(a) Complete the following statements by writing appropriate words in the spaces.
The pressure of a gas in a sealed container is caused by the collisions of
with the container wall.
An increase in the temperature of the gas increases the pressure because the
of the
increases.
The force on the wall due to the gas is the pressure multiplied by the
[2]
of the wall.

Answer:

Medium: something in a middle position, maybe in between sizes big or small, or in a situation it's not negative or positive it's just neutral.  (I'm sorry if that wasn't helpful)

Explanation:

The following denotes the massive, positively charged, nuclear particles is protons. A proton is a subatomic particle having a mass of 1.0072766 amu and a positive charge equal in magnitude to that of an electron but of opposite sign.

Protons are located in the nucleus of an atom and are made up of quarks. They are heavier than neutrons, which are the other subatomic particles present in the nucleus of an atom. Electrons, on the other hand, are negatively charged particles that orbit around the nucleus of an atom. They are much lighter than protons and neutrons and are located in the electron cloud outside the nucleus. Isotrons are not real particles. They are not listed in any dictionary of particle physics, nor have they been discovered in any experiment. Neutrons, on the other hand, are subatomic particles that have no charge. They have a mass of 1.008664 amu and are located in the nucleus of an atom along with protons.

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Radii is a vital feature of the elements, and it can be useful in determining the characteristics of elements in various chemical and physical processes. The radii of atoms and ions of the same element differ due to their various charge and mass characteristics.

Atomic and ionic radii increase as you move down a group on the periodic table, and decrease as you move across a period from left to right due to increased nuclear charge, making the electrons closer to the nucleus. The size of an atom and ion also changes due to the number of electrons charge, and electronic configuration.In order of increasing radius, the arrangement of \(Ne, F-, O2-, Br-, Rb\) is given as follows:

\(Ne < F- < O2- < Br- < Rb+\)

Rb+ has the smallest radius due to its large nuclear charge and fewer electrons in the valence shell.

As a result, they are larger than Rb+. O2- has more electrons than Ne and is the largest among the given ions and atoms. It is important to note that in certain conditions, the trends in radii may not be valid because of hybridization and other factors. Nonetheless, this arrangement is valid for the given ions and atoms.

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A colored light ray enters the air after passing through water (n = 1.33). The relative change in the ray's speed, frequency, and wavelength once it enters air is accurately described by the fact that both its speed and wavelength increase. Here option C is the correct answer.

When a light ray passes from one medium to another, such as from water to air, its speed, frequency, and wavelength change. The extent of this change depends on the refractive indices of the two media.

In this case, the refractive index of water is 1.33 and that of air is 1.00. When the monochromatic light ray enters air from water, its speed changes because the speed of light in air is greater than its speed in water. Since the speed of light in a medium is inversely proportional to its refractive index, the light ray's speed increases as it enters air. Therefore, option C, which says that its speed and wavelength both increase and its frequency decreases, is the correct answer.

The frequency of the light wave, which is the number of oscillations per second, remains the same because the frequency of the light wave is determined by the source that produced it and is independent of the medium through which it travels.

The wavelength of the light wave changes because the speed of light is different in the two media. Since the frequency of the wave is constant, the wavelength must change to ensure that the speed of the wave matches the speed of the medium through which it is traveling.

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Complete question:

A monochromatic light ray that has been traveling through water (n = 1.33) enters the air. After the ray enters the air, which of the following correctly describes the relative change in the speed and frequency? and wavelength of the ray?

A - its speed and wavelength both decrease; its frequency increases.

B - its speed and wavelength both decrease; its frequency stays the same.

C - its speed and wavelength both increase; its frequency decreases.

D - its speed stays the same, its wavelength increases, and its frequency decreases. its speed and wavelength both increase; its frequency stays the same.

The tension on the rope must be equal to the weight of the objects that are attached

The tension force is the force that acts on the rope a it is attached to a point in order to hold a mass in place. The tension force is responsible for the tautness of the rope.

As such the tension on the rope must be equal to the weight of the objects that are attached thus; T=w=mg.

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Answer:

4

Explanation:

20-0=20 m/s

20/5=4 m/s2

Answer:

Both balls have the same downward acceleration (and speed)

Answer: D

Explanation: Examples of action-reaction pairs include a swimmer pushing off a wall, helicopters creating lift by pushing air down, and an octopus propelling itself forward by ejecting water from its body.

Federal reserve decreases the required reserve ratio.

Banks have more money to lend

Money supply increases

Interest rates fall

Households and business take out more loans

Purchases and investments increases.

There are two types of monetary policies, Expansionary and Contractionary.

The government decides the monetary policy based on the economy of a country. The government will have expansionary monetary policy when it requires more money in the economy. Interest rates are lowered and money supply is increased. This results increase in Gross Domestic products of the country and the economy strengthens.

