Which of the following represents an image that is located behind a mirror?
A. +di
B. -do
C. +do
D. -di

Estimated total energy output IN ONE SECOND = 5 x 10²⁶ Joules .

Energy = mass · c²  ( Albrecht Einshtein)

c = 3 x 10⁸ m/s

c² = 9 x 10¹⁶ m²/s²

5 x 10²⁶ Joules = mass · (9 x 10¹⁶ m²/s²)

mass = (5 x 10²⁶ Joules) / (9 x 10¹⁶ m²/s²)

mass =  (5 x 10²⁶) / (9 x 10¹⁶)   kg

mass =  (0.55... x 10¹⁰) kg

mass = 5.55... x 10⁹ kilograms

Look at that for a second.  Then think about it for another second.

It's telling us that at its present rate of energy output, the sun is losing more than 5 and a half Billion kilograms of mass every second.  And when we read other things about the sun, they say that the sun is expected to continue doing what it's doing for another 4 or 5 Billion years !

Gives ya some idea of the size and mass of the Sun, doesn't it !

The mass of the Sun is approximately 1.989 × 10³⁰ kg, and the Sun is able

to convert mass to energy to energize the Earth for billions of years.

Reasons:

The energy, E, from the Sun comes from nuclear fusion hydrogen atom

protons to form a helium atom with a reduction in mass.

According to Albert Einstein's mass energy equivalence, E = m·c²

[tex]The \ mass \ converted \ to \ energy, \ m = \dfrac{E}{c^2}[/tex]

Where;

c = The speed of light =  299,792,458 m/s

Total energy output of the Sun, E = 5 × 10²⁶ j/s

The loss in mass = The mass converted into energy

[tex]The \ loss \ in \ mass = \dfrac{5 \times 10^{26} \ J/s}{\left(299,792,458 \ m/s\right)^2} \approx 5.563 \times 10^9 \, kg[/tex]

The loss in mass per second ≈ 5.563 × 10⁹ kg.

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Answer:

D) Q/2

Explanation:

The amount of charge on a capacitor is given by:

Q = CV

where

C is the capacitance

V is the voltage

The capacitance of a parallel-plate capacitor is given by

[tex]C=\epsilon_0 \frac{A}{d}[/tex]

where

[tex]\epsilon_0[/tex] is the vacuum permittivity

A is the area of the plates

d is the separation between the plates

Substituting the last formula into the first one, we can write

[tex]Q=\epsilon_0 \frac{AV}{d}[/tex]

In this problem, the two plates are pulled apart to twice their original separation, so

d' = 2d

While the voltage V is kept constant. Therefore, the new charge stored in the capacitor will be

[tex]Q'=\epsilon_0 \frac{AV}{2d}=\frac{1}{2} \epsilon_0 \frac{AV}{d}=\frac{Q}{2}[/tex]

Option D is right.The amount of charge on the plates is now equal to Q/2.Charges are stores in the plate placed parallel referred as the parallel plate capacitor.

It is an type capacitor is an in which two  metal plates arranged in such away so that they are connected in parallel and having some distance between them.

A dielectric medium is must in between these plates help to stop the flow of electric current through it due to its non-conductive nature .

The value of charge force the capacitor is given as:

Q = CV

[tex]\epsilon_0[/tex] is the vacuum permittivity

A is the area of the plates

d is the separation between the plates

The value of capacitance of a parallel-plate capacitor is given by the formula;

[tex]\rm C= \epsilon_0\frac{AV}{d}[/tex]

If all the values are constant then the charge is inversely proportional the distance between the charge.

Hence if the distance is doubled in that condition the value of charge will also half.

d' = 2d

While the voltage V is kept constant. Therefore, the new charge stored in the capacitor will be

[tex]\rm Q'= \frac{Q}{2}[/tex]

Hence option D is right.The amount of charge on the plates is now equal to Q/2.

