A motorist travels 130 km in 2 hours.

Answer:

Quantum mechanics is the science of the very-small things. It explains the behavior of matter and its interactions with energy on the scale of atomic and subatomic particles. By contrast, classical physics explains matter and energy only on a scale familiar to human experience, including the behavior of astronomical bodies such as the Moon. Classical physics is still used in much of modern science and technology. However, towards the end of the 19th century, scientists discovered phenomena in both the large (macro) and the small (micro) worlds that classical physics could not explain. The desire to resolve inconsistencies between observed phenomena and classical theory led to two major revolutions in physics that created a shift in the original scientific paradigm: the theory of relativity and the development of quantum mechanics. This article describes how physicists discovered the limitations of classical physics and developed the main concepts of the quantum theory that replaced it in the early decades of the 20th century. It describes these concepts in roughly the order in which they were first discovered. For a more complete history of the subject, see History of quantum mechanics. Light behaves in some aspects like particles and in other aspects like waves. Matter—the "stuff" of the universe consisting of particles such as electrons and atoms—exhibits wavelike behavior too. Some light sources, such as neon lights, give off only certain specific frequencies of light, a small set of distinct pure colors determined by neon's atomic structure. Quantum mechanics shows that light, along with all other forms of electromagnetic radiation, comes in discrete units, called photons, and predicts its spectral energies (corresponding to pure colors), and the intensities of its light beams. A single photon is a quantum, or smallest observable particle, of the electromagnetic field. A partial photon is never experimentally observed. More broadly, quantum mechanics shows that many properties of objects, such as position, speed, and angular momentum, that appeared continuous in the zoomed-out view of classical mechanics, turn out to be (in the very tiny, zoomed-in scale of quantum mechanics) quantized. Such properties of elementary particles are required to take on one of a set of small, discrete allowable values, and since the gap between these values is also small, the discontinuities are only apparent at very tiny (atomic) scales. Many aspects of quantum mechanics are counterintuitive and can seem paradoxical because they describe behavior quite different from that seen at larger scales. In the words of quantum physicist Richard Feynman, quantum mechanics deals with "nature as She is—absurd".  For example, the uncertainty principle of quantum mechanics means that the more closely one pins down one measurement (such as the position of a particle), the less accurate another complementary measurement pertaining to the same particle (such as its speed) must become.  Another example is entanglement, in which a measurement of any two-valued state of a particle (such as light polarized up or down) made on either of two "entangled" particles that are very far apart causes a subsequent measurement on the other particle to always be the other of the two values (such as polarized in the opposite direction).  A final example is superfluidity, in which a container of liquid helium, cooled down to near absolute zero in temperature spontaneously flows (slowly) up and over the opening of its container, against the force of gravity.

Explanation:

hope this makes sense and helps :)

Answer:

