a small, 300 g cart is moving at 1.10 m/s on a frictionless track when it collides with a larger, 2.00 kg cart at rest. after the collision, the small cart recoils at 0.850 m/s .
what is the speed of the large cart after bthe collision?

Answer:

Reindeer

Explanation:

High traction to walk on ice

Woolly fur to keep warm

Answer:

Reindeer have dense, woolly fur and hooves with high traction.

Explanation:

\( \huge\boxed{ \tt option \: a}\)

Yes. The paint can take in energy from the light, causing it to be damaged.

the answer is

A , Yes. The paint can take in energy from the light, causing it to be damaged

Answer:

The answer is D

Explanation:

A must always be taller than B  for the skateboarder to have just enough energy to complete the loop.

Centripetal acceleration is a characteristic of an object's motion along a circular path. Centripetal acceleration applies to any item travelling in a circle with an acceleration vector pointing in the direction of the circle's center.

To cancel out gravitational acceleration at point  B, the skateboarder should have centripetal acceleration, that is, he should have some amount of kinetic energy.

Hence, from conservation of energy, it may be written that:

Potential energy at point A = (potential energy + kinetic energy) at point B

mgh₁ = mgh₂ + mv²/2

Hence, h₁ > h₂

That is, Height of A > height of B

Hence,  A must always be taller than B  for the skateboarder to have just enough energy to complete the loop.

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Based on the provided options, the article is mainly about D. Lindsey Vonn competing in four Olympic Games. The correct option is D.

A. The teen athletes who went to the Youth Olympic Games: This option is not true because there is no mention of teen athletes or the Youth Olympic Games in the given information. The article focuses on Lindsey Vonn and her participation in the Olympic Games, not specifically on the Youth Olympic Games or other teen athletes.

B. Lindsey Vonn speaking at the Youth Olympic Games: This option is not true because there is no mention of Lindsey Vonn speaking at the Youth Olympic Games in the provided information. The article is about her competing in the Olympic Games, not speaking at the Youth Olympic Games.

C. The ideas that are important in the Olympic Games: This option is not true because there is no indication that the article discusses the ideas that are important in the Olympic Games. The focus is on Lindsey Vonn's participation and achievements in the Olympic Games, rather than discussing the broader ideas and concepts associated with the Games.

Therefore, based on the given options and the information provided, option D. Lindsey Vonn competing in four Olympic Games is the most accurate description of the article's main topic.

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When lee pushes horizontally with a force of 87 n on a 20 kg mass for 13 m across a floor the amount of work lee did is 1,131 J.

Work is defined as the product of force and displacement in the direction of the force. In this case, Lee pushes horizontally with a force of 87 N on a 20 kg mass for a distance of 13 m across a floor.

To calculate the amount of work, we can use the formula:

Work = Force × Displacement × cos(θ)

where θ is the angle between the force vector and the displacement vector. In this case, the force and displacement are in the same direction, so cos(θ) is equal to 1.

Substituting the given values into the formula, we have:

Work = 87 N × 13 m × cos(0°)

Since cos(0°) is equal to 1, the equation simplifies to:

Work = 87 N × 13 m

Calculating the value, we find:

Work = 1,131 J

Therefore, Lee did 1,131 J of work.

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The number of vibrations are 122

as per the question given,

the length of the mass less string (l) is 31cm

a mass attached to the right end of spring (m) is 1kg

the value of the spring constant is (k) is 164 n/m

the mass is pulled by a distance (d) is 3cm

time (t) is 60s

the time period of the mass-less spring  system is

\(T=2\pi \sqrt{\frac{m}{k} }\)             ----(1)

where

the value of (m) is 1kg

the value of spring constant (k) is 164 n/m

let the value of \(\pi\) is 3.14

now substitute the values in the time period equation

\(T=2\pi \sqrt{\frac{1}{164} }\)

=> \(T= 2\times (3.14) \sqrt{\frac{1}{164} }\)

=> T = \(2\times (3.14) \times 0.07803\)

=> T =0.49002

the time period T is 0.49002,

therefore the number of oscillations in 60s is

n = time/Time period

\(n=\frac{60}{T}\)

=>n =  \(\frac{60}{0.49002}\)

=> n= 122.43

=> n = 122

the number of vibrations are 122    

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If the predator in the Lotka-Volterra models feeds on several different prey items, the outcomes would likely be different compared to a scenario where it feeds on a single prey item.

In the Lotka-Volterra models, the interaction between predators and prey is typically represented by a set of differential equations. When a predator feeds on several different prey items, it introduces additional complexities to the model. Here are a few reasons why the outcomes would likely be different:

Prey Interactions: Different prey items may have different population dynamics and interactions with each other. Some prey may compete for resources, while others may have a mutually beneficial relationship. These interactions can affect the predator's ability to obtain food and impact the population dynamics of both the predator and prey species.

