why do poles of different heights placed in a straight line at different distances appear to be of the same height to an observer?

ahdt kmhlb,nm , ,GOLH,kt

The leaves move closer together when a charged test sample is brought close to the charged electroscope's ball. This proves that the electroscope charge and the test object have the same polarity.

An electroscope is an instrument that is used to detect and measure electric charge. It consists of two metal plates, usually made of gold or aluminum, which are connected to a metal rod. When a charged object is brought near the plates, the metal plates will move in response to the electric field, allowing the user to measure the amount of charge present. Electroscopes are used in a variety of scientific fields, such as physics, chemistry, and materials science. They are also used in laboratories to test the quality of electrical insulation, to detect the presence of electric charge, and to measure the amount of current in a circuit.

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Answer:

1000m=1km

simple :) . . .

Answer:

in the ball

Explanation:

potential energy is where an object has energy, always, but it isn't always moving, and when you drop the ball, it has kinetic energy.

Answer:

If an object moves in a straight line in the same direction, then the magnitude of average velocity of an object is equal to its average speed.

-TheUnknownScientist 72

When an object travels in a straight line or along a single, clearly defined path, the size of its average velocity is equal to its average speed.

While average speed just takes into account the numerical value of the displacement over time, regardless of direction, average velocity takes into account both the magnitude and direction of motion. The average velocity and average speed of an object are the same when its motion is unidirectional, or when it moves back and forth along a single line without changing directions. However, because direction is taken into account while calculating average velocity, the magnitude of the object's average velocity will often differ from its average speed if it changes direction or travels along a complicated course.

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The chemical formula for dinitrogen tetroxide is C) N204.

Nitrogen that exists in its diatomic form, which is also known as molecular nitrogen or nitrogen gas, is referred to as dinitrogen. This form of nitrogen has two nitrogen atoms joined by a triple covalent bond, which satisfies the Lewis electron rules by having two lone, nonbonding electron pairs, one on each Nitrogen atom.

Whereas Dinitrogen tetroxide is colourless, Nitrogen dioxide is brown. As the temperature drops, the brown color's intensity falls. As a result, a drop in temperature results in a rise in Dinitrogen tetroxide. As temperature drops, equilibrium is pushed to the Dinitrogen tetroxide side.

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The temperature at which the bar will fit exactly into a hole of constant width 10.005 cm if coefficient of linear expansion of steel is 11x10-6 C-1 is 95.5 °C

Δ L = L - Lo

Δ T = T - To

Δ L = Change in length

L = Initial length

Lo = Final length

α = Co-efficient of linear expansion

Δ T = Change in temperature

T = Initial temperature

To = Final temperature

L = 10 cm

Lo = 10.005 cm

T = 50 °C

Δ L = - 0.005 cm

α = 11 * \(10^{-6}\) / °C

Δ L / L = α Δ T

Δ L / α L + T = To

To = ( - 0.005 ) / 11 * \(10^{-6}\) * 10 + 50

To = 45.5 + 50

To = 95.5 °C

Therefore, the temperature at which the bar will fit exactly into a hole is 95.5 °C

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Answer:

The steel bar will fit exactly into the hole at a temperature of 95.45°C.

Explanation:

To find at what temperature the steel bar will fit exactly into a hole of a constant width, use the Linear Expansion equation.

\(\boxed{L_1-L_0=L_0 \cdot \alpha \cdot (T_1-T_0)}\)

where:

As we want to find the final temperature, rearrange the equation to isolate T₁:

\(T_1=\dfrac{L_1-L_0}{L_0 \cdot \alpha}+T_0\)

Given values:

Substitute the values into the equation:

\(\implies T_1=\dfrac{10.005-10}{10 \cdot 11 \times 10^{-6}}+50\)

\(\implies T_1=\dfrac{0.005}{0.00011}+50\)

\(\implies T_1=95.45^{\circ}\text{C}\; \sf (2\;d.p.)\)

Therefore, the steel bar will fit exactly into the hole of  constant width 10.005 cm at a temperature of 95.45°C (to two decimal places).

