why discharge does not take place at very low pressure ​

Linear expansivity, area expansivity and volume or cubic expansivity are

Answer:

"This process, which is the opposite of vaporization, is called condensation. As a gas condenses to a liquid, it releases the thermal energy it absorbed to become a gas. During this process, the temperature of the substance does not change. The decrease in energy changes the arrangement of particles."

Condensation is a phase transition where the temperature remains constant but the thermal energy will change.

Condensation is a phase transition that can be described as the process through which the physical state of the matter changes from the gaseous phase into the liquid phase. For example, condensation takes place when water vapour changes into liquid water. When the water vapours in the air come in contact with a cold surface, they condense and become water droplets.

Condensation process by which water vapour is changed into liquid water.  Any gas can be condensed or liquified at high pressure and low temperature.

During the phase transition, the temperature remains constant therefore during the condensation the temperature is constant and the heat energy of the molecules will change. Because when the gas molecules release the energy to get slow down then they clump together and become liquid.

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Down the ramp and then up the ramp is the direction of force of friction.

The force of friction is a type of contact force that opposes the relative motion or tendency of motion between two surfaces in contact. When two surfaces are in contact and one of them is moving or attempting to move relative to the other, the frictional force acts to resist the motion.

The force of friction arises due to the interlocking of surface irregularities or the adhesive forces between the two surfaces in contact. The amount of frictional force depends on several factors, including the nature of the surfaces in contact, the normal force pressing the two surfaces together, and the presence of any lubricants or other substances between the surfaces.

There are two main types of frictional forces: static friction and kinetic (or sliding) friction. Static friction is the force that must be overcome to set an object in motion, while kinetic friction is the force that opposes the motion of an object that is already in motion.

Frictional forces are important in many everyday situations, from the movement of vehicles on roads and the motion of objects on surfaces to the friction between parts in mechanical systems.

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Revolutions made by the blade will be 266 rev

Given:

Constant angular acceleration = 0.82 radians/second^2

number of revolution per minute = 500

To Find:

number of revolution

Solution: Angular Acceleration is defined as the time rate of change of angular velocity. It is usually expressed in radians per second per second.

Initial speed of the helicopter blade, w₁ = 0

The final speed of the blade, wf = 500 rpm = 500 x 2π/60 rad/s = 52.35 rad/s

We need to find the number of revolutions. Firstly we will find the angle turned by the blade. Let the angle is θ

So,

wf^2 - wi^2 = 2αθ

θ = wf^2/2α = 1671 rad

Let there are n number of revolutions made by the blade. So,

n = θ / 2π

n = 1671 / 2 x 3.14 = 266 rev

So, the revolutions made by the blade will be 266 rev

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Answer:

A. 4.67 m/s²

Explanation:

u = 145 m/s

v = 75 m/s

t = 15 s

a = v - u / t

= 145 - 75 / 15

= 4.67 m/s²

Hope this helped...

Answer:

supergiant

Explanation:

Answer:

the picture

Explanation:

you can see i got it right :)

Answer: Kinetic energy is the energy an object has because of its motion

(if it needs to be a one worded answer than just type motion)

The potential energy of an object depends on its mass and its height.

The law of conservation of energy states that energy can be neither created nor destroyed, but it can change its form.

Answer:Kinetic energy is the energy an object has because of its motion. If we want to accelerate an object, then we must apply a force. Applying a force requires us to do work.

As expressed by the equation, potential energy depends upon the mass and the height of the object. Any increase in these two quantities will lead to an increase in the amount of potential energy possessed by the object.

The law of conservation of energy states that energy can neither be created nor destroyed - only converted from one form of energy to another. This means that a system always has the same amount of energy, unless it's added from the outside.

Light will reflect at the same angle off a smooth surface as when it first touches it. The direction of reflected light beams for a flat surface is the same. Specular reflection is what is happening here.

