What defines an element?
energy levels
electrons
neutrons
protons

An arrow is shot vertically upward from a platform 37ft high at a rate of 203ft/sec . The arrow will hit the ground after 12.7 seconds.

The formula you can use to solve this problem is:

h = -16t^2 + vt + h_0

where:

We know that the initial height of the arrow is 37 feet, the initial velocity of the arrow is 203 feet per second, and we need to find the time it takes for the arrow to hit the ground.

We can plug these values into the formula to get:

37 = -16t^2 + 203t + 37

Now we can solve for

-16t^2 + 203t = 0

We can factor the left-hand side of the equation to get:

-16t(t - 12.7) = 0

This means that either t = 0 or t = 12.7.

Since time cannot be negative, we know that t = 12.7 seconds.

Therefore, the arrow will hit the ground after 12.7 seconds.

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The coefficient of kinetic friction between the baserunner and the ground is 0.51.

The coefficient of kinetic friction between the base runner and the ground is calculated as follows;

μ = a/g

where;

v² = u² + 2as

a = (v² - u²)/(2s)

a = (8.451² - 2.322²)/(2 x 6.596)

a = 5 m/s²

μ = 5/9.8

μ = 0.51

Thus, the coefficient of kinetic friction between the baserunner and the ground is 0.51.

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The time required to cover the Moon to a depth of 1.20 meters with micrometeorites.

To find out how long it would take to cover the Moon to a depth of 1.20 meters with micrometeorites, we can calculate the volume of the Moon and then divide it by the volume of one micrometeorite. Let's break down the calculation step by step:

Calculate the volume of the Moon:

The average radius of the Moon is approximately 1.737 ×10⁶ meters. Using the formula for the volume of a sphere, V = (4÷3)πr³, we can calculate the volume of the Moon.

\(V_{moon}\) = (4÷3)π(1.737 × 10⁶)³

Calculate the volume of one micrometeorite:

The diameter of the micrometeorite is given as 1.30 ×10⁽⁻⁶⁾ meters, which means the radius is half of that.

\(r_{meteorite}\) = (1.30 × 10⁽⁻⁶⁾)÷2

Using the formula for the volume of a sphere, V = (4÷3)πr₃, we can calculate the volume of one micrometeorite.

\(V_{meteorite}\) = (4÷3)π((1.30 × 10⁽⁻⁶⁾)÷2)³

Calculate the number of micrometeorites needed to fill the Moon:

To find the number of micrometeorites required to fill the Moon, we divide the volume of the Moon by the volume of one micrometeorite.

\(N_{meteorites}\) = \(V_{moon}\) ÷ \(V_{meteorite}\)

Calculate the time to fill the Moon:

Since one micrometeorite strikes each square meter of the Moon each second, we can equate the number of micrometeorites needed to fill the Moon to the number of seconds it would take.

Time = \(N_{meteorites}\) ÷ (1 m²/s)

Convert seconds to years:

Finally, we convert the time in seconds to years by dividing by the number of seconds in a year (assuming 365.25 days in a year and 24 hours in a day).

\(Time_{years}\) = Time ÷ (365.25 days/year × 24 hours/day × 3600 seconds/hour)

Performing these calculations will give us the time required to cover the Moon to a depth of 1.20 meters with micrometeorites.

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Yes, 1 mL (milliliter) and 1 cc (cubic centimeter) are equivalent units of volume. This means they represent the same amount of volume and are interchangeable.

UNIT CONVERSION: This is the process of converting one unit of measurement to another equivalent unit. In the case of 1 mL and 1 cc, the conversion is simple because they are equal to each other, which makes it easy to convert between the two units.

It is important to understand that units of measurement serve as a standard for measuring quantities such as length, time, mass, and volume. The choice of unit depends on the particular context or application and what is most convenient for the person using it. In some cases, such as in medicine or science, volume is often measured in mL or cc, making unit conversion a crucial tool for accurate and precise measurement.

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Answer: The mesocyclone

Explanation: The unsaturated air, if moved upward, will be cooler than the surrounding air and it will sink. ... This convective action (that is, the circulation of air as a result of heat transfer) produces the huge clouds commonly associated with thunderstorms and tornadoes.

Hopes this help um pls mark me as brainliest

Answer:

action = reaction

land accepts

reaction force acts on the apple

Answer:

15 Newton

Explanation:

According to Newton's third law of motion, "Every action has a reaction which is equal in magnitude but opposite in direction" (Right now, we're not talking about direction, so we'll ignore it)

So,

Action Force = Reaction Force

Reaction Force = 15 N

The action force is by the Earth on the Apple, So the reaction force will be by the Apple on the Earth.