Note: The answer is not one of the options provided.

Answer:

So I think that the sound waves travel faster through water than air.

Explanation:

And the explanation would be that sound travels faster in more denser substances like water.

The number of hydrogen atoms in the sun is 1.19 x 10⁵⁷.

Mass of the sun, M = 2 x 10³⁰kg

Mass of hydrogen, m = 1.67 x 10⁻²⁷kg

There are roughly 1057 hydrogen atoms in the Sun. There are 1080 atoms in the known universe, which is equal to the product of the number of atoms per star (1057) and the estimated number of stars in the universe (1023).

The equation for the number of hydrogen atoms in the sun is given by,

n = M/m

n = 2 x 10³⁰/1.67 x 10⁻²⁷

n = 1.19 x 10⁵⁷

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Answer:

A screw

Explanation:

The threads of a screw act like an inclined plane to increase the distance over which you exert the input force.

The slope of 3.2913 indicates that for every one degree Fahrenheit increase in temperature.

Finally, the temperature when the number of chirps is 0 is not represented by the slope or the y-intercept, but rather by extrapolating the regression line to the x-axis.

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The average drift velocity of the electrons is  is approximately 6.25 x 10^6 m/s.

To find find the average drift velocity of the electrons, we have to make use of the drift velocity formula. The drift velocity formula is used to relate the average drift velocity of charge carriers in a conductor to the applied electric field. It is used to understand the motion of electrons when an electric current is flowing.

The drift velocity formula is:

\(I = nAvq\)

Where:

I is the current (in Amperes),

n is the density of charge carriers,

A is the cross-sectional area of the wire,

v is the average drift velocity of electrons,

q is the charge of an electron.

In this case, we have been given current as 10A, cross-sectional area of the wire is 1mm². The density of charge carriers in the wire is 1027/m³. So, by substituting all the given identities in the equation and rearranging the equation to find out "v", we get:

\(v = I / (nAq)\)

\(v = (10 A) / ((10^{27} /m^{3} ) * (1 * 10^{-6} m^{2}) * (1.6 * 10^{-19} C))\)

\(v = (10 A) / (1.6 * 10^{-12} A * m^{2} * C * 10^{27} /m^{3} )\)

\(v = 6.25 * 10^{6} m/s\)

Therefore, the average drift velocity of electrons in the wire is approximately 6.25 x 10^6 m/s.

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Answer:

Average drift velocity of the electrons is Approx. 6.25*10^6 m/s.

Given, Current= 10A

Cross sectional area = 1mm^2

Density of charge= 1027/m^3

Formula to find velocity= I/(nAq)

= 10/(1027*1*10^-6*1.6*10^-19)

=6.25*10^6m/s

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\( \huge \underline \mathtt \colorbox{cyan}{E=mc squared}\)

(E=mc^2)

m is mass

And c is a constant for speed of light

Answer:

One of the most famous and well-known equations in all of human history, E = mc^2, translates to "energy is equal to mass times the speed of light squared." In other words, wrote PBS Nova, energy (E) and mass (m) are interchangeable. They are, in fact, just different forms of the same thing.

Explanation:

this is right answer

Answer:

w = mg

w = 90 * 3.7

w = 333 N

hope it helps you

Answer:333N

Explanation:3.7 times 90 is equal to333 as gpe is mg and M is 90 and G is3. 7 so gpe is 333n

An open area between the two buildings is generally found behind the drawbridge of a castle.

A drawbridge is basically a long bridge made up of wood or sometime metal at the entrance of a castle or tower surrounded by a moat. It is basically for the leading to a gateway, capable of being raised or lowered to either restrict entry into the castle or allow someone in it, and often spanned a ditch or moat.

