What did the cathode ray tube experiment demonstrate.

The minimum height necessary for a boat's bottom to float is 12 cm.

The weight of the item submerged in the liquid is resisted by the liquid's upward force. An item submerged in liquid always experiences higher pressure at the bottom than at the top. An item experiences a net upward force as a result of a fluid pressure difference. Lift is the term for this upward force. Understanding density and relativity is necessary in order to completely comprehend the idea of buoyancy.

Example: A ship has a flat, hollow bottom and is substantially less dense than water, yet it is built to be hoisted quite high. As a result, the ship moves as much water as is necessary to float.

Weight of displaced water in a well equals 6200 N.

Given that 1 m3 of water weighs 1000 kg, the weight is 1000 x 9.81, or 9810 N.

hence, the amount of water displaced is equal to 6200 / 9810 m3.

Needed depth is equal to volume/floor area/9 (6200/(98105)). m\s=0.126m\s=12cm

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Answer:

45.31 J

Explanation:

We are given that

Mass of baseball , m=0.145 kg

Initial velocity, u=0

Final velocity, v=25 m/s

We have to find the work done on the baseball to bring it from rest to 25 m/s

We know that

Work done = Change in kinetic energy

Work done, W=\(\frac{1}{2}m(v^2-u^2)\)

Using the formula

Work done, W\(=\frac{1}{2}(0.145)((25)^2-0)\)

Work done=\(\frac{1}{2}(0.145)(625)\)

Work done, W=45.31 J

Hence, the work done on the baseball to bring it from rest to 25 m/s

=45.31 J

Answer: I think coast (offshore)

Explanation: Offshore wind speeds tend to be faster than on land.

Answer:

Explanation: Astronauts on the orbiting space station are weightless because... a. there is no gravity in space and they do not weigh anything. ... space is a vacuum and there is no gravity in a vacuum.

Answer:

No I believe

Explanation:

Typically, the "refracted angle" is used to refer to the "angle of deviation."

Snell's Law is simply applied in this case.

Since n1sin1 = n2sin2,

The incidence angle is 1

The refracted angle is 2

The appropriate indices of refraction are n1 and n2.

the standard value for air, n1, is 1.

n2 = 1.5

As a result, the refractive indices of the two media may be related through the angle associated with incidence and refraction. The incident ray, the refracted ray, and the normal ray are all said to be on the same plane.

Snell's Law is particularly significant for optical technologies like fibre optics. According to Snell's Law, the refractive indices of the materials at the contact are proportional to the ratio of the sine of the angles of incidence and transmission.

The extension is obeyed by the e-ray Because the refractive index of an e-ray changes with the angle between the wave vector and optical axis, Snell's law applies. It is important to consider e-ray propagation in the uniaxial crystal.

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The ranks are:

Capacitor C: side length 2l, distance between plates d, dielectric constant 2K. > Capacitor B: side length 1/2, distance between plates d/2, dielectric constant 4K. > Capacitor A: side length l, distance between plates d, dielectric constant K. = Capacitor D: side length l, distance between plates 2d, dielectric constant 2K.

The structure of a capacitor is made of 2 metal plates separated by a dielectric material.

If both ends of the metal plate are given an electric voltage, positive charges will collect on one of the metal legs (electrodes) and at the same time negative charges collect on the other end of the metal.

Positive charge cannot flow towards the end of the negative pole and vice versa negative charge cannot go to the end of the positive pole, because it is separated by a non-conductive dielectric material.

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Answer:

c

Explanation:

in the graph, mandarin has the highest amount of speakers

Answer:

English

Explanation:

this is because wants to know how to speak in English

∃x ∀y P(x, y) is equivalent to ∀y ∃x P(x, y), where P(x, y) is a predicate involving variables x and y.

To demonstrate that the two statements are equivalent, let's break down their meanings:

∃x ∀y P(x, y) means "There exists an x such that for all y, P(x, y) is true."

∀y ∃x P(x, y) means "For all y, there exists an x such that P(x, y) is true."

To show their equivalence, we need to prove that if one statement is true, the other is also true, and vice versa.

Assume ∃x ∀y P(x, y) is true. This means that there exists at least one value of x such that for all possible values of y, P(x, y) is true. Now, let's consider the statement ∀y ∃x P(x, y).