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Answer:

Below is the answer

Explanation:

Answer:

OK draw a diagram - you have the force from (b) acting sown the slope and a component of the weight. Use F=ma to get the deceleration and then use SUVAT. Post your working if this doesn't work.

friction = 900N

braking = 3100N

total = 4000N

w= mxg = 1000*9.81= 9810N

total = 9810 + 4000 = 13810N

force/mass = 13810/1000 = 13.81ms^-2

then using v^2 = u^2 + 2as, i get s as 14 but it is incorrect

Explanation:

The radiation emitted from an area A of a black body at absolute temperature T is directly proportional to the fourth power of the temperature, according to Stefan Boltzmann's equation.

Mathematically, u/A = σ T⁴

where,

σ is Stefans's constant(5.67 × 10⁻⁸ W/m²k⁴)

According to the equation above, a body that is not a black body receives less radiation and consequently emits less of it.

For such a body, u = e σ A T⁴

where,

e is emissivity(value lies between 0 and 1)

With the surrounding temperature T₀, energy radiated by an area per unit time.

Δu = u - u₀ = e σ A (T⁴ - T₀⁴)

The blackbody's temperature and the quantity of power it emits per unit area are related by Stefan Boltzmann's law. The total energy emitted or radiated by a black body per unit surface area across all wavelengths and per unit time is directly proportional to the fourth power of the black body's thermodynamic temperature, according to the law.

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Answer: 5.96m/s

Explanation:

Given the following :

Mass of car (m) = 1500kg

Velocity (V) = 5.25m/s

Forward force of engine = 1250N

Diatance moved = 4.8m

Final Velocity =?

Final kinetic energy = Initial kinetic energy + work done by engine

Initial kinetic energy = 0.5 × mass × velocity^2

Initial kinetic energy = 0.5 × 1500 × 5.25^2

Initial kinetic energy = 20671.875 J

Work done by engine = Force × distance

Work done by engine = 1250 × 4.8 = 6000J

Final kinetic energy = (20671.875 + 6000) J

= 26671.875 J

From kinetic energy = 0.5mv^2

26671.875 = 1/2 × 1500 × v^2

53343.75 = 1500v^2

v^2 = 35.5625

v = sqrt(35.5625)

v = 5.96m/s

No, the sun cannot explain global warming. Global warming is a phenomenon in which the temperature of the Earth's surface and atmosphere is rising continuously due to human activities such as deforestation, burning of fossil fuels, and industrialization.

This increase in temperature cannot be explained only by an increase in solar radiation.There are several factors which contribute to global warming, including greenhouse gases such as carbon dioxide, methane, and water vapor. These gases trap heat in the Earth's atmosphere, which causes the planet's temperature to rise. The sun's radiation does contribute to global warming, but it is not the main cause.

i) To calculate the increase in solar radiation that would cause the Earth to warm up by 1 K, we can use the following formula:ΔS = ΔT / αWhere ΔS is the increase in solar constant, ΔT is the increase in temperature, and α is the Earth's albedo (reflectivity).α = 0.30 is the standard value used for the Earth's albedo.ΔS = ΔT / αΔS = 1 K / 0.30ΔS = 3.33 W/m2So, to explain the increase in temperature of 1 K over the last hundred years, the solar constant would need to increase by 3.33 W/m2.

ii) The observed fluctuation of the solar constant over the past 400 years has been around 0.1% to 0.2%. This is much smaller than the 3.33 W/m2 required to explain the increase in temperature of 1 K over the last hundred years. Therefore, it is unlikely that the sun is the main cause of global warming.

The sun cannot explain global warming. While the sun's radiation does contribute to global warming, it is not the main cause. The main cause of global warming is human activities, particularly the burning of fossil fuels, which release large amounts of greenhouse gases into the atmosphere.

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Answer:

Thanos went *snap*

Explanation:

Answer:

By pointing one's right thumb along the direction of the current, the direction of the magnetic field can by found by curving one's fingers around the wire. The strength of the magnetic field depends on the current I in the wire and r, the distance from the wire.

Answer:

The magnetic field strength is H=I/2πr

Explanation:

A current I through a long, straight wire produces a magnetic field with strength H=2πr at distance of r from the wire. So the field strength is inversely proportional to the distance from the wire.

Answer:

Planck postulates that the energy exchanges between matter and radiation do not take place in continuous manner but by discrete and indivisible quantities or quanta of energy. He then shows that the quantum of energy must be proportional to the frequency ν of the radiation. (1.1) where h is known as the Planck’s constant.

