Applying Kirchhoff’s Junction Rule, what happens to the power source and current when the parallel circuit has two branches, each with a resistor, R? In one to two sentences, answer the question and explain your reasoning.

The speed can be obtained as 3 * 10^8 m/s.

The term speed is the ratio of the distance covered to the time taken. Given that both the distance covered and the time taken are both given in this problem we can now go ahead and try to solve the problem.

Distance covered = 11.12 km or 11.2 * 10^3 m

Time taken = 37.1 μs or 37.1 * 10^-6 s

Thus the speed = 11.2 * 10^3 m/ 37.1 * 10^-6 s

= 3 * 10^8 m/s

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At point C of a pendulum's motion, kinetic energy is converted back into potential energy.

As the pendulum bob moves upward from the lowest point of its swing, its speed decreases and its potential energy increases. At point C, the pendulum bob has stopped momentarily, so it has no kinetic energy. However, it has gained potential energy as a result of its increased height. As the pendulum bob continues to move upward towards point D, its potential energy will continue to increase, while its kinetic energy decreases.

Therefore, the correct answer is D, Kinetic energy is converted to potential energy.

What is  potential energy?

Potential energy is a form of energy that an object possesses due to its position or configuration in a system. It is the energy that an object has because of its position relative to other objects, or because of the forces acting on it.

What is kinetic energy?

Kinetic energy is the energy that an object possesses due to its motion. It is a form of energy that an object has because of its speed and mass. The formula for kinetic energy is:

KE = 1/2 * m * v^2

where KE is the kinetic energy, m is the mass of the object, and v is the velocity of the object.

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The correct answer is transient airflows under the combined motion of a  door and the force of buoyancy.

However, the combined airflow characteristics generated by door motion, ventilation airflow, and thermal impacts have not yet been thoroughly defined. Door motion has been acknowledged as playing a part in the confined conveyance between indoor and outdoor regions. This study employed dynamic CFD simulation to look at the transient airflow characteristics and amount of air exchange generated by door motions in a thermally stratified environment with displacement ventilation. The results show that at a door angle of 30°, there is a 40% air exchange even though only 15% of the overall door motion process is used during the initial phase. Two important contributing factors are the temperature difference between the air inside and outside, as well as the rotational speed of the  door.

The thermal convective flow may have a considerable impact on the airflow pattern through the doorway when the door motion is slow enough and the temperature difference is greater than 3 °C. The amount of air exchange rises linearly with door motion speed when there is no difference in temperature between the internal and exterior spaces. When buoyant force and door motion are coupled, a modest door speed yields minimal air exchange. Only the air temperatures close to the door are impacted by door movement. In the displacement ventilated room, a single door open and close cycle does not considerably reduce the overall temperature stratification. The research findings may help to improve knowledge of the consequences of dynamic disturbances in thermally stratified environments as well as offer recommendations for decreasing door motion-induced pollutant movement.

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Answer:

(a) electrical energy or chemical energy

(b) sound energy, potential energy, light energy.

(c) Work (J) = Force (N) * Distance (m)

                   = 80 * 15

                   = 1200 Joules.

(a) The initial temperature is 373.95 K.

(b) The final temperature is 546.15 K.

(c) The total internal energy change of the fluid during this process is 515.4 kJ.

(d) The process can be represented as an isochoric heating process on the P-v diagram and as an isobaric expansion process on the T-v diagram.

(a) To find the initial temperature, we can use the saturated steam tables. At a pressure of 200 kPa, the corresponding saturation temperature is 373.95 K.

(b) Since the volume doubles, the process is an isochoric (constant volume) heating process. Using the ideal gas law, we can determine the final temperature. The initial and final volumes are related by the equation V_final = 2V_initial. Since the mass remains constant, the specific volume (v) is inversely proportional to the density (ρ). Therefore, ρ_final = ρ_initial/2. Using the ideal gas law, we can calculate the final temperature to be 546.15 K.

(c) The total internal energy change can be calculated using the equation ΔU = mC_vΔT, where m is the mass of the fluid and C_v is the specific heat at constant volume. Given the mass as 0.5 kg, the specific heat of water at constant volume, and the temperature change, we can find that the total internal energy change is 515.4 kJ.

(d) On the P-v diagram, the process is represented as a vertical line at 200 kPa, indicating constant pressure. On the T-v diagram, the process is shown as an upward-sloping line, indicating an isobaric expansion process. The initial state is represented as a point on the left, and the final state is represented as a point on the right. The path between the initial and final states is a straight line connecting these two points.

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Answer: Quantum is really just an amount of any physical entity involved in an interaction.

Explanation:

The amount of heat needed to melt 35g of ice at 0 degrees Celsius is 1470 joules.

The heat needed to melt ice is calculated using the formula Q = m × Lf, where Q is the amount of heat required, m is the mass of ice, and Lf is the heat of fusion of ice (which is 334 joules per gram).

Plugging in the values, we get Q = 35g × 334 J/g = 11,690 J.

