when light crosses the boundary between media the characterisitc of the light that remains unchanged is

Answer: 60cm^3

Explanation:

Here we can use the relationship:

Density = mass/volume.

We know that density = 5g/cm^3 and mass = 50g, then we have:

5g/cm^3 = 50g/V

V = 50g/5g/cm^3 = 10cm^3

Then, when we introduce it in a cylinder with 50cm^3 of water, this is heavier than water (the density of the water is 1g/cm^3) it will sink, and the complete volume will be equal to the volume of the water plus the volume of the object:

Total Volume = 50cm^3 + 10cm^3 = 60cm^3

The de Broglie wavelength of the electron is 2.212 x 10-11 m.

The de Broglie wavelength is a concept in quantum mechanics which states that all matter has a wave-like nature, and can thus be described as a wave.

(a) The de Broglie wavelength (λ) of a particle is given by the equation: λ = h/p, where h is Planck's constant (6.626 x 10-34 J.s) and p is the momentum of the particle.
The momentum of an electron with a 1000-V potential drop is given by the equation p = eV/c,
where e is the electron charge (1.602 x 10-19 C) and c is the speed of light (2.998 x 108 m/s).
Therefore, the de Broglie wavelength of the electron is:
λ = h/(eV/c) = (6.626 x 10-34 J.s) / (1.602 x 10-19 C x 1000 V/2.998 x 108 m/s) = 2.212 x 10-11 m.

(b) X-rays are produced when high-energy electrons strike a solid.
The wavelength of the x-ray is inversely proportional to the energy of the electron.
The energy of the electron is equal to the potential drop, i.e. 1000 eV. Therefore,
the wavelength of the x-ray produced is: λ = hc/eV = (6.626 x 10-34 J.s x 2.998 x 108 m/s)/(1.602 x 10-19 C x 1000 eV) = 1.246 x 10-10 m.

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The following are the values:-

(a)Water content (W%)  = 13.99%

(b) Total unit weight (Υ\(_{t}\)) = 1778 kg/m³

(c) Dry unit weight (Y\(_{d}\)) = 1559.75 kg/m³

(d) Void ratio (e)  = 0.718

(e) Porosity (n) = 0.417

Volume of mold (V\(_{t}\)) = 0.4 m³

Dry mass of sand (W\(_{s}\)) = 623.9 kg

Wet mass of sand (W\(_{t}\)) = 711.2 kg

Specific Gravity (G\(_{s}\)) = 2.68

Water content (W%) = \(\frac{W_{w} }{W_{s} }\) × \(100\)

Water content (W%) = \(\frac{711.2 - 623.9}{623.9}\) × \(100\)

Water content (W%) = 13.99%

Total unit weight (Υ\(_{t}\)) = \(\frac{W_{t} }{V_{t} }=\frac{711.2}{0.4}\)

Total unit weight (Υ\(_{t}\)) = 1778 kg/m³

Dry unit weight (Y\(_{d}\)) = \(\frac{W_{s} }{V_{t} }=\frac{623.9}{0.4}\)

Dry unit weight (Y\(_{d}\)) = 1559.75 kg/m³

Solid unit weight (Y\(_{s}\)) = \(\frac{W_{s} }{V_{s} }\)

Or

G\(_{s}\) = \(\frac{Y_{s} }{Y_{w} }\) ⇒ Y\(_{s}\) = G\(_{s}\)Y\(_{w}\)

Y\(_{s}\) = 2.68 × \(\frac{10^{-3} }{(10^{-2})^{3} }\frac{kg}{m}\) = 2680 kg/m³

Now,

Void Ratio (e) = \(\frac{Y_{s} }{Yd}-1\)

Void Ratio (e) = \(\frac{2680}{1559.72}-1\)

Void Ratio (e) = 0.718

Porosity (n) = \(\frac{e}{1+e}\)

Porosity (n) = \(\frac{0.718}{1+0.718}\)

Porosity (n) = 0.417

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A laboratory sample of sand is formed inside a mold of 0.4 cubic meters. It took 711.2 kg of wet sand (dry mass of sand = 623.9 kg) to fill the mold. Assuming the specific gravity of the solid is 2.68, compute the:

(a)Water content (W%)  

(b) Total unit weight (Υ\(_{t}\))

(c) Dry unit weight (Y\(_{d}\))

(d) Void ratio (e)

(e) Porosity (n)

The answer is option (a)"decreases its energy" as doubling the momentum of a neutron leads to a decrease in its energy.

The de Broglie wavelength equation is given by λ = h/p, where λ is the wavelength of a particle, h is the Planck constant, and p is the momentum of the particle. This equation shows that the wavelength of a particle is inversely proportional to its momentum.

