PLEASE HELP WILL GIVE BRAINLIEST!!! DUE SOON!! GIVE ME 2 REASONS WHY

why is water further away from the shore colder the further you go?

Answer:

\(the \: net \: force = \: 50 - 15 = 35.\)

Answer:

Net force is going to be GREATER FORCE - LESS FORCE if they are working in opposite direction

so,

         50N - 15N = 35N

Answer:

Observations of white dwarf supernovae

Explanation:

N-o-t t-h-e y-o-l-k.

The event that marks the end of a star's evolutionary life before becoming a white dwarf is a planetary nebula. So, option E is correct.

A planetary nebula is characterized by cosmic rays of gas and dust surrounding a dying star. This dying star becomes a white dwarf after the complete depletion of hydrogen in the core.

It gets its name from a scientist who described the gases to be looking like two planets around a dying star. Thus, it's called planetary nebulae. This marks the final stage of a dying star that becomes a white dwarf. It consists of the outer layers of the star.

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Answer:

60 - 45 = A. 15

Explanation:

Subtracted because the plane mirror at an angle is incidence of 60°, so then in order to find the value it would be 60-45 and not adding it or dividing and multiplying to find the value thus the answer is 15.

60 - 45 = A. 15. Subtracted because the plane mirror at an angle is incidence of 60°, so then in order to find the value it would be 60-45 and not adding it or dividing and multiplying to find the value thus the answer is 15.

A flat or highly polished surface called a plane mirror reflects light or waves to create an image. It is a polished, smooth surface that creates a virtual representation of the actual object.

A plane mirror is a surface on which an image can only be produced by at least two light beams. The intersection of these two beams can occur inside the mirror or appear to occur somewhere behind the mirror.

The image that follows illustrates how an object appears when viewed via a plane mirror.

Therefore, 60 - 45 = A. 15. Subtracted because the plane mirror at an angle is incidence of 60°, so then in order to find the value it would be 60-45 and not adding it or dividing and multiplying to find the value thus the answer is 15.

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The magnitude of the external magnetic flux through the wire loop decreases, and there is a clockwise current induced in the loop (as seen from the left). Thus, the correct options are B and B.

Using Lenz's law and the right-hand rule, we can determine the direction of the induced current in the wire loop in different scenarios. When the switch is open, there is no magnetic flux through the wire loop, so there is no induced current.

Immediately after the switch is closed, the magnetic field through the wire loop increases. According to Lenz's law, the induced current will oppose this change. Using the right-hand rule, the induced current direction in the wire loop will be counterclockwise (as seen from the left).

When the switch is reopened, the external magnetic flux through the wire loop decreases (B). Lenz's law predicts that the induced current will oppose this change. Using the right-hand rule, we find that there will be a clockwise induced current in the loop (B) (as seen from the left).

So, the correct responses are B and B.

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Answer:

True

Explanation:

Answer:TRUE

Explanation:

The heating of air inside the balloon causes the volume to expand (Charles's Law), resulting in a decrease in the pressure compared to the surrounding air (Boyle's Law).

Hot-air balloon flight can be explained by the combined principles of Charles's Law, Archimedes' Principle, and Boyle's Law.

Charles's Law states that the volume of a gas is directly proportional to its temperature, assuming the pressure remains constant. In the case of a hot-air balloon, the air inside the balloon is heated, causing the gas molecules to move faster and increase in temperature. As a result, the volume of the gas expands, leading to an increase in the volume of the balloon.

Archimedes' Principle states that an object immersed in a fluid experiences an upward buoyant force equal to the weight of the fluid displaced by the object. In the context of a hot-air balloon, the heated air inside the balloon is less dense than the surrounding cool air. The buoyant force acting on the balloon is equal to the weight of the air displaced by the balloon. This buoyant force is greater than the weight of the balloon itself and the payload, causing the balloon to rise.

Boyle's Law states that the pressure of a gas is inversely proportional to its volume, assuming the temperature remains constant. When the air inside the balloon is heated, the volume increases. As a result, the pressure inside the balloon decreases relative to the surrounding air pressure. The pressure difference creates a net upward force, contributing to the balloon's ascent.

In summary, the combined effects of Charles's Law, Archimedes' Principle, and Boyle's Law explain hot-air balloon flight. The heating of air inside the balloon causes the volume to expand (Charles's Law), resulting in a decrease in the pressure compared to the surrounding air (Boyle's Law). The buoyant force (Archimedes' Principle) acting on the less dense heated air allows the balloon to rise.

