A 1.00 kg log of wood is placed in a fireplace. after it burns, 0.04 kg of ash is left over. which best describes the flow of energy?

Answer:

It is lime. Basically, the lime is kinda too weak for it to produce. Thats what I remember my teacher saying. Hope this helps!

Explanation:

Answer:

Core: the temperature at the very center of the Sun is about 27 million degrees Farenheit (F). The temperature cools down through the radiative and convective layers that make up the Sun's core.

Explanation:

it is about 27 million degrees Fahrenheit

good luck :D

The relationship between period (T) and frequency (f) is that they are inversely proportional to each other. The relationship is expressed using the equation  f = 1/T or T = 1/f.

The relationship between period and frequency is inverse. Period refers to the time taken to complete one full cycle of a waveform, while frequency is the number of complete cycles that occur in one second. Mathematically, the relationship can be expressed as:

Frequency (f) = 1 / Period (T)  or  Period (T) = 1 / Frequency (f)

This means that as the frequency of a waveform increases, the period decreases, and vice versa. For example, if the frequency of a waveform is 50 Hz, then the period would be 1/50 = 0.02 seconds. Conversely, if the period of a waveform is 0.01 seconds, then the frequency would be 1/0.01 = 100 Hz.

In summary, the relationship between period and frequency is inverse, and can be expressed using the equations f = 1/T or T = 1/f.

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The sickle cell allele is still common in tropical regions because it provides protection against malaria, which is prevalent in those areas.

A cell is the basic unit of life and the smallest structure that can perform all the functions necessary for life.

The sickle cell allele is still common in tropical regions because it provides protection against malaria, which is prevalent in those areas. Malaria is caused by a parasite that is transmitted by mosquitoes, and it infects and destroys red blood cells.

Individuals who carry one copy of the sickle cell allele (known as sickle cell trait) are more resistant to malaria than those who do not have the allele. This is because the sickle-shaped red blood cells that result from the sickle cell allele are less hospitable to the malaria parasite than normal red blood cells.

However, individuals who carry two copies of the sickle cell allele (known as sickle cell disease) can experience serious health complications, including pain, anemia, organ damage, and early death.

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Answer:

Explanation:

5 C = 278 K

25 C = 298 K

V1 / T1 = V2 / T2

1.5L / 278 K = V2 / 298 K

V2 = (1.5L * 298) / 278

V2 = 1.61 L

Answer:disturbance

A wave is a  disturbance  that carries  energy  from one place to another.

Explanation:

edg2020

Answer:

its disturbance and energy for short

Explanation:

To change one pound of ice at 20°F to steam at 220°F, approximately 1,054 BTUs (British Thermal Units) are required.

To turn one pound of ice at 20°F to steam at 220°F, you need to supply approximately 1294 BTUs of energy. The process can be broken down into three steps.

Firstly, it requires approximately 144 BTUs to melt one pound of ice at 20°F into water at 32°F. Secondly, it takes around 180 BTUs to heat the water from 32°F to 212°F.

Finally, it takes approximately 970 BTUs to turn one pound of water at 212°F to steam at 220°F.

This process is known as the "heat of fusion" and "heat of vaporization," where a substance changes its state from solid to liquid, or liquid to gas, respectively. The energy required to undergo these state changes is referred to as latent heat. It is important to note that the amount of energy required to change the state of a substance is dependent on its mass.

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Option A is correct, conduction is the method by which the primary heat transfer mechanism does one end of a steel rod becomes hot when the other end is placed in a flame

Conduction is the manner with the aid of which heat is transferred from the warmer quit to the colder cease of an item. The ability of the item to behave warmth is known as its thermal conductivity and is denoted as k.

Heat spontaneously flows along a temperature gradient. for example, warmth is performed from the hotplate of an electric range to the bottom of a saucepan in contact with it. in the absence of an opposing external riding energy source, inside a frame or between bodies, temperature differences decay through the years, and thermal equilibrium is approached, temperature turning more uniform.

In conduction, the warmth glide within and via the body itself. In evaluation, in a warmness switch by using thermal radiation, the transfer is regular between bodies, which may be separated spatially. warmness also can be transferred by using a combination of conduction and radiation. In solids, conduction is mediated by way of the combination of vibrations and collisions of molecules, propagation and collisions of phonons, and diffusion and collisions of loose electrons. In gases and drinks, conduction is due to the collisions and diffusion of molecules at some stage in their random movement.

