Calculate the current through R2.

Calculate the current through R1.

Calculate the potential drop across R2.

Calculate the total power developed in the circuit.

Calculate the total resistance.

Calculate the potential drop across R1.

In electromagnetic waves, energy is transferred through vibrations of electric and magnetic fields. In sound waves, energy is transferred through vibration of air particles or particles of a solid through which the sound travels. In water waves, energy is transferred through the vibration of the water particles.

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Answer:

Sound waves transfer energy by causing successive compressions and rarefactions in the particles of the medium without transporting the medium particles themselves.

Explanation:

Sound in solids can also manifest as transverse waves, causing crests and troughs in the propagation medium. Waves can be characterized by two basic parameters: amplitude and frequency. Focusing on a single point vibrating in a medium excited by a sound wave, amplitude is the maximum distance traveled by the vibrating point relative to its rest position. Taking a snapshot of a propagating sound wave at any instance shows consecutive compressions and rarefactions, regions in which the medium material is compressed together and spread widely apart, respectively. The distance between the centers of two successive compressions or rarefactions is the wavelength of the wave. The frequency is the inverse of the wavelength, so the larger the frequency, the smaller the wavelength. Having a higher frequency makes the wave have a larger number of more closely-grouped compressions and rarefactions as it propagates. As the amplitude and frequency of the wave increase, the energy transferred by the propagation of the wave also increases. Extremely short but low-amplitude ultrasonic waves can be used to heat polymer materials and weld them together.

a. 1.51 s

In this part of the problem, we are only interested in the horizontal motion of the ball. Along the horizontal direction, the motion of the ball is a uniform motion with constant velocity, which is equal to the horizontal component of the initial velocity:

[tex]v_x = v_0 cos \theta = (19.0 m/s)(cos 40^{\circ})=14.6 m/s[/tex]

So, the ball travels horizontally at a speed of 14.6 m/s; in order to cover the distance of d = 22.0 m that separates it from the wall, the time need is

[tex]t=\frac{d}{v_x}=\frac{22.0 m}{14.6 m/s}=1.51 s[/tex]

b. 7.25 m

We now know that the ball takes 1.51 s to hit the wall, 22.0 away. Now we have to analyze the vertical motion of the ball, which is an accelerated motion with constant acceleration g =9.8 m/s^2 towards the ground (acceleration due to gravity).

The initial vertical velocity is

[tex]v_{y0}=v_0 sin \theta=(19.0 m/s)(sin 40^{\circ})=12.2 m/s[/tex]

The vertical position of the ball at time t is given by the equation

[tex]y(t)=v_{0y} t -\frac{1}{2}gt^2[/tex]

We know that the ball hits the wall at t=1.51 s, so if we substitute this value into the previous formula, we find at what height y the ball hits the wall:

[tex]y(1.51 s)=(12.2 m/s)(1.51 s)-\frac{1}{2}(9.8 m/s^2)(1.51 s)^2=7.25 m[/tex]

Answer:

[tex]1.25\cdot 10^5 eV[/tex]

Explanation:

The energy of the incident electron is equal to the energy acquired by the X-rays photon emitted by the tube, which is given by

[tex]E=\frac{hc}{\lambda}[/tex]

where

h is the Planck constant

c is the speed of light

[tex]\lambda[/tex] is the wavelength

In this problem, the wavelength of the photon is

[tex]\lambda=1.0\cdot 10^{-11} m[/tex]

Therefore, the energy is

[tex]E=\frac{(6.63\cdot 10^{-34} Js)(3\cdot 10^8 m/s)}{1.0\cdot 10^{-11} m}=2.0\cdot 10^{-14} J[/tex]

And keeping in mind that

[tex]1 eV = 1.6\cdot 10^{-19} J[/tex]

We find the energy in electron volts:

[tex]E=\frac{2.0\cdot 10^{-14}J}{1.6\cdot 10^{-19} J/eV}=1.25\cdot 10^5 eV[/tex]

Answer:

C

Explanation:

Explanation:

To provide the leverage needed to produce enough force to overcome what you're trying to cut.

Answer:The anwser is B i Promise ok

Explanation:

Answer: B

Explanation: I just did it.

There are two qualities that can describe most variables - direction and magnitude. A vector possesses both a direction and magnitude, while a scalar possesses only a magnitude.

