10.a wheel with radius 0.33 m and rotational
inertia 2.0 kg.m2 spins on an axle with an
initial angular speed of 3.0 rad/s. friction in
the axle exerts a torque on the wheel,
causing the wheel to stop after 6.0 s. the
average torque exerted on the wheel as it
slows down has magnitude

The symbol "mg/L" in water quality represents milligrams per liter, which is a unit of measurement commonly used to express the concentration of substances in water. Option a is right choice.

The symbol "mg/L" in water quality refers to milligrams per liter, which is a unit of measurement commonly used to express the concentration of substances in water.

This unit represents the number of milligrams of a particular substance that are present in one liter of water.

In the context of water quality, the concentration of various substances is typically measured in parts per million (ppm) or parts per billion (ppb). For example, the concentration of dissolved oxygen in water is typically expressed in milligrams per liter (mg/L), which is equivalent to ppm.

Micrograms per liter (µg/L) is another unit of measurement that is commonly used to express the concentration of substances in water.

However, this unit is typically used for substances that are present in very low concentrations, such as certain pollutants or toxins. In some cases, concentrations may be expressed in parts per trillion (ppt), which is equivalent to µg/L.

Option a is right choice.

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Answer:

If research results can be replicated, it means they are more likely to be correct.

Answer: There are many things that have to be checked in order to know

Explanation:

For repeatability to be established, the following conditions must be in place: the same location; the same measurement procedure; the same observer; the same measuring instrument, used under the same conditions; and repetition over a short period of time.

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Answer:

Car A has a velocity of 40 km/hr  west.

Explanation:

The velocity of an object is a vector quantity. It has both magnitudes as well as direction.

Arrows are used to show direction.

Car A is moving towards west. Car B is moving towards east-south direction. Car C is moving towards South direction. Car E is moving towards North direction.

So, the correct option is (a) i.e. Car A has a velocity of 40 km/hr  west.

The theoretical efficiency is greater than that of the actual efficiency of the engine. This is because heat engine always produces some waste heat.

The Second Law of Thermodynamics states that a heat engine cannot be 100% efficient. In practice, a heat engine is only 100% efficient when it is operating at about 30-50% efficiency.

If we were to multiply this by 100, we would get the efficiency as a percent: 49%. This is the theoretical maximum efficiency. If we were to actually build an engine, it would be less efficient than the theoretical engine. The theoretical engine that can achieve this theoretical maximum efficiency is called the Carnot Engine.

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Answer:

1.23 m/s

Explanation:

p=mv

57.2 = 46.5v

v= 57.2/46.5

v= 1.23

If you want to verify your answer, just insert the value of v in the equation.

The magnitude of force of gravity on an object, mg is called weight of the object on earth.

In physics, gravity (from Latin gravitas 'weight') is a fundamental interaction which reasons mutual enchantment between all matters with mass or strength. Gravity is, by a long way, the weakest of the 4 fundamental interactions, approximately 1038 instances weaker than the strong interaction, 1036 times weaker than the electromagnetic pressure and 1029 times weaker than the weak interaction.

As an end result, it has no significant have an impact on at the level of subatomic debris. but gravity is the most significant interaction among objects at the macroscopic scale, and it determines the movement of planets, stars, galaxies, or even mild.

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Complete Question: -

The magnitude of the force of gravity on an object, mg", is called the object's.

Answer:

Approximately \(5.11 \times 10^{-19}\; {\rm J}\).

Explanation:

Since the result needs to be accurate to three significant figures, keep at least four significant figures in the calculations.

Look up the Rydberg constant for hydrogen: \(R_{\text{H}} \approx 1.0968\times 10^{7}\; {\rm m^{-1}\).

Look up the speed of light in vacuum: \(c \approx 2.9979 \times 10^{8}\; {\rm m \cdot s^{-1}}\).

Look up Planck's constant: \(h \approx 6.6261 \times 10^{-34}\; {\rm J \cdot s}\).

