Why does polarization not technically charge objects? (or, what is the difference between polarization and charging?)

The image is approximately 9.33 cm away from the mirror, on the object's side.

To determine the image location formed by a converging mirror, we can use the mirror equation:

1/f = 1/d_o + 1/d_i

where:

f is the focal length of the mirror,

d_o is the object distance (distance of the object from the mirror), and

d_i is the image distance (distance of the image from the mirror).

In this case, the focal length (f) is given as 7 cm, and the object distance (d_o) is 4 cm.

Plugging in the values into the mirror equation:

1/7 = 1/4 + 1/d_i

To find the image distance (d_i), we can solve for it:

1/d_i = 1/7 - 1/4

1/d_i = (4 - 7) / (4 * 7)

1/d_i = -3 / 28

Taking the reciprocal of both sides:

d_i = 28 / -3

d_i ≈ -9.33 cm

The negative sign indicates that the image formed by the converging mirror is virtual and located on the same side as the object.

Therefore, the image is approximately 9.33 cm away from the mirror, on the object's side.

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The extra cost of fuel for driving 83 mph instead of 73 mph is $3.7671.

The speed of your automobile has a huge effect on fuel consumption. Traveling at 65 miles per hour (mph) instead of 55mph can consume almost 20% more fuel. As a general rule, for every mile per hour over 55 , you lose 2% in fuel economy.

If you take a 400-mile trip and your average speed is 83mph rather than the posted speed limit of 73mph, then the extra cost of the fuel is calculated as:

* **Fuel consumption at 83 mph:** 30 mpg * (1 - 2% * (83 - 55)) = 27.6 mpg

* **Fuel consumption at 73 mph:** 30 mpg * (1 - 2% * (73 - 55)) = 29 mpg

* **Extra fuel used:** 400 miles / 27.6 mpg - 400 miles / 29 mpg = 2.4 gallons

* **Extra cost of fuel:** $3.26/gallon * 2.4 gallons = $3.7671

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1. If an object is 80 km long in real life, it would have to appear 4cm in the model.

2.  If an object is 5 cm long in the model, it would have to appear 250  km in real life.

3a. The scale of the model is 48000 km/cm

b. The diameter of the ball representing the new planet would be 1.3125 cm

c. In this model, a 10cm diameter ball would represent a planet with 480,000 km diameter.

A scientific model is a depiction of a set of concepts, events, or processes that is physical, mathematical, conceptual, or both.

Based on the scale of the given models:

1. An object that is 80 km long in real life, would have to appear:

Size of model = 80 km * 20 km/cm

Size of model = 4 cm

2. If an object is 5 cm long in the model:

Its size in real life = 5cm * 50 km/cm

Its size in real life = 250 km

3a. The scale of the model = 84000 km/ 2 cm

The scale of the model = 48000 km/cm

b. The diameter of the ball representing the new planet = 63000 km / 48000 km/cm

The diameter of the ball representing the new planet = 1.3125 cm

c. A 10cm diameter ball would represent a planet with a diameter = 48000 km/cm * 10 cm

Diameter of the planet =  480,000 km

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Given:

• Acceleration of rocket = 28.0 m/s²

• Mass of astronaut = 95 kg

Let's find the apparent weight of the astranaut.

In a direct rocket motion, as we are coming towards the Earth the weight reduces while as the rocket is going up, you feel more weighted.

Now, to find the apparent weight of the astranaut, apply the formula:

Where:

Aw is the apparent weight

m is the mass = 95 kg

g is acceleration due to gravity = 9.8 m/s²

a is the acceleration of the rocket = 28.0 m/s²

Thus, we have:

Therefore, the apparent weight of the astranaut is 3.591 kN

ANSWER:

3.591 kN

If a geothermal power plant produces 6000 watts of power for every 13000 watts of heat from water, so its efficiency is 46%.

Efficiency is defined as the proportion of energy which is wasted during a process. The rate at which energy is wasted needs to be reduced and there are a many ways to save energy, such as thermal energy. The formula of efficiency is equals to useful power out divided by total power in. Mathematically it is written as

Efficiency = useful power out ÷ total power in

Some amount of energy is always wasted from every machine, the efficiency should always be less than 1 or less than 100%. No machine is 100 percent efficient.

So we can conclude that if a geothermal power plant produces 6000 watts of power for every 13000 watts of heat from water, so its efficiency is 46%.

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The statement, "The Voyager 1 space probe can't change its own motion" is correct and true. The Voyager 1 space probe was launched by NASA in 1977, and since then it has traveled over 14 billion miles away from Earth. It's the most distant spacecraft from Earth.