Therefore, if the momentum of a neutron is doubled, its wavelength will be halved (option (d) in the question).

However, the energy of a neutron is proportional to the square of its momentum, i.e., E = p\(^2/2m\), where E is the energy of the neutron, and m is its mass.

Therefore, if the momentum of a neutron is doubled, its energy will be quadrupled (not listed in the options).

Thus, option (a) "decreases its energy" is the correct answer.

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Explanation:

1.Seeds have endosperm which provides nourishment for a new plant, but spores do not have any stored food supplies.

hope it helpful

The carbon isotope was cobined with the proton to produce the nitrogen isotope hence it is a fusion reaction.

The term nuclear fusion refers to a kind of reaction in which two nuclei fuse together to give rise to a single nuclei with the evolution of energy.

We can see that the carbon isotope was cobined with the proton to produce the nitrogen isotope hence it is a fusion reaction.

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Answer:

A. Nuclear fusion

Explanation:

got it right, trust

The uniform acceleration of Tom is -0.7 m/s² (deceleration).

Initial speed of Tom, u = 10.5 m/s, Time taken by Tom, t = 15 s, Distance traveled by Tom, S = 15 m, Final speed of Tom and initial speed of Joe, v = 10.5 m/s

From the kinematic equation: S = ut + 0.5at² where a is the acceleration, we get:-

15 = (10.5)(15) + 0.5a(15)²-15

= 157.5 + 112.5a-172.5

a = 112.5a-1.53

So, the uniform acceleration of Tom is -0.7 m/s² (deceleration).

The uniform acceleration of Joe is 0 m/s².

Since Joe enters the exchange zone with the same velocity as that of Tom, he has zero acceleration. The baton is passed on to him at the same velocity, and he also leaves the exchange zone at the same velocity.

So, the uniform acceleration of Joe is 0 m/s².

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Answer:

0.16239316239316239316239

Explanation:

ang haba nang solve ko dito hehe

Answer:

60N to the right

Explanation:

They are in equilibrium so they must cancel out in magnitude and direction

To solve this we must be knowing each and every concept related to  fundamental force and its calculations. Therefore, 60N must be magnitude and towards right is the direction of the third force.

Nature is governed by four fundamental or universal forces. All stuff in the universe would disintegrate in the absence of these forces. Any pull or push that causes an item to change its physical condition is referred to as force (in terms of motion or deformity).

since total force acting on left side is of 60N. System is in equilibrium for that 60N of force should be there on the right side of the object. In equilibrium magnitude and direction of force gets cancels.

Therefore, 60N must be magnitude and towards right is the direction of the third force.

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RS is a composition of rotation and reflection in the Euclidean plane E². The precise description of RS depends on the specific properties of the rotation R and reflection S.

In general, if R and S have the same axis or line of symmetry, the composition RS results in a translation. If R and S have intersecting lines of symmetry, RS yields a glide reflection. If R and S have perpendicular lines of symmetry, RS produces a rotation.

It is important to consider special cases, such as parallel lines of symmetry, coinciding axes, or perpendicular lines of reflection, as they may lead to different outcomes. The classification of isometries in E² involves understanding how rotations and reflections combine to create different transformations in the plane.

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Standard candles are astrophysical objects whose brightness may be measured and which serve as a candle in the blackness of space.  Astronomers because their magnitude can be used to calculate distance.

Supernovae, which explode into space, provide the most accurate measurements of vast cosmic distances. Type Ia supernovae are the most accurate of these as "standard candles" for calculating cosmic distances when witnessed at near-infrared wavelengths.

Cepheid variables, a class of variable stars, were the first candles used by astronomers to gauge distances inside and beyond our galaxy. Cosmologists have been using Type Ia supernovae as standard candles more lately.

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Answer:

v = 3.24 m/s

Explanation:

Since we don't have time, we can use the formula;

(Final distance - initial distance)/time = (initial velocity + final velocity)/2

Thus;

(x_f - x_i)/t = ½(v_xi + v_xf)

We are given;

x_i = 0 m

x_f = 5 m

v_xi = 0 m/s

v_xf = 5 m/s

Thus, plugging in the relevant values;

(5 - 0)/t = (0 + 5)/2

5/t = 5/2

t = 2 s

Using Newton's first law of motion, we can find the acceleration.

v = u + at

Applying to this question;

5 = 0 + a(2)

5 = 2a

a = 5/2

a = 2.5 m/s²

To get the speed, in m/s, of the block when it had traveled only 2.1 m from the top, we will use the formula;

v² = u² + 2as

v² = 0² + 2(2.5 × 2.1)

v² = 10.5

v = √10.5

v = 3.24 m/s

The largest hydroelectric dam in the world is the Three Gorges Dam, located on the Yangtze River in China.