Constellation is a group of stars that appears to form a pattern or picture. Some of the constellations include Orion, Taurus, Canis Major etc.

Orion is located on the celestial equator and it can be seen throughout the world. This constellation is named after the hunter, in Greek mythology. It is one of the most obvious and recognizable constellations in the sky. Orion is most visible in the evening sky from January to April, during winter season in the Northern Hemisphere, and summer season in the Southern Hemisphere. In the tropics, the constellation moves at the zenith. Orion is bordered by Taurus to the northwest, and by other constellations in other directions.

Taurus is one of the constellations of the 12 zodiac signs. It is a large and prominent constellation in the Northern Hemisphere during winter. It is one of the oldest constellations. The International Astronomical Union gave a three-letter abbreviation for the constellation, as "Tau". During late November-early December, Taurus occupies a furthest point from the Sun and is visible the entire night. By late March, it sets at sunset and completely disappears behind the Sun's glare from May to July.

Canis Major is a constellation in the southern celestial hemisphere. It is a Latin name, which means 'greater dog' in contrast to 'Canis Minor' meaning 'lesser dog'. These both figures are commonly represented as following the constellation of Orion, the hunter, through the sky. Canis Major contains Sirius, the brightest star in the night sky, known as the "dog star". It is bright because of its proximity to the Solar System.

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Light source will pass through and form a shadow, when I hold the largest cardboard between the light source and the wall. Since, the cardboard is not so thick it will allow rays to pass through it.

Light rays always travel in a straight line. A shadow is formed when the light rays hit an opaque object. Sun is a natural source of light. The rays from the sun fall on objects on earth and forms shadows. Light rays do not interfere with each other if they come cross each other. Light rays travel from the direction of source to the direction of eye. They show property of reflection wherein after colliding a surface they trace their path back.

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Answer:

The correct answers are

The following statements are true about an object in two-dimensional projectile motion with no air resistance

D) The speed of the object is zero at its highest point.

E) The horizontal acceleration is always zero and the vertical acceleration is always a non-zero constant downward

Explanation:

A) The speed of the object is constant but its velocity is not constant.

False the vertical velocity increases on descent

B) The acceleration of the object is constant but its object is + g when the object is rising and -g when it is falling.

False, the acceleration is -g when the object is rising

C) The acceleration of the object is zero at its highest point.

False, the acceleration is constant in magnitude throughout the motion

D) The speed of the object is zero at its highest point.

True, the direction of motion changes at the highest point from hence the body comes to rest and the speed is zero

E) The horizontal acceleration is always zero and the vertical acceleration is always a non-zero constant downward

True, the horizontal acceleration has associated force during motion but the vertical acceleration is due to gravity which is constant downwards

Explanation:

Answer:

a)20 m,2s

Explanation:

Given

Initial velocity=20 m /sec

g=10 m/s square

v =0m/s

h =?

t =?

now,

v = U +gt

=v=20 +10t

Or,10t=20

Or,t=20

10

therfore ,2 s.

Again,

h=ut -1 gt square

2

Or, h=20×2-1×10(2)square (multiply and cut )2×5 =10

; 2

Or,40-5×4

therefore , 20m

Answer:

An acceleration of 5m/s^2 means that the velocity of a body is increasing by 5m/s per second in a certain direction

Explanation:

Answer:

The velocity of the ball at a height of 2.0 meters above the court is approximately 8.85 m/s

Explanation:

The given parameters of the ball are;

The mass of the ball, m = 0.63 kg

The height from which the ball is dropped, h₁ = 6.0 meters

The height at which the velocity of the ball is sought, h₂ = 2 meters

The initial potential energy of the ball, P.E. = m·g·h₁ = 0.63 × 9.8 × 6.0  = 37.044

The initial potential energy of the ball, P.E.₁ = 37.044 J

The potential energy of the ball, when the ball is at 2 meters above the court, P.E.₂ = m·g·h₂ = 0.63 × 9.8 × 2.0 = 12.348

The potential energy of the ball, when the ball is at 2 meters above the court, P.E.₂ = 12.348 J

From M.E> = P.E. + K.E.

