When the stomes are unloaded into water, the water level falls because the volume of the water displaced by stones in water will be less than the volume of water displaced when stones are in the boat. ithink yes

Cell sap is located in the central vacuole and is encircled by the tonoplast, a single-layer membrane. Turgor pressure regulation within the plant cell is the primary duty of the central vacuole.

Plant cells have a thick cell wall surrounding them, resembling tiny balloons. They sometimes have internal pressure that exceeds the pressure of an automobile tyre. The form of non-woody plant tissue is a result of this pressure.

A framework called the cytoskeleton helps cells keep their internal structure and order. It also offers mechanical support, allowing cells to perform critical processes like division and mobility.

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Answer:

Concave mirror

Explanation:

Because as we move the object far away from the mirror, the image gets inverted.

Answer:

Concave mirror

Explanation:

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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No kinetic energy is transferred to the hydrogen atom since it was initially stationary.

In an elastic collision, both momentum and kinetic energy are conserved. Since the hydrogen atom is initially stationary, the electron's initial kinetic energy will be transferred to the kinetic energy of the hydrogen atom after the collision.

The percentage of the electron's initial kinetic energy transferred to the hydrogen atom can be calculated by comparing the final kinetic energy of the hydrogen atom to the initial kinetic energy of the electron.

Let's assume the electron's initial kinetic energy is K1, and the final kinetic energy of the hydrogen atom is K2.

Since the hydrogen atom was initially stationary, its initial kinetic energy is zero (K2 = 0).

The conservation of kinetic energy tells us that K1 = K2.

Therefore, the percentage of the electron's initial kinetic energy transferred to the hydrogen atom is:

( K2 / K1 ) * 100 = ( 0 / K1 ) * 100 = 0%

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Answer:

20 m/s

Explanation:

Acceleration = Change in velocity/ time

4 = Change in Velocity/ 5

Change in velocity = 20 m/s

Iron has strong ferromagnetic properties and that is why it is used as core in electromagnets. However, iron can easily be demagnetized but steel cannot. Steel forms permanent magnet.

An electromagnet is a material which can form a magnetic field in the presence of an electric field. The magnetic field strength depends on the nature of the material as well the strength of the electric field.

Iron is a metal exhibiting strong ferromagnetic properties. The magnetic field lines can align along the applied field and it can be lost when the applied field is removed.

Therefore, iron can be demagnetized when the switch is off. If we use steel instead it would be very difficult to demagnetize and will form a permanent magnet.

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Tornados are the most destructive versions of thunderstorms. Tornadoes have high winds and general speed compared to regular thunderstorms.

The arrow that indicates the direction of centripetal force on the object represented by the dot is the arrow that points towards the center of the circle.

Centripetal force is the force that keeps an object moving in a circular path. It always acts towards the center of the circle, which is why the arrow pointing towards the center of the circle represents the direction of centripetal force. In the diagram below, the object represented by the dot is moving in a circular path, and the arrow pointing towards the center of the circle represents the direction of centripetal force:

```
     ^
     |
<-----O----->
     |
     v
```

In conclusion, the arrow that indicates the direction of centripetal force on the object represented by the dot is the arrow that points towards the center of the circle.

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Answer:

C

Explanation:

The arrow labeled C, pointing towards the middle of the circle

To find the velocity of the electron when it reaches a point 10 cm from q2, we can use the principle of conservation of energy.

The electric potential energy between two charges is given by the equation:

PE = k * (|q1*q2| / r)

Where:

PE is the electric potential energy

k is the Coulomb's constant (8.99 × 10^9 N·m^2/C^2)

q1 and q2 are the charges

r is the distance between the charges

Given:

q1 = 2.5 × 10^-10 C

q2 = 5 × 10^-10 C

r = 1 m

The electric potential energy when the electron is midway between the charges (r = 0.5 m) is:

PE_initial = k * (|q1*q2| / r_initial)

          = (8.99 × 10^9 N·m^2/C^2) * (|(2.5 × 10^-10 C)*(5 × 10^-10 C)| / 0.5 m)

Now, let's calculate the electric potential energy when the electron is at a point 10 cm (0.1 m) from q2:

PE_final = k * (|q1*q2| / r_final)

        = (8.99 × 10^9 N·m^2/C^2) * (|(2.5 × 10^-10 C)*(5 × 10^-10 C)| / 0.1 m)

According to the conservation of energy, the change in electric potential energy is equal to the change in kinetic energy:

ΔPE = ΔKE

PE_final - PE_initial = (1/2) * m * v^2

We know the electron's mass is approximately 9.10938356 × 10^-31 kg.