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1. a. A steel girder, still glowing as it is removed from its mold, would produce a **bright line spectrum**. This is because the intense heat causes the atoms in the steel to emit light at specific wavelengths. The high temperature excites the electrons in the atoms, and as they return to lower energy levels, they emit photons of specific energies, resulting in distinct bright lines in the spectrum.
b. Sunlight shining through our atmosphere (as seen from Earth's surface) would produce a **continuous spectrum**. The sunlight consists of a broad range of wavelengths, covering the entire visible spectrum. As it passes through Earth's atmosphere, which contains various gases, particles, and molecules, these components do not selectively absorb or emit specific wavelengths, resulting in a continuous distribution of colors in the spectrum.
c. The Orion Nebula, a hot, glowing cloud of thin gases, would exhibit an **emission line spectrum**. The gases in the nebula are energized by nearby stars, causing them to emit light at specific wavelengths characteristic of the elements present. The excited electrons in the gas atoms emit photons at discrete energies, creating bright lines in the spectrum corresponding to specific elements or molecular transitions.
2. Three regularities/trends observed in the planets of our solar system that support the solar nebula concept are:
a. **Orbital Plane Alignment**: Most planets orbit the Sun in a nearly flat plane known as the ecliptic. This alignment suggests that the planets formed from a rotating disk of gas and dust, as the rotation of the solar nebula would have caused material to flatten into a disk-shaped structure.
b. **Terrestrial and Jovian Planet Differences**: There is a clear distinction between the inner terrestrial planets (Mercury, Venus, Earth, and Mars) and the outer gas giant planets (Jupiter, Saturn, Uranus, and Neptune). The terrestrial planets are smaller, denser, and composed mainly of rocky material, while the gas giants are larger, less dense, and composed mostly of hydrogen and helium. This supports the idea that the solar nebula had different zones with varying compositions and temperatures, leading to the formation of different types of planets.
c. **Rocky Debris in Inner Solar System**: In the inner solar system, there are numerous rocky asteroids and comets, which are remnants from the early stages of planet formation. These bodies are predominantly found in the asteroid belt between Mars and Jupiter and the Kuiper Belt beyond Neptune. Their presence suggests that rocky material was abundant closer to the Sun, while the outer regions contained more gas and icy material.

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Time taken to slow down the speed will be 5 seconds.

Average acceleration of the bus, a = 1.8 m/s²

Initial velocity of the bus, u = 9.0 m/s

Final velocity of the bus, v = 0 m/s

According to the First Equation of the motion which relates the acceleration, velocity and time we can say that

v = u + at

v - u = at

0 - 9 = (-1.8) * t

9 = 1.8 * t

t = \(\frac{9}{1.8}\)

t = 5 s

Therefore 5 seconds will be required by the bus to slow down its speed from 9.0 m/s to 0.0 m/s

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Newton's Second Law of Motion states that the net force acting on an object is directly proportional to its acceleration. The proportionality constant, which is the object's mass, gives the equation ma = f (force equals mass times acceleration). This means that if a force is applied to an object with a certain mass, it will accelerate proportionally to the magnitude of the force.

Applying Newton's Second Law of Motion allows us to determine the force required to move an object of a certain mass a certain distance. We can also use it to calculate the acceleration of an object given its mass and the force acting on it. The second law states that the acceleration of an object is proportional to the force applied to it and inversely proportional to its mass. If the mass of the object remains constant, the acceleration produced is directly proportional to the force applied.

The second law also tells us that if a net force is acting on an object, it will accelerate in the direction of that force. This law can be used to explain the motion of objects in both linear and rotational motion. For example, when a bat hits a ball, the force of the bat on the ball causes it to accelerate, and the ball moves in the direction of that force. In summary, applying Newton's Second Law of Motion is a powerful tool for understanding the motion of objects and how they respond to forces acting on them.

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Answer: The waves are compressed as the item moves closer to you, so their wavelength is shorter.

Explanation:

Answer:

C

Explanation:

because the rod is positive, it'll attract the negatives. leaving the positive to stay in the back

When we convert 4900mm from two-step dimensional analysis it would be 490 cm and 5.59kL to 5923.667 quarts.

Dimensional Analysis is a technique for analysis where physical quantities are expressed in terms of their basic dimensions and is frequently applied when there is insufficient data to create accurate equations.

As given in the problem we have to convert

4900mm to cm

As we know that there  are 1000 mm in 1 m

1000 mm = 1 m

4900 mm = 4.9 m

1 m = 100 cm

4.9 m = 4.9×100

          =490 cm

As we have to convert 5.59kL to quarts

1 Kiloliter =  1056.69 US liquid quart

5.59kL    = 5.59 ×1056.69 quarts

               =5923.667 quarts

Thus, we converted 4900mm to 490 cm and 5.59kL to 5923.667 quarts.

