A large bed sheet is held vertically by two students. A third student, who happens to be the star pitcher on the baseball team, throws a raw egg at the sheet. Explain why the egg does not break when it hits the sheet, regardless of its initial speed. (If you try this demonstration, make sure the pitcher hits the sheet near its center, and do not allow the egg to fall on the floor after being caught.)

The correct answer is D. Amount of time and area of physical contact between the substances.

Explanation:

Heat transfer refers to the flow of thermal energy or heat between two or more objects. This process involves multiple factors and implies heat from the hottest object goes to the coldest one until there is an equilibrium. To begin, heat transfer depends on the amount of thermal energy in the objects because objects must have a different amount of thermal energy for heat to flow.

Besides this, the amount of energy that flows depends on the time and the contact between the substances of objects. Indeed, objects need to be in contact or close to each other for heat to transfer, and the time needs to be enough for the process to occur. For example, if you place a pot over the fire just for a few seconds it is likely the heat transferred is minimal, which does not occur if you leave the pot more time. At the same time if the pot is in close contact with fire more heat will be transferred.-

Answer:

the answer is D on edginuity.

Explanation:

Answer:

x10 - 6 +(8+6-4)= 10

10m -10x y0

The mass of the rock with a kinetic energy of 113J and a speed of 6.2m/s is approximately 5.88 kilograms.

Kinetic energy is simply the energy a body possesses due to its motion;

It is expressed as;

K.E = 1/2 × m × v²

Given the data in the question;

To determine the mass of the rock, plug the given values into the Kinetic energy formular and solve for m.

K.E = 1/2 × m × v²

113kgm²/s² = 1/2 × m × ( 6.2m/s )²

113kgm²/s² = 1/2 × m × 38.44m²/s²

113kgm²/s² = m × 19.22m²/s²

m = 113kgm²/s² / 19.22m²/s²

m = 5.88kg

Therefore, the mass of the rock is 5.88 kilograms.

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The electron will be moving at a speed of approximately 1.37 x 10^6 m/s when it hits the positive plate.

The speed of an electron when it hits the positive plate of a parallel-plate capacitor can be calculated using the principles of energy conservation. When the electron leaves the negative plate of the capacitor, it experiences a repulsive force due to the electric field between the plates.

As it moves towards the positive plate, this repulsive force does work on the electron, converting its potential energy to kinetic energy. The potential energy of the electron is given by the formula PE = qV, where q is the charge of the electron and V is the potential difference across the plates.

In this case, the potential difference is 750 V.

The kinetic energy of the electron is given by the formula KE = (1/2)mv^2, where m is the mass of the electron and v is its velocity.

According to the principle of energy conservation, the initial potential energy of the electron is equal to its final kinetic energy:

qV = (1/2)mv^2

Solving for v, we can find the velocity of the electron. Since the electron starts from rest, its initial velocity is 0. Plugging in the values, we find that the electron will be moving at a speed of approximately 1.37 x 10^6 m/s when it hits the positive plate.

It's important to note that this calculation assumes ideal conditions and neglects any effects such as air resistance or deviations from an ideal parallel-plate capacitor.

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Answer:

D. 2.5 kg•m/s

Explanation:

Given the following data;

Mass = 1kg

Velocity = 2.5m/s

To find momentum;

Momentum can be defined as the multiplication (product) of the mass possessed by an object and its velocity. Momentum is considered to be a vector quantity because it has both magnitude and direction.

Mathematically, momentum is given by the formula;

Momentum = mass * velocity

Substituting into the equation, we have;

Momentum = 1 * 2.5

Momentum = 2.5kgm/s

The true statements about the Hubble Extreme Deep Field image are:

The Hubble Extreme Deep Field image is a testament to the immense scale and diversity of our universe. By capturing thousands of galaxies at various stages of development, the XDF allows astronomers to study the intricate processes of galaxy formation and evolution, ultimately enhancing our understanding of the cosmos.

The Hubble Extreme Deep Field (XDF) image is a remarkable snapshot of our universe, showcasing the farthest and most diverse celestial objects. This image contains approximately 5,500 galaxies, with some dating back to just 450 million years after the Big Bang. The XDF is a combination of observations taken by the Hubble Space Telescope over a period of ten years, focusing on a small region of the sky.