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Answer:

Non-zero

Explanation:

For a simple harmonic motion, the restoring force is given by

F = -kx (1)

where

k is the spring constant

x is the displacement of the system with respect to the equilibrium position

According to Newton's second law, the acceleration of the system is given by

a = F/m (2)

where

m is the mass of the system

So if we substitute (1) into (2) we find

a = -kx/m

so the acceleration is directly proportional to the displacement. Since the value of the displacement  in a simple harmonic motion constantly changes, the acceleration changes as well, so it is non-zero (apart from the instant where the displacement is zero, x = 0, when the acceleration is also zero)

Voltaic cells use chemical reactions to generate electrical energy, as well as the reverse process.

This type of cell is mainly composed of the anode (a metal electrode where oxidation occurs) and the cathode (a metal electrode where the reduction occurs). These electrodes are placed in two compartments separated by a porous plate or membrane and immersed in a medium containing ions.

This is how, when the chemical reaction of oxide-reduction occurs, electricity is generated.

Answer:

When the x-ray tube is above the patient

Explanation:

Maximum scatter radiation to the operator occurs when the x-ray tube is above the patient.

Hope this helps!

Feel free to ask if you have anymore questions!

Answer:

Meter (m)

Explanation:

The wavelenght of a light wave is a measure of the distance between two successive crests (or two successive troughs) of a light wave.

Since the SI units for the distance is the meter (m), then the SI unit for the wavelength is also the meter (m).

Wavelength is related to the frequency of the light wave by:

[tex]\lambda=\frac{c}{f}[/tex]

where

c is the speed of light

f is the frequency of the light

Answer:

The answer is 2) heat of combustion

Explanation:

Answer:

A

Explanation:

A virtual image is on the same side as the object, which by convention is drawn on the left side.  So -di would represent a virtual image.

A virtual image is formed when light rays from an object appear to diverge behind a lens or mirror, and this image cannot be projected onto a screen. It exists on the same side of the lens or mirror as the object, and it is visible only through the optical device creating it.

A virtual image is an image formation where the light rays from an object appear to diverge behind a lens or mirror, but do not physically come together at a point. Due to this, a virtual image is located on the same side of the lens or mirror as the object itself and cannot be projected onto a screen. It's called "virtual" because the light rays seem to emanate from a point behind the mirror or lens, but they don't actually meet there.

For example, when you look in a flat mirror and see your reflection, you're observing a virtual image. Unlike real images, which can be displayed on a screen, virtual images are only visible when looking into the optical device that's creating them.

Additionally, distorted perceptions such as magnification or reduction can occur with virtual images, although these characteristics do not define a virtual image on their own. A camera can capture a virtual image by focusing the light from the image, much like it would focus light from a real object or scene in front of the lens.

In series circuits, components are connected in a single path, sharing the same current but dividing the total voltage. In parallel circuits, components are connected across common points, sharing the same voltage but dividing the current.

Series Circuits:

A series circuit consists of a single path for current to flow. This means that all components are connected one after another, like a chain.

In a series circuit, the current (I) is the same through all components because there is no alternative path for it to take. If you were to measure the current at any point in the circuit, you would get the same reading.

The total voltage (V) supplied by the source is divided among the components. The sum of the voltage across each component equals the total voltage supplied by the source. This can be expressed as:

[tex]V_{total[/tex] ​= V₁​ + V₂ ​+ V₃ ​+...

Parallel Circuits:

Parallel circuits have multiple paths for current to flow. Each component is connected across the same two points (called nodes), meaning that all components share the same voltage.

In a parallel circuit, the voltage (V) across each component is the same and equals the voltage of the source. Thus, each component can operate independently at the same voltage level. This can be expressed as:

V₁​ = V₂ ​= V₃​ = [tex]V_{total[/tex]

The total current supplied by the source is the sum of the currents flowing through each branch of the circuit. This can be expressed as:

[tex]I_{total[/tex] = I₁ + I₂​ + I₃ ​+...

