What quantity is represented by the mass number minus the atomic number?.

Light rays bend towards the normal because they slow down when moving from a rarer medium to a denser medium.

The reason behind the refraction of rays of light towards normal is that because slow down when moving from a rarer medium to a denser medium.

If the light rays enter any substance with a higher refractive index (which includes air into glass) then it will slow down. The light always bends towards the ordinary line. If mild travel enters into a substance with a lower refractive index (which includes from water into the air) then it will speed up. Therefore the ray of light always refracted towards the normal.

When the light rays enter from the air into a denser medium like water or glass then the ray of light will refract towards the normal. When light travels from a denser medium into the air, it will refract away from the normal.

So we can conclude that light rays slow down when moving from a rarer medium to a denser medium.

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The critical angle for the interface between TiO2 and air is approximately 41.8 degrees.

The critical angle for an interface between two media is the angle of incidence of a ray of light at which the refracted ray travels along the interface, making an angle of 90 degrees with the normal to the interface.

For the interface between titanium dioxide (TiO2) and air, the critical angle can be calculated using Snell's law, which relates the angle of incidence to the angle of refraction:

n1sin(theta1) = n2sin(theta2)

where n1 and n2 are the refractive indices of the two media, and theta1 and theta2 are the angles of incidence and refraction, respectively.

The refractive index of TiO2 is about 2.55, while the refractive index of air is approximately 1. The critical angle can be found by setting the angle of refraction to 90 degrees, which gives:

sin(theta_c) = n2/n1 = 1/2.55

Taking the inverse sine of both sides of the equation, we get:

theta_c = sin^(-1)(1/2.55) ≈ 41.8 degrees

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Earth's atmosphere is completely opaque to certain types of electromagnetic radiation in the ultraviolet, X-ray, and gamma ray regions of the spectrum. The ozone layer in the stratosphere absorbs most of the ultraviolet radiation from the Sun, while X-rays and gamma rays are completely blocked by the Earth's atmosphere.

The Earth's atmosphere is made up of various layers that contain different gases, water vapor, and other particles. These layers interact with electromagnetic radiation in different ways depending on the frequency or wavelength of the radiation. There are certain frequencies of electromagnetic radiation that cannot penetrate the Earth's atmosphere and are completely absorbed, reflected, or scattered back into space. The types of electromagnetic radiation that are completely opaque to the Earth's atmosphere are mainly in the ultraviolet, X-ray, and gamma ray regions of the spectrum.Ultraviolet radiation has wavelengths between 10 and 400 nanometers (nm) and is known to cause sunburns, skin cancer, and other harmful effects on living organisms. The Earth's ozone layer, which is found in the stratosphere layer between 10 and 50 km above the Earth's surface, absorbs most of the ultraviolet radiation from the Sun. However, the ozone layer is not completely effective in blocking all of the ultraviolet radiation, and some of it still reaches the Earth's surface. This is why it is important to wear sunscreen and protective clothing when spending time outdoors, especially during peak sunlight hours.X-rays and gamma rays have even shorter wavelengths than ultraviolet radiation and are highly energetic forms of electromagnetic radiation. They are produced by extremely hot and dense objects such as black holes, neutron stars, and supernova explosions. X-rays and gamma rays are completely absorbed by the Earth's atmosphere and do not reach the surface. This is fortunate for living organisms because these forms of radiation can cause severe damage to cells and tissues, leading to radiation sickness, cancer, and other health problems.

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Answer:

distance is how far away something has travelled from another object, while displacement is how far something is from the other object. Displacement is a vector quantity, unlike distance.

The force of gravitational attraction is reduced by a factor of 4 when the separation distance between two objects is doubled (increased by a factor of 2).

The gravitational force, which is what pushes mass-containing objects toward one another. We frequently consider the pull of gravity from the Earth. Your body is kept on the ground by this force. However, all mass-bearing objects are pulled toward one another by gravity.

Greater gravitational forces will be used to attract heavier things since the gravitational force is directly proportional to the mass of both interacting objects. Therefore, the gravitational attraction between two objects grows as their respective masses do as well. The force of gravity between two objects is equal to their respective masses multiplied by two. If one of the items triples in mass, the gravitational pull between them will also triple.

The radius of a circle is the separation between its center and circumference. Always, the diameter is twice the radius. As a result, the formula is created by multiplying the diameter by two.

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Answer:

300 coulombs.

Explanation:

We know that:

Current(A) = quantity of charge (coulomb) / time(secs)

But we are looking for the charge. So we do this:

Quantity of charge = Current (A) × Time (secs)

2 mins = (60 × 2) secs = 120 secs

2.5A × 120 secs = 300 coulombs

Two factors. The independent variable is the light colour and the dependent variable is the mood. The ambient colour is not a factor as it is being controlled in each room.

