Oxygen is the most abundant gas in Earth’s atmosphere true or false

A.  Time taken for swing of a pendulum is 2.3 seconds per swing.

B. To find the time for one swing more accurately, the student can increase the number of swings, use a stopwatch with higher precision, minimize external disturbances, and repeat the experiment to calculate the average time.

The time taken for 20 swings of a pendulum is 46 seconds. To find the time for one swing, we need to divide the total time by the number of swings.

a. Time for one swing: 46 seconds / 20 swings = 2.3 seconds per swing.

To find the time for one swing more accurately, the student can employ the following techniques:

1. Increase the number of swings: By measuring the time for a larger number of swings, the student can reduce the impact of measurement errors and obtain a more precise average time. For example, measuring the time for 100 swings and then dividing by 100 would provide a more accurate estimate.

2. Use a stopwatch or timer with higher precision: Using a stopwatch or timer that provides more decimal places or higher precision can help capture smaller time intervals more accurately. This can reduce rounding errors and improve the accuracy of the measurement.

3. Minimize external disturbances: To ensure accurate timing, it is important to minimize external disturbances that may affect the pendulum's motion, such as air drafts or vibrations. Conducting the experiment in a controlled environment can help reduce these disturbances and enhance measurement accuracy.

4. Repeat the experiment: Performing the measurement multiple times and calculating the average time can help account for any inconsistencies or random errors in the measurements. This can lead to a more reliable and accurate estimate of the time for one swing.

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Answer: .0380575J

Explanation:

The coffee filter originally only had potential energy, which can be found by:

PE = m * g * h → PE = .0013 * 9.8 * 3 = .03822 J

*Note the mass must be in kg!!!

All of this energy should be converted to kinetic energy, but the air molecules take some of the energy; the energy they gain can be found by finding how much energy the filter has at the bottom of its fall, and subtracting this from the original energy to see how much was lost;

All of the energy at the bottom equals kinetic energy, which can be found by:

KE = 1/2 * m * v^2 → KE = 1/2 * .0013 * .5^2 = .0001625 J

Thus, the air gained .03822 - .0001625 = .0380575J :)

To determine the magnetic field at point P in the given figure, we can use the Biot-Savart Law.

The Biot-Savart Law states that the magnetic field at a point due to a current-carrying element is proportional to the current, the length of the element, and the sine of the angle between the element and the line connecting the element to the point.

In this case, we have two current-carrying arcs and two radial lines. Let's consider each part separately:

1. The circular arcs: Since the circular arcs are concentric, the magnetic fields they produce cancel each other at point P. Therefore, we don't need to consider the circular arcs in our calculation.

2. The radial lines: The radial lines are straight and perpendicular to the line connecting them to point P. The magnetic field produced by a straight current-carrying wire at a point on the wire is given by the equation:

B = (μ₀ * I) / (2π * r)

where μ₀ is the permeability of free space, I is the current, and r is the distance from the wire to the point.

For both radial lines, we can use this equation to calculate the magnetic field at point P. The contribution from each line will have a magnitude of:

B_line = (μ₀ * I) / (2π * r_line)

Since the two lines are parallel and carry the same current, their magnetic fields add up. Therefore, the total magnetic field at point P is:

B_total = 2 * B_line = 2 * (μ₀ * I) / (2π * r_line)

Finally, we can substitute the given values into the equation to calculate the magnetic field at point P.

Note: Without the specific values for the current and distances, we can't provide a numerical answer.

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Answer:

Force(f)= mass x acceleration

Acceleration (a) is the rate of change in velocity.

F=4N

M=0.2kg

a=F/M

a=4/0.2

a=20m/s^2

Explanation:

Answer:

the answer would be 20 m/s^2

Explanation:

Answer:

The correct answer is: Energy is conserved, and it cannot be created or destroyed. This is known as the law of conservation of energy, which states that in a closed system, the total amount of energy remains constant and cannot be created or destroyed, only transformed from one form to another. This means that energy can be converted from one form to another, such as from potential energy to kinetic energy, but the total amount of energy in the system remains the same.

