Vi VE
5. A train accelerates from 60 km/h to 150 km/h and travels 600 m. How long does
this motion take?
2.0.6
600 m.

The magnitude of the gravitational force exerted by the wire on the point mass m is: |F| = 2G(M*m/L^2)

To solve this problem, we need to first find the gravitational force exerted by each small segment of the wire on the point mass m, and then integrate the force over the entire semicircle.

Let's consider a small segment of the wire of length dl, located at a distance r from the center of curvature of the semicircle. The mass of this segment can be written as dm = M(dl/L), since the wire is uniform. The gravitational force exerted by this segment on the point mass m is given by:

dF = G*(dm*m)/(r^2)

where G is the gravitational constant.

Substituting dm, we get:

dF = G*(Mm/L)(dl/r^2)

Now we need to integrate this expression over the entire semicircle. Since the wire is bent into a semicircle, the distance r from the center of curvature varies from 0 to L/2. Thus, the total gravitational force exerted by the wire on the point mass m is:

F = integral of dF from r=0 to r=L/2

= G*(Mm/L) * integral of (dl/r^2) from r=0 to r=L/2

= G(Mm/L) * (1/0 - 1/(L/2)^2)

= 2G*(M*m/L^2)

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Hi there!

We can begin by converting 130 km/h to m/s:

\(\frac{130km}{1hr} * \frac{1hr}{3600s} * \frac{1000m}{1km} = 36.11 m/s\)

Find the acceleration associated with this velocity change in the given time frame:

vf = vi + at (vi = 0 m/s)

vf = at

vf/t = a

36.11/80 = 0.45 m/s²

Now, we can calculate Net Force using Newton's Second Law:

∑F = ma

∑F = (1200)(0.45) ≈ 540 N

Answer:

10s

Explanation:

Given parameters:

Initial velocity  = 30cm/s

Acceleration  = 3cm/s²

Unknown:

Time it takes for the car to come to rest  = ?

Solution:

To solve this problem, we apply the right motion equation;

   Our final velocity - 0

So;

       V = U + at

Since the car is slowing down, it will have a negative acceleration

Insert the parameters and solve;

       0 = 30 + (-3) x t

          -30 = -t

              t = 10s

The path that the ball attached to string would most closely follow after the string breaks is B, that is diagonal.

Any object travelling in a circular motion has a linear speed known as tangential velocity. In a single full rotation, a point on the outside edge of a turntable travels further than a point close to the center. This is true of a swinging ball dangling above his head from the end of a thread. The ball abruptly takes off after the string snaps.

The ball is now free from the centripetal force that the string was applying, and it continues to move in a straight line in the direction of the tangential velocity it was travelling at when the string broke. The ball's current tangential velocity was represented as a straight line. The path that the ball would most closely follow after the string breaks is B (diagonal).

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The complete question is:

A steel ball is attached to a string and is swung in a circular path in a horizontal plane as illustrated in the accompanying figure. At the point P indicated in the figure the string suddenly breaks near the ball. If these events are observed directly from above as in the figure, which path would the ball most closely follow after the string breaks?

The greatest distance the person can stand from the mirror and still see their image clearly is 2.0 meters.

The far point of a person's eyes refers to the maximum distance at which they can see objects clearly without the aid of corrective lenses. If the far point is given as 2.0 m, it means that the person can see objects clearly up to a distance of 2.0 m.

To determine the greatest distance the person can stand from the mirror and still see their image clearly, we need to consider the concept of the virtual image formed by a mirror. When we look into a mirror, our eyes perceive a virtual image as if it were formed behind the mirror.

In this case, the person's eyes can focus clearly up to a distance of 2.0 m. To see their image clearly in the mirror, the person needs the virtual image formed by the mirror to be within this range.

Since the virtual image formed by a mirror is the same distance behind the mirror as the object is in front of it, the person needs to stand at a distance from the mirror equal to the maximum distance they can focus clearly.

Therefore, the greatest distance the person can stand from the mirror and still see their image clearly is 2.0 meters.