The Yangtze River is the longest river in Asia and the third-longest river in the world, with a total length of approximately 6,300 km. The Yangtze River Basin is a vital economic and cultural region in China, supporting more than 400 million people and serving as a major transportation artery.

The Three Gorges Dam was built to provide hydroelectric power, improve river navigation, and control flooding in the Yangtze River Basin. The dam is approximately 2.3 km long and 185 meters tall, with a reservoir capacity of over 39 billion cubic meters of water.

The Three Gorges Dam is an impressive engineering feat and has significant economic and environmental impacts on the region. The dam provides clean and renewable energy, supports increased river transportation, and helps prevent devastating floods that have historically occurred in the Yangtze River Basin.

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Complete question is:

Largest hydroelectric dam in the world is located on one of the world’s longest rivers. Where is the dam located?

Answer: Weak nuclear forces are involved when certain types of atoms break down. Strong nuclear forces are responsible for holding atoms' nucleus together.

The work done on the system is 6 Btu and the mass of the system is 100 lbm. We are to determine the change in elevation of the system in ft and in.

Potential energy (PE) can be given as:mghWhere,m = mass of the system,g = acceleration due to gravity,h = height or elevationLet Δh be the change in elevation of the system.Then the work done in raising the system to a height Δh is given as:W = ΔPE = mgh1 Btu = 778 ft lb6 Btu = 6 × 778 = 4668 ft lb

Mgh = 4668 ft lb ⇒ 100 × 32.2 × h = 4668⇒ h = 14.49 ftTherefore, the change in elevation of the system is 14.49 ft.The conversion of 14.49 ft to m is given as follows:1 m = 3.281 ft14.49 ft = (14.49 / 3.281) m ≈ 4.415 mTherefore, the change in elevation of the system is 14.49 ft or 4.415 m.

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The conditions that must be satisfied for momentum to be conserved in a system are; The total external force acting on a system must be zero. In other words, the net force on the system must be zero.

If there is no net force on the system, the momentum of the system will remain constant with time.The mass of the system must remain constant with time. If the mass of the system is changing with time, the momentum of the system will also change with time. Therefore, it is essential to keep the mass of the system constant.

The collision must be elastic. In an elastic collision, the total kinetic energy of the system is conserved, and the momentum of the system is conserved. In other words, the system behaves as if there were no external forces acting on it. If the collision is not elastic, the total kinetic energy of the system will not be conserved. Instead, some of the kinetic energy will be converted into other forms of energy, such as thermal energy or sound energy.If the above three conditions are satisfied, the momentum of the system will be conserved.

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SAS detects the end of a step through the use of run and quit statements, as well as the beginning of another step. These markers are essential in SAS programming to organize and execute complex programs effectively.

When SAS encounters a run statement, it signals the end of a step and begins to execute the step. The run statement is typically used to signal the end of a data or proc step in SAS code. Similarly, when a quit statement is encountered, it signals the end of the entire program and stops the execution of the current step. This is often used to exit from a loop or a conditional statement in the SAS program.

Finally, the beginning of another step marks the end of the current step. In SAS, a step can be defined as a series of statements that are executed together to accomplish a specific task. When SAS encounters the beginning of another step, it signals the end of the current step and begins to execute the next step. This helps to break down large SAS programs into smaller, more manageable steps.

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Answer:

it has both magnitude and direction.

Explanation:

The precursors for the de novo synthesis of pyrimidines are:

Carbamoyl phosphate and aspartate.

Higher eukaryotes' de novo pyrimidine nucleotide biosynthesis produces crucial precursors for a variety of growth-related processes. The fuel for the synthesis of RNA, DNA, phospholipids, UDP sugars, and glycogen is composed of the nucleotides uracil and cytosine, which are built from ATP, bicarbonate, and glutamine.

In contrast to recycling after partial degradation, de novo synthesis refers to the creation of complex molecules from simple molecules like sugars or amino acids. For instance, since they may be made from tiny precursor molecules like for mate and aspartate, nucleotides don't need to be included in the diet.

An aromatic heterocyclic organic compound like pyridine is pyrimidine. The nitrogen atoms are located at positions 1 and 3 in the ring, making it one of the three diazines.

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If you stare at a red object and immediately look at a white area afterward, you will see an afterimage that is the same size and shape, but it is blue-green, or cyan, in color. '

This is known as the opponent process theory

The opponent process theory of color vision says that color is processed in pairs (red-green, yellow-blue, and black-white.)

It means that Light that stimulates one half of the pair inhibits the other half.

In conclusion, this opponent process is thought to be responsible for our perception of color and explains why people experience afterimages.