Quantum mechanics is the science of the very-small things. It explains the behavior of matter and its interactions with energy on the scale of atomic and subatomic particles. By contrast, classical physics explains matter and energy only on a scale familiar to human experience, including the behavior of astronomical bodies such as the Moon. Classical physics is still used in much of modern science and technology. However, towards the end of the 19th century, scientists discovered phenomena in both the large (macro) and the small (micro) worlds that classical physics could not explain. The desire to resolve inconsistencies between observed phenomena and classical theory led to two major revolutions in physics that created a shift in the original scientific paradigm: the theory of relativity and the development of quantum mechanics. This article describes how physicists discovered the limitations of classical physics and developed the main concepts of the quantum theory that replaced it in the early decades of the 20th century. It describes these concepts in roughly the order in which they were first discovered. For a more complete history of the subject, see History of quantum mechanics. Light behaves in some aspects like particles and in other aspects like waves. Matter—the "stuff" of the universe consisting of particles such as electrons and atoms—exhibits wavelike behavior too. Some light sources, such as neon lights, give off only certain specific frequencies of light, a small set of distinct pure colors determined by neon's atomic structure. Quantum mechanics shows that light, along with all other forms of electromagnetic radiation, comes in discrete units, called photons, and predicts its spectral energies (corresponding to pure colors), and the intensities of its light beams. A single photon is a quantum, or smallest observable particle, of the electromagnetic field. A partial photon is never experimentally observed. More broadly, quantum mechanics shows that many properties of objects, such as position, speed, and angular momentum, that appeared continuous in the zoomed-out view of classical mechanics, turn out to be (in the very tiny, zoomed-in scale of quantum mechanics) quantized. Such properties of elementary particles are required to take on one of a set of small, discrete allowable values, and since the gap between these values is also small, the discontinuities are only apparent at very tiny (atomic) scales. Many aspects of quantum mechanics are counterintuitive and can seem paradoxical because they describe behavior quite different from that seen at larger scales. In the words of quantum physicist Richard Feynman, quantum mechanics deals with "nature as She is—absurd".  For example, the uncertainty principle of quantum mechanics means that the more closely one pins down one measurement (such as the position of a particle), the less accurate another complementary measurement pertaining to the same particle (such as its speed) must become.  Another example is entanglement, in which a measurement of any two-valued state of a particle (such as light polarized up or down) made on either of two "entangled" particles that are very far apart causes a subsequent measurement on the other particle to always be the other of the two values (such as polarized in the opposite direction).  A final example is superfluidity, in which a container of liquid helium, cooled down to near absolute zero in temperature spontaneously flows (slowly) up and over the opening of its container, against the force of gravity.

Explanation:

if you need anything gust let me know :)

The solution to this task is f00king Dis.

True, parallax is the apparent change in location of an object due to the motion of the observer.

Parallax is a technique used in astronomy to measure the distance of nearby celestial objects, such as stars or planets, from Earth. This phenomenon occurs because the position of an object appears to change when viewed from different vantage points. The apparent change in location is due to the motion of the observer and not the actual movement of the object being observed.

For example, when you hold your thumb up in front of your face and close one eye, then switch to the other eye, your thumb appears to shift in position against the background. This shift is a result of the change in the observer's perspective, and it illustrates the concept of parallax. In astronomy, the observer's motion usually refers to the Earth's movement around the Sun, which causes nearby stars to appear to shift against the more distant background stars.

By observing this apparent change in position and knowing the baseline (the distance between the two observation points), astronomers can use trigonometry to calculate the distance to the celestial object. Parallax is an essential tool in the field of astrometry, helping astronomers understand the universe's scale and structure.

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Answer:

The combined gas law states that the pressure of a gas is inversely related to the volume and directly related to the temperature. If temperature is held constant, the equation is reduced to Boyle's law. Therefore, if you decrease the pressure of a fixed amount of gas, its volume will increase.

Explanation:

Hope this helps

The behavior of a wildfire is typically described by b) intensity and spread.

Wildfire behavior refers to the way the fire responds to the various factors that influence its spread and movement. The behavior of a wildfire is typically described by two main characteristics, which are intensity and spread. Intensity refers to the heat output of the fire and its potential for ignition and combustion. Spread, on the other hand, is the rate at which the fire is moving and how far it has spread. The intensity of a wildfire is influenced by several factors, including the type of fuel, weather conditions, and topography.

High-intensity wildfires tend to occur in areas with abundant and dry fuel, high temperatures, low humidity, and high winds, they can be dangerous and difficult to control, and they often result in significant damage to the environment and human communities. Spread is influenced by the same factors as intensity, as well as the presence of firebreaks, the availability of resources, and the tactics used by firefighting personnel. The speed and direction of the fire can vary greatly depending on the surrounding conditions, and it is important to monitor and assess these factors in order to manage the fire effectively. So therefore the behavior of a wildfire is typically described by b) intensity and spread.

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Answer:

C

Explanation:

When trash accumulates, astronauts manually squeeze it into trash bags, temporarily storing almost two metric tons of it for relatively short durations, and then send it away in a departing commercial supply vehicle, which either returns it to Earth or incinerates it during reentry through the atmosphere.

The frequency heard by car A is determined as 398.4 Hz.