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Answer:

Explanation:

The force acting on an object given it's mass and acceleration can be found by using the formula

force = mass × acceleration

From the question we have

force = 69 × 2

We have the final answer as

Hope this helps you

Answer:

The pressure value changes 400 % relative to the initial value.

Explanation:

Let suppose that the gas behaves ideally and represents a closed system, that is, a system with no mass interactions so that number of moles is conserved (\(n\)). Since the variables involved in the isothermal process are pressure (\(P\)) and volume (\(V\)). Finally, the process is represented by the following relationship:

\(P_{1}\cdot V_{1} = P_{2}\cdot V_{2}\) (1)

Where:

\(P_{1}, P_{2}\) - Initial and final pressures.

\(V_{1}, V_{2}\) - Initial and final volumes.

If we know that \(P_{1} = P_{o}\), \(V_{1} = V_{o}\) and \(V_{2} = 0.2\cdot V_{o}\), then the final pressure of the closed system is:

\(P_{2} = P_{1}\cdot \left(\frac{V_{1}}{V_{2}} \right)\)

\(P_{2} = 5\cdot P_{o}\)

The pressure value changes 400 % relative to the initial value.

The density of the N nucleus can be calculated by dividing its mass by its volume, the binding energy per nucleon E of the lithium isotope Li is \(5.6 MeV/nucleon\), the energy needed to remove a proton from the nucleus of the potassium isotope K is \(289.77 MeV\)

The mass number of N is 14 and its atomic number is 7. The number of neutrons in the N nucleus is given by \(14 - 7 = 7\) neutrons.

The mass of one neutron is about 1.008665 atomic mass units (amu) or \(1.67493 \times 10^{-27} kg\).

The mass of the N nucleus = \(7(1.008665) + 7.016004 = 14.04273 $ amu\). Thus, the density of the N nucleus can be calculated by dividing its mass by its volume.

The binding energy per nucleon E of the lithium isotope Li is 5.6 MeV/nucleon. To find its atomic mass of this isotope, the mass defect of the nucleus is calculated using the formula:

Mass defect = (Zmp + Nmn) - M

where

The mass of a proton is approximately \(1.00728 amu\), while the mass of a neutron is approximately \(1.00866 amu\).

The energy needed to remove a proton from the nucleus of the potassium isotope K can be calculated using the formula:

Binding energy = \(E \times A\)

where E is the binding energy per nucleon, A is the mass number. Binding energy of K isotope = 7.43 MeV/nucleon (given)

Thus, the energy needed to remove a proton from the nucleus of the potassium isotope K is \(289.77 MeV\).

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Answer:

11196.14 m

Explanation:

From the question given above, the following data were obtained:

Horizontal velocity (u) = 286.2 m/s

Height (h) = 7500 m

Horizontal distance (s) =?

Next, we shall determine the time taken for the payload to get to the target. This can be obtained as follow:

Height (h) = 7500 m

Acceleration due to gravity (g) = 9.8 m/s²

Time (t) =?

h = ½gt²

7500 = ½ × 9.8 × t²

7500 = 4.9 × t²

Divide both side by 4.9

t² = 7500 / 4.9

Take the square root of both side

t = √(7500 / 4.9)

t = 39.12 s

Finally, we shall determine the horizontal distance as follow:

Horizontal velocity (u) = 286.2 m/s

Time (t) = 39.12 s

Horizontal distance (s) =.?

s = ut

s = 286.2 × 39.12

s = 11196.14 m

Thus the payload will travel 11196.14 m horizontally in order to hit the target

The rates of conversion and dissipation of energy can be found using the following equations:

Power = Voltage x Current

Power = Current^2 x Resistance

where power is the rate of energy conversion or dissipation in watts (W), voltage is the potential difference in volts (V), current is the flow of electric charge in amperes (A), and resistance is the opposition to the flow of current in ohms (Ω).