However, this is the heat required to melt ice at its melting point of 0 degrees Celsius, but the ice must also be brought up to that temperature before it can melt.

The amount of heat required to do this is calculated using the formula Q = m × Cp × ΔT, where Cp is the specific heat of ice (which is 2.09 J/g·K) and ΔT is the change in temperature.

Since the ice is initially at -273.15 degrees Celsius, ΔT = 273.15 degrees Celsius.

Plugging in the values, we get Q = 35g × 2.09 J/g·K × 273.15 K = 4,357.8 J.

Adding the two amounts of heat, we get a total of 11,690 J + 4,357.8 J = 15,047.8 J, which is approximately equal to 1470 joules.

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The maximum height of the child on the swing relative to her lowest height is determined by the conservation of mechanical energy, where the maximum height can be calculated using the maximum speed. Hence, the maximum height of the child on the swing relative to her lowest height is approximately 1.84 meters.

When a child is on a swing, the total mechanical energy is conserved, assuming negligible air resistance. The mechanical energy is the sum of the kinetic energy (KE) and the potential energy (PE). At the highest point of the swing, the kinetic energy is zero, as the child comes to a momentary stop before changing direction. At the lowest point of the swing, the potential energy is zero, as it is fully converted into kinetic energy.

Since the maximum speed is given as 6 m/s, this represents the maximum kinetic energy of the child on the swing. At the highest point, all the kinetic energy is converted into potential energy. Therefore, the maximum height can be calculated using the conservation of energy equation:

KE_max = PE_max

1/2 mv^2 = mgh_max

Simplifying the equation, we can solve for h_max:

h_max = (v^2) / (2g)

Substituting the given values, where v = 6 m/s and g is the acceleration due to gravity (approximately 9.8 m/s^2), we can calculate the maximum height:

h_max = (6^2) / (2 * 9.8) ≈ 1.84 meters

Therefore, the maximum height of the child on the swing relative to her lowest height is approximately 1.84 meters.

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The pressure setting on a pressure-cycled ventilator will determine the pressure delivered to the patient during each breath. In pressure-cycled ventilation, the ventilator delivers a predetermined pressure to support the patient's breathing.

This pressure is maintained until a certain amount of time or a specific flow rate is reached. Once this criteria is met, the ventilator cycle ends, and the pressure drops to zero.

The pressure setting on the ventilator can be adjusted to meet the patient's specific needs. Increasing the pressure setting will deliver a higher pressure to the patient's airway, providing more support.

On the other hand, decreasing the pressure setting will deliver a lower pressure, providing less support.

It is important to note that the pressure setting should be carefully adjusted and monitored to ensure patient safety.

The appropriate pressure level should be determined by the healthcare provider based on the patient's condition, lung compliance, and other clinical factors.

Regular assessment and adjustment of the pressure setting may be necessary to optimize patient ventilation and prevent complications.

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Answer:

C. Exothermic Reaction

Explanation:

Let's go through the choices

A. Combustion - Combustion is a highly exothermic / redox reaction which produces light and heat (i.e basically it bursts into flames). In the description, the only reaction is that it feels warm, hence this is not the answer.

B. Endothermic - Recall that endothermic reactions absorbs heat and thus cools the surroundings thereby making test tube feel cooler. this is obviously not the case so this is not the answer.

C. Exothermic - Recall that exothermic reactions releases heat and thus causes the surroundings thereby making the test tube feel warmer (or hotter in some cases). This describes our situation so THIS IS THE ANSWER.

D. Endergonic reactions require an input of energy from an external source that is adsorbed by the reaction (for example if heat was applied by an external source). In this case, there is no mention of additional energy sources. Hence this is probably not the answer.

Answer:

C. The half-life of uranium-235 is 713,000,000 years, the half-life of uranium-238 is 4,500,000,000 years

The time taken for the stick that the bird dropped to reach the ground is 3.96 seconds.

The time taken for the stick that the bird dropped to reach the ground is determined the using formula below:

h = ut + ¹/₂ * g * t²

where the given parameters are given below:

h = 77.0 meters

u = 0

t = ?

g = 9.81 m/s²

Solving for the time required:

77.0 = 0 * t + ¹/₂ * 9.81 * t²

t² = 77.0 * 2 / 9.81

t² = √15.7

t = 3.96 seconds

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Answer:

I think the answer you're looking for is particulate matter.

Explanation:

Zero work is done when the force and the displacement are perpendicular to each other. In other words, if the angle between the force vector and the displacement vector is 90 degrees, then the work done is zero.

Work in physics is defined as the product of the force applied on an object and the displacement of the object in the direction of the force. Mathematically, work (W) is given by the equation.

W = F * d * cos(theta)

where F is the magnitude of the force applied, d is the magnitude of the displacement, and theta is the angle between the force vector and the displacement vector.

When the angle theta between the force and the displacement is 90 degrees (perpendicular), the cosine of 90 degrees is zero. Therefore, the term cos(theta) becomes zero, and as a result, the work done is zero.

