what is liang most likely trying to do

The vector with a magnitude of 5 and in the direction of the vector 4i - 3j + k is approximately (20/√26)i + (-15/√26)j + (5/√26)k.

The given vector can be normalized before being multiplied by the desired magnitude. This is how to locate the vector:

The vector that has been provided should be normalized by dividing each of its components by its magnitude. The Pythagorean theorem can be used to determine the magnitude of the vector 4i - 3j + k:

Magnitude = √(4² + (-3)² + 1²) = √(16 + 9 + 1) = √26

Normalize the vector by dividing each component by the magnitude:

Normalized vector = (4/√26)i + (-3/√26)j + (1/√26)k

Multiply the normalized vector by the desired magnitude:

To obtain a vector with a magnitude of 5, multiply each component of the normalized vector by 5:

Desired vector = 5 * ((4/√26)i + (-3/√26)j + (1/√26)k)

Simplifying the expression gives:

Desired vector ≈ (20/√26)i + (-15/√26)j + (5/√26)k

So, the vector with a magnitude of 5 and in the direction of the vector 4i - 3j + k is approximately (20/√26)i + (-15/√26)j + (5/√26)k.

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Lorenz curve is the curve that plots graphically the distribution of income. Therefore, the correct statement is statement 3.

The Lorenz curve depicts the distribution of income (or wealth) within an economy. Max O. Lorenz created it in 1905 to symbolize the distribution of income. The Lorenz curve displays the total percentage of income earned by various demographic groups.

The graph shows cumulative income or wealth on the vertical axis and percentiles of the population according to income or wealth on the horizontal axis. Lorenz curves and the statistics derived from them are frequently utilized to assess inequality within a population.

An empirical measurement of the wealth or income distribution within a population, based on information from tax returns, which detail income for a significant section of the people, is the common starting point for a Lorenz curve.

Therefore, statement 3 is correct.

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The system acceleration for the pulley having masses m1 = 0.7 kg and m2 = 0.4 kg  Is 35.93 \(m/s^2\).

Newton's second law provides a detailed explanation of how a force can alter a body's motion. It is believed that a body's momentum varies over time at a rate equal to the force acting on it in both direction and amplitude. The combined effects of a body's mass and velocity determine its momentum.

Given:

The mass, m₁ = 0.7 kg,

m₂ = 0.4 kg,

Calculate the system acceleration by the following formula,

a = g(m1 − m2)/(m1 + m2)

Here a is the acceleration.

Substitute the values,

a = 9.8 * (0.7 - 0.4 ) / (0.7 + 0.4)

a = 35.93 \(m/s^2\)

Therefore, the system acceleration for the pulley is 35.93 \(m/s^2\).

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Explanation:

a boy walks at 2m/s for 30sec and run at 5m/s for 20sec. what is his average speed

The loss in the gravitataional potential energy is obtained as  7.056 * 10^9 J and this energy is converted to  the kinetic energy of the moving aircraft.

The term gravitational potential energy has to do with the energy that is possessed by a body by virtue of its position. Thus it has to do with the height of the object. The greater the height, the more the gravitational potential energy.

Now;

E = mgh

m = mass of the object

g = acceleration due to gravity

h = height of the object

Thus;

The loss in the gravitational potential energy is obtained from;

80,000 * 9.8 (10,000 - 1000)

= 7.056 * 10^9 J

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Answer:

Explanation:

weight of the car mg = m g

frictional force acting on the car = μ mg where μ is coefficient of friction

= m μ g

This force provides centripetal force , hence

m μ g  = m v² / R

μ = v² / rg

= 22 x 22 / 65 x 9.8

= .759  

Answer:

motion of an object—even if the object is maintaining a constant speed—still count as acceleration

Explanation:

By Newton's second law, the car has mass m so that the net force is

∑ F = ma

Find the acceleration a of the car. Since the force is constant, acceleration is also constant. If the car accelerates from rest to 3 m/s in 1.2 s, then its acceleration is

a = (3 m/s - 0) / (1.2 s) = 2.5 m/s²

Then the mass of the car m is such that

7.8 N = m (2.5 m/s²)

Solve for m :

m = (7.8 N) / (2.5 m/s²) = 3.12 kg

Answer:

The mass of the water is greater than the combined mass of the two gases

The area of Mrs. Turner's apartment is approximately 0.05304 square feet.