Apply the Rydberg formula to find the wavelength \(\lambda\) (in vacuum) of the photon in question:

\(\begin{aligned}\frac{1}{\lambda} &= R_{\text{H}} \, \left(\frac{1}{{n_{1}}^{2}} - \frac{1}{{n_{2}}^{2}}\right)\end{aligned}\).

The frequency of that photon would be:

\(\begin{aligned}f &= \frac{c}{\lambda}\end{aligned}\).

Combine this expression with the Rydberg formula to find the frequency of this photon:

\(\begin{aligned}f &= \frac{c}{\lambda} \\ &= c\, \left(\frac{1}{\lambda}\right) \\ &= c\, \left(R_{\text{H}}\, \left(\frac{1}{{n_{1}}^{2}} - \frac{1}{{n_{2}}^{2}}\right)\right) \\ &\approx (2.9979 \times 10^{8}\; {\rm m \cdot s^{-1}}) \\ &\quad \times (1.0968 \times 10^{7}\; {\rm m^{-1}}) \times \left(\frac{1}{2^{2}} - \frac{1}{8^{2}}\right)\\ &\approx 7.7065 \times 10^{14}\; {\rm s^{-1}} \end{aligned}\).

Apply the Einstein-Planck equation to find the energy of this photon:

\(\begin{aligned}E &= h\, f \\ &\approx (6.6261 \times 10^{-34}\; {\rm J \cdot s}) \times (7.7065 \times 10^{14}\; {\rm s^{-1}) \\ &\approx 5.11 \times 10^{-19}\; {\rm J}\end{aligned}\).

(Rounded to three significant figures.)

Answer:

Fusion

Fission

Explanation:

The first problem describes a nuclear fusion process. In this process;

The second problem describes nuclear fission,

Answer:

1. f=1T. where: f is the frequency of the wave in hertz. T is the period of the wave in seconds.

2. f=vλ where: f is the frequency of the wave in hertz. v is the velocity of the wave in meters per second. λ is the wavelength of the wave in meters

3. f=cλ

Explanation:

Answer:

As you increase the temperature of a gas, its particles get more kinetic energy and move faster.

I’ll assume you know what KE is.

Consider a sample of confined gas, liquid, or solid material that’s not going anywhere. We may know it’s mass but since it’s not going anywhere, we conclude the sample has zero velocity and KE is zero.

Long ago it was noticed that a sample like this actually had parts and that they were moving. Each part of the sample had a part of the mass and all those random velocities had a combined Internal KE.

More KE in a particle also carried more momentum. So collisions involved more impulse … to each other and to what ever they touched. This causes more pressure to gas samples, more volume in most liquids and solids.

Put your skin on the surface and your nervous system responds to that impact too. We build devices that survive more extremes than our bodies and report more consistent results. We keep the ones that tend to agree with each others’ response and find those that have use in extreme conditions.

Watching a thermometer reading is a measure of its temperature. The laws of motion predict that the average KE of the device will become the same as its surroundings. An outdoor thermometer may be used to gauge the air temperature; but that is inaccurate when it is also gaining KE by being in sunlight or losing by rain evaporation or snow.

Answer:

Red

Orange

Yellow

Green

Blue

Indigo

Violet

shortest wavelength: violet (380 nanometers)

¯\(°_o)/¯

Answer:

Red    Orange    Yellow    Green   Blue   Indigo    Violet

violet has the shortest wavelength

happy to help :)

Only it's volume changes. Volume is defined as the space an object takes up. The amount of substance, which is the mass stays the exact same. The amount of force that Earth is pulling the car down (the weight) stays the same.

Answer:

D

Explanation:

a twist is an event that a reader probably wouldn't have been able to predict

The interaction of an attracting or repulsive force between two charged bodies is referred to as an electric force.

This force is comparable to other forces in that it strikes and affects a specific item, and it is simple to illustrate using Newton's law of motion. One of the forces acting on other bodies is the electric force.