Since the quantifiers are swapped, it states that for all possible values of y, there exists at least one value of x such that P(x, y) is true.

This is essentially the same as the original statement, where we have one x value that satisfies the predicate for all y values. Therefore, if ∃x ∀y P(x, y) is true, then ∀y ∃x P(x, y) is also true.

Conversely, assume ∀y ∃x P(x, y) is true. This means that for all possible values of y, there exists at least one value of x such that P(x, y) is true. Now, let's consider the statement ∃x ∀y P(x, y).

This statement states that there exists at least one value of x such that for all possible values of y, P(x, y) is true. Since we already know that for all y, there exists an x that satisfies the predicate, it is guaranteed that there exists at least one x value that satisfies the predicate for all y values. Hence, if ∀y ∃x P(x, y) is true, then ∃x ∀y P(x, y) is also true.

The statements ∃x ∀y P(x, y) and ∀y ∃x P(x, y) are equivalent. Swapping the order of the quantifiers does not change the overall meaning of the statement.

Both statements assert the existence of an x value that satisfies a predicate for all possible y values, albeit with a different syntactic structure.

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Answer:

600Hz

Explanation:

Velocity describes motion by indicating how fastan object moves and in what direction. Speed is a magnitude of velocity, which indicates only how fast an object moves. Speed shows how much distance is traversed in a given interval of time: In a general case of motion,.

One significant method for assessing body fat distribution is measurement of waist circumference.

Waist circumference is a widely used method for assessing body fat distribution and is an important indicator of central obesity. It involves measuring the circumference of the waist at a specific anatomical landmark, typically at the level of the narrowest point between the ribs and the iliac crest.

The measurement of waist circumference provides valuable information about the distribution of body fat. Excess fat accumulation in the abdominal region, also known as central obesity or android obesity, is associated with a higher risk of various health conditions, including cardiovascular diseases, type 2 diabetes, and metabolic syndrome.

By measuring waist circumference, healthcare professionals can evaluate an individual's body fat distribution and assess their risk for developing obesity-related health problems.

The measurement of waist circumference is relatively simple and non-invasive, making it a practical method for assessing body fat distribution in clinical and research settings. It is often used in conjunction with other anthropometric measurements, such as body mass index (BMI), to provide a comprehensive evaluation of an individual's body composition and health status.

Regular monitoring of waist circumference can help track changes in body fat distribution over time and guide interventions aimed at reducing central obesity and improving overall health.

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Answer:

C

Explanation:

That is where the most heat and light is showing on this diagram.

The sun on this HR diagram is placed at region A. The correct option is A.

The Hertzsprung-Russell (HR) diagram is a plot of stars that shows their luminosity (or brightness) versus their temperature or spectral type. The HR diagram is divided into several main parts:

Main sequence: This is the prominent diagonal band that extends from the upper left (hot, bright stars) to the lower right (cool, dim stars). The main sequence represents stars that are fusing hydrogen in their cores and is where most stars, including the Sun, spend the majority of their lives.

Giants and supergiants: These are stars that are much larger and more luminous than main-sequence stars, and are found above and to the right of the main sequence. Giants and supergiants are typically older stars that have exhausted the hydrogen fuel in their cores and are in the later stages of their evolution.

White dwarfs: These are the small, dense remnants of stars that have exhausted their nuclear fuel and have shed their outer layers. White dwarfs are found at the lower left of the HR diagram and are the final stage of evolution for stars like the Sun.

Instability strip: This is a narrow region of the HR diagram that includes some of the most variable stars, such as Cepheid variables and RR Lyrae variables. These stars pulsate in size and brightness over a regular period of time, making them useful for measuring distances to other galaxies.

By studying the position of stars on the HR diagram, astronomers can learn about their size, age, temperature, and luminosity, and use this information to develop models of stellar evolution and the history of the universe.

In this question,

The Sun is a main-sequence star, meaning it is in the phase of its life cycle where it is fusing hydrogen in its core to form helium.

On an HR diagram, the Sun falls near the center of the main sequence, which is a diagonal band that extends from the upper left (hot, bright stars) to the lower right (cool, dim stars). The temperature of the Sun is about 5,500°C, which places it in the spectral class G2V.

Therefore, The sun resides in the region of A.

