Which form of radiation is used to directly INCREASE the temperature of water in a nuclear reactor? A) neutrons Eliminate B) beta particles C) alpha particles D) gamma radiation

The correct answer is

Electric charges produce electric fields.

In fact, electric fields are produced by electric charges. For instance, the electric field produced by a single-point charge is radial, and its intensity decreases as the inverse of the square of the distance from the charge, according to:

[tex] E=k\frac{q}{r^2} [/tex]

where k is the Coulomb's constant, q is the magnitude of the charge and r is the distance from the charge. If the charge is positive, the electric field points away from the charge; if the charge is negative, the electric field points toward the charge.

The relationship between frequency, wavelength, and speed holds for light because each type of electromagnetic wave travels at the same speed (the speed of light) in a vacuum. This leads to a constant relationship between these parameters for all light waves, described by the equation: speed of light = frequency X wavelength.

The relationship between frequency, wavelength, and speed holds for light waves because all forms of electromagnetic radiation travel at a single speed in a vacuum. This speed is known as the speed of light, typically represented by the symbol c and is approximately 299,792 kilometers per second. These properties of light waves are commonly captured in the formula c = λν, where c is the speed of light, λ (lambda) is the wavelength, and ν (nu) is the frequency. This means that the frequency of a light wave times its wavelength always equals the speed of light. Therefore, the relationship between frequency, wavelength, and speed holds for light because these factors are intrinsically linked, irrespective of the type of electromagnetic wave.

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The most massive trunk you will be able to move is approximately [tex]\( 69.2 \, \text{kg} \)[/tex]. So, the closest option is 67 kg.

To find the maximum mass of the trunk you can move, we need to consider the maximum force of static friction that can be exerted by the floor on the trunk. The maximum force of static friction[tex](\( F_{\text{friction}} \))[/tex] can be calculated using the formula:

[tex]\[ F_{\text{friction}} = \mu_s \times N \][/tex]

Where:

-[tex]\( \mu_s \)[/tex] is the coefficient of static friction,

- [tex]\( N \)[/tex] is the normal force exerted by the floor on the trunk.

The normal force[tex](\( N \))[/tex] can be calculated as the vertical component of the force you exert on the trunk:

[tex]\[ N = F_{\text{vertical}} = F \times \cos(\theta) \][/tex]

Where:

-  F  is the force you exert on the trunk (750 N in this case),

- [tex]\( \theta \)\\[/tex] is the angle of the force with the horizontal (25° in this case).

Substituting the given values:

[tex]\[ N = 750 \, \text{N} \times \cos(25^\circ) \]\[ N \approx 750 \, \text{N} \times 0.906 \]\[ N \approx 679.5 \, \text{N} \][/tex]

Now, we can calculate the maximum mass m  of the trunk using the formula:

[tex]\[ F_{\text{friction}} = m \times g \][/tex]

Where:

- m  is the mass of the trunk,

-  g  is the acceleration due to gravity (approximately  [tex]\( 9.81 \, \text{m/s}^2 \)).[/tex]

Substituting the given values:

[tex]\[ 679.5 \, \text{N} = m \times 9.81 \, \text{m/s}^2 \]\[ m = \frac{679.5 \, \text{N}}{9.81 \, \text{m/s}^2} \]\[ m \approx 69.2 \, \text{kg} \][/tex]

Therefore, the most massive trunk you will be able to move is approximately [tex]\( 69.2 \, \text{kg} \)[/tex]. So, the closest option is 67 kg.

Answer:

C.

Explanation:

I did this assignment

Final answer:

The wavelength of a 13.0 kHz VLF radio wave in air is calculated using the formula λ = v / f, with the speed of light as the speed. This yields a wavelength of about 23,077 meters, or 23 kilometers, illustrating the long-distance propagation capabilities of VLF radio waves.