The XDF's depth and clarity reveal a wealth of information about the galaxies present in the image. Observing galaxies at different stages of development helps astronomers understand the processes involved in galaxy formation and evolution. The image contains a mix of spiral, elliptical, and irregular galaxies, each with their unique characteristics and histories.

Furthermore, the XDF highlights the vast scale of the universe, as many of the galaxies captured in this image are billions of light-years away from Earth. This vast distance means that the light we see from these galaxies started its journey billions of years ago, providing us with a glimpse into the universe's distant past.

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Complete Question:

Consider the first image shown in the video, which is the Hubble Extreme Deep Field. Which of the following statements about this image are true? Select all the true statements. The galaxies in this image are part of a large galaxy cluster, bound together by gravity. Careful study of the image shows that the youngest galaxies were mostly irregular in shape. We see the more distant galaxies as they were when they were quite young. ООО Careful study of the image shows that all present-day galaxies are spirals. The image includes galaxies that are elliptical, spiral, and irregular.

Therefore, the angle between vectors `u` and `v` is 90°.

To find the angle between two vectors, we can use the formula:

`cos(θ) = (u . v) / (||u|| ||v||)`

Where u and v are vectors, `.` is the dot product of vectors and || || is the magnitude of a vector.θ is the angle between the two vectors.

In this problem, we need to find the angle between vectors `u` and `v`.

We have the following vector

s:u = (2, 3, 0) and v = (3, −2, 1)

Let's find the dot product of vectors `u` and `v`.u .

v = 2 × 3 + 3 × (−2) + 0 × 1

= 6 − 6 + 0

= 0

Let's now find the magnitudes of vectors `u` and `v`.||u|| = √(2² + 3² + 0²) = √(13) and

||v|| = √(3² + (−2)² + 1²)

= √(14)

Now, we can use the formula to find the angle between vectors `u` and `v`.cos(θ) = (u . v) / (||u|| ||v||)cos(θ)

= 0 / (√(13) × √(14))cos(θ)

= 0θ

= cos⁻¹(0)θ

= 90°

The angle between the vectors u = (2, 3, 0) and v = (3, −2, 1) is 90 degrees.

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Answer:

No.

Explanation:

No, increasing the frequency of a wave will not increase it's wavelength. Rather it will decrease the wavelength because frequency and wavelength are inversely related.

According to Formula:

v = f(lemda)

If the speed is kept constant to find the relationship between f and wavelength.

=> f is inversely propotional to wavelength.

Hope this helps!

Have a great day!

Answer:

Explanation:

chemical energy  :)   yay...  we can live  :D  

Explanation:

I would conduct a research program to observe and analyze the spectra of galaxies to gather information about their composition and motion.

With my limited observing time on the world's largest telescope, I would focus on collecting spectral data from various galaxies. Spectroscopy allows astronomers to analyze the light emitted by celestial objects and identify the elements present in their composition. By observing the spectra of galaxies, I could look for distinct patterns or signatures that could differentiate between the two hypotheses.

In the case of the Nebular Hypothesis, which suggests that spiral galaxies are merely nebulae within our own Milky Way, the spectral data would likely exhibit similarities to known nebulae. It would show characteristic emission lines associated with ionized gases, such as hydrogen or oxygen. If this were the case, it would support the notion that spiral galaxies are part of our own galaxy.

On the other hand, if the spectral data revealed a different pattern, such as absorption lines indicative of stars or stellar processes, it would lend support to the Island Universe Hypothesis. This hypothesis proposes that spiral galaxies are distinct, independent entities scattered throughout the universe. The presence of absorption lines associated with specific chemical elements or molecules commonly found in stars would suggest that spiral galaxies are not just nebulae but actual galaxies in their own right.

By carefully analyzing the spectral data collected from various galaxies, I would be able to compare their compositions and identify any significant differences that would help discriminate between the two hypotheses. This research program offers the best chance of success because it leverages the power of spectroscopy to provide concrete evidence regarding the nature of spiral galaxies, regardless of the absence of Cepheid variables in Andromeda.

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The dinosaurs first appeared in the Mesozoic and the first mass extinction occurred during the Paleozoic. Moreover, humans first appeared in the Cenozoic.

The dinosaurs emerged during the Triassic Period of the Mesozoic Era, approximately 220-225 million years ago.

The first mass extinction occurred in the Ordovician Period (the second period of the Paleozoic Era).

The Cenozoic is the current geological Era that encompasses the last 60 million years.

