what causes wind to flow ?​

The crate's potential energy can be calculated by multiplying its mass, the acceleration due to gravity, and the height. In this case, the potential energy is found to be 26,460 Joules.

Given:

Mass of the crate (m) = 180 kg

Height (h) = 15 m

Acceleration due to gravity (g) = 9.8 m/s²

Using the formula for potential energy:

Potential Energy (PE) = mass * acceleration due to gravity * height

Substituting the given values:

PE = 180 kg * 9.8 m/s² * 15 m

Calculating the product:

PE = 26,460 kg·m²/s²

Since the unit of potential energy is Joules (J), we can rewrite the result:

PE = 26,460 J

Therefore, the crate's potential energy at a height of 15 m is 26,460 Joules.

The calculation involves multiplying the mass (180 kg), the acceleration due to gravity (9.8 m/s²), and the height (15 m) together to obtain the potential energy in units of Joules. The result, 26,460 J, represents the amount of energy the crate possesses due to its position above the reference point.

The potential energy can be interpreted as the ability of the crate to do work or be converted into other forms of energy. In this case, it is the energy associated with the height of the crate above the ground level.

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The purpose of an airbag in an automobile is to make your momentum change occur over a shorter time during a collision, Option (c).

The airbag is a safety system in cars that is designed to inflate when a car is involved in a collision, reducing the impact of the collision on the driver and passengers. Airbags are designed to provide a cushioning effect, which reduces the force applied to the driver or passenger during a collision. The airbag system works together with the seat belt system to provide the best possible protection in case of a collision.

The purpose of an airbag in an automobile is primarily to make your momentum change occur over a shorter time during a collision.

When a collision occurs, the airbag inflates rapidly to provide a cushioning effect and help absorb the energy of the impact. By doing so, the airbag increases the time it takes for your momentum to change during the collision. This increase in time reduces the force and impulse experienced by your body, minimizing the risk of severe injuries. The airbag does not directly reduce your speed before a collision but rather provides a protective barrier during the impact.

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Given that the angular speed of the 27-inch-diameter tire is 5π radians per second. We need to find out the speed at which the cyclist is traveling.

The formula that relates angular speed, linear speed and radius of rotation is given as:v = rωwhere,v is the linear speed,ω is the angular speed andr is the radius of rotation.Since the diameter of the tire is 27 inches, the radius is 27/2 = 13.5 inches = 1.125 feet.Substituting the values in the above formula,v = rωv = (1.125) × (5π)v = 5.625π

The speed at which the cyclist is traveling when his 27-inch-diameter tires are rotating at an angular speed of 5π radians per second is 5.625π feet per second.

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The absolute refractory period, a crucial part in regulating the directionality of action potential propagation, is the brief period immediately following an action potential during which another action potential cannot be fired.

This absolute refractory period ensures that action potentials can only propagate in one direction; once an action potential is generated, its propagation is halted and cannot restart in reverse due to the absolute refractory period. This refractory period prevents the action potential from traveling in both directions, promoting the forward-only motion of the action potential.

Moreover, the absolute refractory period also ensures that once the action potential is generated, it progresses along the axon and does not become localized or fragmented. Thus, the presence of the absolute refractory period is essential for preventing the action potential from depolarizing the neuron in a chaotic manner and ensures proper and efficient transmission.

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Answer:

1440÷12=120

Explanation:

because u have to divide the mitre with the 12 m

Answer:

elementary particles

Explanation:

Matter is composed of elementary particles i.e. quarks and leptons.

Matter is composed of elementary particles which is called quarks and leptons. Quarks consist of protons, neutrons and electrons. All observable matter is made up of up quarks, down quarks and electrons.

Lepton is an elementary particle consist of half-integer spin that does not undergo strong interactions. Leptons exist on two main classes i.e. charged leptons, and neutral leptons. Electron, electron neutrino, muon, muon neutrino, tau and tau neutrino are the six types of leptons.

The minimum thickness of the quarter waveplate made from this polymer is 316 μm.

To find the minimum thickness of a quarter waveplate (QWP) made from a polymer with a given birefringence, we can use the following formula:

Thickness = λ / (4 × Δn)

Where:

Thickness is the minimum thickness of the QWP.

λ is the wavelength of light.

Δn is the birefringence of the material.

Given:

λ = 632 nm (converted to meters: 632 × \(10^{-9\) m)

Δn = 5 × \(10^{-4\)

Substituting the given values into the formula:

Thickness = (632 × \(10^{-9\) m) / (4 × 5 × \(10^{-4\))

Simplifying the expression:

Thickness = (632 × \(10^{-9\) m) / (20 × \(10^{-4\))

= (632 × \(10^{-9\) m) / (2 × \(10^{-3\))

= (632 × \(10^{-9\) m) / (2 × \(10^{-3\))

= 316 × \(10^{-6\) m

= 316 μm

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Answer:

A pair of scissors used to cut a piece of cloth has blades longer than the handles so that the blades move longer on the cloth than the movement at the handles.