Electric force is the interaction of any two charged bodies that is either repellant or attracting. Similar to any force, Newton's laws of motion describe how it affects the target body and how it does so. The list of additional forces that apply to objects includes the electric force.

The electrostatic force between the two electrons is one of repulsion since electrons are negatively charged and items with like charges repel one another.

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From the formula for coulomb's, the formula for k would be k = Fd²/q1q2.

Here, we are required to solve for k from the Coulomb's formula, F=kq1q2/d².

Solving the formula for k, we obtain;

k = Fd²/q1q2

To solve the formula for k, we need to make k the subject of the formula;

F = kq1q2/d²

Then, F × d² = kq1q2

Therefore, to make k the subject of the formula; we divide both sides of the equation by q1q2.

Therefore, k = Fd²/q1q2.

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Complete question

Coulomb's Law is given by the formula

F=kq1q2/d2

The force F between two charges q1 and q2 in a vacuum is proportional to the product of the charges, and is inversely proportional to the square of the distance d between the two charges. Solve the formula for k.

Answer:

its A,D,E

Explanation:

I got 2 right one of them wrong

Answer:

A baseball speeds up as it falls through the air.

Yes.  Forces on the balloon are unbalanced.  

The balloon is speeding up, so we know that the downward force

of gravity is stronger than the upward force of air resistance.

A soccer ball is at rest on the ground.

No. The ball is not accelerating, so we know that the forces on it

are balanced.

The downward force of gravity on the ball and the upward force

of the ground are equal.

An ice skater glides in a straight line at a constant speed.

No. The skater's speed and direction are not changing, so he is not

accelerating.  That tells us that the forces on him are balanced.

A bumper car hit by another car moves off at an angle.

Yes.  The direction in which the car was moving changed.  

That's acceleration, so we know that the forces on it are unbalanced,

at least at the moment of impact.  

A balloon flies across the room when the air is released.

Yes.  The balloon was not moving. But when the little nozzle was

opened, it started to zip around the room.  So its speed changed.

And, as it goes bloozing around the room, its direction keeps changing too.  

There's a whole lot of acceleration going on, so we know the forces on it

are unbalanced.

Explanation:

The same thing could reasonably be said about multicollinearity. Specifically, the reason for this is due to the violation of the assumption of independent predictors.

Let us understand what these terms mean:

In statistical analysis, multicollinearity is the high correlation among predictors in a regression model. It is problematic because of its adverse effects on the model, including making it difficult to determine the effect of an independent variable, coefficients becoming insensitive to small changes in the model, and reducing the reliability of the model.

In regression analysis, independent predictors are those variables that contribute to the prediction of the dependent variable or outcome, and their inclusion in the model improves the accuracy of the prediction of the model.

In a regression model, it is an assumption that predictors are independent, which means that the predictors have little to no correlation with each other. If this assumption is violated, it is known as multicollinearity.

Therefore, the same thing could reasonably be said about multicollinearity. Specifically, the reason for this is due to the violation of the assumption of independent predictors.

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Answer:

Antimony is metalloid

Explanation:

From the properties of the metals given, we can conclude that antimony is pure a metalloid.

A metalloid has the properties of metals and non-metals.

Frozen preparations such as ice cream, sorbet, gelato, granite can be melted and refrozen, except gelato which cannot be melted and refrozen. This is because the ice cream, sorbet, and granite all contain a high content of fat which allows them to melt and refreeze successfully without becoming damaged.

However, the process of freezing the gelato forms tiny ice crystals, which provide its unique texture. If gelato is melted, it will lose its texture and will not re-freeze successfully.A gelato is a dense Italian ice cream that has a creamy texture and has a lower fat content than traditional ice cream. It is made by mixing milk, sugar, and flavorings, such as nuts or chocolate, and then churned to incorporate air into the mixture.