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Answer:

approximately 1.74 million meters per second.

Explanation:

The maximum kinetic energy of a photoelectron emitted from a surface is equal to the work function of the surface, which is the minimum amount of energy required to remove an electron from the surface.

In this case, the work function of the nickel surface is 5.1 eV, so the maximum kinetic energy of the photoelectron is also 5.1 eV.

The kinetic energy of a moving particle is related to its speed by the equation:

KE = (1/2) * m * v^2

where KE is the kinetic energy, m is the mass of the particle, and v is the speed.

If we solve this equation for v and substitute in the values given in the question, we can find the maximum speed of the photoelectron:

v = sqrt(2 * KE / m)

v = sqrt(2 * 5.1 eV / 9.109e-31 kg)

v = 1.74e6 m/s

Thus, the maximum speed of the photoelectron emitted from the nickel surface is approximately 1.74 million meters per second.

Answer:

B. 44.1

Explanation:

We can use the equation y=1/2gt^2 to find the distance in the vertical direction, where y= distance in the vertical direction, g=acceleration due to gravity, and t=time

we only know acceleration due to gravity(9.8m/s^2),

plug in known variables,

y=1/2*9.8*t^2

we still need to plug in the time variable.

In order to do that, we an use the s=d/t equation and re arrange that formula to get: t=d/s, where t=time, d=distance, and s=speed.

plug in known variables,

t=60/20

t=3

now that we know the time, we can plug that into our original equation

y=1/2*9.8*3^2

simplify,

y=4.9*3^2

y=4.9*9

y=44.1m

Thus, B is your answer

The kinetic energy of a car with a mass of 1050kg and a velocity of 5m/s will be 13,125 joules or 13,125 kg⋅m2⋅s−2.

As we know, the formula to find the kinetic energy in a system is \(1/2 m v^{2}\) where m is the mass of the system and v is the given velocity at the moment. So , by putting the given data in the equation, we get :

⇒\(1/2mv^{2}\)

⇒1/2 x 1050 x 5 x 5

⇒525 x 25

⇒13,125

∴ The Kinetic energy of the car will be 13,125 Joules where joule is the SI unit of energy.

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The final velocity of the car is 1.33 m/s to the west.

The final velocity of the car is calculated by applying the principle of conservation of linear momentum.

m1v1 + m2v2 = m1v1' + m2v2'

where;

The final velocity of the car is calculated as

(1000 kg)(-8 m/s) + (900 kg)(6 m/s) = (1000 kg)(-1.4 m/s) + (900 kg)(v2')

-2,600 = -1400 + 900v2'

v2' = -1200/900

v2' = -1.33 m/s

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Answer:

yes

Explanation:

banked curve :

is a road that looks like the top part of a race track

its looks elevated

often seen in bicycle race track (velodrome)

Banking the curve can help keep cars from skidding. When the curve is banked, the centripetal force can be supplied by the horizontal component of the normal force.

sfuca

When an airplane travels 640 miles from Topeka to Houston in 3. 2 hours, going against the wind. The return trip is with the wind and takes only 2 hours. Then the rate of the airplane with no wind is 260 miles/hr, and the rate of the wind is 100 miles/hr

Let Va is the velocity of the airplane

Va is the velocity of the wind

When flying against the wind then

(Va+Vw)*(3.2 hours) = 640

3.2Va + 3.2Vw = 640

3.2Vw = 640 - 3.2Va

Vw = 200 - Va----------------(1)

When flying with the wind:

(Va-V)*(2 hours) = 640km

2Va - 2Vw = 640

Va - Vw = 320 ----------------(2)

Putting the value of VW in equation (2) we get

Va - (200-Va) = 320

2Va = 320 +200

2Va = 520

Va = 260

Putting this value in equation (2)

Vw =Va - 360

Vw = 100

Therefore the rate of the airplane with no wind is 260 miles/hr, and the rate of the wind is 100 miles/hr

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Steam, Heat Exchange, Natural Gas, Throttle The steam is extracted between the high and low pressure turbines at a pressure to be determined, which is then isobarically heat exchanged with the process hot water, exiting the heat exchanger as a saturated liquid. This liquid is then throttled to the condenser pressure and mixed with the fluid exiting the low-pressure turbine.

To calculate the power output of the system, the energy and mass balances for the process must be established. These balances can be used to calculate the mass flow rate of the natural gas, the mass flow rate of the steam, the heat input and the power output. In addition, the properties of the natural gas can be used to calculate the enthalpy of the inlet gas, the enthalpy of the steam, and the enthalpy of the inlet air.

The energy balance equation states that the total energy entering the system is equal to the total energy leaving the system. The mass balance equation states that the total mass entering the system is equal to the total mass leaving the system. From these two equations, the enthalpy of the steam and the mass flow rate of the natural gas can be calculated.