Predator Behavior: A predator feeding on multiple prey items may exhibit different foraging behaviors. It could switch between prey types based on availability or preference. This dynamic foraging behavior can influence the predation pressure on each prey species and lead to different population dynamics.

Resource Partitioning: When a predator consumes multiple prey items, there may be resource partitioning among the prey species. Each prey species may have different resource requirements, leading to variations in their population sizes and dynamics. This partitioning can create niche differentiation and affect the overall stability and dynamics of the predator-prey system.

Trophic Cascades: The presence of multiple prey items can introduce the possibility of trophic cascades, where changes in one prey population can indirectly affect the other prey species and subsequently impact the predator. For example, if the predator's primary prey becomes scarce, it may switch to another prey item, which could lead to population fluctuations and indirect effects throughout the ecosystem.

In summary, when the predator in the Lotka-Volterra models feeds on multiple prey items, the outcomes can be different due to complex prey interactions, predator behavior, resource partitioning, and the potential for trophic cascades. These additional factors introduce more variables and dynamics into the model, leading to different population sizes and interactions between the predator and prey species.

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Answer:

The answer is Human beings

Answer:

Respiration

Explanation:

because the role of the respiratory system is to inhale oxygen and exhale carbon dioxide were by the cells of the body use oxygen to perform certain functions that keeps us alive and the waste products created by our body cells after they've performed these functions is regarded as carbon dioxide.

Answer:

-4500 N

Source: Brainly

The police officer must be angry 0_0

Answer:

By encouraging them.

Explanation:

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Answer:

His ability to soar to the basket and do things we'd never before seen captured the world's attention and helped make basketball more of a global sport than it had ever been.  His reverse layups, slam dunks, and fadeaway shots were exciting to say the least.

Explanation:

Answer:

False

Explanation:

It is located in the little dipper whose stars are more faint.

Answer: Which of the following is NOT required to maintain healthy soil?

Maintaining soil water levels

Maintaining aeration

Maintaining organic matter content

Maintaining diverse microbial communities

ANSWER: A

To maintain healthy soil we need not to maintaining soil water levels.

When a soil performs its range of ecological tasks in an adequate manner for its surroundings, it is said to be in good health. In more everyday language, the health of soil results from the harmonious interactions of all soil constituents, such as bacteria, plants, and animals. Aggregates in healthy soil help it stick together and resist runoff and erosion. Plants survive better in droughts because it can hold more water. It has more bacteria and fungi, which aid plants in warding against pests and disease.

To maintain healthy soil we need not to maintaining soil water levels.

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Answer:

friction

air drag

every thing that opposes the motion affects kinetic energy

Explanation:

kinetic energy is a energy which is increase with increase in motion and potential energy is energy stored while the object is at rest

potential energy ∝ 1/(kinetic energy)

as kinetic energy increases potential energy decreases

Answer:

The answer is 9.4 m/s

Explanation:

Because you add 5.0 + 4.5= 9.4

If you look at courage and if you look at the brain, there is one particular brain structure that plays a very important role when it comes to courage and your own performance. This part of the brain is called the amygdala. The amygdala is a brain structure that is very small, and we have two of them, one of the left side of the brain, one on the right side of the brain. They’re very small and look like an almond. Amygdala is also the Latin word for almond. Even though they are small, they amygdala is also extremely powerful. It plays a very important role in our survival. Whenever there is a real danger outside, it will trigger a fight, flight or freeze response, so you will fight danger, run away, or just be blocked in your own emotions, you will freeze, perhaps you will hide. The amygdala is very important for our survival and for many emotions in general, but in many situations, the amygdala will also become active when there is no real danger, for example, standing on stage and holding a presentation, leading a difficult conversation. These are two examples where there’s no real danger, but nevertheless, the amygdala can be triggered and cause this feeling of nervousness and anxiety. It’s these feelings of nervousness, anxiety or insecurity that will also block us in our potential to hold a presentation or to lead a good conversation.

Answer:

60 days.

Explanation:

Let the original mass (N₀) = 1 g

Amount remaining (N) = 6.25% of its original mass

= 6.25% × 1

= 6.25/100 × 1

= 0.0625 g

Half life (t½) = 15 days

Time (t) =?

Next, we shall determine the rate of decay. This can be obtained as follow:

Decay constant (K) = 0.693/ half life

K = 0.693 / t½

Half life (t½) = 15 days

Decay constant (K) =?

K = 0.693 / t½

K = 0.693 / 15

K = 0.0462 / day

Finally, we shall determine the time taken for the sample of the isotope to decay to 6.25% of its original mass.

This can be obtained as follow:

Original amount (N₀) = 1 g

Amount remaining (N) = 0.0625 g

Decay constant (K) = 0.0462 / day

Time (t) =?