So, the ice cream, sorbet, and granite all contain a high content of fat which allows them to melt and refreeze successfully without becoming damaged.

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Answer:

The particles have more distance in them which impacts the density.

Explanation:

A solid's particles are much more closer together than that of a liquid's particles. Same thing goes for gas particles(they are much more far apart than liquid particles). This is why solids usually are more denser than liquids and gas, due to the way their particles are structured. Hope this helps!

If no heat is lost to the surroundings, the final temperature of the system is 100 C°,  At the final temperature, 0.0214 kg and 0.219 kg kilograms are there of steam and how many of liquid water

heat can be defined as the form of energy that is spontaneously transferred from one object to another object as the differences in temperatures is otherwise called as heat transfer.

The Heat transfer occurs  upto the  equilibrium point of an object has been reached.

Internal Energy is the total amount of energy of all the molecules of a body is the internal energy within the object.

Specific Heat or heat capacity, is   the amount of energy required to produce a unit change in its temperature.

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Answer:

The system software is a collection of programs designed to operate, control, and extend the processing capabilities of the computer itself. System software serves, the interface between the hardware and the end users. Some examples of system software are Operating System, Compilers, Interpreter, Assemblers.

Explanation:

A computer software is a collection of computer programs that provides instructions for a computer on what to do and how to do it. There are two types of software:

1. System Software       2. Application software

1. System software controls the various operations performed by the computer hardware. It helps the user operate the computer system.

2. An application software is used to perform operations for a specific task.

Answer:

1

Explanation:

The frequency of an oscillating body is given by :

f = 1/T

Whre

T is the time period or the periodic time

The product of frequency and the periodic time will be :

\(f\times T\\\\=f\times \dfrac{1}{f}\\\\=1\)

Hence, the required product is equal to 1.

Answer:

the velocity is 4 ms, if it asked for change it be 0 m/s but its asking for velocity so option 4, 4m/s

Explanation:

The correct answer is Option 2: 2 m/s². The acceleration of the object at 8 seconds is 2 m/s². Note that the negative sign indicates that the acceleration is in the opposite direction of the velocity.

To calculate the acceleration of the object at 8 seconds, we need to look at the change in velocity over time (acceleration is the rate of change of velocity).

Given the graph, we can see that at 8 seconds, the velocity of the object is 6 m/s.

Now, let's find the change in velocity between 8 seconds and 10 seconds:

Change in velocity = Final velocity - Initial velocity

Change in velocity = 2 m/s - 6 m/s

Change in velocity = -4 m/s

Next, find the time interval between 8 seconds and 10 seconds:

Time interval = Final time - Initial time

Time interval = 10 s - 8 s

Time interval = 2 seconds

Now, calculate the acceleration:

Acceleration = Change in velocity / Time interval

Acceleration = (-4 m/s) / (2 s)

Acceleration = -2 m/s²

The correct answer is Option 2: 2 m/s². The acceleration of the object at 8 seconds is 2 m/s². Note that the negative sign indicates that the acceleration is in the opposite direction of the velocity.

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The displacement vector of the tip of the minute hand from 8:00 to 8:20 a.m. is approximately (-0.866, -1.5) cm.

To find the displacement vector of the tip of the minute hand from 8:00 to 8:20 a.m., we need to consider the path taken by the tip of the minute hand and calculate the change in position from the starting point to the ending point.

First, we need to determine the angular displacement of the minute hand from 8:00 to 8:20 a.m. There are 60 minutes in one full revolution, which means that each minute corresponds to an angular displacement of 6 degrees (360 degrees divided by 60). From 8:00 to 8:20 a.m., there are 20 minutes, so the angular displacement is 6 degrees per minute times 20 minutes, which is 120 degrees.

Next, we need to determine the position of the tip of the minute hand at 8:00 a.m. We are told that the x-axis points in the same direction as the minute hand at 8:15 a.m. and the y-axis points in the same direction as the minute hand at 8:00 a.m. This means that at 8:00 a.m., the minute hand is pointing directly along the positive y-axis, so its position is (0,1) in the xy-plane.