A decrease in the price level results in an increase in the quantity of real GDP demanded because a lower price level stimulates consumption, investment, and net exports.

When the price level decreases, it means that the general level of prices for goods and services in the economy has fallen. This can have several effects:

Consumption: With lower prices, consumers can purchase more goods and services for the same amount of money. This increase in purchasing power encourages higher levels of consumption, leading to an increase in the quantity of real GDP demanded.

Investment: Lower prices can also reduce the cost of production for businesses. This can incentivize firms to invest in new projects or expand their existing operations, as they can produce goods and services at a lower cost. Increased investment boosts economic activity and contributes to higher real GDP demand.

Net Exports: A decrease in the price level can make domestic goods and services relatively cheaper compared to foreign goods and services. This can lead to an increase in exports as foreign consumers find the goods more affordable. At the same time, it can discourage imports as domestic consumers may choose cheaper domestic alternatives. This increase in net exports contributes to an overall increase in the quantity of real GDP demanded.

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Acceleration is the rate of change of velocity over time. The diagram that shows the effect of cutting acceleration by half without changing initial velocity is graph (c)

The equation is given as:

\(v = 2t + 4\)

The first equation of motion is:

\(v = u + at\)

By comparing both equations, we have:

\(u = 4\) --- initial velocity

\(a = 2\) --- acceleration

When the acceleration is cut in half, the new acceleration is:

\(a_{new} = \frac a2\)

\(a_{new} = \frac 22\)

\(a_{new} = 1\)

So, the equation of velocity is:

\(v = u + at\)

\(v = 4 + 1 \times t\)

\(v = 4 + t\)

When \(t = 0\)

\(v = 4 + 0 = 4\)

When \(t = 1\)

\(v = 4 + 1 = 5\)

The graph of velocity that satisfies \(v = 4 + t\) and the values of time (t) and velocity (v) tested above is (c).

See attachment for the diagram (graph)

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The maximum height of the ball is approximately 6.096 m and the work done by gravity is -4.95 J.

Given information,

m = 0.071 kg

V₀ = 11 m/s

(a) Finding the maximum height:

The initial kinetic energy of the ball is converted into potential energy at its maximum height.

Initial kinetic energy = Potential energy at maximum height

(1/2)mv₀² = mgh

(1/2)(0.071 kg)(11 m/s)² = (0.071 kg)(9.8 m/s)h

h = (0.5)(11²)/(9.8) ≈ 6.096 m

Part (b) Calculating the work done by gravity:

The work done by gravity during the ball's flight to its maximum height is equal to the change in potential energy. Since the gravitational potential energy is defined as zero at the initial height, the work done by gravity is equal to the negative of the potential energy at the maximum height.

Wg = -mgh

Wg = -0.071 × 9.8 × 6.096

Wg ≈ -4.95 J

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Answer:

 freezing melting sublimating  x y

 x and

Explanation:

To drop a table of states of matter the best headings must be

table name: matter state

    freezing melting sublimation x y

This order goes from the solid state to the gaseous state, which is obtained by introducing heat into the system

Answer: D on edge

X: Heat Is Absorbed

Y: Heat Is Released

Explanation:

sublimation and melting are both absorbing heat(aka getting warmer)as they change state while freezing and deposition are releasing heat(aka getting colder)as they change state

Answer:

What is the figure? please provide

Answer:

If an object has a fast velocity, the dots on a ticker tape diagram will be far apart.

In accordance with Fleming's left-hand rule, the wire tends to travel perpendicular to the plane of the paper upward when the magnetic field is directed from N-pole to S-pole.

Curling your fingers and directing your right thumb in the direction of the wire's current will help you find it. Your fingers will curl in the same direction due to the magnetic field surrounding the wire.

Certain magnetic field characteristics Straight current-carrying conductor lines: Around the conductor, it creates concentric circles. It is situated in a plane parallel to conductor.