Hope this helps!

Answer:

It can be described on by its magnitude

MAGNITUDE

Explanation:

Vector quantities are described by their magnitude and their direction both

so all vector quantities like velocity etc need direction and magnitude both like velocity is given as 60 km/h towards North direction

But for scalar quantities we defined them only by their magnitudes

Like here if we define mass then we do not require any direction for its complete explanation.

so here correct answer will be

MAGNITUDE

Loss of soil not protected by plant cover can be caused by erosion, pollution, and overuse/improper farming practices.

Loss of soil that is not protected by plant cover can be caused by various factors:

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Answer:

force of gravity

Explanation:

The force of gravity is that which draws the bodies towards the surface of the Earth.

 The force of gravity brakes the objects that move up and accelerates those that move down. It causes a parabolic movement in what we throw upwards,

The download pull of an object due to gravity is the object's weight.

Explanation:

When an object is thrown upwards from a certain height, it goes to a certain distance and then due to a downward force experienced by the object from the ground, it  makes it to fall towards the ground.

This downward force is called as acceleration due to gravity and the pull is being experienced due to object's weight.

Answer:

this is a diagram illustrating the valance electrons on an oxygen atom

The diagram represents an oxygen atom Option A

An oxygen atom is a chemical element represented by the symbol "O" on the periodic table. It is classified as a non-metal and has an atomic number of 8, indicating the number of protons in its nucleus. The most common isotope of oxygen, found in nature, is oxygen-16, meaning it has 8 protons and 8 neutrons.

Oxygen is essential for life and is a crucial component of many compounds, including water (H2O) and various organic molecules. It plays a vital role in cellular respiration, the process by which living organisms extract energy from nutrients.

The electron configuration of an oxygen atom is 1s² 2s² 2p⁴, indicating the distribution of its eight electrons in different energy levels and orbitals.

Oxygen atoms tend to form covalent bonds with other atoms, sharing electrons to achieve a stable configuration. Molecular oxygen (O2) is a diatomic molecule, consisting of two oxygen atoms bonded together.

Answer:

C. The outer ear has to collect the sound waves and lead them to the middle ear.

Explanation:

In the process of hearing, the first thing that happens is that sound waves enter the outer ear through a passage called "auditory canal" that reaches the eardrum.

The movement of the incoming sound waves causes the eardrum to vibrate and transmit these vibrations to three tiny bones of the middle ear.

Answer: i think its c

Explanation:

Lamarck's theory of evolution, also called as theory of inheritance of acquired traits was rejected because he suggested that the acquired characteristics which an organisms acquires through its life experiences are transferred to its next generation, which is not possible since acquired characters does not bring any change to an individuals set of genes.

Answer: Traits acquired during a lifetime are not passed through offspring. (C.)

Answer:

Super cluster

Explanation:

Final answer:

Clouds form when water vapor condenses into tiny droplets that aggregate around small particles or nuclei and then fall as precipitation.

Explanation:

Clouds form under specific conditions. The necessary conditions for clouds to form include:

These processes are part of the water cycle, where water evaporates from the ocean, condenses in the atmosphere, and eventually falls back to the Earth as precipitation.

A water pipe freezes and cracks on a cold night. (D)

There are three physical changes going on in this scenario:

1).  The air gets cold and dark at night.

2).  The water in the pipe freezes and expands.

3).  The pipe cracks.

There are no chemical changes in the description.

Answer:

A water pipe freezes and cracks on a cold night

Explanation:

A water pipe freezing and cracking is a physical change, not a chemical change. A physical change is a change in what the item looks like, feels like, or how the item has a different form. The water pipe freezing is an example of a physical change because the liquid water has turned to frozen water. The frozen water has expanded the pipe, causing it to crack. There are no chemical changes taking place in this scenario.

Mordancy.

kinetic energy and mass are dieectly proportional

Answer:

Kinetic energy and mass are directly proportional to each other

Explanation:

As we know by the formula of kinetic energy

[tex]KE = \frac{1}{2}mv^2[/tex]

now we know that

kinetic energy depends on the mass of object and it is product of mass and square of the speed.

