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Answer: the intensity of sound at a rock concert will be 6.31 × 10^12 time louder than that of a whisper.

Explanation: Given that sound at a rock concert power is 130 dB of intensity l2

a whisper power is 2 dB of intensity l1

Using the formula

130dB - 2dB = 10Log(I2/I1)

128/10 = logI2/I1

12.8 = log (I2/I1)

I2/I1 = 6.31 × 10^12

Therefore, the intensity of sound at a rock concert will be 6.31 × 10^12 time louder than that of a whisper.

The sound at a rock concert is approximately 630,957,344 times louder than a whisper, as decibels (dB) are a logarithmic unit of sound intensity.

To compare the loudness of two sounds, we first need to understand that decibels (dB) are a logarithmic measure of sound intensity. A difference of 10 dB signifies a 10-fold increase in sound intensity. Therefore, the difference between the two sound intensities in this case - the rock concert's 130 dB and the whisper's 2 dB - is 128 dB. To convert this into times louder, we would divide the difference by 10[tex](128/10 = 12.8)[/tex] and then use that result (12.8) as a power of 10. Hence, the amplitude of the sound at a rock concert is approximately 630,957,344 times louder than that of a whisper.

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Answer:

Rubber is an insulator.

Explanation:

Rubber is an insulator. Electricity will always travel "the path of least resistance." Rubber has a very high resistance, so electricity will go somewhere else to find ground.

Answer:

Yes

Explanation:

Genecon is hand operated power generator. So, it can be use to charge a battery.

Final answer:

Yes, both a battery and a Genecon act like pumps for charge.

Explanation:

A hair dryer is a pump for air, and yes, a battery and a Genecon act like pumps for charge. In a battery, an external electrical current is provided to pump the electron flow in the uphill direction, recharging the battery. Similarly, in a Genecon, mechanical energy is converted into electrical energy by rotating a coil inside a magnetic field, acting as a pump for charge.

When it comes to devices that use AC (alternating current), such as hair dryers, the AC potential from the power grid pushes charges back and forth in the circuit of the device, creating an alternating current.

Answer:

A.

Explanation:

Answer:

A. It will transform into other forms of energy.

Explanation:

According to the law of conservation of energy, energy is never created or destroyed. Only changed from one form into another.

Answer:

B) Polonium(Po)

Answer:

I would say the correct answer is Option D

Explanation:

The united states not only has freedom of religion, but also the ability to become a naturalized citizen if you're an immigrant. Because of this we live in a very diversely populated country both racially as well as religously which overall means ethnically but hey, what do i know?

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Answer:

In both locations pictured here, the hydrosphere is the main agent responsible for eroding or breaking down the geosphere (rocks). Differences in the amount of precipitation each area receives and the state of the water (liquid or solid) where it contacts rocks result in different kinds of erosion and landforms

Explanation:

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The hydrosphere interacts with the geosphere through processes like erosion, weathering, and the formation of landforms.

The hydrosphere, which refers to all of the water on and below the Earth's surface, interacts with the geosphere through various processes. One example is the erosion of land by water, where rivers and streams carry sediment and deposit it in new locations, shaping the Earth's surface. Another example is the weathering of rocks by water, where water seeps into cracks and breaks down rocks over time. Additionally, the hydrosphere and geosphere interact through the formation of landforms such as oceans, lakes, and mountains.

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Final answer:

To reduce the risk of fire spread in a building, it is essential to install fire sprinkler systems and ensure minimum levels of security. Material choice, space planning, regular maintenance, proper storage, and adherence to fire safety procedures are all critical measures. Safe evacuation practices and fire suppression innovations also contribute to fire safety.

Explanation:

Reducing the Risk of Fire Spread in a Building

Taking into account the chemistry and physics of fire, several strategies can be implemented to reduce the risk of fire spread in a building. One crucial element is the installation of minimum level of security and fire sprinkler systems, which can provide an immediate response to a fire, potentially containing it or putting it out before it spreads. A solid understanding of the fire triangle (oxygen, fuel, and ignition source) informs that limiting any of these can help prevent fires.