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The amplitude of the gradient in combination with the receiver bandwidth determines the slice thickness.

The gradient in magnetic resonance imaging (MRI) is used to spatially encode the signals and create different slice locations. The gradient's amplitude, along with the receiver bandwidth, plays a crucial role in determining the slice thickness.

The gradient amplitude controls how quickly the magnetic field changes over a given distance, affecting the spatial resolution. Higher gradient amplitudes lead to sharper image slices but can also increase the slice thickness.

On the other hand, the receiver bandwidth influences the frequency range that can be captured, affecting the signal-to-noise ratio and image quality.

By adjusting the amplitude of the gradient and optimizing the receiver bandwidth, radiologists and technicians can control the slice thickness to achieve the desired balance between resolution and image quality in MRI scans.

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Answer:

i know i'm way late. i'm so sorry but the answer is b not c. i just took the test and got 90% this one is wrong. it's B

Explanation:

just took the test.

hope this helps!

have a good day/ night

When a branch is added to a parallel circuit, the total resistance decreases, so the current in the circuit increases.

A parallel circuit is defined as the type of circuit in which the resistors are connected in parallel such that the current flowing through each of them is different.

Here,

The given circuit is connected in parallel combination of resistors. The current has different pathways to flow through. The voltage applied across each resistors will be the same.

Consider a parallel resistance circuit having a combination of n number of resistors with resistance R. The effective resistance of the parallel circuit can be given as,

1/Reff = 1/R₁ + 1/R₂ + 1/R₃ +....1/Rₙ

Since, the resistance is same on all resistors, we can write,

Reff = R/n

So, when adding a branch, the number of resistors, n increases. As a result, the effective resistance of the circuit decreases.

According to Ohm's law, as the resistance of a circuit decreases, the flow of current through the circuit increases.

Hence,

When a branch is added to a parallel circuit, the total resistance decreases, so the current in the circuit increases.

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The kinetic energy of the boulder when it is 1000 meters above the ground is 1,960,000 Joules.

The equation: gives the kinetic energy of an object.

Kinetic Energy is equal to (1/2)*matter*velocity2.

The boulder in this instance is 1000 metres above the surface, which indicates that it has gravitational potential energy. This potential energy is changed into kinetic energy as it descends.

The boulder's potential energy is supplied by: when it is 1000 metres above the ground.

Potential Energy equals mass times gravity times height.

Potential Energy = 200 kg x 9.8 m/s2 x 1000 m

1,960,000 Joules are equal to potential energy.

This potential energy is transformed into kinetic energy as the boulder falls. All of the potential energy is changed into kinetic energy when it touches the ground.

It's vital to note that this estimate makes the assumption that there won't be any energy lost because of things like friction or air resistance. These elements would have an impact on the boulder's actual kinetic energy when it hits the ground in a real-world setting.

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The primary difference between speed and velocity is that speed is a scalar quantity that describes how fast an object is moving, while velocity is a vector quantity that describes how fast an object is moving in a particular direction

Speed and velocity are two critical concepts in physics. They are used to describe the motion of an object. While both describe how fast an object is moving, there are some fundamental differences between the two. Let's explore these differences.

What is speed?

Speed is a scalar quantity that describes how quickly an object moves. It is measured in meters per second (m/s) or kilometers per hour (km/h).

Speed can be calculated using the following formula:

speed = distance ÷ time

For example,

if an object covers a distance of 150 meters in 10 seconds, its speed can be calculated as follows:

Speed = distance ÷ time= 150 meters ÷ 10 seconds= 15 meters per second (m/s)

What is velocity?

Velocity, on the other hand, is a vector quantity that describes how fast an object is moving in a particular direction. It is measured in meters per second (m/s) or kilometers per hour (km/h).

Velocity can be calculated using the following formula:

velocity = displacement ÷ time

For example, if an object travels a displacement of 150 meters in 10 seconds in a specific direction, its velocity can be calculated as follows:

Velocity = displacement ÷ time= 150 meters ÷ 10 seconds= 15 meters per second (m/s) in a specific direction.

In conclusion, the primary difference between speed and velocity is that speed is a scalar quantity that describes how fast an object is moving, while velocity is a vector quantity that describes how fast an object is moving in a particular direction.

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Answer:

This will require 266.9 of heat energy.