Rearranging the equation to solve for the velocity (v):

v = √((2 * (PE_final - PE_initial)) / m)

Substituting the given values and calculating:

v = √((2 * (PE_final - PE_initial)) / m)

  = √((2 * ((8.99 × 10^9 N·m^2/C^2) * (|(2.5 × 10^-10 C)*(5 × 10^-10 C)| / 0.1 m)) - (8.99 × 10^9 N·m^2/C^2) * (|(2.5 × 10^-10 C)*(5 × 10^-10 C)| / 0.5 m))) / (9.10938356 × 10^-31 kg)

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Taking into account the Newton's second law, the acceleration of the 100 g mass is 50 m/s².

Newton's second law states that this force will change the speed of an object because the acceleration and/or direction will change.

So, Newton's second law defines the relationship between force and acceleration mathematically. This law says that the acceleration of an object is directly proportional to the sum of all the forces acting on it and inversely proportional to the mass of the object:

F= m×a

where:

In this case, you know:

Replacing in Newton's second law:

5 N= 0.1 kg× a

Solving:

a= 5 N÷ 0.1 kg

a= 50 m/s²

Finally, the acceleration is 50 m/s².

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Answer:

The answer would be D. 5 N/kg

A 500. Kg car is driving with a speed of 4.00 m/s, the momentum of car is 2000 kg.m/sec

Momentum is characterized as the intensity of a body's motion. As momentum relies on both velocity and the direction of the body's motion, it is quantified by "mass velocity". Because velocity is a vector, momentum is a also a vector quantity, whereas mass is a scalar number.

Given that,

mass of car (m) = 500 kg

velocity of car (v) = 4.00 m/sec

Thus, momentum (p) = m × v

p = 500 kg × 4.00 m/sec

p = 2000 kg.m/sec

Thus, momentum of car is 2000 kg.m/sec

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In conclusion, the magnitude of the net force parallel to the ramp is m * g * sin(θ), and the magnitude of the acceleration is F / m, where F is the net force parallel to the ramp, m is the mass of the box, g is the acceleration due to gravity, and θ is the angle of the ramp.

When a box of mass m is pushed on a frictionless ramp inclined at an angle θ, the magnitude of the net force parallel to the ramp can be determined using trigonometry. The force acting parallel to the ramp is given by the equation

F = m * g * sin(θ),

where m is the mass of the box, g is the acceleration due to gravity, and θ is the angle of the ramp.
To understand this, let's break it down step-by-step. The weight of the box is given by the equation

W = m * g,

where m is the mass and g is the acceleration due to gravity. This weight can be resolved into two components: one perpendicular to the ramp and one parallel to the ramp. The component parallel to the ramp is

W * sin(θ),

where θ is the angle of the ramp.
Since the box is on a frictionless ramp, there is no friction force acting on it. Therefore, the only force parallel to the ramp is the component of the weight. Thus, the magnitude of the net force parallel to the ramp is

F = m * g * sin(θ).
Moving on to the acceleration, we can use Newton's second law, which states that the net force acting on an object is equal to the mass of the object multiplied by its acceleration. In this case, the net force parallel to the ramp is

F = m * g * sin(θ).

Therefore, the magnitude of the acceleration is given by the equation a = F / m.
In conclusion, the magnitude of the net force parallel to the ramp is m * g * sin(θ), and the magnitude of the acceleration is F / m, where F is the net force parallel to the ramp, m is the mass of the box, g is the acceleration due to gravity, and θ is the angle of the ramp.

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Answer:

Hello, Yes i believe it would be a positive charge considering electrons have a negative charge while protons have a positive charge.

Explanation:

It moves at a constant linear speed around it. Yet, the linear velocity at any point on the blades is constantly varying and accelerating.

Acceleration typically indicates a change in speed, but not necessarily. An item that follows a circular course while maintaining a constant speed is still moving forward because the direction of its motion is shifting.

Most likely, you picture something racing up when you think about acceleration. But a moving thing accelerates as it slows down. A change in speed is what acceleration is, so keep that in mind. The speed of a car that is slowing down decreases.

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Taking into account the definition of speed, the average speed of the Olympic sprinter is 10 \(\frac{m}{s}\).

Speed ​​is a physical quantity that expresses the relationship between the space traveled by an object and the time used for it.

In other words, speed can be defined as the amount of space traveled per unit of time with which a body moves and can be calculated using the expression:

\(speed=\frac{distancetraveled}{time}\)

In this case, you know:

Replacing these values ​​in the speed definition:

\(speed=\frac{100 m}{10 s}\)

Solving:

speed= 10 \(\frac{m}{s}\)

In summary, the average speed of the Olympic sprinter is 10 \(\frac{m}{s}\).

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Answer:

The relative velocity of the boy with respect to the sea is 37.7 km/hr

Explanation:

Answer:

37.7 km/hr I'd the velocity

Middle part of the ear have a solid medium. The ossicles, which are bones that amplify sound waves, are located in the middle ear, therefore the medium is solid.

