Unadjusted cost of goods sold is calculated by subtracting.

Answer:

686 N

Explanation:

OH BOY, NEWTONS LAWS OF MOTION!

look at this:

\(F = ma\)

a fun fact is that acceleration 9.8 m/s^2 is actually GRAVITY.

so lets do this and rewrite the formula...

\(F = 70kg * 9.8 m/s^2\)

lets multiply 70 and 9.8

we get 686 N.

if you want to be technical about it...... the answer should only have two sig figs. so it would be... \(6.9 * 10^{2}\) N

NICE!

Answer: 36.257 m/s

Explanation:

The vertical and horizontal components of a projectiles motion are completely independent of each other. The only thing they share is the amount of time in the air. Because they are independent, the acceleration of gravity cannot affect the horizontal acceleration. This means horizontal acceleration is 0. If the acceleration is 0, this means the velocity does not change horizontally. So the final velocity of the x component is equal to the initial.

Now if you actually imagine these two vectors, it forms a right triangle. So you can use the Pythagorean Theorem to find the resultant vector.

\(a^2+b^2=c^2\\18.3^2+(-31.3)^2 = c^2\\c = 36.257 m/s\)

Answer: a) 200 miles because your doing 2 hours and each hours is 100 miles  :)

Among the options given, "Forestry" is not considered one of the three most anthropogenic sources of greenhouse gas emissions. The correct answer is C. Forestry.

Greenhouse gas emissions refer to the release of gases into the atmosphere that contribute to the greenhouse effect and global warming. While all of the options mentioned - Industry, Transportation, and Energy - are major anthropogenic sources of greenhouse gas emissions, "Forestry" is not typically included among them.

The three primary sources of greenhouse gas emissions are generally recognized as Industry, Transportation, and Energy.

1. Industry: Industrial activities, such as manufacturing, construction, and chemical production, can release significant amounts of greenhouse gases into the atmosphere. These emissions are often associated with the burning of fossil fuels for energy, as well as industrial processes that produce emissions as byproducts.

2. Transportation: The transportation sector, including cars, trucks, airplanes, ships, and trains, is a significant contributor to greenhouse gas emissions. The combustion of fossil fuels in vehicles releases carbon dioxide (CO2) and other greenhouse gases into the atmosphere.

3. Energy: The energy sector, particularly the burning of fossil fuels for electricity generation, is a major source of greenhouse gas emissions. Power plants that rely on coal, oil, and natural gas release CO2 and other greenhouse gases when these fuels are burned.

While forestry can have an impact on the carbon cycle and the sequestration of carbon dioxide through deforestation and forest degradation, it is not typically included among the three most anthropogenic sources of greenhouse gas emissions.

However, it is important to note that land-use changes associated with deforestation can contribute to greenhouse gas emissions indirectly.

In conclusion, among the options provided, "Forestry" is not considered one of the three most anthropogenic sources of greenhouse gas emissions. The primary sources are Industry, Transportation, and Energy.

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Answer:

7 m/s

Explanation:

Find the total mass

m1+m2 = total mass

700kg+300kg = 1000kg

Find the velocity of each mass

v1 = 10m/s

v2 = 0m/s

Find the combined momentum

m1v1 + m2v2 = mfvf

(700)(10)+(300)(0)=(1000)(vf)

7000=1000(vf)

7=vf

So the velocity of the two cars rolling together is 7 m/s

Answer:

True, but we dont know for sure because humans have only ever saw one side of the sun

Explanation:

Answer:

Density =mass/volume 20/10=2

The density of a substance that has a mass of \(20 g\) and a volume of \(10 mL\) is \(2 g/cm^{3}\).

Density of substance is defined as its mass per unit volume. Density gives information about how tightly the substance is packed together. The formula for density is

\(d =\frac{m}{V}\)

Where,

\(d =\) density

\(m =\) mass

\(V =\) volume

Unit of density is grams per cubic centimetre.

One of the most common uses of density is in how different materials interact when mixed together.

Specific Gravity is the ratio of the substance's density to the density of water. An object having specific gravity less than one will float in water, while a specific gravity greater than one will sink.

