The periodic table displays
A.
only the important compounds that exist in the world.
B.
only the important elements that exist in the world.
C.
all of the known elements that exist in the world today.
D.
all of the known compounds that exist in the world today.

Answer:

A

Explanation:

Answer:

According to Pascals law, THE PRESSURE EXERTED TO A CONFINED LIQUID IS TRANSMITTED EQUALLY AND UNDIMINISHED IN ALL DIRECTIONS THROUGHOUT THE MASS OF THE LIQUID--Blaise Pascal

so the pressure at A2 must be equal to A1

buy however the F1 will be less than F2 since:

P1=F1/A1 and P2=F2/F1

P1=P2 according to Pascal

so, F1/A1=F2/A2

with less amount of force at P1 THE force gets multiplied.

Therefore it's obvious that option A and B is wrong. I can't see option C properly.

but, you are going to have this option.

C.F1>F2

so the option with F1>F2 is correct

PLEASE MARK BRAINLIEST

Some trained musicians can identify the note C6, which has a frequency of 1050 Hz, after hearing only 12 cycles of the wave.

To understand how trained musicians can identify a note after hearing only a few cycles of the wave, we need to consider the concept of pitch perception and musical training.

Pitch perception refers to the ability to perceive and distinguish between different frequencies of sound waves. Trained musicians often develop a highly refined sense of pitch through years of practice and exposure to various musical tones and intervals.

In this case, the note C6 is specified to have a frequency of 1050 Hz. This means that the sound wave associated with C6 completes 1050 cycles per second.

Now, the statement mentions that some trained musicians can identify this note after hearing only 12 cycles of the wave. This highlights the remarkable pitch perception skills that these musicians possess. They can accurately recognize the specific frequency associated with C6 even with limited exposure to the sound wave.

It's important to note that the ability to identify a note after hearing a few cycles can vary among individuals and depends on their level of musical training and experience.

Trained musicians with highly developed pitch perception skills can identify the note C6, which has a frequency of 1050 Hz, after hearing only 12 cycles of the corresponding sound wave. This ability is a result of their musical training and experience in perceiving and distinguishing different pitches.

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Answer:

All soft drinks contain water. When soft drink bottles are chilled in sub-zero temperatures, the water on account of its anomalous expansion expands. Thus, to provide space for expanding water, soft drink bottles are not completely filled as otherwise they will burst.

Explanation:

Answer:

Soft drink bottles are filled leaving some space between the lid/cap and the liquid level.

Explanation:

The reason is that the soft drinks are cooled below room temperature.  Sometimes they are kept in the hot Sun and weather.  They are subject to a big temperature variation.  Also, there are gases like CO2 mixed in the drink.  So the gases come out of the liquid and expand due to heat.  That creates high pressure.

Water expands when it is cooled to 4 deg. C.  But the bottle (glass) contracts when it is cooled.  So if there is no air gap,  then volume of water (cool drink) will become more than the inside volume of the bottle.  Then the bottle will break due to pressure from water expansion around 8 deg. to 4 deg.C.

When a bottle is opened, due to pressure difference, and temperature difference, the gases come out of drink in the form of bubbles.  So cold drink overflows out.

Also, the soft drink bottles are capped tightly.  When an opener is used to open it using some force upwards, the pulling force also moves the soft drink bottle upwards.  So just after the lid comes off, the top part of the drink comes out due to the pull.  So some drink spills on people who open or, it falls outside.

In order to prevent these problems, some gap is left open between the surface of the soft drink and the top of the bottle.

Answer:

This temperature is equivalent to 87°C.

.

Answer:

ballance

i just took the quiz

Answer: search engine optimization

Explanation:

Answer:

There is no force in space.

Explanation:

Weight is the gravitational force acting on the mass as in space there is no gravity so weight appeares as zero

Answer:

It is because of gravity that your weight of a certain mass becomes zero in space.

Explanation:

From the core concept introduced by Al-Haytham, modern cameras are created.

To find the answer, we have to know about the Camera Obscura.

Thus, we can conclude that, from the core concept introduced by Al-Haytham, modern cameras are created.

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Potential energy is transformed into kinetic energy its correct trust me have a nice day! :)

Answer:

Increase gas pressure and decrease gas temperature

Explanation:

To Create a lab simulation whereby the changes in pressure exerted on the gas will affect the volume of the gas volume negatively ( decrease in gas volume ) the changes that Juana should program is to increase the pressure on the gas molecules because increase in gas pressure  = decrease in gas volume while increase in temperature will lead to increase in gas

Hence in order to effectively achieve the decrease in gas volume with the lab simulation; she should increase gas pressure and decrease gas temperature

Answer:

pressure then volume

Explanation:

edge chemistry 2021

After three half-lives of a radioactive isotope, you would expect to have 12.5 grams of the daughter isotope.

The concept of half-life refers to the time it takes for half of the radioactive substance to decay. During each half-life, the amount of the original radioactive isotope decreases by half, while the amount of the daughter isotope increases.

