Put the following chemical elements in order from lowest number of protons in the nucleus (top) to the highest number (bottom).1. Hydrogen.2. Helium.3. Carbon.4. Oxygen.5. Iron.

Answer:

Option A is correct.

Explanation:

In the given triangle , x is the base and 14 is the hypotenuse for angle 33°.

cos 33 = base / hypotenuse

Putting the given values

cos 33 = x / 14

.84 = x / 14

x = .84 x 14

= 11.7

Option A is correct.

Answer:

tensional force

Explanation:

It usually exist in fluid or any liquid substance where by an object is put before it

e.g An ant can walk on water without submersed in it.

The true statement for the three given scenarios is: premarital education programs are linked to a higher level of commitment to a spouse; Anorexia nervosa and bulimia nervosa affect women more than men; pubertal growth spurt occurs approximately two years earlier for girls than for boys.

Premarital education programs concentrated on preventing marital distress by promoting discussion of hidden assumptions about marriage and teaching couples the art of communication and relationship skills before problems develop. Hence, they are linked to a higher level of commitment to a spouse. Anorexia nervosa and bulimia nervosa are eating disorders which are more common among female than men according to research. Pubertal growth spurt refers to the fast and intense increase in the rate of growth in height and weight that occurs during the adolescent stage of the human life cycle. A major growth spurt happens at the time of puberty, usually between 8 to 13 years of age in girls and 10 to 15 years in boys. Hence, it occurs approximately two years earlier for girls than for boys.

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Answer:

Acceleration=3.95

Explanation:Use the formula a=m/f

a=128.6/32.5

a=3.95

Answer:

I think its because of the way our eyes see colors

Explanation:

yellow is between green and orange on the spectrum of visible light. that is why it is called the ' yellow ' light

a. The spring constant of the spring be 40 N/m.

b. To stretch it by 1.5 m, required force be 60 N.

In accordance with Hooke's law, a principle of elasticity, for relatively minor deformations of an object, the displacement or size of the deformation is directly proportional to the deforming force or load When the load is removed under these circumstances, the object resumes its original size and shape.

According to Hooke's rule, solids behave elastically when their constituent molecules, atoms, or ions move slightly from their normal places. This movement is proportional to the force that caused it.

a. The spring constant of the spring be: k = 20 N/0.5m = 40 N/m.

b. To stretch it by 1.5 m,  required force = 40×1.5 N = 60 N.

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Answer:

The plane goes for 600 km per hour.

The trip from a city to another is 2.5 hours

Basically, all you have to do is multiply 600 by 2.5.

That’s 1,500 kilometres.

Explanation:

A plane's average speed between two cities is 750 km/hr and if the trip takes 2.5 hours then the total distance covered by the plane would be 1875 kilometers.

The total distance covered by any object per unit of time is known as speed. It depends only on the magnitude of the moving object.

As given in the problem, a plane's average speed between two cities is 750 km/hr and if the trip takes 2.5 hours then we have to find out  the total distance covered by the plane,

The plane's average speed between two cities is 750 kilometers/hour,

time is taken in the whole trip = 2.5 hours

The distance covered by the plane =  750 kilometers/hour×2.5 hours

                                                          = 1875 kilometers

Thus, the total distance covered by the plane would be 1875 kilometers.

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If scientists are interested in studying the composition of the early solar system, the best objects to study are meteorites and comets.

These celestial bodies are considered remnants from the formation of the solar system and can provide valuable insights into its composition and history.

Comets, on the other hand, are icy bodies that originate from the outer solar system and periodically pass through the inner solar system. They are composed of frozen water, gases, and dust and can provide information about the conditions present in the outer solar system at the time of their formation.

When comets pass near the Sun, they release gas and dust, forming a visible coma and tail that can be observed from Earth. Scientists can study the composition of comets by analyzing the gases and dust that are released, which can provide insights into the conditions that existed in the early solar system.

Both meteorites and comets are important sources of information about the early solar system and can help scientists better understand the processes that led to the formation of our solar system and the planets within it.

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Answer:

P.E = 4.398 Joules.

Explanation:

Given the following data;

Spring constant, k = 71.8N/m

Displacement, x = 0.35m

To find the elastic potential energy;

The elastic potential energy of an object is given by the formula;

\( P.E = \frac {1}{2}kx^{2}\)

Substituting into the equation, we have;

\( P.E = \frac {1}{2}*71.8 *(0.35)^{2}\)

\( P.E = 35.9 * 0.1225 \)

Elastic potential energy = 4.398 Joules.

Therefore, the elastic potential energy of the spring is 4.398 Joules.

Answer:

The terms of biosafety in a laboratory require that the person must not have the eyes and skin exposed.

