what is the ke of a 10kg mass at 1 m/s

When the radii of curvature of the two faces of the lens are interchanged, the focal length of the lens for light incident from the left is approximately 22.73 cm.

To calculate the focal length of the biconvex lens when the radii of curvature of the two faces are interchanged, we can use the lensmaker's formula:

\(\[ \frac{1}{f} = (n - 1) \left( \frac{1}{R_1} - \frac{1}{R_2} \right) \]\)

where:

\(\( f \)\) is the focal length of the lens,

\(\( n \)\) is the refractive index of the glass,

\(\( R_1 \)\) is the radius of curvature of the left face,

\(\( R_2 \)\) is the radius of curvature of the right face.

Given:

The radius of curvature of the left face, \(\( R_1 = 12.0 \)\) cm,

The radius of curvature of the right face, \(\( R_2 = 18.0 \)\) cm,

The refractive index of the glass, \(\( n = 1.44 \)\).

Substituting the given values into the lensmaker's formula:

\(\[ \frac{1}{f} = (1.44 - 1) \left( \frac{1}{12.0 \, \text{cm}} - \frac{1}{18.0 \, \text{cm}} \right) \]\)

Simplifying:

\(\[ \frac{1}{f} = 0.44 \left( \frac{18.0 \, \text{cm} - 12.0 \, \text{cm}}{12.0 \, \text{cm} \cdot 18.0 \, \text{cm}} \right) \]\\\\\ \frac{1}{f} = 0.44 \left( \frac{6.0 \, \text{cm}}{216.0 \, \text{cm}^2} \right) \]\\\\\ \frac{1}{f} = 0.044 \, \text{cm}^{-1} \]\)

Now, we can find the focal length by taking the reciprocal:

\(\[ f = \frac{1}{0.044 \, \text{cm}^{-1}} \]\\\\\ f \approx 22.73 \, \text{cm} \]\)

Therefore, when the radii of curvature of the two faces of the lens are interchanged, the focal length of the lens for light incident from the left is approximately 22.73 cm.

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Once ice has been taken out of the freezer, its molecules start to travel more quickly when heat energy is supplied.

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Explanation:

This happens because the gas inside tend to expand because its temperature gets higher.

This is why the balloon that is put in a freezer for too long tend to gets smaller, because the gas temperature that is inside the balloon decreases.

(you can try it at home)

It is related to the temperature of the gas.

Answer:

The distance of one lap on this track from the start line to the finish line is 400 meters. Two laps around the track is 800 meters, half a lap is 200 meters, and so on.

    Remember, displacement is the direction from the starting point and the length of a straight line from the starting point to the ending point. If a runner was going to run 400 meters (one lap around the track), they would start and stop at the same place on the track. Therefore, their displacement would be 0.

Explanation:

hope this helped

Answer:

\(\boxed {\boxed {\sf Gabi \ had \ greater \ displacement}}\)

Explanation:

Displacement is the change in the position of an object.

Abigail runs a complete lap around the track, which is 400 meters. Even though she ran 400 meters, she has no displacement. If she starts and ends at the same spot, there is no change in position.

Gabi runs a 50 meter dash in a straight line. Gabi has 50 meters of displacement. She runs in a straight line and is 50 meters away from where she began.

While Abigail ran the farther distance, Gabi had the greater displacement.

The electric field at point P is \({2.12\times10^2\ \mathrm{\frac{N}{C}}\ \hat z}\)

Given values: Radius, r = 1.80 cm Charge density, σ = +4.80 p C/m² z-coordinate, z = 2.64 cm

The electric field at point P at z = 2.64 cm is to be determined.

Let the origin of the coordinate system be the center of the circular hole.

Take the z-axis perpendicular to the surface of the nonconducting material.

The surface charge density is uniform, that is, it has the same magnitude and direction at each point.

Use the expression for electric field due to a charged disk to determine the electric field at point P.

Electric field due to a charged disk at a point on the axis of the disk:  \(E=\frac{1}{4\pi\ϵ_0}\frac{\sigma}{2}(1-\frac{R^2}{R^2+z^2})\) Here, \(\ϵ_0\) is the permittivity of free space.