Explanation:

A network of nerves known as the sympathetic nervous system aids in the body's "fight-or-flight" reaction. When you're under stress, in danger, or engaged in physical exercise, this system becomes more active.

increases in heart rate, blood pressure, breathing rate, and pupil size are caused by this area of the neurological system. Additionally, it results in blood vessels narrowing and a decrease in digestive juices.

The sympathetic nervous system is a portion of the nervous system that is responsible for producing reflex cardiovascular system alterations as well as localized adjustments (such sweating in reaction to a rise in body temperature).

Along with its opposite, the parasympathetic nervous system, the sympathetic nervous system is a component of the autonomic nervous system. The thoracic and lumbar spinal cord segments, collectively referred to as the thoracolumbar division, are where the sympathetic nervous system originates (T1 to L2,3).

Thus, A network of nerves known as the sympathetic nervous system aids in the body's "fight-or-flight" reaction.

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The pressure of 76 cm of mercury column is approximately 101325 Pa.

Pressure is typically measured in units of pascals (Pa). However, in some cases, other units such as centimeters of mercury (cmHg) or millimeters of mercury (mmHg) may be used. To convert these units to pascals, we can use the conversion factor that 1 atm = 101325 Pa.

In the case of 76 cm of mercury column, we can use the conversion factor of 1 atm = 76 cmHg, which gives us:

1 atm = 76 cmHg

1 atm = 76 cmHg x 1/2.54 cm/in x 1 in/12 ft x 1 ft/0.3048 m x 1000 mm/m

1 atm = 101325 Pa

As a result, the pressure in a 76 cm mercury column is roughly 101325 Pa.

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Answer:

C. Wedge

Explanation:

Answer:

GIVE THE PERSON ABOVE BRAINLIEST UwU

Explanation:

B. magnitude and direction.

When two forces of equal size are working in opposite directions—one in the east and one in the west—the results of the two pressures are not the same.Therefore, the magnitude and direction should be provided in order to accurately characterize a force.

We can define force as that of the push or pull on an item with a certain magnitude and direction as we know that what a push or a pull indeed has magnitude and direction (hence, it is vector quantity).

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In physics, the final speed of an object in freefall (with no friction) depends only on the initial height from which it falls and the acceleration due to gravity, not on its mass.

According to the equation of motion, the final velocity of an object in freefall is given by v = sqrt(2gh), where v is the final velocity, g is the acceleration due to gravity (approximately 9.8 m/s^2 on the Earth's surface), and h is the initial height.

In this scenario, all objects, regardless of their mass, will reach the same final velocity if they are dropped from the same height. This is because the force of gravity acting on an object is proportional to its mass, but the acceleration due to gravity is the same for all objects. So, the final velocity of an object in freefall is not affected by its mass.

It's important to note that this is true only in the absence of friction and air resistance. In real-world scenarios, friction and air resistance can affect the final velocity of an object, and the mass of an object can affect its final velocity to some extent through air resistance

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Answer:

(i) Please see graph of the motion of the particles created with MS Excel and the calculations in the following sections

(ii) The time of collision is approximately 1.0 seconds

(iii) The common horizontal distance of point collision from the point of projection is approximately 25.2 meters

Explanation:

The velocity with which the first projectile was fired, v₁ = 21 m/s

The angle to the horizontal the particle is launched = 53.1°

The time at which the other particle was launched = 1 second later

The location from which the other particle was projected = 0.3 m below the first particle

The initial velocity of the second particle = 31.5 m/s

The angle to the horizontal at which the second particle was projected, θ = 36.9°

(i) The height reached, by each of the particle is given as follows;

y = u·t - 1/2·g·t²

For the first projectile, we have;

y = 21·(t₁+1)×sin(53.1°) - 9.81·(t₁+1)²/2 + 0.3

For the second projectile, we have;

y= 31.5·(t₁)×sin(36.9°) - 4.905·(t₁)²

If the two projectiles collide, we get;

21·(t₁+1)×sin(53.1°) - 9.81·(t₁+1)²/2 + 0.3  = 31.5·(t₁)×sin(36.9°) - 4.905·(t₁)²

Using a graphing calculator for simplifying, we get;

-11.93·t₁ + 12.2 = 0

t₁ = 12.2/11.93 ≈ 1.02

Therefore, at time t₁ = 1.02 seconds, after the launch of the second particle, the two particle will be at the same vertical height

However, whereby at the time, t₂, the particles collide, the horizontal distance travelled, 'x', will be equal;

We have;

x = u·cos(θ)·t₁

For the first particle, we have;

x₁₁ = 21 × cos (53.1°) × (t₂ + 1)

For the second particle, we have;

x₂₂ = 31.5 × cos (36.9°) × t₂

At the point of collision, we have;

x₁ = x₂

∴ 21 × cos (53.1°) × (t₂ + 1) = 31.5 × cos (36.9°) × t₂

31.5 × cos (36.9°) × t₂ - 21 × cos (53.1°) × t₂ = 21 × cos (53.1°)

t₂ = 21 × cos (53.1°)/(31.5 × cos (36.9°)  - 21 × cos (53.1°) ) = 1.00219236871

t₂ ≈ 1.0 seconds

Given that t₁ ≈ t₂, the particles reach the same height and the same horizontal distance at the same time, t₂ ≈ 1.0 and therefore, they collide.