Photons in this context do not collide with one another, and so warmness delivery by using electromagnetic radiation is conceptually awesome from heat conduction by way of microscopic diffusion and collisions of cloth particles and phonons. but the difference is frequently now not easily found except the fabric is semi-transparent.

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Answer:

\( \huge{ \boxed{44 \: \: \text{inches}}}\)

Explanation:

To find the perimeter of the rectangle, we must first find the width of the rectangle given it's length and area then use it to find the perimeter of the rectangle.

Let the width be represented by w

Area of a rectangle = length × width

From the question.

Area = 105 sq. in

length = 7 in

\(105 = 7 \times w \\ 105 = 7w \: \: \: \: \: \: \\ \\ \frac{105}{7} = \frac{7w}{7} \\ w = 15\)

width = 15 in

Perimeter of a rectangle(p) = 2l + 2w

l is the length of the rectangle

w is the width of the rectangle

\(p = 2(7) + 2(15) \\ p = 14 + 30 \\ \\ p = 44\)

We have the final answer as

Human roles in energy transition are:

By taking these steps, you can actively contribute to the energy transition and be a part of the movement toward a more sustainable and clean energy future.

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Answer:

Explanation:

answer: 4 velocity.

if nominal gdp is 1800 and the money supply is 450, then what is velocity?

4 velocity.

If the nominal GDP is 1800 and the money supply is 450, then the velocity of money would be 4.

The total value of goods and services generated in an economy during a given time period, usually a year, is referred to as nominal GDP and is not adjusted for inflation. It depicts what products and services are now selling on the market.

Given:

Nominal GDP, PQ = 1800

Money supply, M = 450

From equation of exchange:

MV = PQ

V = (PQ) ÷ M

V = (1800) ÷ (450)

V = 4

Hence, if the nominal GDP is 1800 and the money supply is 450, then the velocity of money would be 4.

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Answer:59.3

Explanation:

The force due to gravity or weight is 582 N. The mass of a student  is 59.39 Kg.

A force is an effect that can alter an object's motion according to physics. An object with mass can change its velocity, or accelerate, as a result of a force. An obvious way to describe force is as a push or a pull. A force is a vector quantity since it has both magnitude and direction.

Force = mass.acceleration

582 = m*9.8

m = 59.39 Kg.

The force due to gravity or weight is 582 N. The mass of a student  is 59.39 Kg.

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Consider the Gaussian surface in the form of sphere, the electric field between the spheres is radially outwards.

For a positive charge, the electric field lines are projecting outwards of positive charge.

For a negative charge, the electric field lines are projecting inwards of positive charge.

Hence, the electric field points radially outwards.

The physical field that surrounds electrically charged particles, known as an electric field (or E-field), exerts force on all other charged particles in the field, either attracting or repelling them.  Additionally, it describes the physical environment of a system of charged particles. Time-varying electric currents and electric charges are the building blocks of electric fields. One of the four basic interactions (also known as forces) of nature, the electromagnetic field, manifests itself in both electric and magnetic fields.

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The primary effect of increasing the surface tension of the liquid is to increase the capillary force. Capillary forces arise due to the combined effects of adhesion and cohesion

When the surface tension of the liquid increases, the capillary rise will increase. It is because the increase in surface tension leads to an increase in the force that pulls the liquid upwards in a tube. is as follows;If you place a capillary tube in a beaker filled with water, the water surface inside the tube rises slightly higher than the level outside the tube.

This rise in water level is called capillary rise. The capillary rise is caused by the attraction between the molecules of the water and the molecules of the glass tube.This attraction is called capillary force or capillary action. The capillary force is due to the combined effect of adhesive and cohesive forces. The adhesive force is the attraction between the molecules of the liquid and the molecules of the solid surface, while the cohesive force is the attraction between the molecules of the liquid.

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They are maintaining their body temperature by cooling down, like dogs do, as they don't have enough sweat glands to keep them cool without panting.

Brown bears maintain body temperature by cooling as a result of panting. So, the correct option is D.