Explanation:

A corrosive substance is a substance that can damage a surface when they come into contact.

These substances represent a danger in people since they can burn the eyes, the skin, and the inside of the body since the inhalation of gases can burn the respiratory tract.

These chemical burns can be avoided by properly following the biosafety protocol that a laboratory requires the use of masks, goggles, gloves, and an apron or lab coat.

We need more 50 g of KNO3

Solubility is the ability of a substance to dissolve in a solvent (usually a liquid) to form a homogeneous solution. It is a property of a substance and can be defined as the maximum amount of a substance that can dissolve in a given amount of solvent at a specified temperature and pressure.

The solubility of the KNO3 at this temperature is 80 g/100 g water. If we have already 3og of the solute then we need an extra 50 g to make a saturated solution.

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F = ma, or force equal to mass times acceleration, is Newton's second law of motion.

Second Law of Movement by Newton Since it shows how powers and movement are connected, F=ma is essential. You can use it to determine an object's velocity and position, as well as its acceleration with known forces. For inventors, scientists, and engineers, This is extremely helpful.

As per Newton's Second Law of Movement, when a power works on a mass, the mass speeds up (gains speed) (object). When you ride a bicycle, you can see this law of motion in action in a great way. Your bike makes up the mass. Your leg muscles press against the bicycle's pedals to produce the force.

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A container gas expands to fill a 3l container and has a mass of 129g its density is equal to 0.043 \(kgm^{-3}\)

Let's understand the answer in detail

Density is equal to the mass of a substance divided by its volume. The SI unit of density is Kg/m3. Other units of density are g/cm3, g/mL, kg/L

The formula we are using is going to be

D=m/v, where

D= density

m=mass

V=volume

The data that is given to us states that

mass = 129g

volume= 3 L

density = ?

Now we will put the values in the formula,

d= m/v

d = 0.129 Kg / 3L

d = 0.043 Kg / L

Therefore the density of the gas is 0.043 Kg / L.

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I agree with the application of such offenses where criminal responsibility is imposed on strict liability offenses because it is needed to protect public welfare, promote safety, and deter potential harm.

Strict liability offenses are those in which liability is imposed without requiring proof of intent or guilty mind. These offenses focus on the act itself rather than the mental state of the offender. The rationale behind strict liability offenses is often rooted in the need to protect public welfare, promote safety, and deter potential harm.

An argument in favor of strict liability offenses is that they ensure accountability for certain actions that pose a significant risk to society, even in the absence of intent or mens rea. By placing the burden on individuals to adhere to certain standards or regulations, strict liability offenses can help prevent accidents, protect public health, and maintain order.

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Answer:

Explanation:

The density of a substance can be found by using the formula

\(density = \frac{mass}{volume} \\\)

From the question

mass of iron = 8 g

volume = final volume of water - initial volume of water

volume = 49 - 46 = 3 mL

We have

\(density = \frac{8}{3} \\ = 2.666666...\)

We have the final answer as

Hope this helps you

Answer:

Acceleration (a) is the change in velocity (Δv) over the change in time (Δt), represented by the equation a = Δv/Δt. This allows you to measure how fast velocity changes in meters per second squared (m/s^2).

The saturation of the soil sample is 0.16 and the dry unit weight is X kN/m3.

The saturation of the soil sample can be calculated using the relationship between porosity and saturation. Porosity (n) is defined as the ratio of the void volume to the total volume of the soil sample. It is given that the porosity of the soil sample is 0.49. Since porosity is the ratio of void volume to total volume, the saturation (S) can be calculated as 1 minus the porosity:

Saturation (S) = 1 - porosity = 1 - 0.49 = 0.51

To calculate the dry unit weight (γd) of the soil sample, we need to consider the specific gravity (Gs) and the moisture content (w). The dry unit weight is the weight of the solid particles per unit volume of the soil sample. The formula to calculate the dry unit weight is:

γd = Gs * γw / (1 + w)

Given that the specific gravity (Gs) is 2.41 and the moisture content (w) is 0.33, we can substitute these values into the formula to calculate the dry unit weight.

Therefore, the saturation of the soil sample is 0.16, and the value of the dry unit weight is X kN/m3.

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The resolution of the images produced by the visible light telescope will be higher than that of the radio telescope, due to the difference in wavelength.

When there were two telescopes with the same diameter, but one is a visible light telescope and the other a radio telescope, the resolution of the images from each telescope would be different. The wavelength of visible light is several hundred nanometers (1 nanometer = 10−9 meters), while the wavelength of radio waves is much longer, typically on the order of meters or centimeters.

