which of the following ionic compounds would be expected to have the most exothermic lattice energy?

a. (i) to determine the distance from the graph is calculate the area in the graph

a. (ii) Calculate the area of triangle, where x = 15 and y = 3. So the distance travelled in the first 15s is \(\frac{1}{2}.a.t = \frac{1}{2}.15.3=22.5m\)

b. (i) at 10 s the velocity of train is 2 m/s. The acceleration calculated by \(a=\frac{v}{t} =\frac{2}{10}=0.2 m/s^{2}\)

b. (ii) The unbalanced force calculate by \(F=m.a = 120.000 . (0.2)=24kN\)

c. Momentum can be calculated by \(p=m.v=(120.000).(2)=240.000 \frac{kg.m}{s}\)

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Answer:

Number of electron wavelength will Double

Explanation:

let the radius = r  and wavelength = λ

when R doubles and  λ ( wavelength ) remains the same

The number of electron electron wavelengths will double as well

Using Bohr's angular momentum quantization to show this

attached below

Answer:

E = 73.5 J

Explanation:

Given that,

Mass of a marble, m = 5 kg

It is placed at the edge of a 1.5 m table

We need of find the gravitational potential energy of the marble. It is given by the formula as follows :

E = mgh

E = 5 kg × 9.8 m/s² × 1.5 m

E = 73.5 J

So, the potential energy of the marble is 73.5 J.

Answer:

D

Explanation: Given that a student leaves their history classroom and walks 20 meters north to a drinking fountain. Then the student turns and walks 50 meters south to their art classroom.

The distance is a scalar quantity.

The distance = 50 + 20

distance = 70 metres

Therefore, the magnitude of the total distance traveled by the student is 70 metres. Which is option D

According to  Taylor Series, The Answer is False.

If p(x) is the Taylor series for f centered at 0, then it is valid only for values of x near 0. If we substitute x - 1 into the Taylor series for p(x), we get a new function:

 \(p(x-1) = f(0) + f'(0)(x-1) + (1/2)f''(0)(x-1)^2 +\)...

This new function is the Taylor series for f(x) centered at x = 1, not at x = 0. Therefore, p(x-1) is not necessarily a valid Taylor series for f(x) centered at 0.

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Answer:

D

Explanation:

light moves in a straight line (sorry if I'm wrong)

If a  student wants to draw a diagram to show the path of a light wave would be an arrow starting at the wave source and pointing away from it , therefore the correct answer is option D.

Science is the methodical, empirically-based pursuit and application of knowledge and understanding of the natural and social worlds.

A method of learning about the world is science. Science allows people to participate in the creation of new knowledge as well as use that knowledge to further their goals.

If a  student wants to draw a diagram to show the path of a light wave would be an arrow starting at the wave source and pointing away from it, therefore the correct answer is option D.

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The gain in momentum of vehicle B is 4000 kg•m/s

The total change in momentum due to the collision is zero.

According to the principle of momentum conservation, momentum is only modified by the action of forces as they are outlined by Newton's equations of motion; momentum is never created nor destroyed inside a problem domain.

As no external force applied, total momentum during collision remains conserved.

Hence, the gain in momentum of vehicle B = the loss  in momentum of vehicle C

=  4000 kg•m/s

And,  the total change in momentum due to the collision is zero.

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Explanation:

Newton's third law states that " Every action has an equal and opposite reaction ".

Since, the Tension force acting on the rope is same.

So, the net force is the same everywhere along the entire rope.

Use Newton's third law to construct an argument that the net force is the same everywhere along the entire rope. The argument is tension force acting on the rope is same so net force is same.

A force is an effect that can alter an object's motion according to physics. An object with mass can change its velocity, or accelerate, as a result of a force. An obvious way to describe force is as a push or a pull. A force is a vector quantity since it has both magnitude and direction.

Newton's third law states that " Every action has an equal and opposite reaction ".

Since, the Tension force acting on the rope is same.

So, the net force is the same everywhere along the entire rope.

The argument is tension force acting on the rope is same so net force is same.