Here we can say that if mass is doubled then kinetic energy also get double and if mass is decreased then kinetic energy also decreases

This type of relationship is known as direct relationship and here since it shows direct relationship so correct answer will be

Kinetic energy and mass are directly proportional to each other

Answer:

|F| = 2.09 × 10⁻⁸ assuming that the two ions are point charges.

Explanation:

What's the charge on each ion?

The symbol [tex]e[/tex] here stands for fundamental charge. Each electron carries a negative fundamental charge of -e. Each proton carry a positive fundamental charge of +e.

Molecules and atoms are neutral. They contain an equal number of electrons and protons. Remove one electron from a molecule or atom, and that particle will end up with more protons (which are positive) than electrons. That particle will carry a positive charge of +e become an ion (a cation to be precise.) Remove another electron and the ion will carry a charge of +2e.

For each ion [tex]q = +2 \;e = 2\times 1.60\times 10^{-19}\;\text{C} = 3.2\times 10^{-19}\;\text{C}[/tex].

What's the size of the electrostatic force between the two ions?

Consider Coulomb's Law for the electrostatic force [tex]F[/tex] between two point charges:

[tex]\displaystyle F = -\frac{k\cdot q_1\cdot q_2}{r^{2}}[/tex],

where

Make sure that all values are in SI units. Assume that the two ions are small enough that they act like point charges:

[tex]\displaystyle \begin{aligned}F &= -\frac{k\cdot q_1 \cdot q_2}{r^{2}}\\&=-\frac{8.99\times 10^{9}\cdot(3.2\times 10^{-19}) \cdot (3.2\times 10^{-19})}{(2.1\times 10^{-10})^{2}}\\ &= -2.09\times 10^{-8}\;\text{N}\end{aligned}[/tex].

The value of [tex]F[/tex] is negative, meaning that the two charges will repel each other because they are both positive. The question is asking for the magnitude of this force. Thus drop the sign in front of [tex]F[/tex] to obtain [tex]2.09\times 10^{-8}\;\text{N}[/tex], which is the magnitude of [tex]F[/tex].

Using Coulomb's Law, the magnitude of the force between two identical ions, each missing two electrons and separated by 2.1×10⁻¹⁰ m, is approximately 2.09 × 10⁻⁹ N.

To find the magnitude of the force between two identical ions, we use Coulomb's Law:

F = k × (q1 × q2) / r²

Here, k is the electrostatic constant, 8.99 × 10⁹ N⋅m²/C², q₁ and q₂ are the charges of the ions, and r is the separation distance between them.

Given:

First, calculate the charge of each ion:

q₁ = q₂ = 2 × 1.60 × 10⁻¹⁹ C = 3.20 × 10⁻¹⁹ C

Next, substitute the values into Coulomb's Law:

F = (8.99 × 10⁹ N⋅m²/C²) × [(3.20 × 10⁻¹⁹ C) × (3.20 × 10⁻¹⁹ C)] / (2.1 × 10⁻¹⁰ m)²

Simplify the calculation:

F = (8.99 × 10⁹) × (10.24 × 10⁻³⁸) / (4.41 × 10⁻²⁰)

F ≈ 2.09 × 10⁻⁹ N

Therefore, the magnitude of the force between the ions is approximately 2.09 × 10⁻⁹ N.

Answer:

216.0 units

Explanation:

The electrostatic force between two charged objects is given by:

[tex]F=k\frac{q_1 q_2}{r^2}[/tex]

where

k is the Coulomb's constant

q1 and q2 are the two charges

r is the distance between the charges

In this problem, the charge of object 2 is tripled, so

[tex]q_2 ' = 3 q_2[/tex]

Substituting into the original equation,

[tex]F'=k\frac{q_1 (3 q_2)}{r^2}=3 (k\frac{q_1 q_2}{r^2})=3 F[/tex]

So, the electrostatic force will be tripled.

Since the initial electrostatic force is

F = 72.0 units

the new force will be

[tex]F' = 3 F = 3(72.0 )=216.0[/tex]

Answer:

216

Explanation:

Answer:

10

Explanation:

The decibel or decibel, is a unit that relates two values ​​of sound pressure, and electrical power. the base unit is the bel, but given the amplitude but for practicality, a submultiple, the decibel, is used. It is a scalar expression .