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Answer:

An object that weighs 20 kg

Explanation:

Acceleration and mass are indirectly proportional.

Answer:

The speed at which a planet orbits the Sun changes depending upon how far it is from the Sun. When a planet is closer to the Sun the Sun’s gravitational pull is stronger, so the planet moves faster. When a planet is further away from the sun the Sun’s gravitational pull is weaker, so the planet moves slower in its orbit.

To experimentally determine the volume of a floating irregularly shaped object, you can use the displacement method. Here is a step-by-step procedure are  Prepare a suitable container,   Measure the initial water level,Submerge the object,  Measure the final water level, Calculate the volume.

Here is a step-by-step procedure :

   Repeat for accuracy: To enhance accuracy, repeat the entire process multiple times. Take measurements for each trial and calculate the average volume to minimize any measurement errors or inconsistencies.By following the displacement method outlined above, you can determine the volume of an irregularly shaped object that floats based on the amount of water it displaces.

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Answer:

d. silicone is shiny and is a poor conducted of electricity​

The best option that describes an example of a chemical property of an element is silicone is shiny and is a poor conductor of electricity​. Option D is correct.

The chemical properties of elements are those properties that are noticeable during the course of a chemical reaction.

Aluminum is solid but not at room temperature. The elements that are solid at room temperature are iron, zinc, gold, and silver. Hence option is incorrect.  The same is applicable to options B and C.

The best option that describes an example of a chemical property of an element is silicone is shiny and is a poor conductor of electricity​

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Answer:

1. Beryllium

2. 4

3. 9

4. 0

Explanation:

• The element shown in the image is beryllium because the atom shown contains four protons and the only element with four protons is beryllium.

• The atom's atomic number is 4, because atomic number is the number of protons of an element, and the atom shown contains 4 protons.

• The mass number of the atom is 9. Mass number is the sum of the number of protons and neutrons in the nucleus of an atom, and the atom shown contains 4 protons and 5 neutrons; therefore its mass number is (4 + 5 =) 9.

• The charge of the atom is 0. This is because it has 4 protons which give it a +4 charge, but it also has 4 electrons which give it a -4 charge. Therefore its net charge is: 4 + (-4) = 0.

Answer:ultrasound

Explanation:

So the slope of a position graph has to equal the velocity. This is also true for a position graph where the slope is changing. ... This means that the velocity is negative and the object is moving in the negative direction

hope it helps you

Answer:

The angle of the launch is 17.09 degrees.

Explanation:

Given that,

The initial speed of a cannon is 100 m/s

It is launched at some angle and it lands after being in the air for 6 s.

We need to find the angle of the launch.

The time taken by the projectile to reach the ground is called the time of flight. It is given by the formula as follows :

\(T=\dfrac{2u\sin\theta}{g}\)

Here, \(\theta\) = launch angle

\(\sin\theta=\dfrac{Tg}{2u}\\\\\sin\theta=\dfrac{6\times 9.8}{2\times 100}\\\\\theta=\sin^{-1}(0.294)\\\\\theta=17.09^{\circ}\)

Hence, the angle of the launch is 17.09 degrees.

Answer:

I think the answer would be c

Explanation:

A. is not scientific

B. is subjective, so it can't be scientific.

C. can be studied with an experiment

D. relates to regulations, not science

Lo que sucede es que la sopa se comienza a enfriar. La temperatura es una función del calor al cual es sometido un cuerpo/sistema.

El calor se refiere a la cantidad de energía térmica que puede ser transferida entre dos sistemas/cuerpos cuando dichos sistemas/cuerpor entran en contacto.

Para que haya transferencia de calor es necesario que ambos objetos se encuentren a diferentes temperaturas.

El calor se define como un tipo de propiedad extensiva porque la modificación en la temperatura de un cuerpo durante la transferencia de calor depende de la cantidad de moléculas presentes en el sistema.