Since we start with 100 grams of the radioactive isotope, after one half-life, we would have 50 grams of the original isotope remaining, and 50 grams would have decayed into the daughter isotope.

After the second half-life, half of the remaining 50 grams would decay, leaving us with 25 grams of the original isotope and 75 grams of the daughter isotope.

After the third half-life, half of the remaining 25 grams would decay, resulting in 12.5 grams of the original isotope and 87.5 grams of the daughter isotope.

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Answer:

A. A motor

Explanation:

Infrared wave basically have shorter wavelengths than X-rays. The correct option is A.

A section of the electromagnetic radiation spectrum with wavelengths ranging from roughly 700 nanometers (nm) to one millimetre is known as infrared radiation (IR), or simply infrared (mm).

While shorter than radio waves, infrared waves are longer than visible light waves.

Infrared radiation has the ability to ease muscle tension and encourage local blood circulation.

Infrared radiation has been used in conventional medicine to treat conditions including autoimmune diseases and issues with wound healing in addition to relieving muscle pain and tension.

Infrared waves are shorter than radio waves but longer than visible light waves.

Thus, the correct option is A.

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The energy associated with movement is Kinetic Energy, while energy that is stored is Potential Energy.

Two types of energy—kinetic energy and potential energy—describe the condition of a system. While potential energy is the energy stored in an object or system based on its location or configuration, kinetic energy is the energy of motion.

The energy that an object has as a result of motion is known as kinetic energy. The formula KE=1/2mv2 can be used to calculate an object's kinetic energy, which depends on its mass and speed. In this instance, m stands for the object's mass and v for its speed. An object has more kinetic energy the faster it moves. For instance, a moving vehicle has more kinetic energy than a vehicle that is stationary.

On the other hand, potential energy is the energy that an object has as a result of its position or configuration. It is frequently referred to as the energy that a thing possesses as a result of its capacity for labor. Gravitational potential energy, or the energy an item has as a result of its position with respect to a reference point like the ground, is the most typical illustration of potential energy. A lower-altitude item has less gravitational potential energy than a higher-altitude object. PE=mgh, where m is the object's mass, g is the acceleration brought on by gravity, and h is the object's height above the reference point, is the formula for gravitational potential energy.

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Work done by the force is 6.802 Joule

Given:

Therefore displacement of coin along x axis,x=3m

displacement of coin along y-axis,y=4m

force has magnitude = 2.0 N

To Find:

Work done by the force

Solution: Work is done whenever a force moves something over a distance. You can calculate the energy transferred, or work done, by multiplying the force by the distance moved in the direction of the force.

component of force along x-axis, F = 2.0Ncos100

F = 2x(-.173)

F = -(.346)N

component of force in y direction,F₁ = 2.0sin100

F = 2x(.98)

F = 1.96N

work is done by the force on the coin during the displacement will be given as

W = Fx*x + Fy*y

W = -(.346) x 3m + 1.96 x 4

W = 6.802 Joule

Hence, Work done by the force is 6.802 Joule

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A competitive inhibitor increases the apparent value of KM but does not affect Vmax. The strength of the inhibitor can be determined by its Ki value, with a lower Ki indicating a stronger inhibitor.

A competitive inhibitor binds to the active site of an enzyme, which prevents the substrate from binding. This results in an increase in the apparent value of KM (the concentration of substrate required to reach half of Vmax) because the substrate has to compete with the inhibitor for the active site. However, the Vmax remains unchanged because the enzyme can still reach its maximum velocity when the substrate concentration is high enough to overcome the inhibition.
Ki is the dissociation constant for the inhibitor-enzyme complex. It represents the concentration of the inhibitor required to occupy half of the enzyme's active sites. A lower value of Ki indicates a stronger binding between the inhibitor and the enzyme, and therefore a more potent inhibitor.
Regarding the Ki, it represents the inhibition constant, which is a measure of the inhibitor's binding affinity to the enzyme. A lower Ki value indicates a stronger inhibitor, as it requires a lower concentration of the inhibitor to effectively bind to the enzyme and reduce its activity.

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The frequency of the third harmonic of a closed pipe of length 0.3m is 1700 Hz.

The frequency of the third harmonic of a closed pipe can be determined by using the formula:

\(f_n = n\left(\frac{v}{2L}\right)\)

Where,

fn = frequency of the nth harmonic

n = harmonic number

v = speed of sound in air

L = length of the closed pipe

In this case, the length of the closed pipe is given as 0.3m and the speed of sound in air is 340 ms. We are interested in finding the frequency of the third harmonic, which corresponds to n = 3.

Therefore, we can substitute these values into the formula as follows:

\(f_3 = 3\left(\frac{340}{2\cdot0.3}\right)\)

\(f_3\) = 3(566.67)

\(f_3\) = 1700 Hz

It is important to note that this calculation assumes that the pipe is a perfect closed tube with no leaks or openings and that the air inside is stationary and at a uniform temperature.