R is the radius of the disk.

z is the distance from the center of the disk.

The expression for the electric field reduces to \(E=\frac{1}{4\pi\ϵ_0}\frac{\sigma}{2}(1-\frac{r^2}{r^2+z^2})\hat z\)

The electric field at point P is \(\begin{aligned} E&=\frac{1}{4\pi \ϵ _0}\frac{ \sigma }{2}(1-\frac{r^2}{r^2+z^2})\hat z\\ &=\frac{1}{4\pi \times 8.85\times10^{-12}}\frac{4.80\times10^{-12}}{2}(1-\frac{(1.80\times10^{-2})^2}{(1.80\times10^{-2})^2+(2.64\times10^{-2})^2})\hat z\\ &=\boxed{2.12\times10^2\ \mathrm{\frac{N}{C}}\ \hat z} \end{aligned}\)

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Question:

What do you think will happen to the people in the airplane if their location is unknown?

My opinion:

I mean what are the circumstances? Is it just a rogue pilot that takes a random plane with all the passengers Hostage or is It bad whether an they lose connection to the airport? I Mean either way, If I was on a plane being held hostage, or the plane crashing, I Would be a in a panic type state of mind. I Would be worried about what will happen when the plane crashes, I would worry about my friends or family that is aboard the plane with me, I Would be scared for my life because I Don't know if i would make it out alive.

Also:

How would they know their location is unknown wouldn't the Pilot be the only one to know exactly where there with their navigating system, But then again there was this time I headed to Florida an They had mini tv's on the seats of each chair, where you could: Watch movies, listen to music, an Also see exactly where you are in the world. It was really amazing actually.

Answer:

false

Explanation:

Explanation:

When Two Samples of Water are Mixed, what Final Temperature Results?

Go to Mixing Two Amounts of Water: Problems 1 - 10

Go to calculating the final temperature when mixing water and a piece of metal

Worksheet #2

Back to Thermochemistry Menu

Example #1: Determine the final temperature when 32.2 g of water at 14.9 °C mixes with 32.2 grams of water at 46.8 °C.

This is problem 8a from Worksheet #2.

First some discussion, then the solution. Forgive me if the points seem obvious:

1) The colder water will warm up (heat energy "flows" into it). The warmer water will cool down (heat energy "flows" out of it).

2) The whole mixture will wind up at the SAME temperature. This is very, very important.

3) The energy which "flowed" out (of the warmer water) equals the energy which "flowed" in (to the colder water)

This problem type becomes slightly harder if a phase change is involved. For this example, no phase change. What that means is that only the specific heat equation will be involved

Solution Key Number One: We start by calling the final, ending temperature 'x.' Keep in mind that BOTH water samples will wind up at the temperature we are calling 'x.' Also, make sure you understand that the 'x' we are using IS NOT the Δt, but the FINAL temperature. This is what we are solving for.

The warmer water goes down from to 46.8 to x, so this means its Δt equals 46.8 − x. The colder water goes up in temperature, so its Δt equals x − 14.9.

That last paragraph may be a bit confusing, so let's compare it to a number line:



To compute the absolute distance, it's the larger value minus the smaller value, so 46.8 to x is 46.8 − x and the distance from x to 14.9 is x − 14.9.

These two distances on the number line represent our two Δt values:

a) the Δt of the warmer water is 46.8 minus x

b) the Δt of the cooler water is x minus 14.9

Solution Key Number Two: the energy amount going out of the warm water is equal to the energy amount going into the cool water. This means:

qlost = qgain

However:

q = (mass) (Δt) (Cp)

So:

(mass) (Δt) (Cp) = (mass) (Δt) (Cp)

With qlost on the left side and qgain on the right side.

Substituting values into the above, we then have:

(32.2) (46.8 − x)(4.184) = (32.2) (x − 14.9) (4.184)

Solve for x

Answer:

To find the x- and y-components of the vector, we can use trigonometric functions. The x-component is the adjacent side of the angle and the y-component is the opposite side.

