Where is the epicenter of the earthquake located?

Answer:

who knows bsf

Explanation:

Answer:

A) Moves closer together

Answer:

B) Polonium(Po)

Answer:If you bring a negative object near the electroscope, the electrons in the scope will be repelled toward the leaves, balancing the charge. The leaves will move toward each other.

When the negatively-charged rod is brought close to the electroscope, positive charges are attracted to it and negative charges are repelled away from it.

This is called charging by conduction. Figure 2 (c) Charging by Conduction The negatively charged rod touches the knob on the electroscope. The result is a transfer of electrons from the rod to the knob, making the knob, rod, and gold foil all negative, and making the gold foil deflect from the vertical.

Explanation:

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.

The amount of electrons inside an atom's outer shell governs the chemical reactivity and ability to bind with other elements, and this relationship between an element's valence and chemical activity can be seen.

In chemistry, an element's valence—also called valency—determines the number of other atoms that an atom of the metal can combine with.

The phrase, which was first used in 1868, is used to indicate both the broad power of a combination of elements and its numerical value. For 19th-century chemists, the explanation and systematization of valence presented significant difficulties.

The majority of the work was on developing empirical rules for finding the connotations of the elements because there was no good hypothesis explaining its source.

For 19th-century chemists, the explanation and systematization of valence posed significant difficulties. The majority of the effort was focused on developing empirical guidelines for finding the electron orbitals of the components because there was no good theory for its cause.

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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:

It is made up of iron, steel or any other ferromagnetic substance or ferromagnetic composite, having permanent magnetic properties. The magnet has two poles: a north and a south pole. When you suspend it freely, the magnet aligns itself so that the north pole points towards the magnetic north pole of the earth.

The type of magnetism present in a bar magnet is permanent. The correct option is D.

A substance which is negative charged at one end and positive charged at another end creating the magnetic field around it.

A bar magnet also has magnetic fields around it. In the presence of magnetic force fields, any magnetic object will be attracted to it.

It is made up of iron or steel or any other ferromagnetic substance which have permanent magnet properties.

The magnet has two poles: a north and a south pole. When you suspend it freely, the magnet aligns itself so that the north pole points towards the magnetic north pole of the earth.

So, the type of magnetism present in a bar magnet is permanent.

Thus, the correct option is D.

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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:[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:

I think the answer would be antigens

Explanation:

Answer: C

1054 g

Explanation:

Given that the object is in the shape of semi sphere with diameter of 8.2cm. And density of 7.3g/cm^3.

From definition of density,

Density = mass/volume

Volume of a half - sphere = 2/3πr^3

Volume = 2/3 × 3.143 × 4.1^3

Volume = 144.35 cm^3

Let make mass the subject of formula

Mass = Density × volume

Mass = 7.3 × 144.35

Mass = 1053.74g

The mass of the paperweight, in grams is 1054

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:

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:

D newton

Explanation:

he did extensive research on gravity, and gravity is what holds planets in orbits.

Answer:

Kinetic and heat energy (heat as thermal)

Explanation:

The friction of the rubbing builds up the energy, so it cant be the types of energy like light or sound

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: Convection :)

Answer:

D.  Convection

Explanation:

The air inside the refrigerator is cooled by convection, which circulates colder air around the food and warmer air out of the refrigerator.

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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Answer: The moon

Explanation: the moon is not on the earth

Earth's biosphere consists of the Pacific Ocean, Rocky Mountains, and Cuba (country), hence the moon is not part of the biosphere, so option 2 is correct.

The biosphere is a relatively narrow layer of the Earth's surface that supports life. It starts a few kilometers up in the atmosphere and ends at the deep ocean vents. The biosphere is a vast ecosystem made up of biotic (living things) and abiotic (nonliving) components, from which living things (biota) get their energy and nutrition.

Earth was a barren planet with shallow seas and a thin band of gases before life appeared there. These gases were primarily carbon dioxide, carbon monoxide, molecular nitrogen, hydrogen sulfide, and water vapor. The planet was hostile and desolate. The lithosphere (rock and soil), hydrosphere (water), and atmosphere make up this entirely inorganic state of Earth, which is known as the geosphere (the air).

Therefore, Earth's biosphere consists of the Pacific Ocean, Rocky Mountains, and Cuba (country).

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Answer:

A.

Explanation:

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

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:

The four types of musical instruments are percussion, woodwind, brass, and strings.

Explanation:

Percussion instruments include drums, triangle, cymbals, and xylophones. There are more instruments than what i've mentioned though. Percussion instruments often produce the beat of songs.

Woodwind instruments include clarinets, oboe, flute, and saxophone. Woodwind instruments often produce the harmony of songs and, occasionally, the melody.

Brass instruments include trumpet, trombone, french horn, and tuba. Brass instruments often produce the harmony of songs, the trumpet produces the melody a lot though.

String instruments include guitars, violins, cello, bass, ukulele, and banjo. String instruments produce both the harmony and the melody. These instruments often produce really beautiful music, in my opinion.

The four types of musical instruments are aerophones, chordophones, membranophones, and idiophones.

The four types of musical instruments are:
Aerophones (wind instruments): These instruments create sound by using air as the main component. Examples include flute, trumpet, and saxophone.
Chordophones (stringed instruments): These instruments produce sound by vibrating strings. Examples include guitar, violin, and piano.
Membranophones (instruments with a membrane): These instruments create sound by using a vibrating membrane. Examples include drums and tambourines.
Idiophones (self-sounding instruments): These instruments produce sound through their own vibrations. Examples include xylophone, maracas, and cymbals.

Answer:

Electric current, I = 4.08 A    

Explanation:

We have,

Power of vacuum cleaner is 500 W

Resistance of vacuum cleaner is 30 ohms

It is required to find the current flowing through the vacuum cleaner. It can be calculated using the definition of power delivered. Its formula is given by :

[tex]P=I^2R[/tex]

I is electric current

[tex]I=\sqrt{\dfrac{P}{R}} \\\\I=\sqrt{\dfrac{500}{30}} \\\\I=4.08\ A[/tex]

So, the electric current flowing through the vacuum cleaner is 4.08 A.

Answer:

A,D,F

Explanation:

The equations that represent the relationship between wavelength and frequency for a sound wave are:

v = lambdaf

A = StartFraction v over f EndFraction.

f = StartFraction v over f EndFraction.

Frequency and wavelength are inversely proportional to every other. The wave with the greatest frequency has the shortest wavelength. two times the frequency manner one-1/2 the wavelength, for this reason, the wavelength ratio is the inverse of the frequency ratio.

In physics, the wavelength is the spatial period of a periodic wave—the space over which the wave's shape repeats. It's far the gap between consecutive corresponding factors of the same phase at the wave, including two adjacent crests, troughs, or zero-crossings, and is a function of each journeying wave and standing waves, as well as other spatial wave styles.

The inverse of the wavelength is called the spatial frequency. Wavelength is normally unique with the aid of the Greek letter lambda (λ). The term wavelength is also every now and then implemented to modulated waves, and to the sinusoidal envelopes of modulated waves or waves shaped via interference of numerous sinusoids.

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Answer:

c. 40 N/m

Explanation:

EE = ½ kx²

5 J = ½ k (0.5 m)²

k = 40 N/m