While shears used for cutting metals have short blades and long handles because as it enables us to overcome large resistive force by a small effort.

Given what we know about the Kepler space program, we know that the astronomers discovered that Earth-sized planets are more common than we imagined.

Kepler was launched with the intention of getting a closer look at other planets outside of our solar system using enhanced photometrics.

The idea behind this launch was to discover more Earth-sized planets, preferably within the habitable zone of their central star.

What this mission showed astronomers, is that Earth-sized planets are more common than we could have imagined, Kepler proved this by finding over 2,662 planets to date.

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Formula: s = d/t

s = speed

d = distance

t = time

Solve using the values we are given.

s = 300/40

s = 7.5m/s

Best of Luck!

Answer:

7.5 m/s

Explanation:

Along with your family, plan nutritious meals, or establish a weekly healthy potluck at work. I don't enjoy exercising. Discard the outdated idea that exercising involves weightlifting at a gym.

The six fundamental lifestyle habits for a long, good health include sleeping enough, eating a good food, exercising, keeping a healthy weight, quitting smoking, and drinking in moderation.

Walking, cycling, skating, sports, active recreation, and play are all common methods to be active that anyone may do for fun and at any ability level. It has been demonstrated that regular exercise helps control and prevent noncommunicable diseases like diabetes, heart disease, stroke, and a number of malignancies.

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The difference is 920nm.

The wavelength can be defined as the separation between wave crests. Additionally, a wide variety of objects move in waves, including light, the earth or ground, water, strings, air, and sound waves. Furthermore, we use the Greek letter lambda to denote the wave's wavelength. In addition, the wave's wavelength is determined by dividing its velocity by its frequency. Additionally, we employ meters (m), which is the unit used to indicate wavelength in meters.

Positive interference is produced by a bright fringe, and the wavelength is always multiple.

The difference at the center fringe is (460 nm)(0) = 0.

The difference for the first maximum is (460 nm)(1) = 460 nm.

The difference for the second maximum is (460 nm)(2) = 920 nm.

As a result, the difference for maxima n is (460 nm) (n)

Since C is on the second maximum in the image that was submitted, the difference is stated as (460 nm)(2) = 920 nm.

Consequently, the screen's central dot on the fringe E to the left slit is 920 nm.

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Static electricity is not useful as a power source primarily because it releases all of its energy at once rather than providing a continuous and controlled flow of electrical energy. The correct answer is B.

When static electricity is discharged, such as in a spark or a sudden discharge of stored charge, it happens in a rapid and uncontrolled manner, resulting in a brief burst of energy rather than a steady and sustained flow.

Power sources typically require a continuous and controllable flow of electrical energy to be useful for various applications. Static electricity, in its nature, does not provide this continuous flow but instead releases energy in an instantaneous manner. Therefore, it is not suitable for most practical power needs and applications.

Option A is not correct because electrons can be transferred in bursts of static electricity. Option C is not correct because static electricity is a real form of electricity, even though it has unique characteristics. Option D is not correct because static electricity can occur in various circumstances, not just in lightning.

Therefore, Static electricity is not useful as a power source primarily because it releases all of its energy at once rather than providing a continuous and controlled flow of electrical energy. The correct answer is B.

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The higher the value of the coefficient of friction, the greater the resistance to sliding. A high coefficient of friction indicates an increased resistance to sliding, making it more difficult for objects to slide against each other.


The coefficient of friction is a measure of how much frictional force exists between two objects when they are in contact with each other. This value is unitless and can range from 0 (no friction) to values greater than 1 (high friction). When the coefficient of friction is high, it means that the objects have a strong resistance to sliding against each other.

This is because a higher coefficient of friction corresponds to a higher frictional force acting against the motion of the objects. In practical terms, this means that it takes more force to make the objects slide against one another, which may be desirable in some situations, such as in the design of brakes or shoe soles, where a strong grip is necessary.

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The lines of iron fillings will be attracted towards the poles of the magnet on the paper. The fillings gets sticked on the magnet. The glass or plastic will stop the passage of the magnetic lines of force .

Magnetic field lines are lines of force generated by a strong magnetic field. For a bar magnet, the magnetic south pole and north pole are having stronger magnetic fields than the middle part.

When magnetically susceptible materials comes in contact with a magnet they gets attracted to the poles of the magnet. The fields lines of the material gets aligned parallel to the applied field.

Some materials such as paper and glass are not showing magnetic properties. Hence, they can stop the passage of magnetic field lines. If we place a glass or paper in between the poles of a two magnets, they will stick to the glass from both ends due to the attraction to the opposite pole.

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Answer:

800 years ?? it should be

Given, Speed of the sound, v=675 m/s

The wavelength of the wave, λ=15 m

Relation between speed, wavelength, and frequency of a wave is given by

Where f is the frequency of the sound.

On substituting the known values,

Which gives us,

Therefore the frequency of the sound in the given medium is 45 Hz.

(a) The kinetic energy of Foboess when he was 30.0 m from the water's surface is  63,504 J.

(b) The speed of Forboess at that moment is 42 m/s.

