Why does magnesium bromide have a 2?

Three identical capacitors are connected in series across a battery. If a charge of Q flows into this combination of capacitors, then each capacitor carries Q/3 charge..

In a series combination of capacitors, the capacitors are connected end to end. The plates of the capacitors that are adjacent to each other are connected.

Therefore, they share the same charge.

In a series combination of capacitors, the charge remains the same on each of the plates connected in series.

Let us consider a combination of three identical capacitors that are connected in series across a battery. The battery creates a potential difference across the three capacitors.

This results in the charging of the capacitors.

The total charge Q is the same on each capacitor, since the capacitors are in series.

So, each capacitor carries a charge of Q/3.

This is because the voltage is divided across the three capacitors, resulting in the same charge being stored on each capacitor.

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Answer:

solar energy

Explanation:

Photovoltaics solar energy is a clean ,renewable source of energy that uses solar radiation to produce electricity

Given:

A ball bouncing eventually comes to stop.

To find:

What kind of a system is this?

Explanation:

An open system is a system where the free exchange of matter and energy with the surroundings takes place.

A closed system is where only the energy of the system is shared with the surrounding. In these kinds of systems, the exchange of matter does not take place.

An isolated system is where neither matter nor energy is exchanged between the system and the surrounding.

When a ball is bouncing, it gradually loses its kinetic energy to the surroundings and eventually comes to stop. But the mass of the ball remains the same. Thus this is a closed system.

Final answer:

The given system is a closed system.

Therefore the correct answer is option B.

Answer:

The distance from Jerusalem to Galilee is approximately 150 km depending on the route you take. You can get a bus from Jerusalem's central bus station to Tiberias, on the edge of the Sea of Galilee. The journey takes about 2-3 hours.Sep 4, 2019

The density of water is 1.0 g/cm³. It's required to determine the mass of water displaced by a submerged 120-cm³ block and the buoyant force on the block.To find the mass of water displaced by a 120 cm³ block, we first need to know the mass of 1 cm³ of water, which is equal to its density, which is 1.0 g/cm³.

The volume of the block is 120 cm³, so we can calculate its mass by multiplying its volume by the density of water. Therefore, the mass of the block submerged in water is:120 cm³ × 1.0 g/cm³ = 120 gTo find the number of kilograms, we divide the value obtained by 1000. Therefore, 120 g = 0.12 kg.The buoyant force is equal to the weight of the water displaced by the block. The buoyant force equals the weight of water displaced by the object.

The weight of 1 cm³ of water is 9.8 N (newtons), which is equal to the weight of 1 g of water. We can use this to calculate the weight of water displaced by the block as follows:120 cm³ × 1.0 g/cm³ × 9.8 N/g = 1176 NTherefore, the buoyant force acting on the block is 1176 N (Newtons).

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Explanation:

In a series circuit such as this, the current is the same through all of the components

Current THROUGH 7.7 ohm resistor is .25 A

             V = IR  = 7.7 * .25 = 1.925 V

Current THROUGH 4.9 Ω resistor is also .25 A

            V = IR = 4.9 * .25 = 1.225 V

Summed = battery V      1.925 + 1.225 = 3.15 V

( P.S.   VOLTAGE is measured ACROSS a component and CURRENT is measured THROUGH a component)

The average thrust of the rocket engine to burnout is 4308.8 kN, the burnout time of the rocket is 140 seconds, and the speed at burnout is 8.91 km/s.

The force generated by the engine of the rocket is thrust. For the movement of the rocket, thrust is required. The rocket's mass and the acceleration it achieves as a result of the thrust are directly proportional.The initial weight of the single stage rocket is 500 kN, of which 420 kN is fuel, the weight of payload weight is 40 kN and the structural mass of the booster is 40 kN.Thus, the weight of the rocket is the sum of the weight of the fuel, the weight of the payload, and the weight of the structural mass of the rocket, which is 420 + 40 + 40 = 500 kN. Since the rocket starts from rest, the initial velocity of the rocket is zero and the distance covered by the rocket is also zero. Thus, the initial acceleration of the rocket is zero. When the rocket engine is ignited, it exerts a force called thrust, which is equal to the rate at which the rocket engine expels mass multiplied by the exhaust velocity. The mass of fuel ejected per second is the fuel burn rate, which is 3 kN/s. The exhaust speed is 3 km/s, so the thrust exerted by the rocket engine is given by the product of fuel burn rate and exhaust speed. Thus, the average thrust of the rocket engine to burnout can be determined by the formula: T = * + / * , where T is the average thrust of the rocket engine to burnout, is the mass of the rocket at any time t, is the acceleration due to gravity, is the exhaust velocity, and is the time taken to burn the entire fuel. = 500 – 3 (mass of the rocket after time t), = 9.6 m/s², and = 3 km/s or 3000 m/sThus, T = (500 – 3) * 9.6 + 3 * 10³ = 4800 – 28.8 + 3000The burnout occurs when the fuel runs out. = 500 – 3 = 0t = 500/3 seconds = 166.67 seconds Therefore, the average thrust of the rocket engine to burnout is T = 4800 – 28.8(166.67) + 3000 = 4308.8 kN. The burn time of the rocket is the time it takes to burn all of the fuel and reach burnout. The rocket's burnout time can be determined using the fuel burn rate, which is 3 kN/s and the mass of fuel in the rocket, which is 420 kN. Since the mass of fuel ejected per second is constant, the burn time of the rocket is obtained by dividing the mass of fuel by the fuel burn rate. = 420 kN, / = 3 kN/st = // = 140 seconds Thus, the burnout time of the rocket is 140 seconds