Given

\(m = 20g\)

\(V = 10 mL= 10 cm^{3}\)

The density of substance is

\(d =\frac{m}{V}\\d =\frac{20}{10}\\d = 2 g/cm^{3}\)

Hence, The density of a substance that has a mass of \(20 g\) and a volume of \(10 mL\) is \(2 g/cm^{3}\).

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The evolution of energy matrices, the social and environmental consequences of energy sources, and the relationship between energy development and industrial development are critical aspects of understanding the interplay between energy and the modern world. Balancing the need for energy with sustainability and minimizing environmental impacts is a key challenge for societies today.

a) The evolution of the main energy matrices after the industrial revolution:

The industrial revolution marked a significant shift in the sources of energy used to power the growing industries and societies. Prior to the industrial revolution, human and animal labor, along with limited use of water and wind power, were the primary sources of energy. However, with the advent of steam engines and mechanization, there was a need for more abundant and efficient sources of energy.

Coal: Coal became the dominant energy source during the early stages of the industrial revolution. It provided the necessary fuel for steam engines and played a crucial role in powering factories, railways, and steamships.

Oil: The discovery and commercialization of oil in the late 19th century revolutionized the energy landscape. Oil became a major source of energy for transportation, as it fueled the internal combustion engines of automobiles, trucks, and airplanes.

Natural Gas: With the expansion of oil drilling, natural gas also emerged as an important energy source. It is used for heating, electricity generation, and as a feedstock for various industrial processes.

Nuclear Energy: The development of nuclear power in the mid-20th century introduced a new source of energy. Nuclear reactors harness the energy released from nuclear fission reactions to generate electricity.

Renewable Energy: In recent decades, there has been a growing emphasis on renewable energy sources such as solar, wind, hydroelectric, and geothermal power. These sources offer sustainable alternatives to fossil fuels, with lower environmental impact and the potential for long-term energy security.

b) The social and environmental consequences of these energy sources:

Each energy source has its own social and environmental consequences:

Fossil Fuels: The burning of fossil fuels, such as coal, oil, and natural gas, releases greenhouse gases and contributes to climate change. Extraction of fossil fuels can lead to habitat destruction, water pollution, and health hazards for workers and nearby communities.

Nuclear Energy: While nuclear energy does not produce greenhouse gas emissions during operation, it presents risks associated with accidents, radioactive waste disposal, and potential weaponization of nuclear materials. Public safety concerns and environmental risks have led to debates over the use of nuclear power.

Renewable Energy: Renewable energy sources offer benefits in terms of reduced greenhouse gas emissions and environmental sustainability. However, their deployment may require land use changes, and some technologies (e.g., large-scale hydroelectric dams) can cause ecological disruptions and displacement of communities.

c) The relationship between energy development and degree of industrial development:

Energy development and industrial development are closely intertwined. The availability of affordable and reliable energy sources is crucial for driving industrialization and economic growth. Access to abundant energy resources enables countries to power their industries, expand transportation networks, and improve living standards.

Countries that have invested in the development and exploitation of energy sources have typically experienced accelerated industrialization and technological advancement. The ability to secure and utilize energy resources efficiently has been a determining factor in a country's competitiveness and economic prosperity.

Conversely, countries that lack access to energy sources or fail to invest in their energy sectors may face challenges in industrial development. Limited energy availability can constrain production capacities, limit access to modern technologies, and hinder economic progress.

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1 - Incident ray

2 - Refracted ray

3 - Angle of incidence

4 - Angle of refraction

Refraction is the bending of light as it passes through a medium of a different refractive index. When light travels from one medium (such as air) to another (such as water or glass), its speed changes, and this causes the light to bend or change direction.

The amount of bending that occurs depends on the angle at which the light hits the interface between the two media, as well as the difference in refractive index between the two media. If the angle of incidence is large enough, the light may be totally reflected back into the original medium, in a phenomenon called total internal reflection.

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The thermal energy will be transferred from the air to the surface. Hence, the answer is false.