To find the area of Mrs. Turner's apartment, we need to convert the measurements from the scale drawing to the actual measurements in feet, using the given scale factor of 1 inch/18 feet.

Length of apartment in feet = 6.25 inches × (1 foot/18 inches) = 0.34722 feet

Width of apartment in feet = 2.75 inches × (1 foot/18 inches) = 0.15278 feet

Now, we can calculate the area of the apartment in square feet by multiplying the length and width:

Area of apartment in square feet = Length × Width = 0.34722 feet × 0.15278 feet = 0.05304 square feet

Therefore, the area of Mrs. Turner's apartment is approximately 0.05304 square feet.

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Answer:

14.1seconds approx

Explanation:

Given data

Distance= 59.1m

Your velocity= 2.35m/s

Walkway velocity= 1.85m/s

Total velocity= 2.35+1.85= 4.2m/s

We know that

Velocity= distance/time

time= distance/velocity

substitute

time= 59.1/4.2

time= 14.07

time=14.1seconds approx

Hence the time is 14.1seconds approx

Answer:

You will discover that at high altitude, there is cold and the opposite is experienced when you go deep down the sea. However, the reason elevation affects climate and temperature gets colder is this. As you go higher up, the atmosphere experiences less pressure.

Explanation:

Answer:

The focal length of the mirror is 10.4 cm.

Explanation:

So substitute the values of object distance and image distance in the mirror equation,

1/f = 1/(-18cm) + 1/(-25.0cm)

1/f = -25cm/(-18cm x -25cm) - 18cm/(-18cm x 25cm)

1/f = ( -25cm - 18cm)/(18cm x 25cm)

1/f = -43.0/450.0

f = -10.4651 cm.

The focal length of the mirror is approximately -10.4 cm.

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Answer:

D - Water

Explanation:

Yes ,In my  DC experiment, when the capacitor was just began to charge the current in the circuit was O maximum between maximum and minimum.

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The equation for the magnitude of the system's acceleration is a = g + (2M/m), where g is the acceleration due to gravity and M and m are the masses of the two objects.

Acceleration is the rate of change of velocity in an object over time. It is the rate of change of the speed of an object, and is defined as the change in velocity divided by the change in time. In other words, it is the rate at which an object's speed changes. Acceleration can be caused by a change in the speed of an object, or by a change in its direction. It is usually measured in meters per second squared (m/s2). Acceleration can be either positive or negative, depending on the direction of the change in velocity.

a = g + (2M/m)

a = 9.81 m/s^2 + (2(8 kg)/(3 kg)) = 13.87 m/s^2

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Answer:

A

Explanation:

d = 1/2 at^2      a = 10

  = 1/2 (10)(1^2) = 5 m

Answer:

7.7°K

Explanation:

Using pV = NkT = nRT

U = CvNkT = Cv nRT

where:

Cv is a constant dependent on temperature (e.g. equal to 3/2 for a monatomic gas for moderate temperatures)

U is the internal energy

p is the pressure

V is the volume

n is the amount of gas (moles)

R is the gas constant, 8.314 J·K^−1mol^-1

T is the absolute temperature

N is the number of particles

k is the Boltzmann constant, 1.381×10^−23 J·K^−1

In your first problem, the energy difference between heat absorbed by the gas and the work performed is the energy lost to heat. So

∆E = Cv nR∆T

where ∆T is the temperature change

∆T = ∆E / (Cv nR)

= (750-625) / (3/2)(1.3)(8.314)

= 7.71° K

The coefficient of thermal conductivity (k) is related to the rate of heat flow (Q), the cross-sectional area (A), the length (L), the temperature difference (ΔT), and the thermal resistance (Rth) by the following equation:

k = Q / (A * ΔT * L) = Rth * (A * ΔT)

Reorganizing this equation gives:

Rth = k / (A * ΔT)

The given information in the problem is:

Rate of heat flow (Q) = 14.0 watts

Thermal resistance (Rth) = (350 mm × 350 mm × 15 mm) / (14.0 watts) = 31.5 mm⁴/C

Temperature difference (ΔT) = 28°C

Substituting these values into the equation, we have:

k = Q / (A * ΔT) = 14.0 W / (0.35 m² * 28°C) = 1.94 W/mK

So the coefficient of thermal conductivity (k) for this wood is approximately 1.94 W/mK.