Explanation:

To calculate the energy required to raise the temperature of any given substance, here's what you require:The mass of the material, m The temperature change that occurs,  ΔT The specific heat capacity of the material,

c

(which you can look up). This is the amount of heat required to raise 1 gram of that substance by 1°C.

Here is a source of values of

c for different substances:

Once you have all that, this is the equation:

Q=m×c×ΔT(Q is usually used to symbolize that heat required in a case like this.)For water, the value of c is 4.186g°C So, Q=750×4.186×85=266=858=266.858

The focal length (f) of the magnifier needed to view the 2.60 mm long insect with an angular size of radians, , the required focal length for the magnifier is approximately 102.6 mm.

We can use the formula:

magnification = (image distance)/(object distance) = (1 + focal length)/(focal length)

where the magnification is given by the angular size of the image divided by the angular size of the object:

magnification = (angular size of image)/(angular size of object)

In this case, we want the angular size of the image to be 2.80×10−2 radians and the length of the object (the insect) is 2.60 mm. We can convert the length to meters (since the angular size is given in radians) by dividing by 1000:

object size = 2.60/1000 = 2.6×10−3 m

Now we can solve for the focal length:

magnification = (angular size of image)/(angular size of object) = (2.80×10−2)/(2.6×10−3) = 10.77

magnification = (1 + focal length)/(focal length)

10.77 = (1 + f)/(f)

10.77f = 1 + f

9.77f = 1

f = 0.1026 m = 102.6 mm

Therefore, the required focal length is 102.6 mm.

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Answer:

symbiosis

Explanation:

The ball's centripetal acceleration at 45 seconds is approximately 0.00741 m/s^2, and its velocity before it hits the ground is approximately 15.63 m/s. To find the speed of the ball at 45 seconds, we need to calculate its centripetal acceleration first.

To find the speed of the ball at 45 seconds, we need to calculate its centripetal acceleration first.

Given:

Mass of the ball, m = 30 grams = 0.03 kg

The radius of motion, r = 1.5 m

Time, t = 45 seconds

Centripetal acceleration (a) can be calculated using the formula:

a = v^2 / r

where v is the velocity of the ball.

To find the velocity, we can use the relation:

v = a * t

Substituting the values:

a = v^2 / r

a = (a * t)^2 / r

r * a = a^2 * t^2

a = (r * a / t^2)

Simplifying the equation, we find:

a = r / t^2

Now, let's calculate the centripetal acceleration at 45 seconds:

a = 1.5 m / (45 s)^2

a ≈ 0.00741 m/s^2

Next, to find the velocity before the ball hits the ground, we need to calculate the time it takes for the ball to travel the distance of 10m horizontally after breaking loose from the centripetal motion.

Given:

Distance traveled horizontally, d = 10 m

The vertical distance from the ground, h = 2 m

The time taken to travel the horizontal distance can be found using the horizontal component of the initial velocity:

d = v_horizontal * t_horizontal

Since the ball is in free fall, we can use the equation:

h = (1/2) * g * t^2

Solving for t, we get:

t = sqrt((2 * h) / g)

Substituting the given values:

t = sqrt((2 * 2 m) / (9.8 m/s^2))

t ≈ 0.64 s

Now, we can find the horizontal velocity (v_horizontal) using the equation:

v_horizontal = d / t_horizontal

Substituting the given values:

v_horizontal = 10 m / 0.64 s

v_horizontal ≈ 15.63 m/s

Therefore, the ball's centripetal acceleration at 45 seconds is approximately 0.00741 m/s^2, and its velocity before it hits the ground is approximately 15.63 m/s.

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Answer:

Left

Explanation:

The total energy of the body at evevry point is remained same due to the law of conservation of energy. Distance from A to B and final velocity of the ball just reach before C is 44.3 m/s.

d (distance) from A to B is = √2gh

In this case given are, g = 9.8 m/s² and h = 100m,

so here d = √(2⋅9.8⋅100) = 44.3m.

Final velocity ,v = √2gh

Here given are , v is the velocity, g is the acceleration due to gravity, and h is the height. In this case,

g = 9.8 m/s² ,h = 100m,

v = √(2⋅9.8⋅100)

= 44.3 m/s (final velocity)

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Answer: The answer is C.

Explanation:Just took the quiz

The statement about the relationship between rates of reaction and concentration of reactants true is reactions are slower when there is lower concentration of reactants.