Hence, we can compare the resolution of visible light and radio telescopes. This means that the visible light telescope will be able to resolve more details, since it can detect smaller details due to its smaller wavelength.

Radio telescopes have a lower resolution compared to visible light telescopes because of their longer wavelength. The resolution of an optical telescope is limited by the size of its aperture. The smaller the aperture, the more diffracted the image. As the aperture size grows, the resolving power of the instrument improves.

The same is not true of radio telescopes because their wavelength is so much longer than visible light. The aperture size of a radio telescope would have to be several kilometers in diameter to achieve the same resolution as a visible light telescope of the same size. This is why radio telescopes are usually much larger than optical telescopes.

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Answer:

D = 4.05 km

Explanation:

In this case, it's really neccesary to analyze the given data.

First, the rider goes 10 km SE 15°. Then 11 km 30° to the NE direction. Then, he dispatch the order, and then, takes a shorcut to get back at 22 km heading W (This is the missing data of your exercise).

According to all these data, we have the magnitude of the displacement in each part of the travel, but to know the displacement we need to know the x and y components of these magnitudes, so we can really know the total displacement of the rider.

Let's cut this by parts. Part A would be the 10 km SE, Part B 11 km 30° NE and finally Part C would be the remaining 22 km

Part A:

in this case, is heading south east, so it's going in the x-axis positive but y-axis negative so:

Dxa = 10 cos15° = 9.659 km

Dya = 10 sin15° = 2.588 km (But as we are heading south is negative) = -2.588 km

Part B:

Heading NE, it's positive in the x-axis and y-axis so:

Dxb = 11 cos30° = 9.526 km

Dyb = 11 sin30° = 5.5 km

Part C:

Finally in this part is heading west, which means is heading in the x-axis negative, and it does not have a y component so:

Dxc = Dc = -22 km

Now that we have the displacement for each part and it's components, let's calculate the displacement in X and Y:

Dx = 9.659 + 9.526 - 22 = -2.815 km

Dy = -2.588 + 5.5 = 2.912 km

To calculate the magnitude of the displacement:

D = √Dx² + Dy²

D = √(-2.815)² + (2.912)²

Hope this helps

The Federal Reserve helps to regulate the economy of the United States. So, the correct option is D.

Marketing is defined as the activities done for promoting the products through creating offers and communicating to the customers.

Here,

The Federal Reserve of the United state is functioning as a Central Bank, such that they are maintaining the financial aspects of the system.

The Federal Reserve has a great role in regulating the financial system and at the same time, the establishing of the monetary policies.

The primary functions of the Federal Reserve includes the functions of maintaining the banking operations and reliable payments for the system.

Hence,

The Federal Reserve helps to regulate the economy of the United States.

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Recall the concepts about kinetic and potential energies.

Kinetic energy = The energy due to the motion of the object

Potential energy = The energy due to the position of the object.

Position 1:

At this position, the kinetic energy is minimum due to the non-motion of the roller coaster but the potential energy is maximum due to the height.

Position 3:

At this position, the potential energy is minimum since the height is almost zero but the kinetic energy is maximum due to the motion.

Position 2:

The kinetic and potential energy of the roller coaster car will be equal to each other at a point that is halfway between positions 1 and 3 that is position 2.

At this point, the roller coaster has enough motion and height such that kinetic and potential energy will be equal to each other.

The kinetic energy is increasing and the potential energy is decreasing but at position 2, they will be equal.

The energy content of preterm and term breast milk is comparable at approximately 20 kcal per ounce (oz). This similarity in energy content ensures that both preterm and term infants receive adequate nutrition for growth and development.

Breast milk is a remarkable substance that is uniquely tailored to meet the nutritional needs of infants. It undergoes changes in composition based on various factors, including the age of the baby and the duration of lactation. The energy content of breast milk is largely influenced by the concentration of macronutrients, such as carbohydrates, proteins, and fats.

For both preterm and term infants, breast milk provides an optimal source of nutrition, delivering essential nutrients, antibodies, and growth factors. The comparable energy content in pre-term and term breast milk is crucial for meeting the energy demands of these infants, supporting their growth, and facilitating weight gain.

In the case of preterm infants, who are born before completing a full term of gestation, their nutritional needs may differ from those of term infants. Preterm breast milk often contains higher concentrations of certain nutrients to compensate for the nutritional challenges faced by premature babies, including their higher energy requirements.

Despite these slight variations, the energy content of preterm and term breast milk remains relatively similar, with both providing approximately 20 kcal per ounce. This similarity underscores the remarkable adaptability of breast milk, allowing it to support the specific needs of infants, whether they are born preterm or at full term.

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16) 6.00 x 10⁸ radon atoms are left after 100 days.