Answer:

\(x = t\)

\(y = \frac{1}{3}t\)

\(z =t\)

Explanation:

Given

\(r(t) = f(t)i + g(t)j + h(t)k\) at \(t = 0\)

Point: \((f(t0), g(t0), h(t0))\)

\(r(t) = ln\ t_i + \frac{t-1}{t+2}j + t\ ln\ tk\), \(t0 = 1\) -- Missing Information

Required

Determine the parametric equations

\(r(t) = ln\ ti + \frac{t-1}{t+2}j + t\ ln\ tk\)

Differentiate with respect to t

\(r'(t) = \frac{1}{t}i +\frac{3}{(t+2)^2}j + (ln\ t + 1)k\)

Let t = 1 (i.e \(t0 = 1\))

\(r'(1) = \frac{1}{1}i +\frac{3}{(1+2)^2}j + (ln\ 1 + 1)k\)

\(r'(1) = i +\frac{3}{3^2}j + (0 + 1)k\)

\(r'(1) = i +\frac{3}{9}j + (1)k\)

\(r'(1) = i +\frac{1}{3}j + (1)k\)

\(r'(1) = i +\frac{1}{3}j + k\)

To solve for x, y and z, we make use of:

\(r(t) = f(t)i + g(t)j + h(t)k\)

This implies that:

\(r'(1)t = xi + yj + zk\)

So, we have:

\(xi + yj + zk = (i +\frac{1}{3}j + k)t\)

\(xi + yj + zk = it +\frac{1}{3}jt + kt\)

By comparison:

\(xi = it\)

Divide by i

\(x = t\)

\(yj = \frac{1}{3}jt\)

Divide by j

\(y = \frac{1}{3}t\)

\(zk = kt\)

Divide by k

\(z = t\)

Hence, the parametric equations are:

\(x = t\)

\(y = \frac{1}{3}t\)

\(z =t\)

The mass of the planet is  5.98 × 10^24 kg.

To calculate the mass of the planet, we can use Kepler's Third Law of Planetary Motion. This law states that the square of the period of revolution of a planet around the sun is directly proportional to the cube of the semi-major axis of its orbit.

First, we need to convert the period of the satellite's orbit to seconds. We know that there are 60 minutes in an hour, so the period can be expressed as (6 × 60 + 12) minutes, which equals 372 minutes. Multiplying this by 60 seconds, we get a period of 22,320 seconds.

Next, we need to find the semi-major axis of the orbit. In a circular orbit, the semi-major axis is equal to the radius of the orbit. Therefore, the semi-major axis is 8.8 × 10^6 m.

Now, we can apply Kepler's Third Law to calculate the mass of the planet. The formula is T^2 = (4π^2/GM) × a^3, where T is the period of revolution, G is the gravitational constant, M is the mass of the planet, and a is the semi-major axis of the orbit.

Rearranging the formula, we can solve for the mass of the planet:
M = (4π^2/G) × a^3 / T^2

Plugging in the values, we get:
M = (4 × π^2 / 6.67430 × 10^-11) × (8.8 × 10^6)^3 / (22,320)^2

Evaluating this expression, we find that the mass of the planet is approximately 5.98 × 10^24 kg.

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Answer:

2

Explanation:

there are 2 significant figures in there

The dog has a momentum of 11.34 kg*m/s.

The correct answer is D.

Product of a particle's mass and velocity. A vector quantity, momentum has both a magnitude and a direction. The force exerted on a particle is equated to the time rate of change of momentum by Isaac Newton's second equation of motion.