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Answer:

gas

Explanation:

in gaseous state molecules move the most because force of attraction between atoms are least in gaseous state

Answer:

its B ; mass is the amount of matter in an object, and weight is the downward pull on an object due to gravity.

Explanation:

I just took the test on edge 2020

A spectrometer (c) is used by astronomers to separate light into its individual colours.

A spectrometer is a tool used in science to examine the characteristics of light. It functions by dividing light into its many wavelengths or colours, enabling astronomers to examine the spectra of celestial objects' emissions and absorptions. Spectrometers can be made to work in the visible, ultraviolet, and infrared wavelength ranges, among others. A slit to let light through, a dispersion component such a prism or diffraction grating, and a detector to assess the intensity of the various wavelengths are the standard components of such devices.

Astronomers can create a spectrum—a graph depicting the intensity of light at each wavelength—by passing light through a spectrometer. This spectrum offers important details regarding the makeup, temperature, and motion of celestial objects. Astronomers can identify elements that are present, ascertain their abundances, and investigate a variety of physical processes taking place in celestial objects by carefully examining the distinct patterns and features in the spectrum.

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Light is a form of electromagnetic radiation with a wavelength which can be detected by the human eye. It is a small part of the electromagnetic spectrum and radiation given off by stars like the sun. Animals can also see light. The study of light, known as optics, is an important research area in modern physics.

Answer:

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Answer:

the initial force exerted on the rocket is 900 N

Explanation:

The computation of the initial force exterted on the rocket is shown below:

Force exerter = Rate of change of momentum

= 300 m/s × 3kg/s

= 900 N

hence, the initial force exerted on the rocket is 900 N

we simply multiplied the rate with its speed so that the force could come

Answer:

7.35..kg

Explanation:

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The correct answer is that a falling object that has reached its terminal speed does not continue to gain acceleration or speed. Therefore option D, neither is correct.

When an object falls and reaches its terminal speed, it means that the object is experiencing a balanced state between the force of gravity pulling it down and the force of air resistance pushing against it.

At terminal speed, these two forces are equal in magnitude but opposite in direction, resulting in a net force of zero.

Since there is no net force acting on the object at terminal speed, the object does not experience any further acceleration. Acceleration is defined as a change in velocity, which requires a nonzero net force.

At terminal speed, the object's velocity remains constant and does not change.

Although the object does not gain any additional acceleration, it also does not gain any additional speed. The terminal speed is the maximum speed that the object can reach while falling through the air. Once the object reaches this speed, it remains constant and does not continue to increase.

Therefore, the correct answer is that a falling object that has reached its terminal speed does not continue to gain acceleration or speed.

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The statement "They have a positive charge and are present in the nucleus of an atom along with the neutrons" correctly describes protons.

Protons are small particles that make up the nucleus of an atom. They carry a positive charge and have a mass of approximately 1 atomic mass unit. The number of protons within an atom's nucleus defines its atomic number and thus its identity as an element.

For instance, carbon atoms have 6 protons, and oxygen atoms have 8 protons. Protons are vital building blocks of all atoms and play a significant role in the chemical behavior and reactions of elements.

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F = ma is the formula of Newton's Second Law of Motion. Newton's Second Law of Motion is described as Force is equal to the rate of change of momentum. For a constant mass, force equals mass duration acceleration.

Newton's Second Law of Motion F=ma is very significant because it indicates the relationship between forces and motion. It permits you to calculate the acceleration (and therefore velocity and position) of an object with known forces. This is extremely helpful for scientists, engineers, inventors, etc.

Therefore : F is directly proportional to m×a. This relation F is directly proportional to m×a can be turned into an equation by placing in a constant k.

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Answer: overjustification

Explanation:

The overjustification effect is a situation that occurs when an incentive like prizes or money or prizes leads to the reduction in an individual's intrinsic motivation that is necessary in performing a task.

In this case, because the children are motivated by money, when the take doesn't involve money anymore, they may not be willing to do it.

When a boy lifts a 17.8kg microwave oven 3.8 meters distance off the ground then work did the boy do on the microwave is 662.8 J.