17) It will take approximately 229.8 days for the activity to drop to 5 x 10^5 Bq.

Both problems involve radioactive decay and the use of the half-life formula, which relates the amount of radioactive substance remaining after a certain time to its initial amount and its half-life.

For problem 16, we can use the half-life formula to find the fraction of radon atoms that remain after 100 days:

N/N_0 = (1/2)^(t/T1/2)

where N is the number of atoms remaining after time t, N_0 is the initial number of atoms, T1/2 is the half-life, and ^ represents exponentiation.

Substituting the given values, we get:

N/N_0 = (1/2)^(100/3.83) = 0.012

Thus, the number of radon atoms remaining is:

N = N_0 x 0.012 = (5.00 x 10¹⁰) x 0.012 = 6.00 x 10⁸

For problem 17, we can use the half-life formula to find the time required for the activity to drop to a certain level:

N/N_0 = (1/2)^(t/T1/2)

where N/N_0 is the fraction of remaining activity, and we can solve for t in terms of T1/2:

t = T1/2 x log(N/N_0)/log(1/2)

Substituting the given values, we get:

t = 3.83 x log(5.00 x 10⁵/5.00 x 10¹⁰)/log(1/2) = 229.8 days

Therefore, it will take approximately 229.8 days for the activity to drop to 5 x 10⁵ Bq.

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Answer:

you add

Explanation:

you should add the forces since they act in the same direction as that you'll resolve the two forces

The mass would stay the same, but the weight would be only 16.5%.

Explanation:

Mass is the amount of "matter" in an object, which stays the same everywhere. Weight is the force acting on an object by gravity, which changes depending on nearby bodies. In this case, weight on the moon is 16.5% of that on Earth.

Answer:

At the point of dropping the object, by Newton's first law due to gravitational force \(F_g\) = m × g, accelerates

By Newton's Second law the object reaches impacts on the air with the gravitational force resulting in changing momentum of m×(Final Velocity - Initial Velocity)

As the velocity increases, the rate of change of momentum becomes equivalent to the gravitational force and by Newton's third law, the action action and reaction are equal and opposite hence they cancel each other out

The body then moves at a constant uniform motion down according to Newton's first law

Explanation:

At the point the object of mass, m, is dropped from the height of the tower, the only force acting on the object is the gravitational force such that the object has an acceleration which is the acceleration due to gravity, g, and the gravitational force is therefore = m × g

As the speed of the object increases while the object is falling with the gravitational acceleration the rate at which the object cuts through layers of air which (by Newton's first law of motion, are at rest ) has some buoyancy effect also increases therefore, the object is constantly increasingly changing the momentum of the air which by Newton's second law results, at an high enough velocity, and by Newton's third law, in a force equal to the applied gravitational force

Therefore, the force of the air drag becomes equal to the gravitational force, cancelling each other out and the object then moves according to Newton;s first law, in uniform motion of a constant speed while still falling down.

Answer:

led would be the best for decorations

Explanation:

The two hockey players move off together at a common velocity of 7 m/s after the collision.

What is principle of conservation of momentum?

We can apply the momentum conservation concept to resolve this issue. This rule states that a closed system's total momentum is conserved both before and after a collision.

The product of an object's mass and velocity determines its momentum. As a result, we can determine each hockey player's momentum prior to the contact using the formulas below:

The total momentum of the system before the collision is the sum of these individual momenta:

           p_total = p1 + p2 = 420 kg m/s + 560 kg m/s = 980 kg m/s

The two hockey players fall off together after the collision. After the collision, their velocities are unknown to us, but we do know that their total momentum is still preserved. Hence, we can write:

                     p_total = (m1 + m2) * v_total

where v_total is the common velocity of the two hockey players after the collision. We can rearrange this equation to solve for v_total:

v_total = p_total / (m1 + m2)

= 980 kg m/s / (70 kg + 70 kg)

= 7 m/s

Therefore, the two hockey players move off together at a common velocity of 7 m/s after the collision.

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The total magnification of a compound light microscope is calculated by multiplying the power of the objective lens by the power of the eyepiece.

The objective lens is the lens closest to the object being viewed, while the eyepiece is the lens closest to the eye of the observer. The power of the objective lens is typically marked on the lens itself and ranges from 4x to 100x or more. The power of the eyepiece is also marked on the lens and is typically 10x.

To calculate the total magnification, simply multiply the power of the objective lens by the power of the eyepiece. For example, if the objective lens has a power of 40x and the eyepiece has a power of 10x, the total magnification would be 40 x 10 = 400x.

It is important to note that magnification alone does not determine the quality of an image in a microscope. Other factors such as resolution, contrast, and depth of field also play important roles in producing a clear and detailed image.

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