Explanation:

The question pertains to calculating the wavelength of a 13.0 kHz VLF (Very Low Frequency) radio wave in air. The formula that links the wavelength (λ), frequency (f), and speed (v) of a wave is λ = v / f. For electromagnetic waves in air, the speed can be approximated to the speed of light, which is roughly 3×108 meters per second (m/s).

Using this formula:λ = 3×108 m/s / 13,000 Hz = approximately 23,077 meters.

Therefore, the wavelength of a 13.0 kHz VLF radio wave in air is about 23 kilometers. This large wavelength is characteristic of VLF radio waves, allowing them to propagate over long distances and curve around the Earth's surface, making them useful for communication over the horizon without the need for satellite or cable transmission.

Answer: Option (b) is the correct answer.

Explanation:

The energy  obtained by an object because of their motion is known as kinetic energy.

Hence, when particles of an object is moving rapidly from one place to another then it means the molecules have high kinetic energy.

Therefore, in a hot chocolate molecules will have high kinetic energy due to increase in temperature. Whereas particles of juice has more kinetic energy than milk. On the other hand, molecules of water will have least kinetic energy as only then it is existing in liquid state otherwise it would have evaporated.

Thus, we can conclude that drinks in order of decreasing kinetic energy are as follows.

                    hot chocolate > juice > milk > water

The graph shows a marble rolling down a curve from position 1 to position 5. In position 1 the potential energy of the marble is greatest.

Mechanical energy is the combination of all the energy in motion represented by total kinetic energy and the total stored energy in the system which is represented by total potential energy.

The expression for total mechanical energy is as follows

ME= PE+KE

Where ME is the mechanical energy

PE is the total potential energy

KE is the total kinetic energy

As total mechanical energy is the sum of all the kinetic as well as potential energy stored in the system. At the highest point of position 1, the potential energy of the marble ball would be greatest.

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Answer:

She could disagree with Shari because the pendulum converts gravitational potential energy into kinetic energy, then back into gravitational potential energy.

Explanation:

The energy of the pendulum is constantly converted from gravitational potential to kinetic, and back.

In fact:

- the gravitational potential energy of the pendulum is given by:

[tex]U=mgh[/tex]

where m is the mass of the pendulum, g is the gravitational acceleration, and h is the height of the pendulum above the ground

- The kinetic energy of the pendulum is given by:

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

where v is the speed of the pendulum.

Therefore, when it is at a higher position, the pendulum has a greater potential energy, while when it is at a lower position, the pendulum has a greater kinetic energy (because its speed is higher).

In this example:

- when the pendulum swings from B to C, part of its gravitational potential energy is converted into kinetic energy (because the height decreases but the speed increases), and when the pendulum goes from C to D, the kinetic energy is converted back into gravitational potential energy (because the height increases and the speed decreases)

The statement which best describes the electron in the given illustration is the electrons are negatively charged particles located outside the nucleus.

Electron is the the elementary particle of atom. The electron is negatively charged element of a atom, with the magnitude equal to the [tex]1.6\times10^{-19}[/tex] C. This charge of electron is equal and opposite of the charge of proton.

The neutron (neural partial of atom) and the proton(positively charged particle of atom) is located inside the nuclease.

Unlike the neutron and proton, the electron located outside of the nucleus as shown in the image given in the problem.

Lets check all the option-

Thus, the statement which best describes the electron in the given illustration is the electrons are negatively charged particles located outside the nucleus. Therefore, the option A is the correct option.

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Answer:I got it right on quiz

Explanation:

In physics, two or more velocities are usually added by using vector addition, adding together their horizontal and vertical components. For example, if one object moves east at 3 m/s and another north at 4 m/s, you would add these using a graph and the Pythagorean theorem.

In physics, two or more velocities are typically added by methods of vector addition. To add velocities, you first decide on a common reference frame. Then, you perform vector addition, which includes adding the x-components (horizontal velocities) together to get the total x-component, and adding the y-components (vertical velocities) together to get the total y-component.