Answer:

[tex]0.27 m/s^2[/tex]

Explanation:

The power supplied by the engine is given by

P = Fv

where

F is the force applied

v is the velocity of the car

Here we have

P = 3700 W

v = 14.2 m/s

So we can solve the equation to find the average force:

[tex]F=\frac{P}{v}=\frac{3700 W}{14.2 m/s}=260.6 N[/tex]

The net force applied on the car is also equal to

F = ma

where

m = 960.0 kg is the mass of the car

a is the acceleration

Re-arranging the equation, we find the acceleration:

[tex]a=\frac{F}{m}=\frac{260.6 N}{960.0 kg}=0.27 m/s^2[/tex]

Answer:

Correct

Incorrect

Explanation

At higher altitudes, water boils at a temperature lower than 100°C.The atmospheric pressure at higher heights is lower, so the amount of heat required to create the vapor pressure is lower.Water expands as it freezes.This is only possible when it attains 4°C.However, before this temperature, water contracts will decrease in temperature as any other fluid material will behave.Water reaches its maximum density at 4°C.Beyond this temperature, its density reduces as it nears the freezing point.The boiling point of pure water under normal atmospheric pressure is 100°C.Addition of other solute substance will affect this boiling point in that it will increase with some degrees.For example, salt water has a boiling point a bit higher than that of pure water.In a pressure cooker, the water is sealed inside the machine, hence all the heat generated by the process helps in increasing the temperatures inside the cooker.The water thus is super-heated and the boiling point is more than 100°C.

Answer:

Explanation:

[tex]m_l[/tex]     is the magnetic quantum number.

The only possible value for the magnetic quantum number for an electron in an s orbital is 0.

The first three quantun numbers are:

       This quantum number is related to the type (or shape) of the orbital:

        For s orbitals [tex]l=0[/tex]

        For p orbitals [tex]l=1[/tex]

        For d orbitals [tex]l=2[/tex]

         For f orbitals [tex]l=3[/tex]

In this case, it is an s orbital, so we have [tex]l=0[/tex].

       Since, for the s orbitals  [tex]l=0[/tex] , the only possible value for [tex]{m_l}[/tex] is zero.

The only possible value of the magnetic quantum number (ml) for an electron in an s orbital is 0. This is because s orbitals only have one orientation, therefore the ml value can't be anything other than 0.

The magnetic quantum number (ml) for an electron in an s orbital is always 0. The magnetic quantum number is an integer that specifies the orientation of an orbital around the nucleus, and s orbitals only have one possible orientation. This is why the ml value for an s orbital will always be 0. It is not possible for it to have any other value. For example, p orbitals, which have three orientations, can have ml values of -1, 0, or 1.

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b. deflects. A DC motor's magnet has a magnetic field that deflects the wire loop's magnetic field, therefore causing the loop to rotate.

When a conductor, through which an electric current passes, is immersed in a magnetic field, it experiences a deflects force according to the Law of Lorentz creating as result that the loop rotate.

A DC motor's magnet has a magnetic field that deflects the wire loop's magnetic field, therefore causing the loop to rotate.

Answer : Option B

Explanation:

It is said that electric field is always associated with the magnetic field and they influence each other. When a wire carrying current is placed near a magnetic compass, the needle present in the compass will deflect showing that there is a magnetic field associated with the set up. Every magnet has a magnetic field associated with it which causes deflection thereby making the loop to rotate.

Explanation:

An artesian system is one that connects with an accumulation of water (aquifer) whose surface or level is above the surface of the system or well.

In other words, the upper limit of the aquifer is higher than the opening through which the liquid flows in the artesian well. This has the advantage that the water spreads without needing to be pumped.

It should be noted that its name comes from the region of Artois, France, where in 1126 the oldest well in Europe was drilled with these characteristics.

Therefore:

Answer:

The process by which wind removes surface materials is called deflation.

Answer:

Moving water that flows over the land is called runoff. An area of wave-washed sediment along a coast is called a beach. Deflation is the process by which wind removes surface materials.

Explanation:

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Answer:

The sun

Explanation:

The sun is the only star in our solar system. It provides the ultimate source of energy for all parts of an ecosystem.

Light energy from the sun is used to drive photosynthetic processes. This process in turn provides food for all organism.