The heat input to the system is equal to the total enthalpy of the steam plus the enthalpy of the natural gas. The power output of the system is equal to the heat input multiplied by the efficiency of the generator. This can be used to calculate the power output of the system.

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The threshold that tells us the minimum we can hear is the threshold of audibility. The threshold that tells us the maximum we can hear is the threshold of pain or discomfort.

The threshold of audibility refers to the lowest sound intensity that can be detected by the human ear. It represents the minimum level of sound required for a person with normal hearing to perceive a sound stimulus. This threshold varies depending on the frequency of the sound.

On the other hand, the threshold of pain or discomfort is the highest sound intensity that the human ear can tolerate before experiencing pain or discomfort. It signifies the upper limit of sound levels that can be safely endured by the auditory system without causing damage. Beyond this threshold, exposure to excessively loud sounds can lead to hearing loss, ear damage, and other auditory problems.

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“The electric flux through a closed surface is equal to the net charge inside the surface divided by the physical constant. This law is a fundamental principle in electrostatics and is expressed mathematically as E.ds = Q/ε0.

Gauss’s Law for electric fields is a fundamental principle in physics, specifically in the study of electrostatics. The law describes the relationship between the electric flux and the distribution of electric charges in a given space. Simply put, it states that the electric flux through a closed surface is proportional to the total amount of electric charges inside the surface. In mathematical terms, the statement of Gauss’s Law for electric fields is as follows: E.ds = Q/ε0Here, E.ds represents the electric flux through a closed surface, Q represents the total electric charge enclosed within the surface, and ε0 is the physical constant known as the permittivity of free space. This equation can be used to calculate the electric field created by a given charge distribution, provided that the electric flux through a closed surface around the distribution is known.

Gauss’s Law for electric fields states that the electric flux through a closed surface is proportional to the net electric charge enclosed within the surface. This law is a fundamental principle in electrostatics and is expressed mathematically as E.ds = Q/ε0.

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Answer:

The origin or cause of the Big Bang, the event that marks the beginning of our observable universe, is still a topic of scientific investigation and speculation. The Big Bang theory describes the expansion of the universe from a highly dense and hot state, but it does not explain the underlying cause of the initial singularity.

According to the Big Bang theory, all matter, energy, space, and time originated from an extremely hot and dense point, often referred to as a singularity. However, the exact nature of this singularity and what caused it to undergo rapid expansion and create the universe as we know it remains unknown.

In scientific terms, the Big Bang theory describes the evolution of the universe from a fraction of a second after the singularity onward. The singularity itself, which represents the point of infinite density and temperature, is not currently explained within the framework of the theory. It is an area of active research and the subject of various scientific hypotheses and theoretical models.

Some theoretical physicists propose ideas such as quantum fluctuations, multiverse theories, or cosmic inflation to explain the conditions that led to the singularity and the subsequent expansion of the universe. However, these ideas are still being explored, and further scientific advancements and observations are needed to provide more conclusive answers about the origin of the Big Bang.

It's important to note that our current understanding of the universe's early moments is limited, and the ultimate cause of the Big Bang remains an open question in cosmology.

Explanation:

The answer (distance) is:

The distance of the truck in the given time is 216 m.

Displacement (s) of an object equals, velocity (u) times time (t), plus ½ times acceleration (a) times time squared (t2). Use standard gravity, a = 9.80665 m/s2, for equations involving the Earth's gravitational force as the acceleration rate of an object.

Multiply the acceleration by time to obtain the velocity change: velocity change = 6.95 * 4 = 27.8 m/s . Since the initial velocity was zero, the final velocity is equal to the change in speed. You can convert units to km/h by multiplying the result by 3.6: 27.8 * 3.6 ≈ 100 km/h.

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Answer:

I believe it is actually C

Explanation:

Matter and energy cannot be created or destroyed so A is incorrect

Since energy cannot be created, B is incorrect

while C and D both sound correct, D does not mention entering while C does so I believe C is correct. When i submit this answer into my quiz, i will add if i am right.

In the universe, all energy and matter are contained; no energy or matter enters or exits - the statement best describes why the universe could be considered an isolated system.

A thermodynamic system is said to be isolated if it cannot exchange either mass or energy with the outside world. In contrast to a closed system, energy can't move across isolated systems. Energy can move freely within and outside of closed systems; they are only closed to matter.

As both energy and matter can not exit from a universe, we can consider universe as a isolated system.

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Answer:

The circuit in series has a greater resistance.

Explanation:

The current is forced to flow throw two resistors instead of just one as it if it were in parallel.