When light reflects off of a surface, it happens. Light will reflect at the same angle it was incident upon if the surface is glossy and smooth.

A smooth polished surface is what is referred to as a reflection when a light ray strikes it and bounces back. Surface reflection occurs when a light beam hits it and then leaves it.

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Answer: The part of color that's reflected is the red that bounces off the paper.

Hope this helps you!!!

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The change in entropy of a system will be 6.25 kJ/K. For further explanation you can read below.

The change in entropy of a system is given by the equation ΔS = Q/T, where Q is the heat transferred and T is the temperature at which the transfer occurs. In this case, the temperature of the hot water is initially 1.00×102 ∘C and it cools to room temperature, which is 20.0 ∘C. Note that entropy is a measure of the disorder or randomness of a system, and that this calculation assumes that the heat from the hot water is completely transferred to the room, increasing its disorder. It also assumes that the specific heat of the cup and any change in temperature of the room are negligible, which is generally a good approximation for a small cup of hot water in a large room.

We can therefore calculate the change in entropy of the room as follows:

ΔS = Q/T = (125 g * 1.00×102 ∘C - 125 g * 20.0 ∘C) / (20.0 ∘C)

      = 6.25 kJ/K

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The static friction force on the box is 25 N.

Static friction is a type of friction force that acts on the body when there is no relative motion between the object and the surface. As a result, even when the body is moving, it can still act. However, there shouldn't be any relative motion.

Weight of box W = mg = 100 N

Static friction coefficient = 0.25

Forces acting on box are I) Weight of box mg downwards, 2) Normal force on box N upwards 3)Friction force fs to the left and 4) Applied force P to the right.

N-mg=0⇒ N = mg

Net force acting on box in the vertical direction is zero,

\(f_{s}\) ≤ \(\mu_{s}\) N⇒\(f_{s}\) ≤ \(\mu_{s}\)mg⇒\(f_{s,max}\) = \(\mu_{s}\)mg

Net force acting on box in the horizontal direction is P - \(f_{s}\) = 0⇒P= \(f_{s}\) (until the box starts moving)

For the the box to move P = \(f_{s,max}\)

P= \(\mu_{s}\)mg = 0.25 × 100 = 25 N.

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Here's the formula you want to use to solve this:

Distance = (1/2) · (acceleration) · (time²)

We know the distance to the ground and the acceleration of gravity, so let's pluggum in:

. . . . . 125 m = (1/2) (9.8 m/s²) (time²)

Divide each side by (4.9 m/s²):  

. . . . . (125 m) / (4.9 m/s²) = time²

. . . . . 25.51 s² = time²

Square-root each side:

5.05 seconds  = time

The wheels on a bicycle have a 10 inch radius. If the bike must travel exactly 2000 inches, the number of revolutions the wheel would make will be 31.85 revolutions.

The perimeter of the circle is called the circumference of circle.

Given, radius of the wheel = 10 inches

Diameter of the wheel = 20 inches

Length required to cover = 2000 inches

For one revolution, distance equal to the circumference moved.

1 rev = π D

1 rev = π * 20

1 rev = 62.8 inches

Number of revolutions to travel 2000 inches is 2000/62.8 = 31.85 rev

Thus, the number of revolutions required are 31.85 rev.

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Have an amazing day you are an amazing person:)

The time a baseball that is thrown horizontally with a velocity of 15 m/s off a cliff that is 100 meters tall will be in the air is 4.54 seconds.

Velocity can be defined as the rate of change of the object's position with respect to a frame of reference and time.

If a baseball is thrown off a cliff that is 100 meters tall. The ball is thrown horizontally (forwards) with a velocity of 15 m/s. The baseball will be 4.54 seconds in the air.

From the equation, the given parameters are

height of cliff =  100 m

velocity = 15m/s

time = ?

g = acceleration due to gravity = 9.81 m/s²

we have that

S = u + 1/2gt²

100 = 5 + 1/2 * 9.8 * t²

100 - 5 = 4.9 * t²

95 /4.9 = t²

t = √20.65

t = 4.54 seconds.