The energy of the sun is produced from the fusion of hydrogen nuclides  at great temperatures within the sun. The fusion process releases the energy which every part of the solar system needs.

Answer:

A gas behaves more like an 'ideal' gas at a higher temperature and lower pressure.

Explanation:

do to intermolecular forces becomes less significant compared to kinetic energy and the size of the molecules become less significant to the empty space between them.

Gases are most likely to behave ideally at high temperature and low pressure.

Gases tend to operate ideally at low and high temperatures because potential energy is less important than kinetic energy due to intramolecular forces. Also, the size of the molecule is less important in relation to the free space between the molecules.

Gasworks very ideally at high temperatures and low pressures. High temperature means that the molecules move fast and do not stick together. Low pressure means that the molecules are farther apart and have less interaction.

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Explanation:

An artificial satellite is one that is launched into space to orbit the Earth (or another body of the solar system) for various purposes.

In this sense, the characteristics of an artificial satellite will depend on its purpose and functionality. From there we can list: meteorological satellites (for weather) , telecommunications satellites, remote sensing satellites, global positioning systems satellites, environmental satellites, research satellites, among others.

In addition, their orbits can be classified according to their height and inclination, depending on the use they have.

On the other hand, one of the main conditions for a satellite to be considered as such is that it must be kept orbiting. This means, it must not touch land during its useful life, even if it remains in constant contact with its earth based control stations.

Therefore, a land-based is not a type of satellite.

An atom with atomic number 12 will tend to accept or share electrons in order to achieve a stable electron configuration.

The chemical behavior of an atom is largely determined by the behavior of the electrons in its valence shell. Atoms with eight electrons in their valence shell tend to be stable and are unlikely to participate in chemical reactions, while atoms with fewer than eight electrons in their valence shell tend to accept, donate, or share electrons in order to achieve a stable electron configuration.

An atom with atomic number 12, such as carbon, has six electrons in its valence shell. Carbon will tend to form chemical bonds with other elements by either accepting or sharing electrons, depending on the specific situation.

The average kinetic energy of the water molecules is greater in its gaseous state (in the form of water steam).

This is because in the gaseous state the water molecules are well separated from each other and can move freely in all the available space they have; because there are no cohesion forces that bond them.

In contrast to the liquid and solid state, in which the molecules have less movement.

Answer:

Choice 1: The particle shall move eastward as it travels through the room.

The electrical and magnetic force on the particle shall balance no matter whether the charge on the particle is positive or negative.

Explanation:

The question gives the magnitude of the charge on the particle but doesn't say anything about the sign of the charge on the particle. However, it turns out that whether this sign is positive or negative make no difference.

Start by considering the case that the charge on the particle is positive. What will be the direction of the electrical force on the particle?

The direction of an electrical field is same as the direction of electrical force on a particle with a positive charge. The electrical field in this room points downwards, which means that the direction of the electrical force on a positive charge will also point downward.

The particle will deflect downwards if the electrical force is the only force that acts on it. For the particle to go through the room undeflected, the net force on the particle shall be zero. The magnetic force shall balance the downward electrical force. In other words, the magnetic force on the positive particle shall point upwards.

The right-hand grip rule relates the following:

Here's how the rule work:

In this case, the magnetic field points toward the north (to the front). Therefore, when the four fingers are turned by 90° out of the palm, they shall point to the north. The magnetic force points upwards, such that the thumb shall point upward. Now, open the right hand such that the four fingers are in the plane of the palm. The four fingers now point toward the right, which is the same as east. In other words, by the right-hand rule, the conventional current shall point to the east of the room. The particle is assumed to be positive. To generate that eastbound current, the particle shall also move eastwards.

Now, what if the charge on the particle is negative?

In other words, the charged particle shall move towards east no matter whether the charge on the particle is positive or negative.

Final answer:

Explanation of the distances covered by two cars during acceleration and the comparison of their travel distances at t = 2T.

Explanation:

At the instant t = 2T, the distance between the two cars can be determined by calculating the distances each car covers during the acceleration phase.