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The can collapses because of the difference in air pressure between the inside and outside of the can and the decrease in air pressure inside the can caused by the condensation of the steam.

Here when the teacher cools the can, some of the steam turns back into water, and as a result, the air pressure inside the can decreases. The reason for this is due to the collisions as when the steam condenses back into water, due to a decrease in the air pressure,

Hence, the can collapses because of the difference in air pressure between the inside and outside of the can and the decrease in air pressure inside the can caused by the condensation of the steam.

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The base of table is "1.08856 m" far away from the ball land.

Given:

Distance travelled by ball,

Initial velocity,

Acceleration,

Constant speed,

As we know the formula,

→ \(S = ut+\frac{1}{2}at^2\)

By substituting the values, we get

→ \(1.2=\frac{1}{2}\times 9.8t^2\)

→ \(1.2 = 4.9 t^2\)

→    \(t = \sqrt{\frac{1.2}{4.9} }\)

→      \(= 0.4948 \ seconds\)

Let,

→ \(x = 2.2\times t\)

     \(= 2.2\times 0.4948\)

     \(= 1.08856 \ m\)

Thus the solution above is right.

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Answer:

1 casparian strips are present in the root of endodermis.

2 the endarch condition is the character fature of stem.

In the game of volleyball, low intensity is often used during warm-up exercises or cool-down sessions.

These exercises are designed to help players get their bodies warmed up and ready to play, or to help them cool down after a game or practice. There are several low-intensity exercises that are commonly used in volleyball, including stretching, jogging, and light calisthenics.Stretching is a key part of any volleyball warm-up routine. This helps to get the blood flowing to the muscles and prepares them for the more intense exercises that are to follow. Some of the most common stretching exercises include hamstring stretches, quad stretches, and shoulder stretches. These exercises help to improve flexibility and range of motion, which can reduce the risk of injury during the game.Jogging is another common low-intensity exercise that is used in volleyball.

This helps to get the heart rate up and prepare the body for more intense activities. Jogging can also help players to develop endurance and stamina, which can be critical in the later stages of a game or tournament.Light calisthenics, such as jumping jacks, sit-ups, and push-ups, can also be used to warm up or cool down. These exercises are designed to help improve strength and endurance while also promoting flexibility and range of motion. Players can choose from a variety of different exercises to create a customized workout routine that meets their specific needs and goals.Overall, low-intensity exercises are an important part of any volleyball training program. They help to prepare the body for more intense activities while also promoting flexibility, endurance, and strength. By incorporating these exercises into their training routine, volleyball players can improve their overall fitness and performance on the court.

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the torque about the pivot due to the weight of Gilles on the seesaw is equal to (w/3) times the length of the seesaw (d).

To find the torque, T, about the pivot due to the weight, w, of Gilles on the seesaw, we need to use the equation T = F x d, where F is the force applied and d is the perpendicular distance between the force and the pivot.

In this case, the weight of Gilles (w) is the force applied, and the perpendicular distance between Gilles and the pivot is (d/3). Therefore, the torque can be calculated as follows:

T = w x (d/3)

We can simplify this equation by multiplying w by (1/3) and getting:

T = (w/3) x d

So, the torque about the pivot due to the weight of Gilles on the seesaw is equal to (w/3) times the length of the seesaw (d).
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Answer:

Acceleration is zero

Explanation:

if the acceleration is zero, then the velocity-time graph is a horizontal line (i.e., the slope is zero). If the acceleration is positive, then the line is an upward sloping line (i.e., the slope is positive).

Power sources that are connected in parallel should have the same voltage output. This statement is true.

What does it mean when we say two power sources are connected in parallel?  Power sources are connected in parallel to increase the current output. This means that the positive terminals of the power sources are connected to the other positive terminals, and the negative terminals of the power sources are connected to the other negative terminals. This results in the voltage output remaining the same, but the current output increasing. This is useful when more current is required for a particular application. To summarize, when power sources are connected in parallel, the voltage output should remain the same, and the current output should increase.

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