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Answer:

243J

Explanation:

K.E = 1/2 x 54 x 3^2

K.E = 1/2 x 54 x 9

K.E = 1/2 x 486

K.E = 486/2

K.E = 243J

Answer:

Por que existe una relación entre dichas magnitudes.

Para un pendulo perfecto de largo L, sabemos que el periodo esta definido como:

\(T = 2*\pi *\sqrt{L/g}\)

Donde:

pi = 3.14

L = largo del péndulo

g = aceleración gravitatoria = 9.8 m/s^2

Entonces podemos ver que el periodo es proporcional a la raíz cuadrada de la longitud del péndulo.

Esto es por lo que al analizar datos de un experimento se debería observar una relación entre esas magnitudes.

Answer:

Increase height

Increase mass

The introduction of railroads in Louisiana had a significant impact on the state's steamboat industry. Before the railroads, steamboats were the primary mode of transportation for goods and people in Louisiana, with the Mississippi River serving as a vital thoroughfare for trade.

However, with the expansion of railroads in the state, the demand for steamboats began to decline. Railroads were faster, more reliable, and often cheaper than steamboats, and they could transport goods and people overland, bypassing the need to navigate the winding and often unpredictable waterways of the Mississippi River.

As a result, the steamboat industry in Louisiana faced increasing competition from the railroads. Many steamboat companies went out of business or were forced to adapt to survive. Some steamboats shifted their focus to passenger transportation and tourism, while others specialized in transporting goods that were difficult or impossible to transport by rail.

Despite the challenges posed by the railroads, the steamboat industry in Louisiana continued to play an important role in the state's economy and culture. Today, Louisiana is home to a number of historic steamboats that operate as tourist attractions and cultural landmarks, preserving the legacy of this once-vital industry.

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Answer:

6.3 m/min

Explanation:

Circumference of a circle = 2πr

r = D/2 = 40m/2 = 20m

C = 2π(20m) = 125.7 m

speed = distance/time = (125.7 m) / (20  min)  = 6.3 m/min

To find the average velocity on a velocity-time graph, you need to calculate the slope of the line connecting two points on the graph. The average velocity represents the change in velocity divided by the change in time between those two points.

To calculate the average velocity, you can use the formula:

Average velocity = (change in velocity) / (change in time)

You can determine the change in velocity by finding the difference between the final velocity and the initial velocity. The change in time is the difference in the time coordinates of the two points.

Select two points on the velocity-time graph, typically denoted by (t₁, v₁) and (t₂, v₂), where t represents time and v represents velocity. Then, substitute the values into the formula mentioned above to calculate the average velocity.

It's important to note that the average velocity provides information about the overall change in velocity over a specific time interval, rather than instantaneous velocity at a particular moment.

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Answer:

131 N

Explanation:

F = 82.0 kg x 1.60 m/s^2 = 131.2 N

Answer:

see below

Explanation:

1. density = mass / volume

2. kg/mL,  g/cm³

3. volume = mass / density

4. mass = density x volume

5.  

d = m / v

d = 32.9 g / 45.78 mL

d = 0.72 g/mL

6.

vol = m / d

vol = 0.62 g / 120g/cm³

vol = 0.00517 cm³

7.

m = v * d

m = 2.07 g/mL * 60.9 mL

m = 126.063 g

Answer:

86.2 m  range

Explanation:

Vertical component of initial shot = 30 sin 55= 24.575 m/s

Now you can find out for how long it is in the air

     when it hits the ground , position = 0

            0 = 24.575 t  - 1/2 ( 9.81) t ^2

                         finds t = 5.01 seconds       (Using quadratic formula)

HORIZONTAL component = 30 cos 55 = 17.21 m/s

    it travels this speed for 5.01 seconds

               5.01 * 17.21 = 86.2 m

The potential difference across the plates remains the same (δvc) when the plates of a charged capacitor are pulled apart to a new separation of distance 2d.

When the plates of a charged capacitor are pulled apart to a new separation of distance 2d, the potential difference across the capacitor remains the same. In this case, the potential difference is given by δvc.

To understand why the potential difference remains the same, we need to consider the definition of capacitance. The capacitance (C) of a capacitor is defined as the ratio of the charge (Q) stored on the capacitor plates to the potential difference (V) across the plates. Mathematically, it can be expressed as:

C = Q/V

Since the wires and batteries are disconnected, the charge on the capacitor plates remains constant. Therefore, as the separation distance between the plates is doubled (from d to 2d), the capacitance (C) also doubles.