(ii) The time of collision is found above as t₁ ≈ t₂ ≈ 1.0 seconds

(iii) The horizontal distance of the point of collision from the starting point, 'x', is given as follows;

x = 21 × cos (53.1°) × (1.0 + 1) ≈ 25.2

The horizontal distance of the point of collision from the starting point, x ≈ 25.2 meters

The vertical distance of the point of collision from the starting point of the second particle, 'y', is given as follows;

y = 21 × (1+1)×sin(53.1°) - 9.81 × (1+1)²/2 + 0.3 ≈ 14

The vertical distance of the point of collision from the starting point of the second particle, y ≈ 14 meters

The magnitude of the distance from the starting point of the second particle, r = √(25.2² + 14²) ≈ 28.8

The magnitude of the distance from the starting point of the second particle, r ≈ 28.4 meters.

(a) The final angular velocity of the flywheel after 3 complete revolutions is 4.96 rad/s.

(b) The time taken for the flywheel to make 3 complete revolutions is 5.93 s.

The final angular velocity of the flywheel after 3 complete revolutions is determined by applying third kinematic equation as shown below;

θ = 2π (rad/rev) x (3 rev) = 18.85 rad

ωf² = ωi² + 2αθ

ωf² = (1.4)² + 2(0.6)(18.85)

ωf² = 24.58

ωf = √24.58

ωf = 4.96 rad/s

The time taken for the flywheel to make 3 complete revolutions is calculated as follows;

ωf = ωi + αt

t = (ωf  - ωi)/α

t = (4.96 - 1.4)/0.6

t = 5.93 s

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Answer:

300 N

Explanation:

We can use the principle of Pascal's law to solve this problem. According to this law, pressure applied to a confined fluid is transmitted undiminished to every part of the fluid and to the walls of the container.

In this case, the fluid is confined in two cylinders with pistons of different sizes. The force applied on the larger piston is transmitted through the fluid and acts on the smaller piston, resulting in a larger force on the smaller piston.

We know that the force applied on the larger piston is 1500 N and the area of the larger piston is 25 m^2. Therefore, the pressure applied on the fluid is:

P = F/A = 1500 N / 25 m^2 = 60 Pa

This pressure is transmitted undiminished to every part of the fluid and acts on the smaller piston, which has an area of 5 m^2. Therefore, the force acting on the smaller piston is:

F = P × A = 60 Pa × 5 m^2 = 300 N

Therefore, a force of 300 N is needed to lift the crate.

The parts of the frontal lobe that fire when performing certain actions or when observing another doing so are called mirror neurons.

These are a type of brain cells that activate both when an individual performs a specific action and when they observe another person performing the same action.

They play a crucial role in understanding and imitating the actions of others, as well as in empathy and social cognition.

These are believed to be involved in various processes, such as motor imitation, empathy, language development, and understanding the intentions and emotions of others.

They contribute to our ability to learn through observation and mimicry, facilitating social interaction and communication.

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The fixed angular speed, w is 33.774rpm

The angular speed is a measure of how quickly the central angle of a spinning body changes with respect to time. The angular speed formula is the link between angular speed and linear speed, as well as a few angular speed difficulties.

Msanjay = Mting = m = 25kg

M= 150kg

R = 3/2m = 1.5m

r = 0.35m

w = 21 rpm

The initial moment of Inertia

Ii = (MR²/2 + MR² + MR²)

The final moment of Inertia

If = (MR²/2 +mr² +mr²)

From angular-momentum conservation

We know that

I final = I initial

Ifw = Ii wₙ

(MR²/2 +2mr²)w = (MR²/2 + 2MR²)wₙ

substituting the value in the above equation we get,

(174.875)w = 281.25 *21

w = 33.774rpm

Thus, the fixed angular speed, w is 33.774rpm

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Answer: C

Explanation:

c is the right answer try

To summarize, an object moving in uniform circular motion is moving around the perimeter of the circle with a constant speed. While the speed of the object is constant, its velocity is changing. Velocity, being a vector, has a constant magnitude but a changing direction.

can u figure it out from there but if anything i think it is  C

To summarize, an object moving in uniform circular motion is moving around the perimeter of the circle with a constant speed. While the speed of the object is constant, its velocity is changing. Velocity, being a vector, has a constant magnitude but a changing direction.

can u figure it out from there but if anything i think it is  C