Additionally, using materials with low flammability for construction and interior design, as well as careful planning of space to avoid fuel load concentration, can greatly reduce the risk of fires. Regular inspections and maintenance of electrical systems, proper storage of flammable materials, and the implementation of smoke detectors and alarms are vital. Fire safety education and clear procedures for evacuation are equally important to ensure the safety of individuals in case of a fire. Furthermore, innovative solutions such as fluorinated foams can help extinguish fires more efficiently when they occur.

Answer:

Wavelength, [tex]\lambda=2.94\ m[/tex]

Explanation:

It is given that,

Speed of radio waves is [tex]v=3\times 10^8\ m/s[/tex]

Frequency of radio waves is f = 101,700,000 Hz

We need to find the wavelength of WFNX’s radio waves. The relation between wavelength, frequency and speed of a wave is given by :

[tex]v=f\lambda[/tex]

[tex]\lambda[/tex] is wavelength

[tex]\lambda=\dfrac{v}{f}\\\\\lambda=\dfrac{3\times 10^8}{101,700,000}\\\\\lambda=2.94\ m[/tex]

So, the wavelength of WFNX’s radio waves is 2.94 m.

The wavelength of WFNX’s radio waves with the given speed and frequency is 2.95m.

Given data in the question;

wavelength; [tex]\lambda =\ ?[/tex]

To determine the wavelength of the radio wave, we use the expression for the relations between wavelength, frequency and speed.

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

Where [tex]\lambda[/tex] is wavelength, f is frequency and c is the speed.

We substitute our given values into the equation

[tex]\lambda = \frac{3*10^8m/s}{1.017*10^8s^{-1}}\\\\\lambda = 2.95m[/tex]

Therefore, the wavelength of WFNX’s radio waves with the given speed and frequency is 2.95m.

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Answer:

True

Explanation:

It represents the flow of electrons through a conductive material, such as a metal wire. It is measured in amperes. The SI unit of electrical current is the ampere, defined as 1 coulomb/second.

Answer:

True

Explanation:

Answer:[tex]E=33.71\ J[/tex]

Explanation:

Given

No of atoms of hydrogen [tex]N=5.54\times 10^{21}[/tex]

Temperature of room [tex]T=21^{\circ}\approx 294\ K[/tex]

Thermal energy of the atoms is given by

[tex]E=\frac{3}{2}NkT[/tex]

where k=boltzmann constant

[tex]E=\frac{3}{2}\times 5.54\times 10^{21}\times 1.38\times 10^{-23}\times 294[/tex]

[tex]E=33.71\ J[/tex]

Hence the energy of the atoms is [tex]33.71\ J[/tex]

Final answer:

The thermal energy of hydrogen atoms at 21°C can be calculated using the average kinetic energy per atom, which is determined by the equipartition theorem (⅒kT), and multiplying it by the total number of atoms in the sample.

Explanation:

To find the thermal energy of hydrogen atoms in a sample at room temperature (21°C), we need to use the equation for the average kinetic energy per molecule due to thermal motion, which is given by the equipartition theorem. The equipartition theorem states that each degree of freedom contributes (⅒)kT to the energy, where k is Boltzmann's constant (1.38 × 10⁻²³ J/K) and T is the temperature in Kelvin. For monoatomic gases like hydrogen as atoms, they have three degrees of freedom (translational motions along x, y, and z axes).

First, convert the given temperature from degrees Celsius to Kelvin: T(K) = 21°C + 273.15 = 294.15 K.

Then, calculate the average kinetic energy per hydrogen atom: KE_avg = (⅒)kT.

Finally, multiply the average kinetic energy by the number of atoms to get the total thermal energy: Thermal Energy = KE_avg × number of atoms. Don't forget, the 'number of atoms' given in the question is in scientific notation, where 5.54 × 10²¹ actually means 5.54 times 10 raised to the power of 21.

Therefore, Thermal Energy = (⅒) × (1.38 × 10⁻²³ J/K) × 294.15 K × 5.54 × 10²¹ atoms.

When you calculate the above expression, that will give you the thermal energy of the hydrogen atoms in Joules.