To find the position of the tip of the minute hand at 8:20 a.m., we need to apply a rotation of 120 degrees to the position at 8:00 a.m. A transformation matrix can be used to accomplish this:

cos(120) -sin(120)

sin(120) cos(120)

Multiplying this matrix by the position (0,1) gives:

(0,1) * cos(120) - (1,0) * sin(120) = (-sqrt(3)/2, -1/2)

So the position of the tip of the minute hand at 8:20 a.m. is approximately (-0.866, -0.5).

Finally, we can find the displacement vector by subtracting the starting position from the ending position:

(-0.866, -0.5) - (0,1) = (-0.866, -1.5)

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The 14.317 g sample of sodium sulfate, you have approximately 6.058 × 10^22 molecules of sodium sulfate.

To find the number of molecules of sodium sulfate in a sample, you need to use Avogadro's number and the molar mass of sodium sulfate.
1. Calculate the number of moles of sodium sulfate in the sample by dividing the given mass (14.317 g) by the molar mass of sodium sulfate.

The molar mass of sodium sulfate is 142.04 g/mol.
  Number of moles = mass / molar mass
                 = 14.317 g / 142.04 g/mol
                 = 0.1007 mol (rounded to four decimal places)

2. Use Avogadro's number,

which is 6.022 × 10^23 molecules/mol, to convert the number of moles of sodium sulfate to molecules.
  Number of molecules = number of moles × Avogadro's number
                      = 0.1007 mol × 6.022 × 10^23 molecules/mol
                      ≈ 6.058 × 10^22 molecules

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When an object is positioned close to the focal point of a converging lens, a virtual image is created. Its image is magnified & upright for such a posture.

Despite not being officially acknowledged or confirmed, a virtual tyrant in essence or effect. A: occurring or existing mostly online virtual purchasing. 2: being “ on ” or “ simulated on the a computer or a computer network printed or digital books a virtual keyboard.

When we frequently use the word "virtual," we generally mean online, that is, via a computer or other device. We use it to describe any communication that does not occur in a face-to-face physical setting.

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The phrase "energy that a ball has and produces as it rolls down a hill"  is an example of kinetic energy.

Kinetic energy is a type of energy that a particle or an object possesses as a result of its motion. By exerting a net force on an object, work is done, which transfers energy; as a result, the object accelerates and gains kinetic energy.

A moving object or particle's ability to move depends on both its mass and motion. This is known as kinetic energy. Translation (or movement along a path from one place to another), rotation about an axis, vibration, or any combination of motions are examples of possible types of motion.

A body's squared translational kinetic energy, or 1/2mv², is equal to one-half the product of its mass, m, and its velocity, v.

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Answer:

vf = 32ms

Explanation:

v  =  u  +  a t ,

v  =  0  +  8.0  x  4.0  

v  =  32 ,

v  =  32 m /s  

Hope it Helps! :D  

To stop a 2525 kg truck going 9.72 m/s in t =5.00 s, the force required can be calculated as follows:

The push or pull on an object with mass causes it to change its velocity. Force is an external agent capable of changing a body's state of rest or motion. It has a magnitude and a direction. Here

Acceleration, a = (v - u) / t

Where,

u = Initial velocity = 9.72 m/s

v = Final velocity = 0

t = Time taken to come to rest = 5.00 s

Therefore,

a = (0 - 9.72) / 5.00 = -1.944 m/s²

Negative sign indicates that the truck is decelerating or slowing down.

Using Newton's second law of motion, we can calculate the force required to stop the truck:

F = ma

Where, F = Force applied

m = Mass of the truck

a = Acceleration of the truck

F = 2525 kg × (-1.944 m/s²) = -4905.9 N

The force required to stop the truck is (-4905.9 N). The negative sign indicates that the force is acting opposite to the motion of the truck.

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