Given:

Magnitude r = 175 m

Angle α = 50.0°

The x-component can be found using the cosine function:

cos(α) = adjacent/hypotenuse

cos(50.0°) = x/175

x = 175 cos(50.0°)

x ≈ 112.25 m

The y-component can be found using the sine function:

sin(α) = opposite/hypotenuse

sin(50.0°) = y/175

y = 175 sin(50.0°)

y ≈ 135.55 m

Therefore, the x-component of the vector is approximately 112.25 m and the y-component is approximately 135.55 m.

Answer:    

External forces acting on an object may include friction, gravity, normal force, drag, tension, or a human force due to pushing or pulling. When in a non-inertial reference frame (see coordinate system, below), fictitious forces, such as centrifugal pseudoforce are appropriate.

Explanation:

Answer:

I don't understand

Explanation:

Answer:

USE RUBBER CLOVES

USE A PLIER

USE CONDUCTIVE WIRES

SWITHC OFF THE MAIN SWITCH WHILE WIRRING

Explanation:

The size of the wavelength of a radio wave is in the order of millions of meters.

Radio wave is part of the electromagnetic spectrum. The radio wave is known to travel across a long distance because it has a long wavelength. This means that it has a low energy.

Hence, the size of the wavelength of a radio wave is in the order of millions of meters.

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Answer: Building

Explanation: took a quiz :)

Answer:

A kg of cotton is heavier.

Explanation:

Because in air, cotton gets upthrust that's why weighing machine gives less weight than its actually have.

for eg: If cotton has 800g weight, the machine shows a kg(1kg) when measure in air due to upthrust.

I hope this will be helpful for you.

Answer: Due to atmospheric pressure 1 Kg of Cotton is slightly heavier than 1 kg of Iron.

Explanation: According to me cotton will be more lighter as air is a fluid and Archimedes principal applies on it. As cotton occupies more volume it will feel more up thrust and more loss in weight. That cotton is more heavier .

7777Answer:

Explanation:

Answer:

just rry

Explanation:

1. Thesame voltage will pass through the resistors in parallel but different current.

2. The same current will pass through the resistors in series

A parallel circuit is one that has two or more paths for the electricity to flow, the loads are parallel to each other.

In a series circuit, the same amount of current flows through all the components placed in it.

1. The total voltage is 9v

therefore thesame voltage will pass through R2 and R3.

voltage across R1 = 3 ×2 = 6V

Therefore voltage across R2 and R3 = 9-6 = 3v

Thesame current 3A will pass through R1 and the equivalent of R2 and R3.

2. The equivalent resistance =1/ 2+1 +( 1/3+1/4)

= 1/3+( 1/3 +1/4)

= 11/12)

= 12/11

= 1.09A

Voltage across R1 = 1.09 × 2

= 2.18V

voltage across R2 = 1 × 1.09 = 1.09V

voltage across R3 and R4 = 5-( 1.09+2.18)

= 1.73V.

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Answer:

Explanation:

Steam spins turbine blades, turning a generator shaft to create electricity.

Heat energy is converted to mechanical energy and then electricity.

Given that the rate of gas flow through a bronchial tube is 40 L/min and the radius of the tube is reduced by 16%, we have to find the new flow rate through the bronchial tube is: 16.4 L/min.

As per Poiseuille’s formula, the rate of gas flow through a tube is directly proportional to the fourth power of the radius, i.e., Q = k*r⁴ where Q is the rate of gas flow, r is the radius, and k is a constant.