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Explanation:

Taking g=10m/s²

P.E =mgh

981J= 2×10×m

981J=20m

m. = 981J/20

m. = 49.05kg

The distance that this particle has traveled between T0 = 1s and T1 = 3s is 0.

To find the distance that the particle has traveled between T0 = 1s and T1 = 3s, we need to calculate the displacement during this time interval. Displacement can be found by integrating the velocity function over the given time interval.
Given the velocity function v(T) = AT + BT^2, where A = 1 m/s^2 and B = -1 m/s^2, we can integrate it to find the displacement function.
First, integrate AT with respect to T:
∫(AT) dT = (1/2)AT^2 + C1
Next, integrate BT^2 with respect to T:
∫(BT^2) dT = (1/3)BT^3 + C2
Where C1 and C2 are constants of integration.
Now, we can find the displacement between T0 and T1 by evaluating the displacement function at T1 and subtracting the displacement at T0:
Displacement(T1) - Displacement(T0) = [(1/2)AT1^2 + C1 + (1/3)BT1^3 + C2] - [(1/2)AT0^2 + C1 + (1/3)BT0^3 + C2]
Since C1 and C2 are constants, they cancel out when subtracted:
Displacement(T1) - Displacement(T0) = (1/2)AT1^2 + (1/3)BT1^3 - (1/2)AT0^2 - (1/3)BT0^3
Substituting the given values T1 = 3s and T0 = 1s, and the values of A and B:
Displacement(3) - Displacement(1) = (1/2)(1)(3)^2 + (1/3)(-1)(3)^3 - (1/2)(1)(1)^2 - (1/3)(-1)(1)^3
Simplifying the equation:
Displacement(3) - Displacement(1) = 9/2 + (-9/3) - 1/2 + (-1/3)
Displacement(3) - Displacement(1) = 9/2 - 3 - 1/2 + (-1/3)
Displacement(3) - Displacement(1) = 9/2 - 6/2 - 1/2 + (-1/3)
Displacement(3) - Displacement(1) = (9 - 6 - 1 + (-2))/2
Displacement(3) - Displacement(1) = 0/2
Displacement(3) - Displacement(1) = 0
Therefore, the distance that this particle has traveled between T0 = 1s and T1 = 3s is 0.

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Answer:4

Explanation:

If the velocity of an airplane is doubled, then its kinetic energy will increase by a factor of four.

The ability of an object to do work by virtue of its motion.

The kinetic energy is represented mathematically as

K.E = 1/2 mv²

where v is the velocity with which the object is moving and m is its mass.

When the velocity is doubled, kinetic energy is

K.E' = 1/2 m(2v)²

K.E' =4 x ( 1/2 mv²)

Thus,  airplane's kinetic energy will increase by a factor of four.

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The initial acceleration of the shuttle is approximately 17.22 m/s².

The initial acceleration of the shuttle can be calculated using Newton's second law of motion: F = ma.

First, we need to find the horizontal component of the force. Since the force is at a 45° angle, we can use trigonometry:

F_horizontal = F * cos(45°) = 19.0 N * cos(45°) = 19.0 N * 0.707 ≈ 13.43 N

Next, convert the mass of the shuttle from grams to kilograms:

Mass = 780 g = 0.780 kg

Now, we can apply Newton's second law:

13.43 N = 0.780 kg * a

Solving for the acceleration (a):

a ≈ 13.43 N / 0.780 kg ≈ 17.22 m/s²

The initial acceleration of the shuttle is approximately 17.22 m/s².

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Answer:

A: It allows scientists to challenge inaccurate information.

Explanation:

½ × 18 × 6² = 324 J

hope that helps^^

The correct answer is option B. It travels up and down. Transverse waves are characterized by the fact that they cause particles in the medium to move perpendicular to the direction of wave propagation.