Car A: dA = 0.5*A*T2

Car B: dB = 0.5*(A/2)*(2T)2 = 0.5*A*T2

Therefore, at t = 2T, both cars have traveled the same distance, so the statement Both cars have traveled the same distance is true.

Answer:

Moving point charges, such as electrons, produce complicated but well known magnetic fields that depend on the charge, velocity, and acceleration of the particles.

Answer:

moving and charged

Explanation:

Answer:

a 200 feet, and trains go  a whole mile even after hitting the brakes

Explanation:

it can take some of those large , industrial vehicles up to 200 feet to stop when traveling only 60 MPH. The correct option is B.

The vehicles like trucks or loaders transport the raw material or ready machines to the destination. They need to maintain a speed to timely reach the required location.

When these vehicles apply brakes, they will go as far as up to 200feet till they finally stop.

Thus, the correct option is B.

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Answer:

The answer that is most accurate would be the first one.

Explanation:

Actually, there are  2.54 centimeters in an inch. Use that as a tool for converting inches to centimeters:  

1 inch x 2.54 = 2.54 centimeters.

2 inches x 2.54 = 5.08 centimeters.

3 inches x 2.54 = 7.62 centimeters.

4 inches ...........

Transformers only work with AC.

If you put DC into a transformer, all that comes out is smoke.

(a)

Transformers will not work on direct current in electrical systems.

Answer: Option A

Explanation:

Transformers work only on the alternate current of electrical system. And they are not suitable to work upon with the direct current. As the direct current has the property to transfer high voltage directly and is unable to direct the current with high and low voltages, causes the transformer to burn out the coil leading to burning of the transformer circuit and causing smoked transformers.

Final answer:

To determine the rate at which a heated metal plate radiates energy, the Stefan-Boltzmann law is applied, incorporating the given emissivity, surface area, and absolute temperature to calculate a radiation rate of approximately 450.46 Watts.

Explanation:

To calculate the rate at which a square metal plate radiates energy, we need to apply the Stefan-Boltzmann law of radiation. The formula is: P = eT4, where o is the Stefan-Boltzmann constant (5.67 x 10-8 W/(m2 K4)), A is the surface area of the object, T is the absolute temperature in kelvin, and e is the emissivity of the material.

Given the square metal plate's side length of 14 cm (which we convert to 0.14 m for consistency in units), emissivity of 0.6, and a temperature of 745C (which is 1018 K in absolute temperature), we first calculate the surface area (A) of one side of the plate: A = (0.14 m)2 = 0.0196 m2. Since the plate has two sides, we double the area to account for both the top and bottom surfaces, resulting in 0.0392 m2.

The rate of energy radiated from the plate is then: P = (5.67 10-8 W/(m2 K4)) (0.0392 m2) (0.6) (1018 K)4. Calculating this we get:

P = 5.67

10-8

x 0.0392 m2

x 0.6

x (1018 K)4 = 450.46 Watts.

The metal plate thus radiates energy at a rate of approximately 450.46 W.

An atom that has gained or lost electrons is called an ion .

Answer:

ion

Explanation:

if a atom gains or loses electrons it is an ion cation are gained electrons and anion are lossed electrons

In the process of peppering the question with those forty (40 !) un-necessary quotation marks, you neglected to actually show us the illustration.  So we have no information to describe the adjacent positions, and we're not able to come up with any answer to the question.

Answer:

B) Energy has been added as heat to the gas

Explanation:

I'm pretty much sure that this is the answer, it's been awhile since I've done thermodynamics but it should be alright.

An increase in the temperature of a gas that is kept at constant volume is because: B. Energy has been added as heat to the gas.

Heat is also referred to as thermal energy and it can be defined as a form of energy that is transferred from one physical object to another, especially due to a difference in temperature.

Generally, heat is typically transferred between objects with different degrees of temperature and materials that are directly in contact with each other during the process of heat conduction.

For an ideal gas that is kept at constant volume, there is a change in its temperature because energy has been added as heat.

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