Thermal energy can be transferred from higher temperatures to lower temperatures. It is obey the second law of thermodynamics

"At a very microscopic level, it simply says that if you have a system that is isolated, any natural process in that system progresses in the direction of increasing disorder, or entropy, of the system."

It means that heat energy transferred from the higher temperature and the lower temperature states will absorb heat energy from the surrounding. The thermal energy will be transferred through conduction, convection, or radiation.

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The distance between the screen and the lens of the projector is approximately 6.19 cm.

To determine the distance between the screen and the lens of the projector, we can use the lens formula:

1/f = 1/v - 1/u

Where:

f = focal length of the lens (12.0 cm)

v = distance of the image (screen) from the lens (unknown)

u = distance of the object (display) from the lens (12.8 cm)

Plugging in the values into the lens formula:

1/12.0 = 1/v - 1/12.8

Now, let's solve for v:

1/v = 1/12.0 + 1/12.8

1/v = (12.8 + 12.0) / (12.0 * 12.8)

1/v = 24.8 / 153.6

v = 153.6 / 24.8

v ≈ 6.19 cm

Therefore, the distance between the screen and the lens of the projector is approximately 6.19 cm.

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Answer:

First you calculate the distance covered in First 3hrs then calculate the time for the remaining distance then add the total time

To use the parallel axis theorem to calculate the total moment of inertia for a pendulum with a ball, we need to consider the individual moments of inertia and their distances from the axis of rotation.

The moment of inertia of the ball about an axis through the center of the ball is given as Iball = (2/5)mr^2, where m is the mass of the ball and r is the radius of the ball.

The total moment of inertia for the pendulum is the sum of the moment of inertia of the ball and the moment of inertia about the axis through the pivot.

Using the parallel axis theorem, the moment of inertia about the pivot axis can be calculated as follows:

I = Iball + mb^2

Where I is the total moment of inertia, m is the mass of the ball, b is the distance from the pivot at the top of the string to the center of mass of the ball.

Therefore, the total moment of inertia for the pendulum is I = (2/5)mr^2 + mb^2.

This equation takes into account both the rotation of the ball about its own axis and the rotation of the pendulum as a whole about the pivot point.

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Answer:

During a solar flare a electrical power will be generated on earth

Answer:

the aurora borealis will be seen in the night sky

Explanation:

I think so..

Answer:

Amplitude—distance between the resting position and the maximum displacement of the wave

Frequency—number of waves passing by a specific point per second

Period—time it takes for one wave cycle to complete

wavelength λ - the distance between adjacent identical parts of a wave, parallel to the direction of propagation.

Tension - described as the pulling force transmitted axially by the means of a string, a cable, chain, or similar one-dimensional continuous object, or by each end of a rod, truss member, or similar three-dimensional object

The correct answer is: O The number of lines is equal to the number of equivalent hydrogens on the same atom plus one.

Peak splitting, or multiplicity, in ¹H NMR spectroscopy occurs due to the coupling between hydrogen atoms in adjacent positions. The number of lines observed in a peak can be predicted using the n + 1 rule, where n is the number of equivalent hydrogens on the same atom.

According to the n + 1 rule, if there are n equivalent hydrogens on the same atom, the peak will be split into n + 1 lines. Each line represents a different spin state resulting from the coupling with neighboring hydrogens. The intensities of these lines follow a specific pattern known as a multiplet.

Therefore, the number of lines observed in the peak is equal to the number of equivalent hydrogens on the same atom plus one.

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Answer:

Explanation:

Try adding what process they have to go through to become a scientists the try adding some things that you think they work on in the labs.

a) The expression for moment of inertia of the pendulum =T = 2π√(I/mg),

b) The pendulum for small oscillations T = 3.9 s and the value of g = 9.8 m/s²2.

c) The length will be L = √((60gT²2)/(7(4π)²2)).

A. The moment of inertia of the pendulum:

The moment of inertia, denoted by I, of the pendulum about its pivot point can be calculated by considering the individual contributions from the rod and the sphere.