The frequency heard by car A is determined by applying the following equation.

f = fs(v - v₀) / (v - vs)

where;

f = 395(343 - 19.2) / (343 - 22)

f = 395(1.0087)

f = 398.4 Hz

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Water slows down neutrons that are leaving nuclear processes quickly. As the water warms up, steam is produced. Electricity is generated by the turbine that the steam turns.

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Answer:

A simple microscope is an optical instrument we use for the magnification of small object to get a clear image or vision.It is a convex lens having a short focal length.

Answer:

Optical instruments is an instrument which is used in lens to make the image of an image

The mixture of solids that can be separated by using both shape and size is oval beads, marbles, and dice (option B).

A mixture in chemistry is any substance that is made up of two or more constituents that can easily be separated using physical means.

Mixtures, unlike compounds, contain substances that retain their chemical composition since there is no chemical bonding.

This makes the components of a mixture separable by physical techniques such as heating, magnetism etc.

Therefore, the mixture of solids that can be separated by using both shape and size is oval beads, marbles, and dice because they are all of different and unique shapes and sizes.

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Answer:

72n

Explanation:

The pressure in the narrow section of the pipe is 22.8 kPa.

What is Pressure?

Pressure is defined as the force per unit area applied on an object in a direction perpendicular to the surface of the object. It is measured in units of Pascal (Pa) in the International System of Units (SI), which is equivalent to one Newton per square meter (N/m²).

\($A_1V_1 = A_2V_2$\)
We know that \($V_1 = 5.00$\) m/s, \($A_1 = \pi(0.100\text{ m}/2)^2 = 0.00785$\) m², and \($A_2 = \pi(0.080\text{ m}/2)^2 = 0.00503$ m$^2$\). Substituting these values into the continuity equation gives:
\($0.00785 \times 5.00 = 0.00503 \times V_2$\\$V_2 = 12.4$ m/s\\$\frac{1}{2}\rho V_1^2 + P_1 = \frac{1}{2}\rho V_2^2 + P_2$\)
Substituting the given values, we get:
\($\frac{1}{2} \times 680 \times 5.00^2 + 200 \text{ kPa} = \frac{1}{2} \times 680 \times 12.4^2 + P_2$\\$P_2 = 262 \text{ kPa}$\)
Therefore, the pressure in the narrow section of the pipe is 262 kPa.

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Answer:

Q

Explanation:

To know which symbol defines the wavelength, we must know the definition of wavelength.

Wavelength can be defined as the distance between two successive crests (i.e the highest part) or troughs (the lowest part) of a wave.

Considering the diagram given above, Q shows the distance between two successive crests (i.e the highest part) of the wave. Therefore, Q is the wavelength of the wave given in the diagram above.

Answer:

charge to uspe bro +positive hi rhega

Answer is:

E= V/d = 20.0Volts/ 0.020m = 1000 N/C

Given:

The given value is \((1.0004)^{\frac{1}{2}}\).

To find:

The value of the given expression by using the Binomial approximation.

Explanation:

We have,

\((1.0004)^{\frac{1}{2}}\)

It can be written as:

\((1.0004)^{\frac{1}{2}}=(1+0.0004)^{\frac{1}{2}}\)

\((1.0004)^{\frac{1}{2}}=1+\dfrac{1}{2}\times 0.0004\)      \([\because (1+x)^n=1+nx]\)

\((1.0004)^{\frac{1}{2}}=1+0.0002\)

\((1.0004)^{\frac{1}{2}}=1.0002\)

Therefore, the approximate value of the given expression is 1.0002.

Answer:

4 kg

Explanation:

because when you go the moon you lose 6 times your weight because of the gravitational pull

Answer:

16.3333333 newtons

Explanation:

on earth it would 98 newtons

When compared to winds at the surface, winds at 2,000 feet are typically higher due to the absence of friction.