The velocity of the rocket at burnout is obtained by integrating the thrust of the rocket engine with respect to time. = 500 – 3 = 80 kN, = 9.6 m/s², and = 3 km/s or 3000 m/sT = * + / * = 768 + 240000/The velocity of the rocket at burnout is the integral of the thrust from zero to the time of burnout, divided by the mass of the rocket at burnout. = 1/80 * ∫₀¹⁴₀ (768 + 240000/) = 8.91 km/s Thus, the speed at burnout is 8.91 km/s.

The average thrust of the rocket engine to burnout is 4308.8 kN, the burnout time of the rocket is 140 seconds, and the speed at burnout is 8.91 km/s.

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Solutions for the following equations are as follows:

1. \(Yi ≤ 424 ∀ i$X_3+X_7 ≤ 1$\)

2.    \($∑_{i=1}^{7} X_i ≥ 3$\).

3. \($X_3 + X_7 ≤ 1$\)

4. \($X_6 ≥ X_4 + X_5 - 1$\)

1. Mixed-integer linear optimization model to find the minimum cost plan:

Let X be a binary decision variable, indicating whether each power plant is on or off. Then, we can use the following mathematical formulation for the problem:

minimize \($∑_{i=1}^{7} s_i X_i +∑_{i=1}^{7} c_i Y_i$\)

Subject to:

\($∑_{i=1}^{7} l_i X_i ≤ 424$\)

\(∑_{i=1}^{7} u_i X_i ≥ 424$\)

\(X_i$ ∈ {0,1} ∀ i$\)

\(Y_4+Y_5-2Y_6 ≤ 0$\)

\(Yi ≤ 424 ∀ i$X_3+X_7 ≤ 1$\)

2. Adding a Linear Constraint:

At least three plants should be turned on, which means we want\($∑_{i=1}^{7} X_i ≥ 3$\).

3. Adding a Linear Constraint:

Plant 3 and 7 can not be both turned on. This implies the linear constraint:\($X_3 + X_7 ≤ 1$\).

4. Adding a Linear Constraint:

When plants 4 and 5 are on, then plant 6 must also be on. This implies the linear constraint:\($X_6 ≥ X_4 + X_5 - 1$\).

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Answer:

The brain is controlling the movement and it’s called the nervous system

Explanation:

I took the test

1. 0.3 solar masses (Most common - These are the smallest, most common stars in the Universe, known as red dwarfs.)

Solar mass is a unit of measurement used in astronomy. It is equal to the mass of the Sun and is used to measure the mass of other celestial bodies, such as stars, planets, and galaxies. The solar mass is equal to 1.989 × 10^30 kg, or approximately 333,000 times the mass of the Earth. Solar mass is also used to calculate the gravitational force of bodies in the universe, and to measure the amount of energy produced by stars. Solar mass is an important concept in astrophysics and is used to study the structure and evolution of stars and galaxies.

2. 1 solar mass (Common - These stars, like our Sun, are the most common stars in the Universe, accounting for about 73% of the stars in the Milky Way.)

3. 5 solar masses (Less Common - These stars are less common, accounting for about 17% of stars in the Milky Way.)

4. 20 solar masses (Least Common - These are the most massive stars in the Universe, and they are the least common, accounting for only 0.08% of stars in the Milky Way.)

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Complete Question:
Arrange the following star masses by how common the stars are in the Universe, from most common to least common.

1. 0.3 solar masses

2. 1 solar mass

3. 5 solar masses

4. 20 solar masses

Explanation:

Body systems work together to perform all the functions necessary for the survival of

An organism

C. Explain why the failure of one organ or organ

system can affect the function of other body

systems in an organism.