The new flow rate of the bronchial tube after the reduction of radius can be found as follows:
Let the new radius be r’. Then, r’ = r − 0.16r = 0.84r
Therefore, Q’ = k * r’⁴= k * (0.84r)⁴= k * 0.41r⁴ (rounded to two decimal places)

Now, the rate of gas flow through the bronchial tube is 40 L/min.
Therefore, k*r⁴ = 40=> k = 40/r⁴ Substituting this value of k in the above equation, we get Q’ = 40/r⁴ * 0.41r⁴= 16.4 L/min (rounded to one decimal place)

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The current magnitude in each of the three branches of the circuit below are 1.25 A, 0.924 A and 0.31 A respectively

According to Ohm's law,

V = I R

V = Voltage

I = Current

R = Resistance

In loop 1,

33 I1  + 76 ( I1 - I2 ) - 48 + 20 ( I1 - I2 ) = 22

129 I1 - 96 I2 = 70  → ( 1 )

In loop 2,

76 ( I1 - I2 ) + 51 I1 + 8.5 + 42 I2 + 20 ( I1 - I2 ) = 0

- 96 I1 + 189 I2 = 56.5  

I1 = ( 189 I2 - 56.5 ) / 96  → ( 2 )

Sub ( 2 ) in ( 1 ),

129 ( 189 I2 - 56.5 ) / 96 - 96 I2 = 70

( 24381 I2 - 7288.5 ) / 96 = 96 I2 + 70

24381 I2 - 7288.5 = 9216 I2 + 6720

15165 I2 = 14008.5

I2 = 0.924 A

I1 = ( 189 * 0.924 - 56.5 ) / 96

I1 = 1.25 A

I3 = I1 - I2

I3 = 1.25 - 0.924

I3 = 0.31 A

Therefore, the current magnitude in each of the three branches of the circuit below are:

The given question is incomplete. The complete question is:

Determine the current magnitude and direction of flow in each of the three branches of the circuit below. The circuit is shown in the image attached.

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The term that best describes the landform "dip in a mountain range" is C. Syncline.

Syncline is a term to refer to a fold of the Earth's crust caused by the tectonic effects of the earth's dynamics. A synclinal fold is characterized by being a concave fold, that is, in the shape of a U.

According to the above, answers A, B and D are not correct options because they refer to different shapes of the Earth. Therefore, the landform shown is syncline.

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Answer: C

Explanation: E2022

A(n) active solar system makes use of a secondary medium, such as water, to collect and convey the energy of the sun. Like passive systems, these are often used for heating buildings.

Active solar systems actively circulate a fluid medium, typically water or a heat-transfer fluid, between solar collectors and the building or storage system using mechanical equipment like pumps or fans. The fluid is circulated to provide room heating, water heating, or other heating applications once the solar collectors transfer the energy from the sun to it.

Active solar systems are those that employ solar collectors to heat water that is then circulated via pipes to produce hot water for residential usage or space heating. These systems can be used to heat buildings.

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Newton's First Law of Motion states that every object continues in its state of rest, or of uniform velocity in a straight line, as long as no net force acts on it. This means that if an object is at rest, it will remain at rest unless a force is applied to it. Similarly, if an object is already in motion at a constant speed and direction, it will continue to move in that manner unless a force is exerted on it. In the absence of any external forces, an object will maintain its current state of motion.

Newton's First Law of Motion, often referred to as the law of inertia, describes the behavior of objects when no external forces are acting on them. It states that an object will either remain at rest or continue to move in a straight line at a constant speed if the net force acting on it is zero. This law helps us understand why objects tend to resist changes in their motion.

The first part of the law states that an object at rest will stay at rest unless acted upon by a force. This means that if there are no external forces acting on an object initially at rest, it will remain motionless. For example, if a book is placed on a table, it will stay there until someone or something exerts a force on it.

The second part of the law states that an object in motion will continue moving in a straight line at a constant velocity unless acted upon by a force. This means that if there are no external forces acting on a moving object, it will continue moving with the same speed and direction. For instance, if you slide a hockey puck on an ice rink with no friction, it will keep moving in a straight line until it encounters a force like friction or another object.

Newton's First Law of Motion is fundamental in understanding the behavior of objects in the absence of external forces. It provides the foundation for understanding the concept of inertia and how objects resist changes in their state of motion.

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Answer:

W = 30.38 N

Explanation:

Given that,

Mass of a rock, m = 3.1 kg

We need to find the weight of the rock on the surface of Earth. Weight of an object is given by :

W = mg

g is the acceleration due to gravity, g = 9.8 m/s²

W = 3.1 kg × 9.8 m/s²

= 30.38 N

So, the weight of the rock on the Earth is 30.38 N.