The sum of the units of mass and velocity yields the unit of momentum. The momentum is expressed in kilogram meters per second (kgm/s) in SI units if the mass and velocity are both expressed in kilograms and meters per second, respectively.

P = momentum

m = mass

v = velocity

m = 18 kg

v = .63 m/s

P = m × v

P= 18 × .63

p = 11.34 kg*m/s.

The dog has a momentum of 11.34 kg*m/s.

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The complete question is -

A dog weighing 18 kg runs into a park at a velocity of .63 m/s. What is the momentum of the dog? (1 point)

A-035 kg*m/s

B-17.37 kg*m/s

C- 28.5 kg*m/s

D- 11.34 kg* m/s

Answer:

The dog has a momentum of 11.34 kg*m/s.

A set of coordinates on a map grid are called coordinate grid or grid squares.

The quadrants in which ordered pairings, or coordinates, are established typically have two or more intersecting lines. Coordinates are also used in maps.

Eastings and Northings, two types of grid lines, are what make up the grid squares you see on maps. Both Easting and Northing grid lines are numbered from west to east and from south to north, respectively. The vertical lines that separate the map's west and east halves are known as eastings.

GPS coordinates, which are frequently stated in alphanumeric characters, can be used to uniquely identify a specific geographic place on the planet. In this context, coordinates refer to the points where a grid system intersects. Typically, GPS coordinates are written as a combination of latitude and longitude.

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Answer:

What Um Sorry Where's The Answer?....

The correct answer is option D, which specifies that while putting out a fire in stacked and piled materials, use hooks or pike poles to pull the materials apart prior to dousing the area.

Putting out the fire with Class A foam or water until it has fully died down. In physics, a force is a factor that has the potential to change an object's trajectory. In reaction to a force, a mass-containing object can accelerate or modify its velocity by, for instance, moving away from rest. Force can logically be described as pushing or pulling. A force has both magnitude and direction, making it a vector quantity. Using the SI system, it is written as a newton (N). There is material in all things.

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Correct answer:- (d)  use hooks or pike poles to break apart material.

When attacking the fire in stacked and piled materials, use hooks or pike poles to break apart material, then apply water or Class A foam until extinguished.

A mixture of artificial stabilizers, foaming agents, fluorochemicals, and synthetic polymers are used to create alcohol-resistant (AR) foam, which is intended for use with polar solvents. These foams are resistant to being destroyed by polar solvents due to their chemical composition.

The very effective foam known as aqueous film-forming foam (AFFF, or alcohol-resistant AR-AFFF) is used to put out high-hazard liquid fires.

Class A: Consists of common combustibles like rubber, paper, wood, and plastic. Pressurized water, foam, or multipurpose dry chemicals are the most often used extinguishing agents.

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Answer: It is clear that the fuels currently used will not be sustainable for the exponential growth of our energy demand. Although it is difficult to accurately predict the fuels that we will use, however it is clear that the powerful combustion of hydrogen is expected to be used especially to propel the aerospace and aeronautical industry. We can also highlight the use of nuclear fusion energy that until now is taking its first steps and finally it is quite likely that solar energy will continue to be used but in a much more powerfull and efficient way.

The car is moving at approximately 12.5 meters per second.

The kinetic energy (KE) of an object can be calculated using the formula:

KE = 1/2 * m * \(v^2\)

where

KE = kinetic energy,

m =Mass of the object, and

v = velocity.

In this case, we are given the mass (m) of the car as 1600 kg and the kinetic energy (KE) as 125,000 J. To find the velocity .

Substituting the  values , we have:

125,000 J = 1/2 * 1600 kg *\(v^2\)

Now, we can solve for v by rearranging the equation:

\(v^2\) = (2 * 125,000 J) / 1600 kg

\(v^2\) = 156.25 \(m^2/s^2\)

Taking the square root, we find:

v = √156.25\(m^2/s^2\)

v ≈ 12.5 m/s

Therefore, the car is moving at approximately 12.5 meters per second.

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