Normal human body-temperature is defined as the typical temperature range found in humans which is commonly referred to as 36.5–37.5 °C. The human body temperature varies. Temperature is known as the degree of hotness or coldness of an area or object.

When we are very hot, the blood vessels of the skin dilate to carry the excess heat to the surface of the skin. Brown bear panting ensures that cool air circulates over the moist surfaces in the mouth which helps maintain body temperature by cooling the body.

Therefore, the correct option is D.

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Question 16: The length of the antenna equals 7.54 cm, the correct option is (e) None of the above.

Question 18: There will be no propagating modes, the correct option is (e) None of the above.

Question 16: A Hertzian dipole antenna, placed in free space, has a radiation resistance of 492 when it is connected to a 100 MHz source. The length of this antenna equals

Given,

A Hertzian dipole antenna is placed in free space

The radiation resistance of the antenna when it is connected to a 100 MHz source is 492

We know that the radiation resistance of a short dipole antenna is given by

\(R_{r}\) = 80π²r²/λ²,

where, r = length of the antenna, λ = wavelength of the radiation.

Rearranging, r = λ/4 × √(\(R_{r}\)/π²)……..(1)

The formula for the wavelength is given by

λ = c/f

where, c = speed of light, f = frequency of the radiation.

Putting the values,

λ = 3 × 10⁸/100 × 10⁶ = 3 m

Putting the value of λ in equation (1),

r = 3/4 × √(492/π²) = 0.0754 m = 7.54 cm

Therefore, the length of the antenna equals 7.54 cm.

Hence, the correct option is (e) None of the above.

Note: The given radiation resistance is of a Hertzian dipole antenna but the question is asking the length of a short dipole antenna. So, we have used the formula for a short dipole antenna.

Question 18: An air-filled 3 cm x 1 cm rectangular metallic waveguide operates at 15.5 GHz. The number of propagating TM modes equals

Given,

Air-filled rectangular metallic waveguide has dimensions 3 cm x 1 cm

The operating frequency is 15.5 GHz.

We know that the maximum frequency of operation for TE₁₀ mode in a rectangular waveguide is given by

\(f_c\) = c/2a……(1)

where, c = speed of light, a = width of the waveguide (minimum dimension).

The formula for the cut-off frequency of TM₁₀ mode is given by

\(f_c\) = c/2b…….(2)

where, b = height of the waveguide (maximum dimension).

From equation (1), the width of the waveguide is given by

a = c/2\(f_c\)

From equation (2), the height of the waveguide is given by

b = c/2\(f_c\)

So, the cut-off frequency of TM₁₀ mode is given by

\(f_c\) = c/2b = c/2a

We have given the values of a = 1 cm and b = 3 cm.

So, we can write

\(f_c\) = c/2b = c/2a = 15.5 GHz

From the above equation, the cut-off frequency is 15.5 GHz which is the operating frequency of the waveguide.

So, there will be no propagating modes.

Therefore, the correct option is (e) None of the above.

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Answer: Core causes increase in magnetic flux in coil, hence greater change of magnetic flux.

Coil carrying alternating current has back emf.

Greater rate of change of magnetic flux causes back emf to increase.

Reduces net voltage & current decreases.

Light turns off because current decreases.

When iron core is removed back emf decreases & current increases, thus light turns on again.

The true statements about magnetic fields and forces will be A,D and E.

An iron piece,alloy, or other substance with its constituent atoms arranged in such a way that it shows magnetism qualities,

The function of the magnet is attracting other iron-containing objects or aligning itself in a magnetic field.

There are two poles of the magnet;

1. North Pole.

2. South Pole.

The same poles repel each other, while the opposite poles attract each other. In a sense, south-south and north-north repel. While the north-south and the south-north attract each other.

The correct statements are;

(A). The north pole attracts the south pole of a magnet.

(D)Forces caused by magnetic fields are weaker farther from the magnet.

(E)Magnetic forces can act on an object even if the object isn't touching the magnet.

Hence, the true statements about magnetic fields and forces will be A,D and E.