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Electric force is present between proton and electron of an atom.

The attractive force between the electrons and the proton of the nucleus is called the electric force. This force attract electron towards the nucleus so that it can't escape from the atom easily so this force is very important for the atom.

An atom of this element changes when it forms an ionic bond because the number of electron decreases due to losing of electron in order to get stability. We know that ionic bond forms between atoms when electron is lost or gain by the atom.

So we can conclude that electric force is present between proton and electron of an atom.

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Answer:

velocity= 135m/s

Explanation:

velocity = 300×0.45

= 135m/s²

The force required to decelerate the load and bring it to a stop when traveling up the hill is approximately 1,858.8 lbs.

To determine the force required, we need to consider the forces acting on the load. The main forces involved are the gravitational force, the force applied by the cylinder, and the frictional force opposing the motion.

First, let's calculate the gravitational force acting on the load. The weight of the load can be calculated using the formula: weight = mass × acceleration due to gravity.

Since the weight is given as 1,162 lbs, we can assume the mass is also 1,162 lbs (since weight = mass × acceleration due to gravity, and the acceleration due to gravity is approximately 32.2 ft/s²).

Next, we need to calculate the force due to the inclined plane. The force exerted by the inclined plane is equal to the weight of the load multiplied by the sine of the angle of the incline.

So, the force exerted by the inclined plane is 1,162 lbs × sin(17°).

The deceleration distance of 0.25 inches can be converted to feet (0.25/12 ft) and the initial speed of 60 ft/min can be converted to ft/s (60/60 ft/s).

Now, let's calculate the frictional force. The frictional force is equal to the coefficient of friction (0.3) multiplied by the normal force, which is the weight of the load multiplied by the cosine of the angle of the incline.

So, the frictional force is 0.3 × (1,162 lbs × cos(17°)).

The total force required to decelerate the load and bring it to a stop is the sum of the force exerted by the inclined plane and the frictional force, minus the force applied by the cylinder.

Therefore, the force required is approximately (1,162 lbs × sin(17°)) + (0.3 × (1,162 lbs × cos(17°))) - (3 square inches/1 square inch) = 1,858.8 lbs.

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Answer:

Series

Explanation:

Wired in 'series' means there is only one path for current.....so when either light burns out, the circuit is broken and there is no path for current so the other light will be unlit

We know, length of segment wave is half the wavelength .

Let, wavelength of wave is \(\lambda\).

So, length of segment will be \(\dfrac{\lambda}{2}\) .

Now, it is given that the string vibrates in four segments.

So,

\(L = 4\times \dfrac{\lambda}{2}\\\\L = 2\lambda\\\\\lambda = 1\ m\)

Speed can be given by :

\(speed = wavelength \times frequency\\\\speed = 1\times 120\ m/s\\\\speed = 120\ m/s\)

Therefore, the wave speed in the string is 120 m/s.

Emotional elevation can occur in individuals or in groups, therefore, it is false that emotional elevation only occurs in animal kin groups.

Emotional elevation is the process whereby the moods of individuals are elevated due to their interactions with others or due to other factors.

Emotional elevation can occurs in individual animals or those on animal kin groups.

Therefore, it is false that emotional elevation only occurs in animal kin groups.

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Answer:

F

Explanation:

hi..

its option C..

cuz everyone is equal before the law.. and no one an be discriminated on the basis of their gender, religion, caste, race, colour or anything!..

hope it helps:)

The skater at the local skatepark experiences a downhill motion followed by an uphill motion, coasting down the hill due to the force of gravity and then coasting back up due to the inertia gained during the descent.

When the skater starts coasting downhill, the force of gravity pulls them in the same direction, accelerating their motion. As they gain speed, their potential energy decreases while their kinetic energy increases. At the bottom of the hill, the skater has maximum kinetic energy and minimum potential energy.

When the skater reaches the bottom and starts coasting uphill, their kinetic energy decreases as they move against gravity. However, due to inertia, the skater still possesses some forward motion. The inertia allows the skater to coast up the hill for a certain distance before gradually coming to a stop.

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The maximum velocity of a particle in simple harmonic motion can be calculated using the formula:

Vmax = 2πfA

Where Vmax is the maximum velocity, f is the frequency of oscillation, and A is the amplitude.

In this case, the amplitude is given as 2 m and the frequency is given as 2 cycles per second.

First, we need to convert the frequency from cycles per second to radians per second. Since there are 2π radians in one cycle, we can multiply the frequency by 2π to convert it to radians per second:

2 cycles per second * 2π radians per cycle = 4π radians per second

Now we can substitute the values into the formula:

Vmax = 2π * 4π * 2

Simplifying:

Vmax = 16π² m/s

So the maximum velocity of the particle is 16π² m/s.

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Answer:

The displacement after half a circle would be, given after half the circle, the particle will reach the diametrically opposite point from point A to point B. And, we know displacement is the shortest path between the initial and final point. Hence, the displacement after the half-circle is 2r.

Explanation:

Which is choice C