At the surface, winds are affected by friction with the Earth's surface, which slows them down and causes them to move in a more turbulent and erratic fashion. However, as winds move up in altitude, they encounter less and less friction, allowing them to increase in speed and flow in a more uniform and predictable manner.
While friction may still have some influence on winds at 2,000 feet, it is not as significant as at the surface. Therefore, winds at this altitude tend to move more smoothly and follow a more consistent path, often perpendicular to the isobars (lines of equal pressure) on a weather map. This makes them useful for aviation purposes, as pilots can use this information to plan their flight paths and take advantage of favorable tailwinds or avoid dangerous crosswinds.
In contrast, winds at the surface are more affected by local topography, temperature gradients, and other factors that can cause them to vary widely in direction and speed. Overall, winds at 2,000 feet are an important component of the Earth's atmospheric circulation system, and understanding their behavior is essential for predicting weather patterns and ensuring safe air travel.

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The magnitude of the force exerted on the 0.02 C point charge in a 400 N/C electric field is 8 N. It is important to note that the force is a vector quantity, meaning it has both magnitude and direction. In this case, the direction of the force would depend on the polarity of the charge and the direction of the electric field.

The magnitude of the force exerted on a point charge in an electric field can be determined using the formula:

F = q * E

Where: F is the force exerted on the charge, q is the magnitude of the charge, and E is the magnitude of the electric field.

In this case, the magnitude of the electric field is given as 400 N/C, and the magnitude of the point charge is 0.02 C.

Substituting these values into the formula, we get:

F = (0.02 C) * (400 N/C)

Calculating this, we find:

F = 8 N

Therefore, the magnitude of the force exerted on the 0.02 C point charge in a 400 N/C electric field is 8 N. It is important to note that the force is a vector quantity, meaning it has both magnitude and direction. In this case, the direction of the force would depend on the polarity of the charge and the direction of the electric field.

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The length of a pendulum needed to have a period of 1 second is 0.24 meters or 24 centimeters.

A pendulum represents Simple Harmonic Motion,

The formula for the time period of a pendulum is

T = 2π √l/√g

Where l is the length of the pendulum and g is the acceleration due to gravity on Earth.

We are given that a pendulum has a period of 1 second

So,

1= 2π √l/√g

Squaring both sides

1 = 4π^2√ l/√g

l = g/ 4 π^2

l = 0.24 m

Hence, the length of a pendulum needed to have a period of 1 second is 0.24 meters or 24 centimeters.

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Answer:

It is defined as an astronomical phenomenon which occurs when one spatial object comes within the shadow of another spatial object.

Answer:

1. Attacking the person

2. Stress fractures

Explanation:

If this helps this is on my opinion and I need do my best to help you:)

Answer:

0.75km/min

Explanation:

I haven't learnt physics at all but I'll try

57336 - 57321 = 15km (Difference)

8.50 am - 8.30 am = 20 minutes (Difference)

If the car odometer adds up 15km every 20 minutes...

20 mins = 15km

1 min = 15 ÷ 20 = 0.75km

Explain why scientists replace an old scientific model with a new model.

Include an example from Physics in your answer.

A scientific model is created to understand the concepts and explain the reason behind unexplained observations.

But the scientific models cannot explain all the unexplained observations.

When another scientific model which could explain some more observations than the previous model.

This new model replaces the old one.

 One such example in physics is geocentric and heliocentric models.

The geocentric model was based on the principle that all celestial bodies revolve around the earth as its center.

But this model failed to explain some planets move backward instead of forward.

The heliocentric model was based on the principle that all planets revolve around the sun as its center including earth.

 This model was able to resolve the backward and forward motion dilemma.

That is why heliocentric replaced the geocentric model.

\(\boxed{\huge \text{Hope this helps! :)}}\)

\(\huge \text{Happy president's day! :)}\)

-InLoveWithNature-

The model was used by scientists to predict the results of their investigations. The data frequently did not support their forecasts. This required a modification to the model.

The contemporary atomic model emerged as a result of numerous scientists building on one another's research.

Creating a physical, mental, or mathematical model of a genuine occurrence that is challenging to see firsthand is known as scientific modeling.