A within-subjects experiment is used to assess the effect of light colour on mood. The experiment has a single light bulb with three different ambient colour schemes. The experiment features three rooms each with a different light bulb, there are factors in this experiment.
In this within-subjects experiment designed to assess the effect of light colour on mood, there is 1 factor being manipulated, which is the ambient colour of the light bulb.

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A resume is usually read for less than C. 30 seconds by an employer.

A resume is a document that presents your educational qualifications, experiences, and achievements that have taken place throughout your academic career and professional life. This document is crucial in a job application process, and it plays a key role in determining whether an employer is interested in interviewing you or not. Thus, it is necessary to write a well-written and a concise resume that catches the employer's attention in less than 30 seconds. This is because most employers go through many job applications and they do not have much time to read every resume thoroughly.

Therefore, it is essential to organize and format the resume in such a way that the key information and skills stand out. In addition, it is necessary to customize the resume to fit the job requirements of each job application, this can be done by researching the company and the job position to determine what skills and qualifications the employer is looking for. In conclusion, it is crucial to ensure that the resume is well-written, organized, and customized to fit the employer's requirements. So the correct answer is C. 30.

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Answer:

A

Explanation:

Dropping the magnet its weaknging the structure

The final velocity of the two-vehicle mass is 2.42m/s.

Momentum is defined as the product of mass and velocity of an object which is a vector quantity, which has a magnitude and a direction. If m is the mass of an object and v is its velocity, then p is the momentum of the object: \(\mathbf{p} = m \mathbf{v}.\)

For above given information,

\(m_1= 1400kg\\m_2= 6400kg\\v_1_i=-13.5 m/s\\v_2_i= 0m/s\)

Formula for this is:

\(m_1.v_1_i+m_2.v_2_i= (m_1+m_2)v_f\)

(1400.-13.5)+ (6400.0) = (1400+6400).\(v_f\)

-18900=7800.\(v_f\)

-18900/7800=\(v_f\)

\(v_f= 2.42m/s\)

Thus, the final velocity of the two-vehicle mass is 2.42m/s.

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The concentration of the solution with an absorbance of 0.71 is approximately 2.83.

To find the concentration of a solution using the Beer's Law equation, we need to rearrange the equation and solve for x (the concentration). The Beer's Law equation is given as:

y = εxc

Where:
- y is the absorbance
- ε is the molar absorptivity (also known as the molar absorptivity coefficient)
- x is the concentration of the solution
- c is the path length of the cuvette (usually in centimeters)

In your case, the Beer's Law equation is given as:

y = 1.4684x^0.14

To find the concentration (x) of a solution with an absorbance (y) of 0.71, we substitute the values into the equation:

0.71 = 1.4684x^0.14

To solve for x, we need to isolate it on one side of the equation. First, we can raise both sides of the equation to the power of (1/0.14):

(0.71)^(1/0.14) = (1.4684x^0.14)^(1/0.14)

This simplifies to:

4.166 = 1.4684x

Finally, divide both sides of the equation by 1.4684 to solve for x:

x = 4.166 / 1.4684

x ≈ 2.83

Therefore, the concentration of the solution with an absorbance of 0.71 is approximately 2.83.

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Answer:

learning about the different functions of the body and therefore they have enough practice in order to have a clean and safe operation

Explanation:

Answer:

1.) A

2.) B

4.) A

17.) B

Explanation:

Im sure tama ako nasagot kona

to ehh

Answer:

f/4

Explanation:

Explanation: Gravitational force between two objects varies directly as their masses and inversely as the square of the distance between them. So, when the masses of both objects are halved without changing the distance, the gravitational force between them would become one-fourth of the original value

Answer:

Dude this is based on some egg you have

Explanation:

The harmonic frequencies would be 880 Hz, 1320 Hz, 1760 Hz, and 2200 Hz if the fundamental frequency was 440 Hz.

The sound waves have a wavelength of 2m and travel at a speed of 440 m/s. Hence, the sound wave has a 2 m wavelength.

340 m/s x 340 Hz x 1 m = 340 m/s, the formula for wavelength. A 34,000 hertz wave has a wavelength of 340 m/s, and its frequency is 0.01 m, or 1 cm.

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The force required to tip the cube is equal to the coefficient of static friction times the weight of the cube.

fx=μs * 87 kg * 9.8 m/s^2

Generally, The cube will start to tip when the net torque about the point of contact between the cube and the floor is equal to zero. The torque is given by:

torque = force x distance from axis of rotation

The distance from the axis of rotation is half the edge length of the cube (0.475m), and the force is the force applied by the person (). Therefore, the torque is:

torque = fx x 0.475

For the cube to tip, the torque due to the person's force must be greater than the maximum torque the friction can provide, which is the friction force times the distance from the axis of rotation.

The maximum torque provided by friction is:

friction torque = friction force x 0.475

Since the friction force is equal to the normal force (mg) multiplied by the coefficient of static friction (μs), the maximum torque provided by friction is:

friction torque = μs * mg * 0.475

where m is the mass of the cube, g is the acceleration due to gravity and μs is the coefficient of static friction between the cube and the floor.