Where;

M.E = The total mechanical energy of the ball = Constant

P.E. = The potential energy of the ball

K.E. = The kinetic energy of the ball

By the conservation of energy principle, we have;

The potential energy lost by the ball = The kinetic energy gained by the ball

The potential energy lost by the ball = P.E.₁ - P.E.₂ = 37.044 - 12.348 = 24.696

The potential energy lost by the ball = 24.696 J

The kinetic energy gained by the ball = 1/2·m·v² = 1/2×0.63×v²

Where;

v = The velocity of the ball

∴ The potential energy lost by the ball at 2.0 meters above the court = 24.696 J = The kinetic energy gained by the ball at 2.0 meters above the court = 1/2×0.63×v²

24.696 J = 1/2×0.63 kg ×v²

v² = 24.696 J / (1/2×0.63 kg) = 78.4 m²/s²

∴ v = √(78.4 m²/s²) = 8.85437744847 m/s

The velocity of the ball at a height of 2.0 meters above the court, v ≈ 8.85 m/s.

Answer:

tura paulo

Explanation:

sry if im wrong ;)

Answer:

B. Electron

Static charge is produced by electron transfer.

Explanation:

Answer A: The neutron does not possess a charge and is said to be neutral.

Answer D: Protons and neutrons never move from object to object.

Only negative charges can move freely from one object to another. The energy that comes from these charges particles is called electrical energy.

....

Hope this answer can help you.

The answer is an electron.

\( \huge \boxed {\mathfrak{ \color{gold}Answer ࿐ }}\)

The wave having the lowest frequency is :

=》A. (a)

Answer:

they go BOOM i seen a gas station do it

Explanation:

The given statement is true

Inertia is the tendency of an object to stay at rest or in motion

Answer:

c. 0.80

Explanation:

they will choose the path that has not resistance

Answer:

The difference between a solid and a liquid at the molecular level lies in the strength of the intermolecular attraction.

Explanation:

Solids and liquids have similar densities, so the tightness of the packing is not the difference.

The difference lies in the strength of the intermolecular (between different molecules) attraction. In solids, the intermolecular attractions are strong enough to hold the same molecules together with their neighbors, despite the random thermal vibrations. The same group of nearest neighbor molecules and second nearest and third nearest, and so on out to very large numbers, stays together. So the molecules are stationary, except for vibrations around an average position. That's solid.

the intermolecular forces are strong enough in liquids to keep nearest neighbors together only for short times before the thermal vibrations break apart the groupings. Thus the molecules are always close to each other, but don’t stay next to any particular other molecules, so the whole collection of it can easily flow, but with a specific volume. That’s a liquid.

In a gas, the intermolecular forces are too weak to hold the molecules near each other and the thermal random motion quickly splits up any short-term pairs. So it flows easily with no specific volume - the molecules are all approximately independent from each other.

In ionic solids, there are no specific molecules, but replace “molecules” above with “ions of opposite charge”

Answer:law of interia(1st law)

Explanation:

Answer:

Explanation:

SI units are interrelated in such a way that one unit is derived from other units without conversion factors. ... SI is used in most places around the world, so our use of it allows scientists from disparate regions to use a single standard in communicating scientific data without vocabulary confusion.

A helicopter is a type of aircraft which uses spinning blades ( wings) to fly .

Scientific investigation asks about a cause-and-effect relationship between two variables. Thus, the correct answer is (a).

Scientific investigation is intended to create a hypothesis and demonstrate its validity or lack thereof. Experiments must be conducted in order to test these hypotheses, and these experiments are planned in accordance with the discovery of a cause-and-effect relationship between the two variables under scientific investigation. In these experiments, the "cause" is variable upto various degrees, and the "effect" of the variance is noted. The experimental design, which will try to manipulate the causes to see how these manipulations impact the second variable, will thus be guided by knowledge of the cause-and-effect connection.

Observations are frequently the first step in a scientific investigation.

An observation is something that is discovered using the senses of humans or tools and measurement technologies that support the senses of humans. Important scientific discoveries may result from unintentional observations.

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"-m" represents a negative image distance which implies an inverted or upside-down image formation. Therefore the correct answer is (D) -m.

In optics, the notation "do" refers to object distance and "di" refers to image distance.

The sign convention for object and image distances is as follows:

- If the object distance (do) is positive, it indicates that the object is located on the same side as the incident light.

- If the object distance (do) is negative, it indicates that the object is located on the opposite side of the incident light.

- If the image distance (di) is positive, it indicates that the image is formed on the opposite side of the light.

- If the image distance (di) is negative, it indicates that the image is formed on the same side as the light.

In the given options, "-m" represents a negative image distance, indicating that the image is formed on the same side as the light.

This implies an inverted or upside-down image formation.

Therefore, option (D) -m represents an upside-down image.