The formula for moment of inertia of a semicircle is I = πr4 / 4. To find the moment of inertia of a semicircle, the moment of inertia of a full circle is calculated first. The result is then divided by half to derive the area moment of inertia of a semicircle.

The moment of inertia of a semicircle can be calculated using the formula: I = \((1/2) * mr^2\)

where I is the moment of inertia, m is the mass of the semicircle, and r is the radius of the semicircle.

The moment of inertia of a semicircle is often used in calculations related to rotational motion, such as when analyzing the behavior of a rotating object or calculating the torque required to accelerate a semicircular object.

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The angle that the bird makes with the positive x-axis can be found using trigonometry. We can use the given components of velocity to calculate the angle. The y-component is 0.10m/s and the magnitude of the velocity is 0.20m/s.

To find the angle, we can use the formula for the tangent of an angle: tan(θ) = opposite/adjacent. In this case, the opposite side is the y-component (0.10m/s) and the adjacent side is the magnitude of the velocity (0.20m/s). Using the formula, we have tan(θ) = 0.10/0.20. Solving for θ, we get θ = tan^(-1)(0.10/0.20). To find the value of θ, we can use a calculator or a table of trigonometric functions. The value of tan^(-1)(0.10/0.20) is approximately 26.57 degrees. Therefore, the bird makes an angle of approximately 26.57 degrees with the positive x-axis.

The y-component is 0.10m/s and the magnitude of the velocity is 0.20m/s. To find the angle, we can use the formula for the tangent of an angle: tan(θ) = opposite/adjacent. In this case, the opposite side is the y-component (0.10m/s) and the adjacent side is the magnitude of the velocity (0.20m/s). Using the formula, we have tan(θ) = 0.10/0.20. Solving for θ, we get θ = tan^(-1)(0.10/0.20). To find the value of θ, we can use a calculator or a table of trigonometric functions. The value of tan^(-1)(0.10/0.20) is approximately 26.57 degrees. Therefore, the bird makes an angle of approximately 26.57 degrees with the positive x-axis.

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To produce the sound of 60 dB in the concert hall, the number of oboes required is equal to 100, which means option B is the right answer.

Oboes is the musical instrument which is used to produce sound. It is made up of exotic wood. The sound produced by the oboes has a pitch which is steadier than strings, so it's a more reliable tuning source.

To calculate the number of oboes required to produce 60 dB sound, we first calculate the difference in the sound intensity. Since initial sound intensity is equal to 50 dB and the increased sound intensity is equal to 60 dB, therefore difference is 10 dB.

Applying the formula N2/N1 = 10^(ΔL/10) to determine the number of oboes required, we get following:

N1 = number of oboes producing a sound intensity of 50 dB

N2 = number of oboes needed to produce a sound intensity of 60 dB

ΔL = difference in sound intensity = 60-50 = 10 dB

∵ N2/N1 = 10^(10/10) = 10

Since, N1 = 10 oboes

∴ N2 = N1 × 10 = 10 × 10 = 100

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Longer-term memory is our permanent storage place for information. Longer-term memory refers to the cognitive process through which information is stored for an extended period, allowing us to retain knowledge and experiences over time.

It is considered our permanent storage place for information because it enables us to remember and recall past events, facts, and skills beyond the immediate moment. Unlike short-term or working memory, which holds information temporarily for immediate use, longer-term memory involves the encoding, consolidation, and retrieval of information for long-lasting retention. This type of memory is organized in a filing system-like manner, where information is stored and categorized based on its relevance, significance, and connection to existing knowledge networks. It plays a crucial role in our ability to learn, make decisions, and navigate the world, as it helps us interpret and assign meaning to things we hear, see, and experience, contributing to our overall understanding and comprehension.

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Answer:

the acceleration of the rocket is: a=vemΔmΔt−g a = v e m Δ m Δ t − g .

Explanation:

I answered this before.

hope this helps! :)