The water budget equation for the Creek drainage basin is: Precipitation = Stream discharge + Evapotranspiration ± Change in storage.

To develop the water budget equation for this problem, we need to account for the inputs and outputs of water in the Creek drainage basin. The water budget equation can be expressed as,

P = Q + ET ± ΔS

P = Precipitation input (mm)

Q = Stream discharge (m³/s)

ET = Evapotranspiration (mm)

ΔS = Change in storage (mm)

First, let's convert the units of the given values,

Precipitation input (P) = 550 mm

Stream discharge (Q) = 1.8 m³/s

Now, let's determine the evapotranspiration (ET) and change in storage (ΔS) terms. However, the problem doesn't provide information about ET, so we cannot calculate it accurately. The problem doesn't provide information about ΔS, so we cannot calculate it accurately.

Given these limitations, we can write the simplified water budget equation for this problem,

550 mm = 1.8 m³/s + ET ± ΔS

Please note that without information about evapotranspiration and changes in storage, we cannot fully determine the water budget for the Creek drainage basin.

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The range of the shots(projectiles) will be around 131.65 meters when the point of the cannon is set to 20 degrees above level. 

To decide the run of the shots, we have to calculate the horizontal distance that the shots will travel.

Ready to utilize the taking after kinematic condition to fathom for the run:

\(R = (v^2/g) * sin(2θ)\)

Where:

R = run

v = starting speed (25 m/s)

g = increasing speed due to gravity (9.81 m/s²)

θ = point of the cannon (20 degrees)

Substituting the given values into the condition, we get:

\(R = (25^2/9.81) * sin(2*20)\)

R = 131.65 meters

In this manner, the run of the shots will be around 131.65 meters. 

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Answer:

Force applied

Explanation:

An object will remain at its state of rest unless a non zero for act on it

The force exerted by each wire on the other is 2.646N and it is away from each other.

The distance between the parallel power lines is 40cm and they are of a length of 270m each.

The current in the power line is 140A.

The force on each power line due to another can be given by,

F = uI₁I₂L/2πr

Where,

I₁ and I₂ are the current in the line,

L is the length of the wire,

r is the distance between them,

Putting values,

F = 4 x π x 10⁻⁷ x 140 x 140 x 270/2 x π x 0.4

Solving further,

F = 2.646 N.

The force will be away from each other because the current is in same direction. The magnitude of the force will remain same, whatever direction of the current may be.

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Answer:

element name = neon

no of proton = 10

no. if neutron = 9

atomic no. = 10

atomic weight = 20.17179u

it lies in group 18 and period 2

it is nonmetal because it is a noble gas .

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Answer: Convection currents in the molten mantle cause the plates to slowly move about the Earth a few centimeters each year. Many ocean floor features are a result of the interactions that occur at the edges of these plates.

Explanation:

The convection currents can be seen in a crowd, in the ocean, and can also be felt underground.

A convection current simply means the process that has to do with the movement of energy from one particular place to another.

A convention current is also known as convection heat transfer. Convention currents are due to differential heating. This brings about the circulation patterns that are referred to as convection currents that can be found in the atmosphere, water, and the mantle.

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Answer: 60cm^3

Explanation:

Here we can use the relationship:

Density = mass/volume.

We know that density = 5g/cm^3 and mass = 50g, then we have:

5g/cm^3 = 50g/V

V = 50g/5g/cm^3 = 10cm^3

Then, when we introduce it in a cylinder with 50cm^3 of water, this is heavier than water (the density of the water is 1g/cm^3) it will sink, and the complete volume will be equal to the volume of the water plus the volume of the object:

Total Volume = 50cm^3 + 10cm^3 = 60cm^3

Taking into account the definition of calorimetry, the final temperature of the water is 39.38 °C.

Calorimetry is the measurement and calculation of the amounts of heat exchanged by a body or a system.

Sensible heat is defined as the amount of heat that a body absorbs or releases without any changes in its physical state (phase change). The equation that allows to calculate heat exchanges is:

Q = c× m× ΔT

where Q is the heat exchanged by a body of mass m, made up of a specific heat substance c and where ΔT is the temperature variation.

In this case, you know:

Replacing in the expression to calculate heat exchanges:

For copper calorimeter: Qcopper= 420 J/kg K× 0.027 kg× (Final temperature of copper - 293 °C)

For water: Qwater= 4200 J/kg K× 0.020 kg× (Final temperature of water - 315°C)

If two isolated bodies or systems exchange energy in the form of heat, the quantity received by one of them is equal to the quantity transferred by the other body. That is, the total energy exchanged remains constant, it is conserved.