Depending on how big the castle is, when someone go over the drawbridge he or she can generally see an open area, between the buildings. And if we talk about the mechanism behind the drawbridge of the castle a typical arrangement would have the drawbridge immediately outside a gatehouse, consists of a wooden deck with single edge pivoting at the gatehouse threshold, so that in the heighted position the bridge would be flush against the gate, forming passage to entre.

Hence, an open area between the two buildings is generally found behind the drawbridge of a castle.

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Velocity and speed are both measures of how fast an object is moving, and they share the same units of measurement. The units used to measure both velocity and speed are:

a. m/s

b. km/h

d. mph

The most common units used to measure both velocity and speed are meters per second (m/s), kilometers per hour (km/h), and miles per hour (mph).Velocity is a vector quantity, meaning it has both magnitude (how fast an object is moving) and direction (the direction the object is moving in).

For example, a car traveling north at 50 km/h has a velocity of 50 km/h north.

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The  final speed of the combined masses is 0.186m/s

According to the law of collision, the sum of the momentum of the bodies before the collision is equal to the momentum after the collision.

Mathematically;

m1u1 - m2u2 = (m1+m1)v

Substituting the given parameters;

0.24(0.6) - 0.26(0.2) = (0.24+0.26)v

0.144 - 0.052 = 0.5v

0.092 = 0.5v

v = 0.092/0.5

v = 0.184m/s

Hence the final speed of the combined masses is 0.186m/s

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Answer:

30J

Explanation:

Given parameters:

Mass of box  = 1.5kg

Height  = 2m

Acceleration due to gravity  = 10N/kg

Unknown:

Change in gravitational potential energy  = ?

Solution:

 The change in gravitational potential energy is given as:

      ΔGPE  = mgh  

m is the mass

g is the acceleration due to gravity

h is the height

   ΔGPE  = 1.5 x 10 x 2  = 30J

Answer:

speed

Explanation:

The distance traveled and time, the average speed of an object can be calculated. The correct answer would be option (A).

Average speed is defined as the total distance traveled by an object divided by the total time it took to travel that distance. This is a measure of the overall pace of an object's motion over a period of time.

Instantaneous speed is the limit of the average speed as the time interval approaches zero. In other words, it's the rate of change of an object's position with respect to time at a specific moment.

Average acceleration is defined as the change in velocity (speed in a certain direction) divided by the time interval over which that change occurred. This is a measure of the rate of change of an object's speed over a period of time.

Instantaneous acceleration is the limit of the average acceleration as the time interval approaches zero. In other words, it's the rate of change of an object's velocity at a specific moment.

In summary, with the given information of distance traveled and time, the average speed of an object can be calculated, but the instantaneous speed, average acceleration, and instantaneous acceleration cannot be calculated.

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The complete question would be as:

If the distance an object travels and the time it takes to travel the distance are known, which of the following can be calculated?

A. Average speed

B. Instantaneous speed

C. Average acceleration

D. Instantaneous acceleration

there is no actual energy. And it still has a ways to go before it touches the earth, it contains both potential energy and kinetic energy since it is traveling. The brakes of a car heat up as it comes to

What does physics mean by potential energy?

Potential energy in physics is the energy that an item possesses as a result of its position in relation to other objects, internal tensions, electromotive force, or other elements.

What is the potential associated with it?

The gravitational potential, frequently represented by, which corresponds to the unit mass of energy as a function of position, is the associated potential. When two particles of mass M and m are separated by r, their gravitational potential energy is

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Answer:

Thank You So Much!❣️

Answer:

p = 50 kg·m/s

Explanation:

attached is a good way to remember the formula!

ANSWER

2304 mg

EXPLANATION

The rate is given in mg per minute. To find how much the brain's mass increases in one day we have to find how many minutes are in a day.

Assuming that a day has 24 hours and 1 hour has 60 minutes:

One day has 1440 minutes. Then, in one day the brain's mass increases:

The newborn baby's brain's mass increases 2304 mg in one day.