Now, we can use the formula for capacitance to express the potential difference (V) in terms of the initial potential difference (δvc) and the initial capacitance (C):

V = Q/C

Since the charge (Q) and the potential difference (V) remain constant, and the capacitance (C) doubles, we can substitute these values into the equation:

δvc = Q/C

Simplifying the equation, we get:

δvc = Q/(2C)

Therefore, the potential difference across the plates remains the same (δvc) when the plates of a charged capacitor are pulled apart to a new separation of distance 2d.

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Answer:

PE = 0.35 J

Explanation:

Elastic potential energy in a spring is defined by PE = (1/2)kx^2, where k is the spring constant and x is the distance compressed/stretched. Converting 16 cm to 0.16 m, we get

PE = (1/2) * 27 * (0.16^2)

PE = 0.35 J

Answer: Change 2 would make the lever more efficient because this would make it easier to lift.

Explanation:

The considered change is:  Make a longer lever that will require less force because it  would make the lever more efficient because this would make it easier to lift.

A beam is pivoted at a fixed fulcrum, to form a simple machine known as a lever. A body that can rotate about a point on itself is called a lever.

The lever is classified into three types based on where the fulcrum, weight, and effort are located. Additionally, leverage is a systemic mechanical advantage.

One of the six simple devices that Renaissance scientists identified. Leverage is the ability to increase an input force into a bigger output force through the use of a lever. The mechanical advantage of the lever is determined by the ratio of output force to input force.

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An adiabatic process is one in which the heat exchanged with the surroundings is zero.

In an adiabatic process, there is no transfer of heat between the system and its surroundings. This means that the system is thermally isolated, and there is no heat flow into or out of the system. As a result, the temperature of the system can change due to internal energy conversion, but there is no heat exchange with the surroundings.

In contrast, a non-adiabatic process involves heat transfer between the system and its surroundings. This can occur through conduction, convection, or radiation. The heat exchanged during a non-adiabatic process can cause changes in temperature, pressure, or other properties of the system.

The defining characteristic of an adiabatic process is the absence of heat exchange with the surroundings. This allows for the examination of changes in temperature, pressure, and other thermodynamic properties solely based on work done on or by the system. Adiabatic processes are commonly encountered in various fields, such as thermodynamics, meteorology, and engineering.

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Answer:

W is not a type of simple machine

Explanation:

The speed of the baseball is 30.38m/s .

We are given that,

The mass of bat = m₁ = 4.3 kg

The mass of baseball = m₂ = 2.5 kg

The initial velocity of bat = v₁ = 37 m/s

The final velocity of bat = v₁' = 19 m/s

So that the speed in baseball can be calculated from the law of conservation of momentum which can be given as,

mₙvₙ = m₁v₁ +m₂v₂

(m₁ + m₂)vₙ = m₁v₁ + m₂v₂

Where, vₙ is the speed of the baseball after impact, mₙ is the total mass of the system ,

(4.3kg + 2.5kg)vₙ = (4.3kg × 37m/s) + (2.5kg × 19m/s)

(6.8kg) vₙ = 159.1kg-m/s + 47.5kg-m/s

vₙ = (206.6kg-m/s)/6.8kg

vₙ = 30.38 m/s

Therefore, the speed of the baseball would be 30.38m/s after impact.

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The gauge pressure inside the soap bubble is approximately 4.857 Pa using the surface tension γ = 0.034 N/m for the solution.

To calculate the gauge pressure inside a soap bubble with a radius of 1.4 cm and surface tension γ = 0.034 N/m, we can use the Young-Laplace equation for spherical shapes:
Gauge pressure (P) = 2 * γ / R
1. First, convert the radius from cm to meters:
R = 1.4 cm * (1 m / 100 cm) = 0.014 m
2. Next, use the Young-Laplace equation to calculate the gauge pressure:
P = (2 * 0.034 N/m) / 0.014 m
3. Calculate the result:
P ≈ 4.857 N/m²
The gauge pressure inside the soap bubble is approximately 4.857 Pa.

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Answer:

You take the basic formula of E = I x R, solve for R -> R = E / I. In other words, take the required voltage drop (in volts) and divide by the current (in amps) in the resistor and determine the resistance (R) in ohms.

Explanation: hope this helps