Answer:

c. trillions of cells

Explanation:

Every animal has trillions of cells to function

The majority of animals have millions of cells, while various species have varying quantities. For example, there are more than 40 trillion cells in an adult human. Thus option C is correct.

The animal body contains a variety of cell kinds. Skin cells, muscle cells, blood cells, fat cells, nerve cells, sex cells, and stem cells are a few examples of common animal cell types.

Skin or epithelial tissue is composed of skin cells. The cells that make up muscular tissue are referred to as  muscle cells.

All animals have numerous cells that work together to build the entire organism because they are multicellular. These cells in more complex species, like humans, may be highly specialized to carry out various tasks.

The lion, like all mammals and other creatures, is formed of eukaryotic cells, which contain DNA, ribosomes, and cytoplasm in addition to many other organelles.

Therefore, A large animal, such as a lion is made of trillions of cells.

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Answer:

C. A transistor

Explanation:

A device that is similar to a sandwich that has layers of semiconductor is known as the transistor. Hence, option C is correct.

A transistor is a semiconductor signal-generating, regulating, and amplifying device. Integrated circuits, or "microchips," which frequently have billions of these tiny components etched onto their glossy surfaces, use transistors as their active parts.

Transistors, which are present in practically every electronic component, have evolved into the brain cells of the age of information.

The emitter, collector, and base—or, in more recent electrical applications, the source, drain, and gate—are the three electrical leads that commonly make up a transistor.

The ability of the semiconductor material to conduct electric charge, which in most applications moves here between emitter (or sources) and collector (or drain), is influenced by an electrical signal supplied to the bases (or gate).

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Answer:

they don't have a charge

Explanation:

the neutrons are neutral :)

Neutrons in an atom's nucleus are electrically neutral and have no charge, contrasted with positively charged protons; both contribute equally to the atomic mass.

The neutrons within the nucleus of an atom have no charge. Neutrons are one of the two types of particles found in the nucleus, the other being protons. While protons carry a positive charge, neutrons are electrically neutral. In other words, they do not possess any charge, neither positive nor negative.

This unique property of neutrons allows them to add to the mass of an atom without affecting its charge. Furthermore, the mass of both protons and neutrons is represented as 1 atomic mass unit (amu), making them essential for the atomic mass. However, in terms of electrical contribution, neutrons play no role in the charge of the atom.

Answer:

c. 40 N/m

Explanation:

EE = ½ kx²

5 J = ½ k (0.5 m)²

k = 40 N/m

Answer:

The law of definite proportions states that a given chemical compound always contains the same elements in the exact same proportions by mass.

Explanation:

Answer:

They all burn fossil fuel is the correct answer.

Explanation:

Cars, power plants, and furnaces all burn fossil fuels such as coal, natural gas, heavy oils, petroleum, oil.

Burning of these fossil fuels results in a release of a huge amount of carbon dioxide and sulfur dioxide gas, into the surrounding that causes air pollution, global warming, acid rain, and these gases present in the environment are highly corrosives and makes suffocating in the environment.

Cars, power plants, and furnaces all run on the process of combustion where chemical energy is transformed into heat and mechanical energy, often using fossil fuels.

Cars, power plants and furnaces all share a common mechanism - they convert chemical energy into heat and mechanical energy. This process is known as combustion. Fossil fuels such as coal, oil, or natural gas are commonly used in these devices. During combustion, chemical reactions occur that release energy in the form of heat. The heat produced can be used directly, as in a furnace, or to do work, like turning the wheels of a car or generating electricity in a power plant.

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Answer:

Electromagnetism has important scientific and technological applications. It is used in many electrical appliances to generate desired magnetic fields. It is even used in a electric generator to produce magnetic fields for electromagnetic induction to occur. It has many more technological applications including MRI scanning (magnetic resonance imaging) and electric bells.

Explanation:

Electromagnets are widely used as components of other electrical devices, such as motors, generators, electromechanical solenoids, relays, loudspeakers, hard disks, MRI machines, scientific instruments, and magnetic separation equipment.