Transverse waves are a type of wave that causes the particles of the medium to move up and down or side to side as the wave passes through them.

The other options are not right because:

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Since pure water is neutral, the pH and pOH values are equal. Hence, the pH and pOH of pure water at 40 °C would both be approximately 6.27.

The ionization constant for water, Kw, is a measure of the degree to which water dissociates into hydrogen ions (H+) and hydroxide ions (OH-). It is defined as the product of the concentration of H+ ions and the concentration of OH- ions in water at a given temperature.

In pure water, the concentration of H+ ions is equal to the concentration of OH- ions. Therefore, at 40 °C, the concentration of H+ and OH- ions in pure water would be equal to the square root of Kw, which is 2.9 × 10–14. Taking the square root of Kw gives us a concentration of approximately 5.39 × 10–7 M for both H+ and OH- ions.

The pH of a solution is a measure of its acidity and is defined as the negative logarithm (base 10) of the H+ ion concentration. Therefore, the pH of pure water at 40 °C would be calculated as follows:

pH = -log[H+]

= -log(5.39 × 10–7)

≈ 6.27

Similarly, the pOH of a solution is a measure of its alkalinity and is defined as the negative logarithm (base 10) of the OH- ion concentration. Therefore, the pOH of pure water at 40 °C would be:

pOH = -log[OH-]

= -log(5.39 × 10–7)

≈ 6.27

Since pure water is neutral, the pH and pOH values are equal. Hence, the pH and pOH of pure water at 40 °C would both be approximately 6.27.

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Answer:

Explanation:

Specific heat capacity of a body is expressed as H = mcΔt

H = heat energy released by the body

m = mass of the body

c = specific heat capacity of the body

Δt  = change in temperature of the body

Given H = 2000J, m = 0.5 kg, c = 4,186 J/kg° C.

Δt = H/mc

On substituting the given value;

Δt  = 2000/4,186*0.5

Δt   = 2000/2093

Δt = 0.96°C

The temperature difference between when the blood arrives at the body surface and returns back to the Interior of the body is 0.96°C

During capillary action, the water will rise higher in a narrower tube or channel with a smaller diameter.

This is because the smaller diameter creates a greater surface tension, which pulls the water upward against gravity. Additionally, a surface with a higher degree of attraction to the water molecules will also enhance capillary action, allowing the water to rise higher.
                                     This is because the adhesive forces between the water molecules and the tube's surface, as well as the cohesive forces between the water molecules themselves, are stronger in smaller diameter tubes, leading to a greater capillary rise.

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A system gains 627 kJ of heat, resulting in a change in internal energy of the system equal to 246 kJ . the work done by the system is 381 kJ.

The first law of thermodynamics states that the change in internal energy of a system is equal to the heat added to the system minus the work done by the system:

ΔU = Q - W

Where ΔU is the change in internal energy, Q is the heat added to the system, and W is the work done by the system.

In this case, the change in internal energy (ΔU) is given as 246 kJ and the heat added (Q) is given as 627 kJ.

ΔU = Q - W

246 kJ = 627 kJ - W

To find the work done by the system, we rearrange the equation:

W = Q - ΔU

W = 627 kJ - 246 kJ

W = 381 kJ

Therefore, the work done by the system is 381 kJ.

This means that 381 kJ of energy is transferred from the system to the surroundings in the form of work. The positive sign indicates that work is being done by the system.

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Answer:

plasma

Explanation:

Answer:

The answer is D Plasma

If Aldebaran were to explode tonight then we will be able to see this explosion on the Earth in approximately 65 years. A light-year is a distance that light travels in one (1) year.

A light-year can be defined as a unit equal to the distance that light needs to travels in one (1) year on the Earth.

One light-year can be considered as a unit that equates to approx. 9.7 trillion kilometers (km) or 5.9 trillion miles.

In consequence, a light-year is a distance unit instead of a unit of time, and this unit was developed by Otto Ule.

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