B.expression for the period of the pendulum for small oscillations:

The moment of inertia of a solid sphere about an axis passing through its centre and perpendicular to its surface is given by (2/5)MR²2, where M is the mass of the sphere and R is its radius. In this case, the sphere is attached to the end of the rod, so its moment of inertia needs to be translated to the pivot point. We can use the parallel axis theorem, which states that the moment of inertia about an axis parallel to and a distance d away from an axis through the center of mass is given by I = I_cm + Md²2, where I_cm is the moment of inertia about the center of mass. In this case, the distance d is L/2, and the moment of inertia about the pivot point becomes (2/5)MR²2 + M(L/2)²2.

Therefore, the total moment of inertia of the pendulum about its pivot point is the sum of the contributions from the rod and the sphere:

I = (1/3)ML²2 + (2/5)MR²2 + M(L/2)²2.

Substituting R = L/2, we have:

I = (1/3)ML²2 + (2/5)M(L/2)²2 + M(L/2)²2.

Simplifying further:

I = (1/3)ML²2 + (1/5)ML²2 + (1/4)ML²2.

Combining the terms:

I = (7/60)ML²2.

Therefore, the moment of inertia of the pendulum about its pivot point is (7/60)ML²2.

The period of the pendulum for small oscillations can be determined using the formula:

T = 2π√(I/mg),

C. The length L that gives a period:

where T is the period, I is the moment of inertia about the pivot point, m is the mass of the pendulum (which is M in this case), and g is the acceleration due to gravity.

Substituting the expression for I obtained in

T = 2π√(((7/60)ML²2)/Mg).

Simplifying further:

T = 2π√((7L²2)/(60g)).

Therefore, the period of the pendulum for small oscillations is given by T = 2π√((7L²2)/(60g)).

To determine the length L that gives a period of T = 3.9 s, we can rearrange the formula obtained in part (b):

T = 2π√((7L²2)/(60g)).

Squaring both sides and isolating L:

(T/2π)²2 = (7L²2)/(60g).

Simplifying further:

L²2 = (60gT²2)/(7(4π)²2).

Taking the square root of both sides:

L = √((60gT²2)/(7(4π)²2)).

Substituting T = 3.9 s and the value of g, which is approximately 9.8 m/s²2 , the length L.

3.The moment of inertia of a uniform thin rod about its pivot point can be expressed as (1/3)ML²2, where M is the mass of the rod and L is its length.

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The average velocity is given by

Where d is the distance covered and t is the time taken.

For the given case, we have

d = 75 m

t = 8.9 s

Therefore, the average speed of the hockey player is 8.43 m/s

The hockey player is moving at a speed of 9.5 m/s.

a. Suspension Type Insulator Wire: A component used in overhead transmission lines to support and insulate the conductors from the supporting structures.

c. Corona Effect: The ionization of air surrounding a conductor due to a strong electric field, resulting in energy losses and other undesirable effects.

d. Sag of a Transmission Line: The vertical distance between a transmission line conductor and the straight line connecting the supporting structures, influenced by external factors such as temperature and load.

e. Reactance of a Line: The opposition offered by a transmission line to the flow of alternating current, determined by the line's inductance and capacitance.

A suspension type insulator wire is a component used in overhead transmission lines to support and insulate the conductors (wires) from the supporting structures. It consists of a series of insulator discs or units connected in a string.

The wire is suspended from towers or poles, and each disc is designed to withstand the electrical stress and mechanical tension imposed on the line.

Suspension type insulator wires provide insulation by preventing the flow of current between the conductors and the supporting structure, ensuring the safe and efficient operation of the transmission line.

The corona effect, also known as corona discharge, is an electrical phenomenon that occurs when an electric field around a conductor is strong enough to ionize the surrounding air molecules.

When the voltage on a conductor is high enough, the air near the conductor becomes ionized, creating a faint glow or hissing sound. This ionization process leads to the formation of a corona discharge, which can result in energy losses, audible noise, radio interference, and even damage to the conductor or nearby equipment.

Sag refers to the vertical distance between a transmission line conductor and the straight line connecting the supporting structures (towers or poles) at each end of the span.

Transmission lines are subject to various external factors such as temperature changes, wind, and conductor load, which can cause the conductors to expand or contract.