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We are given that:

We need to find:

Using equations of motion:

➙ v² - u² = 2as

➙ v = u + at

here,

From the given information, we can conclude that:

Now, using equation of motion:

➝ v = u + at

➝ v = 0 + ( 8 × 1.5 )

➝ v = 0 + 12 .0

➝ v = 12 m/s

For, acceleration :

➝ v² - u² = 2as

➝ ( 12 )² - ( 0 )² = 2 × 8 × s

➝ 144 - 0 = 16s

➝ 16 s = 144

➝ s = 144 / 16

➝ s = 9m

\( \dag\) Since, we take displacement in terms of distance in some places, therefore we can say that the height from which the object was dropped is 9 meters .

The angle θ which the left-hand cable makes with respect to the wall is  17⁰.

The resultant force on the cables is determined by resolving the forces into x and y components as shown below.

y-component of the weight;

Wy = -636 N

y-component of the tension in the right cable;

Ty = 890 x sin(26)

Ty = 390.15 N

x-component of the tension in the right cable;

Tx = 890 x cos(26)

Tx = 799.93 N

y-component of the tension in the left cable;

Ty = T sinθ

x-component of the tension in the left cable;

Tx = -T cosθ

Sum of the forces in y-direction;

∑F_y = 0

T sinθ - 636 + 390.15 = 0

T sinθ - 245.85 = 0

T sinθ = 245.85 -------- (1)

Sum of the forces in x-direction;

∑Fx = 0

-T cosθ + 799.93 = 0

T cosθ = 799.93  -------- (2)

Divide equation (1) by (2)

T sinθ / T cosθ = 245.85/799.93

tanθ = 0.307

θ = arc tan(0.307)

θ = 17.1⁰ ≈ 17⁰

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Answer:

The speed of the water flow in the pipe on the second floor is approximately 13.1 meters per second.

Explanation:

By assuming that fluid is incompressible and there are no heat and work interaction through the line of current corresponding to the pipe, we can calculate the speed of the water floor in the pipe on the second floor by Bernoulli's Principle, whose model is:

\(P_{1} + \frac{\rho\cdot v_{1}^{2}}{2}+\rho\cdot g\cdot z_{1} = P_{2} + \frac{\rho\cdot v_{2}^{2}}{2}+\rho\cdot g\cdot z_{2}\) (1)

Where:

\(P_{1}\), \(P_{2}\) - Pressures of the water on the first and second floors, measured in pascals.

\(\rho\) - Density of water, measured in kilograms per cubic meter.

\(v_{1}\), \(v_{2}\) - Speed of the water on the first and second floors, measured in meters per second.

\(z_{1}\), \(z_{2}\) - Heights of the water on the first and second floors, measured in meters.

Now we clear the final speed of the water flow:

\(\frac{\rho\cdot v_{2}^{2}}{2} = P_{1}-P_{2}+\rho \cdot \left[\frac{v_{1}^{2}}{2}+g\cdot (z_{1}-z_{2}) \right]\)

\(\rho\cdot v_{2}^{2} = 2\cdot (P_{1}-P_{2})+\rho\cdot [v_{1}^{2}+2\cdot g\cdot (z_{1}-z_{2})]\)

\(v_{2}^{2}= \frac{2\cdot (P_{1}-P_{2})}{\rho}+v_{1}^{2}+2\cdot g\cdot (z_{1}-z_{2})\)

\(v_{2} = \sqrt{\frac{2\cdot (P_{1}-P_{2})}{\rho}+v_{1}^{2}+2\cdot g\cdot (z_{1}-z_{2}) }\) (2)

If we know that \(P_{1}-P_{2} = 0\,Pa\), \(\rho=1000\,\frac{kg}{m^{3}}\), \(v_{1} = 15.5\,\frac{m}{s}\), \(g = 9.807\,\frac{m}{s^{2}}\) and \(z_{1}-z_{2} = -3.5\,m\), then the speed of the water flow in the pipe on the second floor is:

\(v_{2}=\sqrt{\left(15.5\,\frac{m}{s} \right)^{2}+2\cdot \left(9.807\,\frac{m}{s^{2}} \right)\cdot (-3.5\,m)}\)

\(v_{2} \approx 13.100\,\frac{m}{s}\)

The speed of the water flow in the pipe on the second floor is approximately 13.1 meters per second.

The phrase "parallel adaptive fluid–structure interaction simulation of explosions impacting on building structures" refers to a computational method used to study the effects of explosions on buildings. Let's break it down step by step:

"Parallel adaptive": This refers to the use of parallel computing techniques, where multiple processors or cores work together to solve the simulation problem faster. It allows for efficient computation of complex simulations by dividing the workload.