So, we can find the force needed to tip the cube by equating the torque due to the force with that of the friction torque.

Fx*0.475 = μs * m * g * 0.475

Fx= μs * m * g

Fx= μs * 87 kg * 9.8 m/s^2

Note: The coefficient of static friction (μs) is a dimensionless quantity between 0 and 1, it varies depending on the surfaces in contact.

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The 1.12 seconds to catch the potted plant after it drops from the ledge.

To determine the time it takes for the potted plant to fall from a height of 6.3 m, we can use the equation of motion for free fall:

h = (1/2) * g * t^2

where:

- h is the height (6.3 m in this case)

- g is the acceleration due to gravity (approximately 9.8 m/s^2)

- t is the time

Rearranging the equation to solve for time:

t = sqrt((2 * h) / g)

Substituting the given values:

t = sqrt((2 * 6.3 m) / 9.8 m/s^2)

t ≈ 1.12 seconds

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Circumpolar stars, such as those in the Big and Little Dippers in the northern hemisphere, are stars that completely circle a celestial pole. They don't set; they just hang out in the night sky.

The stars known as circumpolar stars never set below the horizon. (The horizon is the line that marks the boundary between the sky and the ground.) While circumpolar stars appear to revolve around the South Star or Sigma Octantis in the Southern Hemisphere, the North Star or Polaris, in the Northern Hemisphere. A circumpolar star is one that appears to be close to one of the celestial poles and never sets below the horizon when seen from a particular latitude on Earth. The celestial equator is not far from these stars.Their name derives from the celestial pole around which they revolve. The northern celestial pole star in the northern hemisphere is Polaris. These stars can be found close to the celestial pole.

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The red light is the least refracted by the prism.

Each beam of light with a particular wavelength is slowed differently by the glass. Since violet light has a shorter prism wavelength, it is brake more than the longer wavelengths of red light. accordingly, violet light is bent the most while red light is bent prism the least. Prism on dispersion, the light rays with longer wavelengths bend less than ones with shorter wavelengths. Since red has the longest wavelength, it bends the least. prism Among the 7 constituent colors of light, violet light has the least wavelength and hence it deviates the most, and red light having the largest wavelength deviates the least. Hence, prism the required order is violet, indigo, blue, green, yellow, orange, and red.

So we can conclude that in a prism, the red light is less refracted.

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Answer:

scientists will use absolute dating to find how old a fossil exactly is.

Answer:

So the answer is scientists will use absolute dating to actually find how old a fossil exactly is. Hope it helps!

Answer:

the mass of the truck is 2 kg.

Explanation:

Given;

mass of the car, m₁ = 3 kg

initial velocity of the car, u₁ = 40 m/s

initial velocity of the truck, u₂ = 60 m/s

let the mass of the truck = m₂

Apply the principle of conservation of linear momemtum;

m₁u₁ = m₂u₂

m₂ = (m₁u₁) / u₂

m₂ = (3 x 40) / (60)

m₂ = 2 kg

Therefore, the mass of the truck is 2 kg.

The current flowing in the circuit is 4 A.

The current flowing in the circuit is the rate of flow of charges per second.

The magnitude of the current flowing in the circuit can be calculated by applying Ohm's law as shown below.

V = IR

where;

The magnitude of the current is calculated as;

I = V/ R

I = 16 V / 4 ohms

I = 4 A

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The mass and energy of the wood before burning would be equal to the energy and matter of the ash, soot, heat and light after burning.

The law of conservation of energy states that energy can neither be created nor destroyed but can be transformed from one form to another.

While burning of wood, the chemical energy in the wood is released as heat because of the chemical reaction of wood and oxygen.

This type of chemical reaction is called combustion and it requires oxygen. Combustion converts the stored chemical energy in the wood into heat and light energy.

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Answer:

Efficiency can be increase by using rollers in conjunction with the inclined plane. Wedge. The wedge is an adaptation of the inclined plane. It can be used to raise a heavy load over a short distance or to split a log.

Explanation:

Hope it helps

Answer:

because these units are derived from combinations of two or more of the seven base units

Answer:

Inter Quartile Range

Explanation:

Quartile is a positional statistical average, which divided the data into 4 equal halves.

Q1 (Lower Quartile) has 25% data below it, 75% above it. Q3 (Upper Quartile) has 75% data below it, 25% above it.

Interquartile range is the measure used to calculate how far the lower & upper quartiles are.

Solution: given that; velocity (v)=60km/hr, distance (d)=500km, time (t)=? From velocity=distance/time....... :. 60=500/t, cross-multiply..... 60t=500, divide both sides by 60...... 60t/60=500/60, t=500/60, t=8.33~. Therefore the bus took 8hours, 33 minutes to cover the distance of 500km.

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