Assuming a battery of voltage V and internal resistance R is connected to an external resistor of resistance r, with a current I flowing through the circuit, we can use the following expressions to calculate the rates of energy conversion and dissipation:

Rate of conversion of internal energy to electrical energy in the battery:

P1 = VI

Rate of dissipation of electrical energy in the battery:

P2 = I^2R

Rate of dissipation of electrical energy in the external resistor:

P3 = I^2r

Note that the total power supplied by the battery must equal the total power dissipated in the circuit, according to the principle of conservation of energy.

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The correct answer is e. None of the above alternatives gives a true statement. None of the statements in options a, b, c, and d are true when it comes to a modulus M over a ring R having a finite basis.

When a modulus M can be formed entirely from a finite set of elements, the modulus M is said to be finitely generated. M's finite basis does not, however, automatically imply that M is finitely generated. A basis is a set of linearly independent elements, and it might not be enough to produce all of the components of the modulus.

According to the assertion in option b, M must include nonzero items of nonzero order if it has a finite basis. This is untrue, though. The smallest positive number k, such that the element raised to the power of k equals the identity element, is referred to as the order of an element.

According to option c, every non-null element in a modulus with a finite basis has a null. Nevertheless, this claim is likewise untrue. It is possible for a modulus with a finite basis to have non-null elements without a null element.

According to option d, a ring R is a body, or a field, and only then can a modulus have a finite basis. However, this assertion is also untrue. Even though the ring R is not a field, a modulus can nonetheless have a finite basis. None of the given alternatives provides a true statement about a modulus M over a ring R having a finite basis.

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The horizontal component would be

(77.02 m/s) cos(34°) ≈ 63.85 m/s

The specific heat capacity is like having capacity to acquire or absorb heat. Because of this, object A will have higher specific heat capacity than object B

The specific heat capacity of a substance is the quantity of heat required to raise the temperature of unit mass of the substance by one kelvin.

Given that Object A and object B are both heated to 200 Celsius. Object A must absorb 4,000J of heat energy to reach a temperature of 200 Celsius, while object B must absorb 2,500J of heat energy to reach a temperature of 200 Celsius.

Since both are heated to the same temperature, that mean object A has large heat capacity to absorb 4,000J of heat energy to reach a temperature of 200 Celsius. While object B has a less heat capacity to absorb 2,500J of heat energy to reach a temperature of 200 Celsius.

Therefore, object A has the higher specific heat capacity than object B

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The Hayashi model is a theoretical model used to describe the temperature distribution and conditions in the protoplanetary disk. However, it does not provide explicit information about the gas-solid interaction regimes or the particle size boundaries.

To determine the particle radius on the boundaries between the different regimes, we need to consider the relevant laws and models related to gas-solid interactions.

Regime (1): Epstein Law

Regime (II): Stokes Law

Regime (III): Ideal Fluid

In the context of gas-solid interactions, these regimes represent different flow regimes based on the size of solid particles and the behavior of the gas surrounding them.

The Epstein Law (Regime 1) applies when the mean free path of gas molecules is greater than the particle radius, and individual gas molecules collide with the particle. In this regime, the gas behaves like individual particles.

Stokes Law (Regime II) applies when the particle size is large enough that gas molecules can no longer individually collide with the particle but instead adhere to its surface, causing a viscous drag. In this regime, the gas behaves like a viscous fluid.

The Ideal Fluid (Regime III) represents the limit where the particle size is large enough that the gas behaves like an ideal fluid, and the viscous drag becomes negligible.

To determine the particle radius on the boundaries between these regimes in the Hayashi model, more specific information about the model is needed. The Hayashi model is a theoretical model used to describe the temperature distribution and conditions in the protoplanetary disk. However, it does not provide explicit information about the gas-solid interaction regimes or the particle size boundaries.

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Answer:

the speed that the car is going at an instant of time is called the instantaneous speed.

When the rocket is very far away from the Earth, its speed will approach zero. As the rocket moves away from the Earth's surface, it will be subject to the gravitational pull of the Earth, which will gradually decrease as the distance between the rocket and the Earth increases.

The gravitational force is inversely proportional to the square of the distance between two objects. Therefore, as the rocket moves farther away, the gravitational force acting on it decreases, leading to a decrease in acceleration. Eventually, at a very large distance from the Earth, the gravitational force becomes negligible, and the rocket's acceleration approaches zero.