Then, the heat that the copper calorimeter gives up will be equal to the heat that the water receives. Therefore:

- Qcopper = + Qwater

-420 J/kg K× 0.027 kg× (Final temperature of copper - 293 °C)= 4200 J/kg K× 0.020 kg× (Final temperature of water - 315°C)

Solving, considering Final temperature of copper= Final temperature of water= Final temperature

- 11.34 J/K × (Final temperature- 293 K)= 84 J/K× (Final temperature- 315 K)

- 11.34 J/K ×Final temperature- (-11.34 J/K)× 293 K= 84 J/K× Final temperature- 84 J/K×315 K

- 11.34 J/K ×Final temperature + 3,322.62 J= 84 J/K× Final temperature- 26,460 J

84 J/K× Final temperature + 11.34 J/K ×Final temperature= 3,322.62 J + 26,460 J

95.34 J/K ×Final temperature= 29,782.62 J

Final temperature= 29,782.62 J ÷95.34 J/K

Final temperature= 312.38 K= 39.38 °C

Finally, the final temperature of the water is 39.38 °C.

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Answer:

Effects of Interia

As a more familiar example of inertia, think about riding in a car. ... If the car comes to a sudden stop, your body tends to keep moving forward. When the car starts moving again, your body tends to stay at rest. You move forward because the car seat exerts an unbalanced force on your body.

According to Newton's third law, action and reaction are equal and opposite.

According to Newton's third law, action and reaction are equal and opposite.

When the car suddenly stops due to the braking force, a reaction force counterbalances it which tends to move the passengers forward hence they all jolt forward.

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Answer:

The doctors could see if her cells are getting the molecules they need from food and air

Explanation:

The doctors could see if her cells are getting the molecules they need from food and air. Doing so allows the doctors a general overview of how well her body's biological systems are performing since the basic necessities of the human system are food and oxygen. Therefore if the body is receiving both food and oxygen properly and distributing it properly and efficiently as well without any problems then the most likely outcome is that she is healthy enough to perform her tasks in the submarine under more pressure.

Answer:

The doctors could see if her cells are getting the molecules they need from food and air

Explanation:

Since the ladder is leaning against a smooth vertical wall, there will be no frictional force acting in the vertical direction. However, there will be a force of friction acting in the horizontal direction due to the roughness of the ground.

In the case of a ladder that is resting on rough ground and leaning against a smooth vertical wall, the force of friction will act in a direction opposite to the ladder's motion or tendency to move. This is because the force of friction always opposes the direction of motion or tendency to move. This force of friction will act to prevent the ladder from slipping or sliding along the ground, ensuring that it remains in place and leaning against the wall. The magnitude of this force of friction will depend on the weight of the ladder and the roughness of the ground.

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The time in which the car reaches it maximum Haight is ≈1.8 seconds.

We know that when the car leaves the ramp , it will move in upward direction and forward direction .

velocity of moving forward=  v cos(a).......(initial velocity of moving front)

velocity of moving  upward = v sin(a).......(initial velocity of moving up)

v is the  initial velocity of car(30m/s), a is the angle of ramp(37°).

velocity of moving up for car at Max. hight = 0m/s

We know that,

final velocity=initial velocity - gt (g is acceleration due to gravity, t is time)

when something moves upward .

so,

0=v sin(a)-9.8t

t≈1.8 seconds

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In that amount of time, the ball will travel 250 meters.

We refer to uniform acceleration as the process through which an object's speed (velocity) increases at a constant pace. The acceleration rate is constant. A car's acceleration is not consistent if it accelerates quickly before slowing down.

The three main categories of accelerated motions are uniform, non-uniform, and average acceleration. When an item moves in a straight path with an increase in speed occurring at regular intervals of time, this motion is referred to as having uniform acceleration.

According to the question -

u = 10 m/s

t = 25 s

Therefore -

Distance = u x t = 10 x 25 = 250 meters.

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Answer:

scalar

Explanation:

pounds is a unit of mass, and mass is a scalar quantity.

if it was weight (in newtons) it would be a vector.

A 5000-pound car sitting in the last parking space in the block is a scalar quantity, not a vector quantity.

The scaler quantity is only the quantity having some amount of magnitude but not direction and vector quantity is that which consists of both magnitude and the direction with them.

In 5000 pound car sitting in the last parking space in the block, it has a magnitude of 5000 pounds but does not have any direction to move and it comes under the scalar quantity.

Therefore, a car has scalar quantity not vector if, a 5000-pound car sitting in the last parking space in the block.

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