For instance, if one object is moving at a velocity of 3 m/s to the east, and another object is moving at a velocity of 4 m/s to the north, you would add these velocities together by drawing them as arrows on a graph, and then using the Pythagorean theorem to find their resultant velocity. This is known as adding velocities, and it's crucial in understanding the concepts of motion and direction in physics.

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Answer:

Comet's orbit.

Explanation:

Edmond Halley and Alexis Clairaut were one of those Newtonian who helped to validate the results of Isaac Newton.

They correctly explained Comet' motion and how planets gravitational force affect them.

But using Newton's idea of Mathematics and Gravity, they have made two important discoveries:

1. Why celestial bodies have different colors.

2. They were able to find the Comet's orbit and prediction(year) of its return.

The correct option is (e). A longitudinal wave has all of the properties like speed, frequency, wavelength & amplitude.

Longitudinal waves are characterized by their unique properties, which include speed (a), frequency (b), wavelength (c), and amplitude (d). Here's a brief explanation of each property:

a. Speed (a): This is the rate at which the wave propagates through a medium. It is typically measured in meters per second (m/s) and depends on the properties of the medium, such as its density and elasticity.

b. Frequency (b): This is the number of complete cycles of the wave that pass a given point per unit time. It is measured in hertz (Hz) and is related to the pitch or tone of a sound wave, which is a type of longitudinal wave.

c. Wavelength (c): This is the distance between two consecutive points in the wave that are in phase, such as two adjacent peaks or two adjacent troughs. It is usually denoted by the Greek letter lambda [tex]\lambda[/tex] and is related to the frequency and speed of the wave by the equation [tex]\( v = f \lambda \)[/tex], where v is the speed, f is the frequency, and [tex]\( \lambda \)[/tex] is the wavelength.

d. Amplitude (d): This is the maximum displacement of a point on the wave from its rest position. It determines the loudness or intensity of a sound wave and is related to the energy carried by the wave.

The efficiency of the lever is 93%, calculated by comparing the output work to the input work. 7 joules of the input work are lost as heat.

The efficiency of the lever is determined by comparing the output work to the input work. In this case, the efficiency can be calculated using the formula:

Efficiency = (Output Work / Input Work) X 100%

Substituting the given values:

Efficiency = (93 J / 100 J) X 100%

Efficiency = 93%

The amount of work lost as heat is the difference between the input work and the output work, which can be calculated as:

Heat lost = Input Work - Output Work

Heat lost = 100 J - 93 J

Heat lost = 7 J

Therefore, 7 joules of the work input are lost as heat.

When there is or in-between two words, the tense is dependent upon the word that comes after or. In other words, the word that is closest to the verb will decide the form of the verb.

Since satellites is a plural form of a satellite, the verb that follows satellites should also be plural. The plural verb in the given options is prove.

As far as the second blank is concerned, you can see Venus is a proper noun; therefore, the verb that comes after Venus should be a singular verb, which in this case is has.

So the complete sentence would become the following:

Telescopes and satellites prove that neither Mercury nor Venus has a moon.

Correct pair: prove:has

The most massive star is likely to appear the brightest. Hence option B is correct.

The sun may be the most massive object in the solar system, making up 99.8% of the system's total mass, yet compared to other stars, it is actually rather typical. Of all known stars, roughly half are more massive and half are less massive. R136a1, a star that is more than 300 times as massive as the sun, is the most massive star known to exist in the sky. Yet it's not the only star dwarfing the main star of the Earth.

The Tarantula Nebula contains RMC 136a1, more often known as R136a1, which is located around 163,000 light-years from Earth. The Great Magellanic Cloud, one of the Milky Way's satellite galaxies, contains this huge star, which is located outside of our galaxy.

In 1960, astronomers at the Radcliffe Observatory in South Africa discovered the RMC 136 star cluster. More than 200 incredibly brilliant stars were discovered in the cluster when the Hubble Space Telescope analysed the system; the most massive of these stars was known as RMC 136a1.

Hence option B is correct.

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