According to the law of conservation of energy, the total mechanical energy of the rocket is conserved throughout its motion. Initially, the rocket has kinetic energy due to its high speed. However, as it moves away from the Earth, its potential energy increases while its kinetic energy decreases. Eventually, when the rocket is very far away, its kinetic energy approaches zero, which corresponds to its speed approaching zero. Therefore, the speed of the rocket when it is very far away from the Earth is effectively zero.

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The acceleration of an object is directly related to the net force exerted upon it and inversely related to the mass of the object.

answer : directly , inversely

Answer:

The kinetic energy of an object is directly proportional to the square of its speed. That means that for a twofold increase in speed, the kinetic energy will increase by a factor of four.

Found it on the internet

Explanation:

Hope this helps dude

Explanation:

because its speed (v) is 0

Answer:

b

Explanation:

Answer:

We don't know how much it cost bc u didn't give us a number of how much one person cost or any details but if you add both of the balls together they have 1,400 balls

To calculate the cost of paintballing for Ryan and his dad, we need to know the cost per paintball. Once we have that information, we can multiply it by the total number of paintballs they used (700 balls each).

Let's say the cost per paintball is $0.50.

For Ryan:

Cost for Ryan = Cost per paintball × Number of paintballs used by Ryan

Cost for Ryan = $0.50/ball × 700 balls = $350

For his dad:

Cost for Dad = Cost per paintball × Number of paintballs used by Dad

Cost for Dad = $0.50/ball × 700 balls = $350

Total cost for both of them:

Total Cost = Cost for Ryan + Cost for Dad

Total Cost = $350 + $350 = $700

So, the total cost of paintballing for Ryan and his dad is $700, assuming the cost per paintball is $0.50.

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The substance that is the best transmitter of solar energy is glass.

Solar energy is an effective and renewable energy source that is harnessed in a variety of ways. In order to utilize solar energy in the most efficient way possible, it is necessary to determine which substance is the best transmitter of this energy. Among all substances, glass is the best transmitter of solar energy. Glass is transparent, which means that it allows sunlight to pass through it. In fact, it transmits about 90% of the sunlight that falls on it. Glass also traps the remaining heat, which is why it is an ideal material for greenhouses and solar panels. A greenhouse is a structure that is built with glass walls and roofs in order to grow plants. The glass walls and roofs trap the sunlight, which heats up the inside of the greenhouse. This allows plants to grow in a controlled environment that is not affected by changes in the weather. A solar panel is a device that converts sunlight into electrical energy. The solar panel is made up of photovoltaic cells, which are made of silicon and other materials that absorb sunlight. When the sunlight is absorbed by the photovoltaic cells, it creates an electric current that can be used to power a variety of devices.

In conclusion, glass is the best transmitter of solar energy. It transmits about 90% of the sunlight that falls on it and traps the remaining heat, making it an ideal material for greenhouses and solar panels. By using glass, we can harness the power of the sun in a variety of ways that are efficient, effective, and environmentally friendly.

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Lebogang says that when you use a thick syringe to "drive" a thin syringe, you lose strength but gain distance. Jaamiah disagrees this means that there is indeed a mechanical advantage, but a distance disadvantage.

A syringe is a medical device that is used for injecting liquids into or extracting liquids from the body. It typically consists of a cylindrical barrel, a plunger, and a needle. The barrel is usually made of plastic or glass and is marked with volume measurements. The plunger fits inside the barrel and can be pushed or pulled to draw or expel liquid. The needle is attached to the end of the barrel and is used to penetrate the skin or other tissue to inject or extract the liquid.

Syringes are commonly used in medical settings for a variety of purposes, such as administering vaccines, medications, or anesthesia. They can also be used to remove fluid from the body, such as in the case of draining abscesses or collecting blood samples for testing.

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Complete Question: -

Lebogang says that when you use a thick syringe to "drive" a thin syringe, you lose strength but gain distance. Jaamiah disagrees. She says that you gain both distance and strength. What do you think, and why do you think so?​

Answer:

Specific heats

Explanation:

The density of the unknown sample is 0.67 g/ml.