Answer:

Covalent

Explanation:

Took the test and got it right :)

A covalent bond is a type of bond where two or more atoms share electrons.

The type of bond that shows two or more atoms sharing electrons is covalent.

A covalent bond is formed when two or more atoms share electrons in order to achieve a stable electron configuration. These shared electrons are found in the outermost energy level of the atoms involved.

For example, in a water molecule (H2O), each hydrogen atom shares its electron with the oxygen atom, resulting in a covalent bond.

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Answer:

A. Light can travel trough air and space.

Explanation:

A vacuum is space that has no air inside of it. Since light is able to go through 'nothing' and matter, your answer must be A.

Answer:

A) Both water and a vacuum

Explanation:

Sound is a mechanical wave that requires a medium such as air or water to travel through. A laser on the other hand can travel through some mediums and vacuum.  

Answer:

Explanation:

320 k Cal = 320 x 4.18 k J

= 1337.6 kJ

For rise in temperature the formula is

Q = m s Δ T

Q is heat added , m is mass of the water to which heat is added , s is specific heat of water , Δ T is rise in temperature .

1337.6 x 10³ = 1.5 x 4.18 x 10³ x  Δ T ( specific heat of water is 4.18 kJ per kg.)

ΔT is more than 70 degree . That means , heat is sufficient to boil it .

So final temperature will be 100 degree Celsius.

Answer:

a) 4500 cycles b) 0.0667s c) 6.67s

Explanation:

a) 15 Hz= 15 cycles/ s

   5 mins= 300s

   15 cycles/s * 300s= 4500 cycles

b) Period= 1/ frequency

   Period= 1/ 15 cycles/s

   Period= 0.0667s

c) Period * number of revolutions= time

  0.0667 * 100= 6.67s

Answer:

A hope this helps

Explanation:

Final answer:

The cork flying off in a straight line after being released exemplifies Newton's first law of motion, which states that an object will continue at a constant velocity unless acted upon by an external force.

Explanation:

The scenario described where a cork flies off in a straight line after being released from circular motion is an example of Newton's first law of motion. This law, also known as the law of inertia, states that an object will remain at rest or in uniform motion in a straight line unless acted upon by an external force. In the case of the cork, once it is no longer constrained by the tension of the string (which provides the centripetal force necessary for circular motion), it continues in a straight line (the tangent to the circle at the point of release) because there's no other force acting on it to change its state of motion.

In contrast, Newton's second law focuses on how the acceleration of an object is related to the forces acting on it and its mass. Newton's third law deals with action-reaction force pairs, stating that for every action there is an equal and opposite reaction. The concept of a fourth law of motion does not exist in Newtonian physics, which includes only three laws of motion.

Sound is a longitudinal wave, where the particles vibrate back and forth in the direction the wave is moving. It cannot travel in a vacuum as there are no particles to transmit the wave.

Sound is an example of a longitudinal wave. This is because, in a longitudinal wave, the motion of the particles in the wave is in the same direction as the motion of the wave itself. When you speak for example, your voice creates a sound wave which makes the particles in the air vibrate back and forth in the same direction as the sound is traveling. On the contrary, transverse waves have particles that vibrate at a right angle to the direction of the wave, and the propagation of sound is not possible in vacuum (space devoid of matter) as there are no particles to vibrate and transmit the sound wave.

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Answer:

T cell

Explanation:

Answer:

Magnetic Domain, Magnetic Pole, Magnetic Field, and Ferromagnetic Material

Explanation: I just got 100 in my assigment

A cluster of atoms whose magnetic fields are aligned in the same direction is Magnetic Domain.

The end of a magnet where the force is the strongest is the Magnetic Pole.

The region where a magnetic force is exerted is the Magnetic Field.

A substance that is easily magnetized is a Ferromagnetic Material.

The magnetic field is the region of space where a charged object experiences magnetic force when it is moving.

When the atoms of an object having magnetic field in same direction is called magnetic domain.

When a charged object moves in the magnetic field of other object, the magnetic force is experienced.

The pole is the point where the magnetic force is maximum. Bar magnets has two poles.

A substance which is easily magnetized is the ferromagnetic material.

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