In this scenario, even though forces are being exerted or a body is moving, the forces are not contributing to the displacement of the object in the direction of the force. The force and the displacement are acting in different directions, and their vector components perpendicular to each other cancel each other out.

For example, when you push a book horizontally along a tabletop with a constant force, the displacement of the book is in the horizontal direction, while the force you exert is perpendicular to the displacement (vertical). As a result, no work is done on the book by your pushing force.

Therefore, zero work is done when the force and the displacement are perpendicular to each other.

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Answer: The Earth is an oblate spheroid, meaning it is roughly spherical in shape but flattened at the poles and bulges at the equator. This shape has been scientifically proven through centuries of evidence and observations. While some people may claim that the Earth is flat, this idea is not supported by scientific evidence.

Answer:

the answer is a because I saw it in a syllabus

Answer:

just doing this so you can give brainliest to the other person

have a great day!

Explanation:

ANSWER- I GUESS IT SHOULD BE GRAVITATIONAL FORCE.......

Answer:

GRAVITATIONAL FORCE

'These"

Explanation: galaxy

The Factors include the following:

Capabilities and Security.

Nuclear weapons are a type of weapon that uses nuclear reactions to create destructive explosion.

When a nuclear weapon explodes, it gives off four types of energy: a blast wave, intense light, heat, and radiation.

The factors that may cause a country to obtain or not to obtain nuclear weapons are discussed below:

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Answer:

Bahhhhhhhhhhhhhhhhhhh perks pls

Explanation:

The linear velocity with which the wheel must rotate is 7.48 m/s.

The wheel of a car needs to generate a total kinetic energy of 401.0 n to keep the car moving.

If the wheel weighs 6700 g, find the linear velocity with which it must rotate.

Consider the wheel to be a flat cylinder.

Assuming you want the final answer in terms of velocity, we can use the equation:

KE = 1/2×mv²

where KE is the kinetic energy, m is the mass, and v is the velocity.

We can rearrange this equation to solve for velocity ,

v = sqrt(2×KE/m)

Now we just plug in the known values and solve:

v = sqrt(2×401.0 n/6700 g)

v = 7.48 m/s

Hence , the linear velocity with which the wheel must rotate is 7.48 m/s.

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The correct answer for the (A) Escape velocity is \(570\) (B) Escape velocity is \(0.57\) in Km/h and (c). Escape velocity is \(1.27\) in mph.

Given:

Diameter of asteroid D = \(10\) km

Radius R = \(5\) Km

Density \(\rho\)  = \(3000\) kg/m³

Unit conversion;

\(1\) m/s  = \(0.001\) Km/s

\(1\) m/s  = \(2.23694\) mph

(A)To calculate Escape velocity:

Use the formula;

\(v_e = \sqrt{\dfrac{2GM}{R} }\)

Gravitational Constant \(G\) = \(6.67430\)

To calculate Mass(\(M\)) of the asteroid, Calculate Volume(\(V\)) of the sphere and multiply it with density(\(\rho\)).

\(V= \dfrac{4}{3} \pi R^3 \\\\\rho = \dfrac{M}{V}\)

\(M = \rho*V\)

= \(523598775000\) Kg

Escape velocity:

\(v_e = \sqrt{\dfrac{2*6.67430 * 10^{-11} * 523598775000}{5000} }\)

\(= 570\) m/s

(B)Escape velocity in Km/s:

\(v_e = \dfrac{570}{1000}\)

\(= 0.57\)  Km/s

(B)Escape velocity in mph:

\(v_e = 0.57 * 2.23694\)

\(= 1.27\) mph

Escape velocity is \(570\) m/s. In Km/h is \(0.57\) and In mph is \(1.27\) .

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When the tension on a string is 78.0 N, the wave speed on the string is 154 metres per second. A tension of 141.5 N will give a wave speed of 182 m/s.

The wave speed on a string is given by the equation:

v = \(\sqrt{}\)(T/μ)

where v is the wave speed, T is the tension in the string, and μ is the linear density of the string.

We can rearrange this equation to solve for T:

T = μ\(v^2\)

We are given the initial tension T₁ = 78.0 N and wave speed v₁ = 154 m/s. We want to find the tension T₂ that will give a wave speed of v₂ = 182 m/s.

First, we need to find the linear density μ of the string. This can be calculated from the mass per unit length:

μ = m/L

The wave speed is proportional to the square root of the tension and inversely proportional to the square root of the linear density. Therefore, the ratio of the tensions is equal to the ratio of the wave speeds squared

T₂/T₁=\((v2/v1)^2\)

Solving for T₂, we get:

T₂ = T₁\((v2/v1)^2\)

Putting  in the given values, we get:

T2 = 78.0 N × (182 m/s / 154 \(m/s)^2\)

T2 = 141.5 N

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Answer:

Cho hai quả cầu nhỏ trung hòa điện đặt trong không khí, cách nhau 40cm và sử có bốn nhân 10 mũ 12 electron tư quả cầu này di chuyển sang qua câu kia hỏi khi đó hai quả cầu Vũ thấy đầy nhau tỉnh đô lớn của lực đó