In a range of scientific disciplines, from chemistry and science to ecology and also the Earth sciences, scientific models are employed to explain and forecast the behavior of real things or systems.

Though modeling is an essential part of contemporary science, scientific models are, at best, approximations rather than perfect representations of the systems and things they represent. As a result, scientists are always trying to enhance and improve models.

Scientific modeling has a variety of goals. Some models, which are frequently developed from experimental data, are being used mainly to visualize an object or system, such the three-dimensional dbl model of DNA.

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It is to be noted that Cynthia with her device, is most likely trying to demonstrate "Newton's second law of motion" (Option D).

Note that Cyntia is carrying out a sort of experiment that involves various items with different masses while comparing them to how fast they can travel.

Recall that Newton's Second Law of Motion (Force) indicates that the acceleration of an entity depends on the mass of the object and the amount of force applied.

Given that Cyntia's experiment is in this line, it is therefore correct to state that Cynthia, using her device, is most likely trying to demonstrate "Newton's second law of motion"

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Full Question:

Cynthia constructed a small device called a catapult shown below.

The catapult is able to accelerate objects in order to propel them in a certain direction. After placing a small toy in the end of the spoon, she pulls back with her finger on the tip of the spoon to a point and releases.

She uses toys of the same shape and size, but different masses and compares how much each travels when released. Which of the following is Cynthia most likely trying to demonstrate with her device?

A. Newton's universal law of gravitation

B. Newton's third law of motion

C. Newton's first law of motion

D. Newton's second law of motion

Cost to run a 1200 W kettle that is in operation for 3.0 minutes is $ 0.00988

The Energy is P = E/t, in which P means electricity, E means strength, and t manner time in seconds. This formula states that power is the consumption of energy consistent with a unit of time.

Calculation:-

power = 1200 W = 1.2 kW

time = 3 minutes = 3/60

          = 0.05 hr

energy = power × time

            =  1.2× 0.05

            = 0.06 kWh

cost = $0.1646 × 0.06

    =  $ 0.00988

Energy is defined because of the “ability to do paintings, that's the ability to exert a force inflicting displacement of an object.” no matter this confusing definition, its which means is very simple: strength is just the force that causes matters to move. electricity is split into two sorts: potential and kinetic.

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With current technology, it is not feasible to travel 1 light-year within a human lifetime.

The speed of light in a vacuum is approximately 299,792 kilometers per second (km/s). In one year, light can travel about 9.46 trillion kilometers. This distance is defined as one light-year.

Currently, the fastest spacecraft ever launched by humans, the Parker Solar Probe, can reach speeds of about 430,000 km/h (270,000 mph). At this speed, it would take the probe tens of thousands of years to travel just one light-year.

To put it into perspective, the nearest star to our solar system, Proxima Centauri, is about 4.24 light-years away. At our current technological capabilities, it would take an impractical amount of time to reach even the closest star.

Efforts are being made to develop faster propulsion technologies, such as advanced ion thrusters and potential breakthrough concepts like warp drives or solar sails, but currently, they remain purely speculative or in the early stages of development.

For now, interstellar travel at a significant fraction of the speed of light remains a topic of scientific and engineering exploration for future generations.

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Answer:

y

Explanation:

godfydufufufjfhduddjgjxhdudhdufjfufigjfhfu

The final speed of cyclist is 12.27m/s

The following question can be solved using formulas of Motion on one dimension as the motion is in one dimension

We will use the formula

\(v^2-u^2=2aS\)

where v is the final velocity

u is the initial velocity

a is the acceleration of the boat

s is the distance in meters

v^2 = 2 x a x S

       = 2 x 46 x a

v^2=92a

v=\(\sqrt{92a}\)

where a is the acceleration

Now using the formula v= u+ at

and putting value of v in the equation

\(\sqrt{92a}\)=a x7.5

squaring both sides,

92a=56.25a^2

a=92/56.25=1.64 m/s^2

Now we know that v= 7.5 a=7..5 x 1.64 =12.27m/s

Hence her final speed is 12.27m/s

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