The outer ear is the first place that sound waves pass through, followed by the middle ear and lastly the inner ear. The first medium is gas because the external auditory canal, which is part of the outer ear, is filled with ambient air.  The ossicles, which are bones that amplify sound waves, are located in the middle ear; therefore the second medium is solid. The last medium is liquid because the inner ear is loaded with fluids like endolymph and perilymph that vibrate when sound waves pass through them.

The middle ear amplifies sound after being directed toward it by the outer ear, which is in charge of catching it.  Amplified sound waves are sent from the middle ear to the inner ear, where hair cells detect the sound waves and transmit the data to the brain.

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The lithosphere thickens as it moves away from the ridge during seafloor spreading due to a combination of cooling, crystallization, and accretion processes. Here's a breakdown of the main factors contributing to lithospheric thickening:

1. Cooling: As magma rises from the mantle at mid-ocean ridges, it comes into contact with the cold seawater, causing rapid cooling. The cooling process leads to the solidification of the magma, forming new oceanic crust. As the newly formed crust moves away from the ridge, it continues to cool, which thickens the lithosphere.

2. Crystallization: During the cooling process, minerals within the magma begin to crystallize, forming the solid rocks that make up the oceanic crust. The crystallization process results in the growth of mineral grains, which adds to the thickness of the lithosphere.

3. Accretion: Along the mid-ocean ridges, the lithosphere is continually spreading apart as new crust forms. As the seafloor spreads, magma wells up from below, solidifies, and becomes part of the oceanic crust. This continuous addition of new material to the trailing edge of the lithosphere contributes to its thickening.

4. Tectonic Processes: Plate tectonic forces play a role in lithospheric thickening as well. As the lithosphere moves away from the ridge, it can encounter other tectonic plates or interact with subduction zones. These interactions can lead to the accumulation of additional material onto the lithosphere, further increasing its thickness.

Overall, the combination of cooling, crystallization, accretion, and tectonic processes work together to gradually thicken the lithosphere as it moves away from the mid-ocean ridge during seafloor spreading. This thickening is an essential part of the process by which new oceanic crust is formed and contributes to the overall evolution of the Earth's crust and the dynamics of plate tectonics.

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The theory of plate tectonics states that the Earth's outer shell is made up of several large, rigid plates that move and interact with each other. These plates can move away from each other, towards each other, or past each other.

The theory of seafloor spreading is a specific aspect of plate tectonics that explains how new oceanic crust is created at mid-ocean ridges, where plates move away from each other. As the plates move apart, magma rises up from the mantle and cools, forming new crust on the seafloor. Over time, this process can create a long chain of underwater mountains, or mid-ocean ridge.

The theory of plate tectonics supports the theory of seafloor spreading because it provides a mechanism for how the plates move and interact with each other, which ultimately leads to the creation of new oceanic crust at mid-ocean ridges. In other words, plate tectonics provides a framework for understanding how the Earth's outer shell behaves and how the continents and oceans have evolved over time.

Answer:

False

Explanation:

Just took the test

False, because hypochondriacs think they have a significant, undetected medical ailment even when testing reveal they are healthy.

A hypochondriac is someone who, despite diagnostic testing showing they have no health issues, lives in constant anxiety that they have a terrible, undetected medical illness. They are obsessed with the concept that they suffer from a major illness that has gone untreated.

In adults, hypochondriasis often begins to manifest. Among the symptoms are a persistent, strong anxiety of developing a major illness and concern that seemingly little symptoms portend a larger problem. A patient may change physicians or see them regularly.

Medication and counselling could be helpful.

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Squeezing the clutch lever to slow down is best to be done when approaching a curve and is denoted as option C.

This is a mechanical device which used in the engagement and disengagement of transmission system in a vehicle.

Slowing down will give the driver more time to maneuver the curves so as to prevent accident. This is why it is imperative to squeeze the clutch in such road condition.

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Temperature is increased the pressure also increases due to fast movement of molecules because of more energy.

The temperature of the gas is directly proportional to the pressure. Faster moving particles will collide with the walls of the container that put force on the wall which leads to increase in pressure.

So we can conclude that temperature is increased the pressure also increases due to fast movement of molecules because of more energy.

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The tension in the string if a rod PR is balanced on a pivot at the end R while a string is used to support the rod at P is 6 N

Moment = Force * Perpendicular Distance

Let us consider the pivot side be initial point,

Since the rod is balanced,

CM = ACM

CM = Clockwise moment

ACM = Anticlockwise moment

F = 9 N

PQ = 15 cm = 0.15 m

QR = 30 cm = 0.3 m

PR = PQ + QR

PR = 0.15 + 0.3

PR = 0.45 m

CM = W * QR

CM = 9 * 30

CM = 2.70 N m

ACM = T * PR

ACM = 0.45 T N m

2.70 = 0.45 T

T = 6 N

Therefore, the tension in the string is 6 N

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Yes, I agree with this statement. Aberrations and diffraction are physical properties of light that cannot be completely eliminated.