Work done is the amount energy gained (loosed) in bringing the body from initial position to final position. It is denoted by W and its SI unit is joule(J). i.e. Work(W) is force(F) times displacement(s). W=F× s When a body is displaced with 1 newton of force by 1 m, then we can say that work has been done on the body by 1 joule. Writing for it's dimension,

W=F× s

Force has dimension [L¹ M¹ T²]

distance has dimension [L¹]

multiplying both the dimensions Force and Displacement we get, dimension of Work [L² M¹ T²].

given,

m = 17.8 kg

d = 3.8

W = Fd = mg.d = 17.8×9.8×3.8

W = 662.8 J

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In the given options, the situations that will cause a current to be induced in a conductive loop in a uniform magnetic field B are:

b. The conductive loop is oriented so that it is perpendicular to B. The area of the loop is decreased.

d. The conductive loop is oriented so that it is perpendicular to B. The loop is moved parallel to the field lines of B.

e. The conductive loop is oriented so that it is perpendicular to B. The loop is moved perpendicular to the field lines of B.

Explanation:

According to Faraday's law of electromagnetic induction, a changing magnetic field through a conductor induces an electromotive force (EMF) that causes a current to flow in the conductor.

In situation b, when the area of the loop is decreased while maintaining its perpendicular orientation to the magnetic field B, the magnetic flux passing through the loop decreases. This change in magnetic flux induces an EMF and subsequently a current in the loop.

In situation d, when the conductive loop is moved parallel to the field lines of B, the magnetic flux passing through the loop changes. This change in magnetic flux induces an EMF and subsequently a current in the loop.

In situation e, when the conductive loop is moved perpendicular to the field lines of B, the magnetic flux passing through the loop changes. This change in magnetic flux induces an EMF and subsequently a current in the loop.

It's important to note that in situations a and c, although the loop lies in the plane of B and the magnitude of B may change, there is no change in the magnetic flux passing through the loop. Therefore, no current will be induced in the loop in these situations.

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Answer:

i think its b

Explanation:

Answer:

Magnetism surrounding the wire draws the needle toward the wire.

Explanation:

The wire itself has it's own magnetism also, that's why, if you put a compass near it, then the compass will get confused and point the wrong direction.

Thanks!

MiniMeteorologist

The total amount of kinetic energy associated with the motion of atoms or molecules in an object is referred to as Heat.

Kinetic energy is the energy of motion. It is the energy possessed by a body due to its motion. The kinetic energy of an object is equal to one half of the product of its mass and the square of its velocity. In equation form, kinetic energy can be expressed as KE = 1/2 mv2, where m is the mass of the object and v is its velocity. Kinetic energy can be used to do work. For example, when a car accelerates, its kinetic energy is used to overcome the force of gravity and friction, allowing it to move forward. Kinetic energy can also be used in other situations such as the kinetic energy of a thrown baseball or the kinetic energy of a swinging pendulum. Kinetic energy is a form of energy that can be converted into other forms of energy, such as heat and sound, or used to do work.

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Answer:

30 meters

Explanation:

because that's is where the points meet

Answer:

when the time is three seconds it will be 30 m

Explanation:

Answer:

through a chain reaction of particle collisions in a medium.

Explanation:

Answer: Heyaa! ~

State of the problem is that your friend routinely misses the school bus.

Explanation:

What are the causes for his missing the school bus:

Hopefully this helps you!

-Matthew ^^

Answer: parasitic organisms cause harm to other organisms.

Answer:

parasitic organisms cause harm to other organisms.

Explanation:

Answer:

v = 44.27 m / s

Explanation:

This is an exercise in kinematics since they ask the maximum speed of the train

           v² = v₀² + 2 a x

a train departs with zero initial velocity

           v² = 2 a x

           v = √ 2ax

calculate

           v = √ (2 1.21 810)

            v = 44.27 m / s

in this solution we have assumed that the train uses the entire distance with acceleration

Answer:

98.1 Joule

Explanation:

Solution,

⇒Mass(m)=10kg

⇒Weight(F)=Mg=10×9.81=98.1N

⇒Distance(d)=1m

Now,

Work done=F×d

                  =98.1×1

                  =98.1J

The work done on the box when lifting it from the ground is 98.1 Joules (J).

To calculate the work done on the box when you lift it from the ground, you can use the formula:

Work (W) = Force (F) × Distance (d) × cos(θ)

In this case, the force (F) is the weight of the box, which is equal to its mass (m) multiplied by the acceleration due to gravity (g):

F = m × g

F = 10 kg × 9.81 m/s²

F = 98.1 N

The distance (d) is the height you lift the box, which is 1 meter.

The angle (θ) between the force and the direction of motion is 0 degrees, as you are lifting the box straight up vertically.

Now, plug the values into the work formula:

W = 98.1 N × 1 m × cos(0°)

Since the angle cos(0°) is equal to 1, the work done on the box is:

W = 98.1 N × 1 m × 1

W = 98.1 Joules (J)

So, you do 98.1 Joules of work on the box when you lift it from the ground.

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