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Iron oxide cement produces bright-red and yellow colors in some sandstones.

The coloration in sandstones is often influenced by the presence of different minerals and pigments in the cement that binds the sediment grains together. Iron oxide, specifically hematite (Fe2O3) and goethite (FeO(OH)), is a common cementing material found in sandstones. When present in higher concentrations, these iron oxide minerals can impart bright-red and yellow hues to the sandstone.

The colors of iron oxide cement in sandstones are a result of the selective absorption and reflection of light. Hematite and goethite have specific light absorption properties that allow them to absorb certain wavelengths of light, particularly in the blue and green regions of the visible spectrum. As a result, the sandstone appears red or yellow, as these colors are the wavelengths of light that are not absorbed and are instead reflected or transmitted.

The specific shades and intensity of red and yellow colors in sandstones can vary depending on factors such as the concentration of iron oxide minerals, grain size, and the presence of other minerals or impurities. Different geological processes and environmental conditions during the formation of sandstones can contribute to the variation in coloration.

The bright-red and yellow colors observed in some sandstones are typically caused by the presence of iron oxide cement, specifically hematite and goethite. The selective absorption and reflection of light by these minerals result in the sandstone appearing red or yellow. The exact coloration may vary based on factors such as the concentration of iron oxide, grain size, and geological processes involved in the sandstone's formation.

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If the Earth rotated towards the west rather than towards the east, the gyres in the northern hemisphere would circulate clockwise instead of counterclockwise.

The direction of gyres in the ocean is determined by the Coriolis effect, which is a result of the Earth's rotation.

In the northern hemisphere, the Coriolis effect causes the gyres to circulate counterclockwise, while in the southern hemisphere, they circulate clockwise. This is because as the Earth rotates towards the east, objects in the northern hemisphere are deflected to the right, while objects in the southern hemisphere are deflected to the left.

If the Earth were to rotate towards the west, the Coriolis effect would still cause objects in the northern hemisphere to be deflected to the right, but now they would be deflected towards the west. This would cause the gyres in the northern hemisphere to circulate clockwise instead of counterclockwise.

Overall, the direction of ocean gyres is dependent on the direction of the Earth's rotation and the Coriolis effect.

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Answer:

she improved upon the works of plato

Answer: A she became a teacher at Alexandria

Explanation:

The lunar phases are caused by the relative positions of the Earth, Moon, and Sun. The Moon orbits the Earth once every 29.5 days, and as it does so, we see different portions of the illuminated side of the Moon. These different portions of the Moon are called phases. There are eight primary phases of the Moon: New Moon, Waxing Crescent, First Quarter, Waxing Gibbous, Full Moon, Waning Gibbous, Third Quarter, and Waning Crescent.

An eclipse occurs when one celestial object moves into the shadow of another. There are two types of eclipses: solar and lunar. A solar eclipse occurs when the Moon passes between the Earth and the Sun, blocking the Sun's light and casting a shadow on the Earth. A lunar eclipse occurs when the Earth passes between the Sun and the Moon, casting a shadow on the Moon.

To explain these phenomena, teachers can use different methods such as diagrams, animations or models. For example, teachers can use a lamp to represent the Sun, a small ball to represent the Moon and a larger ball to represent the Earth. By moving the Moon around the Earth, the phases of the Moon can be demonstrated. To show eclipses, the Moon can be moved between the Earth and the Sun, or the Earth can be moved between the Sun and the Moon.

Using these methods can be an effective way of demonstrating the phases and eclipses to students. Teachers can also use animations and videos to help students visualize these events. It is important to note that these models and demonstrations are not perfect representations of the actual events, as they simplify the complex motions and distances involved in the interactions between celestial bodies.

Name of person taught: John

John said: "I learned a lot from the model that my teacher showed me. It was very helpful to see how the phases of the Moon and eclipses occur. The demonstration with the lamp and the balls really helped me understand the concepts. I also appreciated the videos that my teacher showed me, as they helped me see the events from different perspectives."

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Answer:FASTEST AND BEST ANSWER GETS BRAINLIEST AND THANKS!

Include a picture, video, or diagram of your model of lunar phases or eclipses.

Provide a description of how you made your model and how it demonstrates eclipses or lunar phases.

Include a one-paragraph reflection on the success of your model in explaining your event.

Include the name of the person you taught about your event and that person's description of what they learned from your model.

Explanation:

wawa wawa

That's pretty simple, we have;

We know that;

And..

Put all the values;

Therefore, the total time taken will be 92.85 sec.