"Fluid–structure interaction": This term describes the interaction between a fluid (such as air or water) and a solid structure (such as a building) in a simulation. It considers how the fluid affects the structure and vice versa. In this case, it refers to how the explosion impacts the building and how the building responds to the explosion.

"Simulation of explosions impacting on building structures": This means that the simulation aims to model the effects of explosions on buildings. It can help researchers and engineers understand how buildings behave under explosive forces, and can be used to design safer structures or develop strategies to mitigate the damage caused by explosions.

The phrase refers to a computational method that uses parallel computing techniques to simulate the interaction between fluids and structures, specifically focusing on explosions impacting building structures. This simulation can provide valuable insights into the behavior of buildings under explosive forces.

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I don't have personal experiences or expectations. However, I can explain what equipotentials are and how they relate to predictions.

Equipotentials are imaginary lines that connect points with equal potential energy in a given electric field. These lines help visualize how the electric field changes and how charges move within the field.

To predict the shape and behavior of equipotentials, one needs to consider the distribution of charges and the geometry of the system. If the charge distribution and geometry are known, then the equipotentials can be calculated mathematically.

The agreement between predicted and observed equipotentials depends on the accuracy of the assumptions and measurements made. So, whether the equipotentials match predictions or not depends on the specific case and how well the factors affecting the electric field are understood.

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Answer:

Chemical, mechanical, thermal i guess

The number of turns a solenoid of cross-sectional area 0.035 m² and length 0.39 m should have if its inductance is to be 48 mH is approximately 328 turns.

To determine the number of turns in the solenoid, we can use the formula for inductance:

L = (μ₀ * N² * A) / l

where L is the inductance (48 mH), μ₀ is the permeability of free space (4π × 10⁻⁷ Tm/A), N is the number of turns, A is the cross-sectional area (0.035 m²), and l is the length (0.39 m).

Rearranging the formula to solve for N:

N = √(L * l / (μ₀ * A))

Plugging in the values:

N = √((48 × 10⁻³ H) * (0.39 m) / (4π × 10⁻⁷ Tm/A * 0.035 m²))

Calculating N, we get:

N ≈ 328 turns

So, the solenoid should have approximately 328 turns to achieve an inductance of 48 mH.

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Answer:

t = 2 seconds

Explanation:

In 2nd question, the question is given the attached figure.

Initial speed of the bus, u = 0

Acceleration of the bus, a = 8 m/s²

Final speed, v = 16 m/s

We need to find the time taken by the car to reach the stop. Acceleration of an object is given by :

\(a=\dfrac{v-u}{t}\)

t is time taken

\(t=\dfrac{v-u}{a}\\\\t=\dfrac{16-0}{8}\\\\t=2\ s\)

The bus will take 2 seconds to reach the stop.

The longest wavelength that is required to break the bond is 448 nm.

The term pi bond has to do with a multiple bond. In chemistry, there are basically two kinds of bonds which are the pi bond and the sigma bonds. The sigma bonds are the single bonds.

Actually, the sigma bond is stronger than the pi bond and the pi bond can be broken easily especially when  the compound has been irradiated with a strong light of the appropriate wavelength. The energy that is required to break a pi bond is 4.42*10^-19 J. When this energy is supplied, the pi bond can be broken hence the wavelength that correspond to it is what we seek.

Given that;

E = hc/λ

E  energy

h = Plank's constant

c = speed of light

λ = wavelength

We now have;

λ=hc/E

λ= 6.6 * 10^-34 * 3 * 10^8/4.42*10^-19 J

= 4.48 * 10^-7 m or 448 nm

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Explanation:

amazing that you learned a lot of great ideas on your summary business you well from to and as learned that they can do well with their lives for you in the past few they will be a child whose mass is the best thing) )for

Answer:

It's violet........

Explanation:

This was right for me.

The color of visible light that has a shorter wavelength than blue light is Red. The correct option is A.

The electromagnetic spectrum consists of the range of all types of EM radiation. Radiation is packet of energy that travels and spreads out. It has radio waves, infrared waves and visible light waves, ultraviolet rays and microwaves.