The formula relating kinetic energy and momentum of a particle is expressed as

KE = p^2/2m

let the actual momentum be p. Since the error measurement is 10%, the measurement of the momentum would be

p + 0.1p = 1.1p

Percentage error in the measurement of the kinetic energy is obtained by the formula,

% error = (KEf - KEi)/KEi x 100

where

KEf is the final kinetic energy measured error

KEi is the initial kinetic energy measured without error

Thus,

% error = [(1.1p)^2/2m - p^2/2m)]/p^2/2m x 100

% error = p^2/2m(1.1^2 - 1)/(p^2/2m) x 100

% error = 100(1.1^2 - 1)

% error = 21%

Answer:

mass

Explanation:

We see the definitions for each option.

Weight: Weight is the force with which earth attracts a body towards itself. Weight changes with the value of acceleration due to gravity.

Mass: Mass is defined as the quantity of matter contained in a body. It remains constant anywhere in the universe.

Time: The interval of time that passes on

Length: Distance between two specified points.

Hence, it is clear from the definition that the physical quantity that represents the quantity of matter is:

mass

Answer:

Answer choice B!

Explanation:

Study Island work

Answer:A

I DID THIS ON STUDYILSLAND

Answer:

C

Explanation:

add them all up

SIX           C

TWELVE  H

SIX            O

total = 24

Terrestrial planets are thought to have dense iron cores primarily due to their formation process and the differentiation of their materials.

During the early stages of planet formation, when dust and gas in a protoplanetary disk come together to form planets, heavier elements such as iron tend to sink towards the center due to their higher density. This process, called planetary differentiation, results in the formation of a dense metallic core at the center of the planet. Iron is one of the most abundant heavy elements in the universe, and its high density makes it more likely to sink towards the core during planetary formation. As the planet grows and accumulates more material, the iron-rich core becomes more prominent.

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Answer: hello the terms are missing but I have provided the answer ( the terms and matched them properly

answer :

Explanation:

This body wave is a compressional wave  : P WAVES

This body wave is a shear wave :  S  WAVES

This surface wave moves from side to side : L WAVES

This surface wave moves up and down. : R WAVES

A body wave is a type of wave that passes through the interior of the earth and they are classified as ; P and S waves while surface waves are seismic waves that travel near the earth's surface

This is a defective question. It was WRITTEN by someone who is unclear on the concepts.  DON'T try and answer it.

It's trying to get us to use Newton's second law ... F = m • a.

But that only tells us how much force must act ON THE CAR in order to accelerate it. (45 kg) • (4 m/s^2) = 180 newtons.

This is NOT the force exerted BY the car when it hits something. THAT force depends on its speed WHEN it hits, AND how long it takes for the wreckage to actually come to rest, AND how hard or soft the wall is.

DON'T try to answer this question. Your answer will be wrong, you won't understand why, and the teacher you try to argue with probably won't either.

============================================

More explanation:

Think about jumping off of a ladder in your back yard.  Several times.

Your mass is the same every time.  Your acceleration is the same every time . . . 9.8 m/s² down, the acceleration of Earth gravity, every time.

BUT ...

-- I'll bet you would rather land on wood than on concrete. The force of landing would be less.

-- I'll bet you would rather land on dirt than on wood. The force of landing would be less.

-- I'll bet you would rather land on grass than on dirt. The force of landing would be less.

-- I'll bet you would rather land on a pile of blankets than on dirt. The force of landing would be less.

-- I'll bet you would rather land on a trampoline than on a pile of blankets. The force of landing would be less.

-- I'll bet you would rather jump from a short ladder than from a tall one.  Your speed would be less when you landed, and the force of landing would be less.

==> Your mass is the SAME every time, and your acceleration is the SAME every time.  But the force when you hit is DIFFERENT every time.

The mass and acceleration of the car DON'T tell us the force of the hit when the car hits a wall.