Zero belios is the reference value used as a base, hence a bel is equivalent to 10 decibels and means that there is a power increase of 10 times over the reference value.

radiation since the suns rays are ultraviolet which is a form of radiation

Heat transfer from the Sun to the Moon is mostly through the process of Radiation.

Explanation:

In space, the heat is being transferred through the process of radiation. There is no atmosphere in the moon so it will get heat or cool by the process of conduction or convection.

In space, heat gets transferred by radiation which mainly takes place in the infrared band of electromagnetic waves. Radiation can transmit heat by the electromagnetic wave. It can take the heat transfer process in the vacuum.

Answer:

d

Explanation:

because i know

Answer:

Explanation:

D

A catalyst starts out with the reactants and winds up with the products. It does  not take any part of the reaction. It just lowers the activation energy (usually) making it easier to get from the left side of the equation to the right side.

B is the second best answer, and had you not chosen B and gotten wrong, I think I would have agreed with you.

Answer:

c

Explanation:

In a longitudinal wave, particle displacement is  parallel to the direction of wave motion.

(In a transverse wave, particle displacement is perpendicular to the direction of wave motion .)

Answer:

it is B

Explanation:

Answer:

B.

The form of energy that travels as electromagnetic waves.

Explanation:

Light energy, or electromagnetic field energy, is the form of energy that travels as electromagnetic waves. These waves do not need a medium through with to travel, so they are able to travel through the vacuum of outer space. Some types of light can be sensed by the human eye.

The best definition given is B: light energy is the form of energy that travels as electromagnetic waves, and this form of energy includes both wavelike behavior and particle-like characteristics as photons.

The best definition of light energy among the given options is B. The form of energy that travels as electromagnetic waves.

Light energy is a form of electromagnetic radiation that moves through a vacuum at a constant speed of approximately 3 × 108 meters per second. This radiation exhibits wavelike behavior, which includes a frequency (v) and a wavelength (λ), adhering to the equation c = λv, where c represents the speed of light. Additionally, light can be described as a stream of particles called photons, capturing the dual nature of electromagnetic radiation as both waves and particles, a concept referred to as wave-particle duality.

Light energy is best defined as the form of energy that travels as electromagnetic waves. Light is an example of a transverse wave, where the oscillations occur in the electric and magnetic fields perpendicular to the direction of motion. It exhibits both wave-like and particle-like behavior, known as wave-particle duality, and can be described as a stream of particles called photons, with energy related to the frequency or wavelength of the light.

Answer:

The slope

Explanation:

Answer:

Slope

Explanation:

It could result in it not being good for your joints, as well as in the long run but shouldn't cause problems when your a child. I hope this helps your question!

Electrical energy = Power x time.

30 minutes = 0.5 hours.

Electical energy = 1200W x 0.5 hours = 600W/hour = 0.6kWh

Answer:

0.1267658 pounds

0.0575kg

Explanation:

You were not specific at to which measurement you would have liked me to convert it to. I assume it would be in kilograms since that is the measurement used in science for weight. I have added pounds as well in case you were looking for an alternative weight.

The ossicles, a trio of tiny bones in the middle ear, receive sound vibrations from the eardrum and transfer them to the cochlea, which then converts them into electrical signals for the brain.

The part of the ear that receives the signal from the eardrum is the ossicles in the middle ear. Once the eardrum, or tympanic membrane, vibrates in response to sound waves, it transfers these vibrations to the ossicles. These three tiny bones - the malleus (hammer), incus (anvil), and stapes (stirrup) - act as a lever system, amplifying the sound vibrations and transmitting them to the cochlea in the inner ear. Inside the cochlea, the mechanical vibrations are converted into electrical signals by hair cells, and these signals are then transmitted to the brain via the auditory nerve.

Answer:

D. Down

Explanation:

The uranium-containing rods in the diagram should be moved down in order to slow down the fission reactions in its nuclear reactor.

Nuclear fission is the process of splitting the nucleus of heavier atoms to produce two or more atoms of lighter nucleus with the release of large amounts of energy.

In order to slow down the fission reactions in its nuclear reactor, neutron absorbers are introduced and the uranium-containing rods are removed from the nuclear reactor.

Therefore, the uranium-containing rods in the diagram should be moved down in order to slow down the fission reactions in its nuclear reactor.

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