In order to reduce their effects, the aperture of the imaging system must be reduced, which reduces the amount of light that can pass through the system. On the other hand, to increase the depth of field and depth of focus, the aperture of the imaging system must be increased in order to allow more light to pass through it. Thus, these two objectives are at odds with each other, as increasing the aperture to reduce aberrations and diffraction will reduce the depth of field and depth of focus while increasing the aperture to increase the depth of field and depth of focus will increase the effect of aberrations and diffraction.

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Answer:

Explanation:

First off, let's call the -15 degree water solution1, and the 32 degree water solution2. The formula for this is

\(t_f=\frac{(m_1*spheat_1*temp_1)+(m_*spheat_2*temp_2)}{(m_1*spheat_1)+(m_2*spheat_2)}\)

where spheat is specific heat of water that I found to be 4182 J/(kgC). This means that we need our masses in kg and they are currently in g.

100 g = .100 kg and

220 g = .220 kg. Now we're ready to plug everything in:

\(t_f=\frac{(.100*4182*-15)+(.220*4182*32)}{(.100*4182)+(.220*4182)}\) and

\(t_f=\frac{-6273+29441.28}{418.2+920.04}\) and

\(t_f=\frac{23168.28}{1338.24}\) so

\(t_f=17.3\) °C

Answer:

Pick something up with your hand and drop it. When you release it from your hand, its speed is zero. On the way down its speed increases. The longer it falls the faster it travels. Sounds like acceleration to me.

But acceleration is more than just increasing speed. Pick up this same object and toss it vertically into the air. On the way up its speed will decrease until it stops and reverses direction. Decreasing speed is also considered acceleration.

But acceleration is more than just changing speed. Pick up your battered object and launch it one last time. This time throw it horizontally and notice how its horizontal velocity gradually becomes more and more vertical. Since acceleration is the rate of change of velocity with time and velocity is a vector quantity, this change in direction is also considered acceleration.

In each of these examples the acceleration was the result of gravity. Your object was accelerating because gravity was pulling it down. Even the object tossed straight up is falling — and it begins falling the minute it leaves your hand. If it wasn't, it would have continued moving away from you in a straight line. This is the acceleration due to gravity.

In this initial experiment the bowling ball drops straight to the ground whereas the feathers float, owing to air resistance.

He alludes to the earlier experiment by Galileo that tested the same hypothesis.

"Galileo’s experiment was simple," he explains. "He took a heavy object, and a light one, and dropped them at the same time to see which fell fastest."

Although Galileo’s experiment proved two similarly shaped objects would fall at the same speed despite being different weights, he didn’t have access to a vacuum chamber in the 17th Century to conduct Professor Cox's more extravagant experiment.

Professor Cox also used the bowling ball and feather to prove a hypothesis put forward by Albert Einstein.

His Special Theory of Relativity argued that items would not be falling but standing still due to lack of force acting on them.

"Isaac Newton would say that the ball and the feather fall because there’s a force pulling them down: gravity,’ Professor Cox said.

"But Einstein imagined the scene very differently.

"The “happiest thought of his life” [as Einstein called it] was this; the reason the bowling ball and the feather fall together is because they’re not falling.

"They’re standing still. There is no force acting on them at all.

"He reasoned that if you couldn’t see the background, there’d be no way of knowing that the ball and the feathers were being accelerated towards the Earth.

"So he concluded they weren’t."

The tweaking of Newton’s earlier theory enabled Einstein to more accurately define his own theory, which regards the relationship between space and time.

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No, the average speed of a person does not necessarily mean that their speed was exactly 1.2 meters/second the whole time.

Average speed is calculated by dividing the total distance traveled by the total time elapsed. In simple words, Average speed is distance divided by the time interval for the distance traveled. So, if a person's speed varies over time, their average speed will be a reflection of all the different speeds they traveled at during that time period.

The average speed is not related to the maximum or minimum speed of a person. It's the measure of the average rate at which an object covers distance over time. It can be different from the maximum or minimum speed that an object has reached during that time.

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"The type of heat transfer that occurs through fluid motions is known as convection."

Convection, which is the extensive movement of molecules within gases and liquids, is the mechanism through which heat is transported. Conduction is used to move heat from the object to the fluid initially, but fluid motion is responsible for the bulk of the heat transfer.

Forced convection is the term for the movement of fluid caused by an external source (such as a fan, blower, etc.), while natural or free convection refers to the movement of fluid that occurs naturally. This type of heat transfer occurs only when the fluid is in motion.

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