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We are given two vectors and we are asked to determine the direction of their sum. To do that we will rewrite them on coordinates form. For vector A, since it is a horizontal vector it only has an x-coordinate equivalent to its magnitude, like this:

For vector B we will use the following formula:

Replacing the values:

Solving the operations

Step 1: The power generation potential of the water jet is approximately X kW.

Step 2:

To determine the power generation potential of the water jet, we need to calculate the kinetic energy of the jet and then convert it to power. The kinetic energy (KE) of an object can be calculated using the formula \(KE = 0.5 * m * v^2\), where m is the mass of the object and v is its velocity.

Given that the flow rate of the water jet is 118.25 kg/s and the velocity is 55.47 m/s, we can calculate the mass of the water jet using the formula m = flow rate / velocity. Substituting the given values, we get \(m = 118.25 kg/s / 55.47 m/s ≈ 2.13 kg.\)

Now, we can calculate the kinetic energy of the water jet using the formula\(KE = 0.5 * 2.13 kg * (55.47 m/s)^2 ≈ 3250.7 J.\)

To convert this kinetic energy into power, we divide it by the time it takes for the jet to strike the buckets on the wheel. Since the time is not given, we cannot provide an exact power value. However, assuming a reasonable time interval, let's say 1 second, we can convert the kinetic energy to power by dividing it by the time interval. Thus, the power generation potential would be approximately \(3250.7 J / 1 s = 3250.7 W ≈ 3.25 kW.\)

Therefore, the power generation potential of the water jet is approximately 3.25 kW.

The power generation potential of the water jet depends on its kinetic energy, which is determined by its mass and velocity. By calculating the mass of the water jet using the flow rate and velocity, we can then calculate its kinetic energy. Finally, by dividing the kinetic energy by the time interval, we can determine the power generation potential in kilowatts.

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The temperature decreases 5°C in one hour and then decreases another 3°C in the next hour fits the description of weather.

This is defined as the atmospheric condition of a place within a short period of time and is influenced by a lot of factors in the environment.

In this scenario, the temperature was taken every hour which is a short period of time and is thereby denoted as weather.

On the other hand, climate is the condition of a place over a long period of time which is usually up to a year which is why weather fits the definition provided.

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Answer:

1. W = 900 J

2. a = -450000 m/s²

Explanation:

2.

First, we calculate the deceleration of the bullet by using 3rd equation of motion:

\(2as = V_{f}^{2} - V_{i}^{2}\\\)

where,

a = deceleration = ?

s = distance traveled = 0.1 m

Vf = Final Speed = 0 m/s (it eventually stops)

Vi = Initial Speed = 300 m/s

Therefore,

\(2a(0.1\ m) = (0\ m/s)^{2} - (300\ m/s)^{2}\\a = \frac{-90000\ m^{2}/s^{2}}{0.2\ m}\\\\\)

a = -450000 m/s² (negative sign shows deceleration)

1.

Now, we calculate the force using Newton's Second Law:

\(F = ma\\F = (0.02\ kg)(-450000\ m/s^{2})\\F = - 9000\ N\)

Negative sign shows decelerating force.

For work done:

\(Work\ Done = W = Fs\\W = (9000 N)(0.1\ m)\)

W = 900 J

Answer:

Surround the area of fire with water so the fire cant spread.  And after, pour water on the fire.  Always surround the fire first to stop it from spreading.  When handling fire there are no specific "safe" ways but this is probably the best way to go orby fire estinguisher which is probably the easiest if you have one nearby which usually you should or do have.

I hope I helped.  Pls mark brianliest if it helps.  Bye, take care:)

Answer:

the answer would be c sry if it is wrong

Answer:

It reveals that light is a wave

Explanation:

Diffraction is the property of a wave in which there is a bending of the wave about the corners of an obstacle or aperture into the geometrical shadow of the obstacle or aperture.

This simply implies that a wave bends or spreads out when it passes through openings. Since the light diffracts through small slits and diffraction has been shown to occur in water waves and sound waves, this property of diffraction can only be characteristic of a wave and thus, this evidence reveals that light is a wave.

Answer:

It shows that light can travel in different wavelengths.

Explanation:

Light is similar to a wave in the way that it travels in a straight line, but when it is passing through the slits, it diffracts due to this difference. Therefore, light refracts in the same way as a wave would, and it is a mode of transferring energy. The light travels in a way similar to a wave

Answer:

Applications of Gravitational Force:

Answer:

Explanation:

In order for one to carry something, they need to be exerting a force that is equal to the weight of the object. For Antonio therefore to hold the 1-pound bag, he needs to apply a 1-pound force.

Pounds measure the mass of an object. On his left hand Antonio has 1 pound and on the right he has 2. He is therefore carrying more mass on his right hand than on his left.