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weight of sweets and candy is 1.6kg

It is given that a total weight of 2 kg is allowed by the postal service

The weight of cookies is given to be 400gm

we know that 1kg =1000gm

400gm= 400/1000 gm =0.4kg

Therefore weight of sweets and candy that Amy can send=

total weight- weight of cookies

=2kg - 0.4kg

=1.6kg

Therefore, weight of sweets and candy is 1.6kg

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If an object was 1 mm across and it was magnified 10 times, it would be 10 mm across. Magnifying an object is essentially enlarging the object to make it appear bigger than it actually is.

The process of magnification is done by using a magnifying glass, microscope or telescope to focus the rays of light on the object. Magnification is used for various purposes such as reading, science, and even for entertainment.

For example, a magnifying glass can be used to closely observe the details of a small object, while a microscope can be used to study the structure of a cell. Similarly, a telescope is used to observe distant objects in the night sky. Magnification can also be used to create a magnified image of an object which can be viewed on a computer screen.

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When an object is released with an initial velocity upward, the direction of its acceleration is typically downward.

This is because the force of gravity, which acts on the object, pulls it in the opposite direction to its motion. According to Newton's second law of motion, the net force on an object is equal to its mass multiplied by its acceleration. In this case, the force of gravity acts as the net force, causing the object to accelerate downward.

The acceleration due to gravity is approximately 9.8 meters per second squared on Earth, and it acts downward towards the center of the planet. Therefore, when the object is released with an initial velocity upward, the gravitational force causes it to decelerate and eventually change direction, resulting in a downward acceleration. This downward acceleration opposes the initial upward velocity of the object until it eventually reaches its peak and starts to fall back down under the influence of gravity.

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Answer:

As the temperature increases, the volume of the material also increases. This is known as thermal expansion. It can also be explained as the fractional change in the length or volume per unit change in the temperature.

The relation between alpha, beta, and gamma is given in the form of a ratio and the ratio is 1:2:3 and can be expressed as:

alpha=fracbeta2=fracgamma3

Following is the relation between the three:

L = L (1 + α.ΔT)

Where, α is the coefficient of linear expansion  

A = A (1 + β.ΔT)

Where, β is the coefficient of aerial expansion

V = V (1 + γ.ΔT)

Where, γ is the coefficient of cubical expansion  

V = V + γV.ΔT

V = V (1 + γ.ΔT)  

L3 = L3 (1 + α.ΔT)3

L3 = L3 (1 + 3α.ΔT + 3α2.ΔT2 + α3.ΔT3)

L3 = L3 (1 + 3α.ΔT)

Alpha, beta, and gamma are related to one another in the form of a ratio, and that ratio is 1:2:3, and yes they are universal constants.

A substance's volume expands while its mass stays constant. Heating is typically the cause of expansion. When a substance is heated, the molecular bonds separating its particles weaken, the particles move more quickly, and the substance expands as a result.

Determine the relation as shown below,

L = L (1 + α × Δ T)

here, α is the coefficient of linear expansion  

A = A (1 + β × Δ T)

here, β is the coefficient of aerial expansion

V = V (1 + γ × Δ T)

here, γ is the coefficient of cubical expansion  

V = V + γ × V × Δ T

V = V (1 + γ × ΔT)  

L3 = L3 (1 + α × Δ T)3

L3 = L3 (1 + 3α × ΔT + 3α2 × ΔT2 + α3 × ΔT3)

L3 = L3 (1 + 3α × Δ T)

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Answer:

Yes

Explanation:

B. STATIC ELECTRICITY

IS THE CORRECT ANSWER.

JUST FOR MORE KNOWLEDGE ,,...

EVERY ATOM OF MATTER HAS ELECTRONS , AND THESE ELECTIONS HAVE NEGATIVE ELECTRIC CHARGE WHEN YOU RUB TWO OBJECTS TOGETHER, YOU CAN CAUSE THESE CHARGES TO MOVE FROM ONE OBJECT TO ANOTHER .THIS PULLING FORCE BETWEEN UNLIKE CHARGES IS CALLED STATIC ELECTRICITY .

Answer:

1.75 is the unit rate so yeah

Explanation:

One of the interesting things about projectile motion is that the horizontal motion is independent of the vertical motion. Recall that in freefall, an object continually experiences a downward acceleration of 9.80ms2 but has no horizontal acceleration.