They possess high energy even to penetrate deep within the material. electromagnetic spectrum ranges from longer wavelength and less frequency to shorter wavelength and high frequency.

The light with higher wavelength is Blue and the shorter wavelength is Red and the rest of all spectrum colors are in between.

Thus, the correct option is A.

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Answer:

gravity

Explanation:

Though gravity holds planets, stars, solar systems and even galaxies together, it turns out to be the weakest of the fundamental forces, especially at the molecular and atomic scales.

First consider what you want to achieve, and then commit to it. Set SMART (specific, measureable, attainable, relevant and time-bound) goals that motivate you and write them down to make them feel tangible. Then plan the steps you must take to realize your goal, and cross off each one as you work through them.

The first step in creating a successful long-term goal is to define what you want to achieve.

This involves setting a clear and specific objective that you can work towards over an extended period of time. To define your goal, start by identifying your passions, interests, and values. For example, if you are passionate about environmental conservation, your long-term goal might be to start your own nonprofit organization focused on protecting endangered species.

Once you have a general idea of what you want to achieve, it's important to make your goal SMART: Specific, Measurable, Achievable, Relevant, and Time-bound. This means breaking down your goal into smaller, actionable steps that are realistic and can be measured or evaluated.

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A force of 40.0 N/C is applied to a positively charged test particle positioned at point "p" if a tiny, electrically charged item "a" generates an electric field with a value of 40.0 N/C directed south at point "p" situated 0.250 m directly north of "a."

When there is charge present in whatever form, every point in space has a corresponding electric field. E is a mathematical constant that expresses the strength and direction of an electric field. It is sometimes referred to as electric field strength, electric field intensity, or simply the electric field. An electric field is a type of physical field that contains electrically charged particles that act to either attract or repel other charged particles inside the field (or E-field). It also describes the particle system's physical surroundings.

A property of an electric field known as electric flux can be thought of as the number of electric lines with force (or electric field lines) that span a given area. Electric field lines are assumed to have positive electric charges at their beginnings and negative electric charges at their ends. The term "electric field" refers to the physical field that contains electrically charged particles and acts to either attract or repel all other charged particles inside the field (or E-field). It also describes the particle system's physical surroundings.

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Complete question -

A small object A, electrically charged, creates an electric field. At a point P located 0.250 m directly north of A, the field has a value of 40.0 N/C directed to the south.

What is the charge of object A?

Answer:

probably the trip where it took u 5 seconds

There are a lot of things that could be causing the microphone on your phone to malfunction.

One or more of these issues could be caused by blockages in the microphone, an outdated piece of software, an unreliable third-party app, or faulty hardware. You should begin by determining whether or not the problem is indeed being caused by your microphone.

To begin, you can test the microphone on your phone by recording your voice using any of the recorders on your device. If the phone is able to record the sound of high quality, the microphone probably isn't broken. If everything is working well, you have nothing to worry about and can proceed with the next troubleshooting steps to repair the problem on your own.

1. Restart Your Mobile Device

2. Verify That the Microphone Is Covered by the Phone Protection

3. Verify the Existence of Connected Devices

4. A Microphone That Is Spotless

5. Eliminate All Third-Party Applications

6. Perform Software Updates

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Answer:

k = 100 N/m

Explanation:

The elastic potential energy of a spring is equal to (1/2)kx^2, where k is the spring constant and x is the distance compressed. If the elastic PE is equal to 2J, we can solve for k. Make sure to convert units from cm to m:

(1/2)kx^2 = 2J

kx^2 = 1

k = 1/x^2

k = 1/(0.1)^2

k = 100 N/m

The answers to the questions of the object thrown off a cliff with a horizontal speed of 10 m/s and that reach the ground which is 30 m below after 3 seconds, are:

a. We know:

b. We need to find the initial vertical velocity and the total horizontal distance traveled.

c. To calculate the initial vertical velocity and the total horizontal distance traveled by the object, we need to use the following equations:

\( y_{f} = y_{i} + v_{i_{y}}t - \frac{1}{2}gt^{2} \)   (1)

\( v_{i_{x}} = \frac{x}{t} \)  (2)

d. The initial vertical velocity and the horizontal distance traveled by the object are 4.72 m/s and 30 m, respectively.