The chemical reaction is the reaction between two reactants which led to the formation of products.

The products are substances which forms after reaction. The reactants are the substances which are original materials.

Oxygen is needed for the reactions that cause artifacts to decay in the ocean.

Some ancient shipwrecks have been well-preserved deep in the ocean.

Reviewing the information in the data table, we conclude that reactions are slower when there is lower concentration of reactants.

Thus, the correct option is C.

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(a) The speed of the ball at the lowest point is 1.97 m/s.

(b) The tension in the rod at the lowest point is 1.29 N since the ball is weightless at that instant.

(c) The angle at which the tension in the rod equals the weight of the ball is 81.4 degrees.

(d) The answer to (c) remains the same if the mass of the ball is increased.

(a) To find the speed of the ball at its lowest point, we can use the conservation of energy. At the highest point, the ball has potential energy equal to mgh, where m is the mass of the ball, g is the acceleration due to gravity (9.81 m/s²), and h is the height of the ball above its lowest point. At the lowest point, all of this potential energy is converted into kinetic energy, so we can set mgh = (1/2)mv², where v is the speed of the ball at its lowest point.

Solving for v, we get:

mgh = (1/2)mv²

v² = 2gh

v = √(2gh)

Plugging in the values, we get:

v = √(2 x 9.81 x 0.62) = 1.97 m/s

Therefore, the speed of the ball at its lowest point is 1.97 m/s.

(b) To find the tension in the rod at the lowest point, we can use Newton's second law. At the lowest point, the ball is moving in a circular path with a constant speed, so the net force on the ball is the centripetal force:

F_net = mv²/r

where r is the length of the rod. The only force acting on the ball at the lowest point is tension in the rod, so we can write:

T - mg = mv²/r

Solving for T, we get:

T = mv²/r + mg

Plugging in the values, we get:

T = (0.092 kg) x (1.97 m/s)² / 0.62 m + (0.092 kg) x (9.81 m/²) = 1.29 N

Therefore, the tension in the rod at the lowest point is 1.29 N.

(c) To find the angle at which the tension in the rod equals the weight of the ball, we can use trigonometry. Let θ be the angle between the rod and the vertical. At this angle, the tension in the rod is equal to the weight of the ball, so we can write:

T = mg sin(θ)

where m is the mass of the ball and g is the acceleration due to gravity.

Solving for θ, we get:

θ = \(sin^{(-1)\)T/mg)

Plugging in the values, we get:

θ = \(sin^{(-1)\)(1.29 N / (0.092 kg x 9.81 m/s²)) = 81.4 degrees

Therefore, the angle at which the tension in the rod equals the weight of the ball is 81.4 degrees.

(d) If the mass of the ball is increased, the answer to (c) will remain the same. This is because the tension in the rod and the weight of the ball both increase by the same factor, so their ratio remains the same.

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Answer: There are five principles of fitness out of which two are overload principle and rest and recovery principle. Overload principle is one of the most important principle which tell that to gain and improve the fitness one should do the hard work.  

Slowly and gradually the intensity and time of exercise are increased so that our body can adapt to the hard work. Overload principle plays an important role in improving the skills and improving performance during exercise and sports.

Rest and recovery principle is important to relax the body and release the stress that happens due to intense training like in case of weight lifting one day rest should be taken to repair and rebuild the muscles. This allows the body to encounter the fatigue and improve performance.

Explanation:

Answer:

i cannot see the the claim

Explanation:

A divergent plate boundary is a location on Earth's surface where two tectonic plates are moving away from each other. This movement causes the crust to crack and form a rift, which can lead to the formation of magma.

The process begins with the Earth's mantle, the layer of rock below the crust. The mantle is made up of solid rock that is heated by the Earth's core and is in a constant state of convection. As the rock in the mantle rises, it begins to melt and form magma. This magma is less dense than the surrounding rock, so it begins to rise towards the surface.

As the magma rises, it pushes against the crust, causing it to crack and form a rift. The rift is a deep crack in the Earth's surface, and as the tectonic plates continue to move apart, it becomes wider and wider. The magma continues to rise and fill the rift, forming a volcano.

As the divergent plate boundary continues to move apart, the volcano continues to erupt and build up layers of lava and ash. Over time, these layers can build up to form a volcano. This process can continue for millions of years, forming a chain of volcanoes along the divergent plate boundary.

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