the velocity of the teams.

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Answer:

Pluto is no longer considered a planet as a result of it's small size on the IAU scale.

Explanation:

Answer:

a wave passes through a given point or medium what is it called ?

Mechanical waves

Answer:

Ration of internal energy of hydrogen to the internal energy of helium is equal to \(\frac{5}{6}\)

Explanation:

As we know

degree of freedom of hydrogen is 5

Degree of freedom of helium is 3

Internal energy of hydrogen

\(\frac{5}{2} * 2 * RT = 5 *RT\)

Internal energy of helium

\(\frac{3}{2} * 4 * RT = 6 *RT\)

Ration of internal energy of hydrogen to the internal energy of helium is equal to \(\frac{5}{6}\)

According to the research, the correct option is A. A psychologist whose goal is to explain a behavior will record descriptions as objectively as possible.

It is a professional who diagnoses and is responsible for collecting facts about the behaviors and experiences of living beings, organizing them in a systematic way and developing theories for their understanding.

This means that psychologists analyze the behavior of living beings from a scientific approach and these studies allow us to explain their behavior.

Therefore, we can conclude that according to the research, the correct option is A. A psychologist whose goal is to explain a behavior will record descriptions as objectively as possible.

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Answer:

The answer is the fourth option

Explanation:

For everyone on edg3, it is D) suggest why a behavior occurs.

false

i just researched it it’s not true

Answer:The disturbance created by a source of sound in the medium travels through the medium and not the particles of the medium

Explanation:i hope this is right

Answer:

=720000kgm/s

Explanation:

The impuse is equivalent to the rate of change of momentum which is expressed below as

Impulse= mv2 - mv1

=m(V2 - V1)

V1= initial velocity= 242 m/s

V2=final velocity= 258 m/s?

m= mass of the plane =45,000 kg

Then if we input the values, we have,

= 45000(258-242)

=720000kgm/s

Hence,the impulse on a 45,000 kg airplane is 720000kgm/s

Answer:

Explanation:

The initial position of the ball = - 5 .0 m from the hole .

It is negative because , direction towards the hole is positive so direction from the hole will be negative .

Final position of the ball = 0 m from the hole .

Displacement of the ball = Final  position - Initial  position

= 0 - ( - 5 ) = 5 .0 m

Displacement = + 5 m

Answer:

(a) 400 J

(b) 40000 J

Explanation:

Work done is the product of force and displacement. Therefore, in a graph where the y-axis represents force and the x-axis represents displacement, the area under the graph represents work done.

Therefore, to calculate the work done from the given graphs, we have to calculate the area under them.

(a) The graph is in the shape of a triangle, so:

Work done = area under force-displacement graph

                   = \(\frac{1}{2}\) × base × height

                   = \(\frac{1}{2} \times 20 \times 40\)

                   = 400 J

(b) The graph has an irregular shape, and so we can find the area of one of the small squares and then multiply that by the number of small squares under the graph.

Are of one square = length × width

                              = \(50 \times 100\)

                              = 5000 J

There are a total of eight small squares under the graph, therefore:

Work done = \(5000 \times 8\)

                   = 40000 J

The percentage of time the operator of the single entrance booth will be free is approximately 38.462%.

To determine the percentage of time that the operator of the single entrance booth will be free, we need to calculate the service rate and the arrival rate. The service rate is given as 400 vehicles per hour, and the arrival rate is 250 vehicles per hour. The percentage of time the operator will be free can be calculated using the formula:

Free time percentage = (Service rate - Arrival rate) / Service rate * 100

Substituting the given values into the formula:

Free time percentage = (400 - 250) / 400 * 100

= 150 / 400 * 100

= 0.375 * 100

= 37.5%

Rounding off the answer to the nearest thousandths, the percentage of time the operator of the single entrance booth will be free is approximately 38.462%.

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Blue light in the visible zone has a very short wavelength. So that it produces a higher amount of energy that's why the blue part of visible light transfers the most energy.

The light which is visible to the human eye is known as visible light. In the complete spectrum, the human eye is sensitive to only the visible

light spectrum. Visible light is that part of the electromagnetic spectrum that is seen in the form of violet, indigo, blue, green, yellow, orange, and red.

Blue light has the highest frequency among the given lights. Hence it will transmit the most amount of energy.

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Answer: Blue

Explanation: Got it right on Edge.

Answer:

D

Explanation:

projectile motion

is the answer

Answer:

Explanation:

Given:

F = 5.0 N

p = 9.6·10³ Pa

____________

S - ?

S = F / p = 5.0 / 9.6·10³ ≈ 0,52·10⁻³ м² = 5.2 cm²

Answer:

≈ 5.21 N

Explanation:

The formula for pressure is \(P=\frac{F}{A\\}\), with P being the pressure, F the force, and A the area of contact.

Since we are given that the force is \(5.0\) N and the pressure is \(9.6*10x^{3}\), we can figure out the area of contact by rearranging the formula a bit.

1) You multiply A on both sides to get F alone:

\(P*A=\frac{F}{A} *A\)

2) Then you divide P on both sides to get A alone:

\(\frac{P*A}{P} =\frac{F}{P}\)

3) Then you plug in the numbers given:

\(A=\frac{5.0}{9.6 * 10^{3} }\)

4) And finally you just solve:

\(\frac{5.0}{9.6 * 10^{3} }\) ≈ \(5.208\) or \(5.21\)

Answer:

340m/s

Explanation:

Given parameters:

Wavelength  = 2m

Frequency   = 170Hz

Unknown:

Velocity of the wave  = ?

Solution:

The velocity of the wave is the product of frequency and wavelength of the wave;

          V  = F λ

V is the velocity

 F is the frequency

λ is the wavelength

  Insert the parameters and solve;

          V = 2  x 170 = 340m/s

The velocity of the wave with the given wavelength and frequency is 340m/s.

Given the data in the question;

Velocity; \(v =\ ?\)

To determine the velocity of the wave, we use the expression for the relations between wavelength, frequency and speed.

\(\lambda = \frac{v}{f}\)

Where \(\lambda\) is wavelength, f is frequency and v is speed.

We substitute our given values into the equation

\(2m = \frac{v}{170s^{-1}}\\\\v = 2m * 170s^{-1}\\\\v = 340m/s\)

Therefore, the velocity of the wave with the given wavelength and frequency is 340m/s.

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The number of electrons leaving the battery per minute is approximately 1.13 × 10^20.

To determine the number of electrons leaving the battery per minute, we can use the equation:

I = V / R

The current, represented by I, is determined by the voltage, denoted as V, divided by the resistance, symbolized by R.

V = 9.0 V

R = 3.0 Ω

Substituting the values into the equation:

I = 9.0 V / 3.0 Ω = 3.0 A

The current represents the rate of flow of charge, and each electron carries a charge of 1.6 × 10^-19 C. Therefore, the number of electrons leaving the battery per minute can be calculated using the equation:

Number of electrons = I * (1 C / (1.6 × 10^-19 C)) * (60 s / 1 min)

Substituting the values:

Number of electrons = 3.0 A * (1 C / (1.6 × 10^-19 C)) * (60 s / 1 min) ≈ 1.13 × 10^20 electrons

Hence, the number of electrons leaving the battery per minute is approximately 1.13 × 10^20.

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