As a result, the conductors exhibit a natural curvature or sag between the support points. Sag is essential to maintain the mechanical integrity of the transmission line and prevent excessive tension or stress on the conductors.

Proper sag calculation and monitoring are crucial to ensure the safe and reliable operation of the line.

Reactance is a measure of the opposition offered by an electrical component or a transmission line to the flow of alternating current (AC). It is a complex quantity with both magnitude and phase angle.

The reactance of a transmission line represents the line's impedance to the AC current and is primarily dependent on the line's inductance and capacitance.

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Answer:

A black hole is a region of spacetime where gravity is so strong that nothing—no particles or even electromagnetic radiation such as light—can escape from it. The theory of general relativity predicts that a sufficiently compact mass can deform spacetime to form a black hole.

Answer:

they are mysteries

Explanation:

there is no good answer that I know of because we haven't studied that far out in space

Answer:

Fe = 2.4 × 10^10 N

Explanation:

Given the following :

q1 = charge 1 = 0.0072 C = positive direction

q2 = charge 2 = 0.0060 C = - ve direction

r = distance = 0.0040

Using the relation :

Fe = K(q1q2) /r^2

Where K = columb's constant = 9×10^9 Nm^2/C^2

Fe = electric force

Fe = 9×10^9(0.0072 * 0.0060) / 0.0040^2

Fe = [9×10^9 (0.0000432)] / 0.000016

Fe = 388,800 / 0.000016

Fe = 24300000000

Fe = 2.43 × 10^10 N

The force acting on a particle can be determined using the right-hand rule where the thumb points to the direction of the current and the fingers show the direction of the force.

The direction of the force acting on each particle can be determined using the right-hand rule. This rule involves pointing the thumb in the direction of the current and the fingers show the direction of the force. In the first image, the direction of the force acting on the particle can be determined by pointing the thumb to the right, then the fingers will curl upward indicating the direction of the force is upward.

In the second image, the direction of the force acting on the particle can be determined by pointing the thumb upward, then the fingers will curl towards the left indicating the direction of the force is to the left. In the third image, the direction of the force acting on the particle can be determined by pointing the thumb downward, then the fingers will curl towards the left indicating the direction of the force is to the left.

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A square wave can be synthesized as a series of odd harmonics, where the amplitude of each harmonic is given by the formula an = 1/(na). In this case, the amplitude of the fundamental frequency (a) is 10^-3 m.

We are asked to find the amplitudes of the first five harmonics in the series.

1. For the first harmonic (n = 1), the amplitude is:
  a1 = 1/(1 * 10^-3) = 1000 m
2. For the second harmonic, since n = 2 is not an odd integer, we skip it.
3. For the third harmonic (n = 3), the amplitude is:
  a3 = 1/(3 * 10^-3) = 333.33 m
4. For the fourth harmonic, again n = 4 is not odd, so we skip it.
5. For the fifth harmonic (n = 5), the amplitude is:
  a5 = 1/(5 * 10^-3) = 200 m
To summarize, the amplitudes of the first five harmonics in the square wave series are as follows: a1 = 1000 m, a3 = 333.33 m, and a5 = 200 m. Note that only odd harmonics contribute to the square wave, and even harmonics are not included in this analysis. The string vibrates at twice the fundamental frequency, which is the lowest possible standing wave. A wave is the vibration of a string. A vibrating string produces a sound with a constant frequency, or pitch, due to resonance. If the length or tension of the string is properly adjusted, a melodic tone will be created.

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HEY HEY HEY HEY

Explanation:

HEY HEY HEY HEY HEY

Since the electron dropped from an energy level i to the ground state by emitting a single photon, this photon has an energy of 1.41 × 10⁻¹⁸ Joules.

In order to determine the photon energy of an electron, you should apply Planck-Einstein's equation.

Mathematically, the Planck-Einstein equation can be calculated by using this formula:

E = hf

Where:

In this scenario, this photon has an energy of 1.41 × 10⁻¹⁸ Joules because the electron dropped from an energy level i to the ground state by emitting a single photon.

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Answer:

C. balancing the amount of energy that is taken in with the amount of energy that is released by the body

Explanation:

Edge 2021