The kinetic energy of Foboess when he was 30.0 m from the water's surface is calculated by applying the principle of conservation of energy.

K.E = ΔP.E

where;

ΔP.E = mg (h1 - h2 )

where;

The kinetic energy is calculated as follows;

K.E =  ΔP.E = mg (h1 - h2 )

ΔP.E = 72 x 9.8 (120 - 30 )

ΔP.E =  63,504 J

The speed of Forboess at that moment is calculated as;

v = √ 2g(h1 - h2 )

v = √ ( 2 x 9.8 x (120 - 30 )

v = 42 m/s

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Answer:

The answer is option A.

You speed up 8 m/s every second

Hope this helps you

Explanation:

Find an energy is E =mgh, so E = 45*10*19=8550j

Answer:

The acceleration of the plane is 35.6 meters per square second.

Explanation:

By Newton's Laws of Motion, we know that force (\(F\)), in newtons, is directly proportional to acceleration (\(a\)), in meters per square second. That is:

\(F \propto a\)

If four engines are running simultaneously and each produce the same force, then we find that acceleration of the plane is:

\(a_{T} = 4\cdot \left(8.9\,\frac{m}{s^{2}} \right)\)

\(a_{T} = 35.6\,\frac{m}{s^{2}}\)

The acceleration of the plane is 35.6 meters per square second.

Answer:

im not sure, but i think...

Explanation:

the harpy eagle???

Answer:

400 or 500

Explanation:

a) Object distance < 20 cm, b) Object distance > 20 cm, c) Object distance < 20 cm, d) Object distance > 20 cm, e) Object distance > 20 cm, f) Object distance < 20 cm.

a) For an image to be larger than the object, the object distance (d_o) must be less than the focal length (f), so d_o < 20 cm.
b) For an image to be smaller than the object, d_o > 20 cm.
c) For an image to be upright (virtual), d_o < 20 cm.
d) For an image to be inverted (real), d_o > 20 cm.
e) For a real image, d_o > 20 cm.
f) For a virtual image, d_o < 20 cm.
In summary, when the object is closer to the lens than the focal length (20 cm), the image will be larger, upright, and virtual. When the object is farther than the focal length, the image will be smaller, inverted, and real.

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Answer:

solar energy

Explanation:

Photovoltaics solar energy is a clean ,renewable source of energy that uses solar radiation to produce electricity

While pulling the speed is 37.24 m/s and distance before 70.76 m

Acceleration due to gravity

a = 9.8 m/s2

a. by the equation of motion

V = U + at

=  0 + (9.8 m/s2) ×(3.8 s)

= 37.24 m/s

b. distance fallen

S = ut + (1/2)at

= 0 + (1/2)×9.8×3.82

= 70.76 m

A parachute acts like a wing on an airplane though it acts with the same force as a human when falling. The T-11's main canopy uses a unique deployment sequence to reduce shock and canopy vibration when opening. The T-11 is designed for an average descent velocity of 19 feet per second for the 95th percentile service member, compared to 24 feet per second for the T-10C.

Even if the main parachute fails he can use his backup parachute to land. There are even tactics you can use to increase your chances of surviving a free fall to Earth if your reserves also fail. So if you have two parachutes of the same size and shape but different materials and one is heavier than the other the heavier parachute will fall faster.

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A strong magnetic field prevented the creation of charged particles or ions.

This is because the magnetic field exerts a force on charged particles, causing them to move in a circular path around the field lines, which in turn prevents them from combining and forming new particles or ions.

A strong magnetic field can have various effects on the physical and chemical processes occurring within a system, and can sometimes prevent the creation or modification of certain materials or structures.

One example of this is in the field of material science and engineering, where magnetic fields can be used to control the growth and alignment of crystalline structures in materials.

In some cases, a strong magnetic field can prevent the creation of certain materials altogether.

For example, when attempting to produce graphene using chemical vapor deposition (CVD), a strong magnetic field can disrupt the growth process and prevent the formation of the desired structure.

This is because the magnetic field can affect the movement and orientation of the precursor molecules, leading to a non-uniform growth pattern and the formation of defects in the graphene lattice.

Similarly, in certain chemical reactions, a strong magnetic field can alter the rate and outcome of the reaction, making it difficult or impossible to create certain products.

This is because the magnetic field can affect the spin states of the reacting molecules and alter their reactivity and selectivity.

Overall, a strong magnetic field can have significant and sometimes unpredictable effects on the creation and modification of materials and chemicals, and must be carefully considered and controlled in many research and industrial processes.

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C) Move the lens closer to the sensor or the film . Option (c) is the right           answer.

Assume that we are trying to take a picture or photograph of a moving object

as we know, the f-stop value tells us about the color of the image. That means it actually depicts that how dark is the image. would be. in simple words, it determines the amount of light that will be able to enter to the eye. Therefore, option a,b are incorrect.

Now the focus length of the camera is always fixed. Now let our object is moving away from the lens, then to keep it in focus, the camera must be moved closer to the object. This step is essential to keep focal length constant.

Hence, the correct option is (c).

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