To calculate the density, we use the formula:

Density = Mass / Volume

Mass = 38.00 g

Volume = 56.39 ml

Substituting the values into the formula:

Density = 38.00 g / 56.39 ml

Dividing the mass by the volume, we find:

Density = 0.674 g/ml

Rounding to two decimal places, the density of the unknown sample is 0.67 g/ml.

Density is a measure of how much mass is contained within a given volume. In this case, we are given the mass of the unknown sample as 38.00 g and its volume as 56.39 ml. To find the density, we divide the mass by the volume. By performing the calculation, we obtain a density of 0.674 g/ml.

When rounding the value to two decimal places, the density of the unknown sample is 0.67 g/ml. This means that for every milliliter of the sample, there is 0.67 grams of mass. Density is an important property in chemistry and materials science as it can help identify substances and determine their behavior in various applications.

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Answer:

155mEq/L Cl-

Explanation:

A Ringer’s solution contains the following concentrations of cations: 146 mEq/L of Na+, 5 mEq/L of K+, and 4 mEq/L of Ca2+.

As Cl- is the only counterion of those cations:

For Na, the molecule is NaCl and the mEq/L of Cl- = mEq of Na+. The Cl- of the first ion is 146mEq/L Cl-

For K+, The molecule is KCl, mEq Cl- = 5mEq/L Cl-

And, for Ca2+, The molecule is CaCl2 but the equivalents of Ca2+ = Equivalents of Cl- = 4mEq/L Cl-

The total concentration of Cl- are:

146 + 5 + 4 =

Answer:

The force applied to the spring is 35,780 N

Explanation:

Given;

extension of the spring, x = 200 mm = 0.2 m

energy stored in the spring, E = 3578 J

The force applied to the spring is calculated as;

E = ¹/₂Fx

where;

F is the applied force

F = 2E/x

F = ( 2 x 3578) / 0.2

F = 35,780 N

Therefore, the force applied to the spring is 35,780 N

Answer:

Total mechanical energy = 225 J

Explanation:

Given:

Mass of duck (m) = 2 kg

Speed of duck (v)= 5 m/s

Height of duck from ground (h) = 10 m

Gravitation acceleration (g) = 10 m/s²

Find:

Total mechanical energy

Computation:

Total mechanical energy = Kinetic energy + Potential energy

Total mechanical energy = (1/2)mv² + mgh

Total mechanical energy = (1/2)(2)(5)² + (2)(10)(10)

Total mechanical energy = 25 + 200

Total mechanical energy = 225 J

The steam engine was a significant invention that allowed factories to be built anywhere, increasing productivity and efficiency, and contributing to the growth of the Industrial Revolution.

The machine that allowed factories to be built anywhere, powered by coal was the steam engine.

The steam engine, developed by James Watt in the 18th century, was a significant invention that allowed factories to be built anywhere as long as they had access to coal. It was a great breakthrough in the Industrial Revolution that enabled factories to operate efficiently and produce goods at a faster pace.

Explanation: The steam engine, developed by James Watt in 1765, was a significant invention that powered the Industrial Revolution. It was the machine that allowed factories to be built anywhere as long as they had access to coal. It is considered one of the most important inventions of the Industrial Revolution because it replaced water and wind power as the primary energy source. This allowed factories to be built anywhere, even in places that were not close to running water. In addition, the steam engine provided consistent energy, allowing factories to operate efficiently and produce goods at a faster pace.

The steam engine was one of the most critical inventions of the Industrial Revolution, which changed the world's economy and allowed the mass production of goods. It allowed factories to operate continuously, leading to the production of goods at a faster pace. Steam-powered machines, including steam-powered looms and spinning machines, were used to increase productivity and efficiency.

The steam engine's impact on transportation is also undeniable, as it allowed the steamboat and locomotives to operate, making transportation faster and more efficient.

In conclusion, the steam engine was a significant invention that allowed factories to be built anywhere, increasing productivity and efficiency, and contributing to the growth of the Industrial Revolution.

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