a. From the statement, we know:

b. We need to find the initial vertical velocity and the total horizontal distance traveled.

c. To calculate the initial vertical velocity we can use the following equation:

\( y_{f} = y_{i} + v_{i_{y}}t - \frac{1}{2}gt^{2} \)   (1)

Where:

\( y_{f}\): is the final height = 0 m  

\( y_{i}\): is the initial height = 30 m  

\( v_{i_{y}}\): is the initial vertical velocity =?  

g: is the acceleration due to gravity = 9.81 m/s²

t: is the time = 3 s  

And, to find the horizontal distance traveled by the object we need to use the equation:

\( v_{i_{x}} = \frac{x}{t} \)   (2)

Where:

\(v_{i_{x}} \): is the initial horizontal velocity = 10 m/s

x: is the horizontal distance =?

d. The solution to this problem is the following.

\( y_{f} = y_{i} + v_{i_{y}}t - \frac{1}{2}gt^{2} \)  

\( 0 = 30 m + v_{i_{y}}*3 s - \frac{1}{2}*9.81 m/s^{2}*(3 s)^{2} \)

Solving for \(v_{i_{y}}\)

\( v_{i_{y}} = \frac{\frac{1}{2}*9.81 m/s^{2}*(3 s)^{2} - 30 m}{3 s} = 4.72 m/s \)

Hence, the initial vertical velocity is 4.72 m/s.  

\( v_{i_{x}} = \frac{x}{t} \)

\( 10 m/s = \frac{x}{3 s} \)

\( x = 10 m/s*3 s = 30 m \)

Therefore, the horizontal distance traveled by the object is 30 m.

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The net force applied to it is 6311.9 N.

To calculate the net force to the car, first, we need to find the acceleration using the equation of motion.

Force: This as be defined as the product of mass and acceleration of a body. The S.I unit of force is Newton (N)

⇒ Formula

⇒ Where:

From the question,

 ⇒Given:

⇒ Substitute these values into equation 1

⇒ Solve for a

⇒ To get the force, we use the formula below

⇒ Where:

⇒ Given:

⇒ Substitute these values into equation 2

Hence the net force applied to it is 6311.9 N.

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The vis-viva equation can be used to compare two quantities: the periapse radius of a hyperbolic orbit over the planet, represented as rp, and the circular orbit speed at the planet's surface, indicated as vs.

Thus, This equation establishes a connection between an orbit's semi-major axis (a), the gravitational constant (G), the planet's mass (M), and the particular orbital energy of the orbiting object.

v² = GM[(2/r) - (1/a)]

where v is the orbiting object's velocity, r is its distance from the planet's centre, and an is its semi-major axis.

The radius r is equal to the radius of the planet's surface for a circular orbit.

Thus, The vis-viva equation can be used to compare two quantities: the periapse radius of a hyperbolic orbit over the planet, represented as rp, and the circular orbit speed at the planet's surface.

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When both resistors are linked in series, the voltage across R1 is 0.8V and the voltage across R2 is 0.2V.

When series resistors are linked, the overall resistance equals the sum of the individual resistances. The voltage across each resistor may be calculated using Ohm's equation (V = IR).

Given:

R1 = 480 ohms

R2 = 120 ohms

Assume V is the entire voltage across the series circuit.

The current flowing through both resistors is the same since they are linked in series. Let's call this current I.

The voltage across each resistor may be computed using Ohm's law as follows:

V1 = IR1 = voltage across R1

V2 = IR2 = Voltage across R2

We may write: since the current passing through both resistors is the same:

V = V1 + V2

Let us now swap the values:

V = IR1 + IR2

We may rewrite the equation using Ohm's law (V = IR) as:

V = I(R1 + R2)

We may rewrite the equation to find the current (I):

I = V / (R1 + R2)

We can now plug this number back into the V1 and V2 equations:

V1 = I * R1 V2 = I * R2

By changing the value of I, we get:

V1 = (V / (R1 + R2)) * R1 V2 = (V / (R1 + R2)) * R2

Let's compute the voltage across each resistor separately:

V1 = (V / (R1 + R2)) * R1 = (V / (480 + 120)) * 480 = (V / 600) * 480 = 0.8V

V2 = (V/(R1 + R2)) * R2 = (V/(480 + 120)) * 120 = (V/600) * 120 = 0.2V

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