Log (N₀/N) = Kt/2.3

Log (1/0.0625) = 0.0462 × t / 2.3

Log 16 = 0.0462 × t / 2.3

1.2041 = 0.0462 × t /2.3

Cross multiply

0.0462 × t = 1.2041 × 2.3

Divide both side by 0.0462

t = (1.2041 × 2.3)/0.0462

t = 59.9 ≈ 60 days

Therefore, the time taken for the sample of the isotope to decay to 6.25% of its original mass is 60 days

It is unlikely that a tortoise that lived to 100 and had 10 surviving offspring had equal fitness as a tortoise that lived to 30 and had 10 surviving offspring considering only this generation.

The concept of fitness in evolutionary biology refers to an organism's ability to survive and produce offspring in its environment. Fitness is measured by an individual's reproductive success relative to others in the same population. In this case, both tortoises had the same number of surviving offspring (10), which suggests that they had the same reproductive success.

Therefore, it is unlikely that they had equal fitness, despite the difference in lifespan. However, it's worth noting that this is a simplified example, and in reality, there are many factors that can affect an organism's fitness, including its ability to survive and reproduce over multiple generations.

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The final distance traveled by the elevator is 60m and moved 36m (option B).

To calculate the total distance traveled by the elevator, we must take into account that each floor is equivalent to a distance of 3 meters.

So we need to multiply the number of floors he travels on each trip and multiply it by 3 to find the distance he traveled.

3m × 7 = 21m

3m × 4 = 12m

3m × 9 = 27m

To know the total distance traveled by the elevator, we must add the meters traveled in each displacement:

21m + 12m + 27m = 60m

On the other hand, to know the displacement that the elevator made from its initial position to its final position, we multiply 3 by the number of floors that there is a difference between its initial position and its final position.

3m × 12 = 36m

According to the above, it can be inferred that the correct answer is B. Because the elevator traveled a total of 60m and moved 36m.

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The electric flux through a 38.0-cm-diameter spherical surface concentric with a charge distribution can be calculated using Gauss's law, which relates the electric flux to the enclosed charge.

The formula for electric flux is:

Φ = E•A•cos(θ)

Where Φ is the electric flux, E is the electric field, A is the area of the surface, and θ is the angle between the electric field and the normal to the surface.

Suppose the surface is a sphere of radius r, and the charge distribution is spherically symmetric. In that case, the electric field is also spherically symmetric and has the same magnitude at all points on the sphere. Therefore, we can simplify the calculation by using the formula:

Φ = E•4πr^2

where r is the sphere's radius and E is the electric field strength. According to Gauss's law, the electric flux through any closed surface is equal to the net charge enclosed by the surface divided by the permittivity of free space, ε0.

Φ = Qenc/ε0, where Qenc is the net charge enclosed by the surface and ε0 is the permittivity of free space, which is a constant equal to 8.85 x 10^-12 C^2/Nm^2.

Qenc = Q

Where Q is the total charge of the distribution.

Now we can combine these formulas to find the electric flux through the spherical surface:

Φ = E•4πr^2 = Q/ε0

We are given that the surface has a diameter of 38.0 cm, which means the radius is r = 19.0 cm = 0.19 m. We are not given the value of the electric field or the total charge, so we cannot calculate the electric flux directly.

However, we can use this equation to calculate the electric field if we know the total charge:

E = Q/(4πε0r^2)

Once we have the electric field, we can substitute it into the first equation to find the electric flux:

Φ = E•4πr^2

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Answer:

Energy, in physics, the capacity for doing work. It may exist in potential, kinetic, thermal, electrical, chemical, nuclear, or other various forms

Nuclear Power Nuclear power is a clean and efficient way of boiling water to make steam, which turns turbines to produce electricity. Nuclear power plants use low-enriched uranium fuel to produce electricity through a process called fission

Gravity, also called gravitation, in mechanics, the universal force of attraction acting between all matter. On Earth all bodies have a weight, or downward force of gravity, proportional to their mass, which Earth's mass exerts on them. Gravity is measured by the acceleration that it gives to freely falling objects

Electricity is the flow of electrical power or charge. It is a secondary energy source which means that we get it from the conversion of other sources of energy,

Mechanical Energy is the sum of potential energy and kinetic energy. It is the macroscopic energy associated with a system. The principle of conservation of mechanical energy states that in an isolated system that is only subject to conservative forces

Sound is a vibration that propagates as an acoustic wave, through a transmission medium such as a gas, liquid or solid

Light commonly refers to electromagnetic radiation that can be detected by the human eye.

Motion in physics, change with time of the position or orientation of a body. Motion along a line or a curve is called translation

Electromagnetic radiation in classical physics, the flow of energy at the universal speed of light through free space or through a material medium in the form of the electric and magnetic fields that make up electromagnetic waves such as radio waves, visible light, and gamma rays

Heat is the form of energy that is transferred between systems or objects with different temperatures

Answer:

Tropical region

Explanation:

because the regions near the equator are called tropical regions

(a) The kinetic energy of the cart when it moves is 2/3 the way down is 1/3mgh.

(b) The total mechanical energy of the cart at the given height of 5 m is 5mg.

The potential energy of the cart when it is 2/3 way down the given height of 5 m is calculated as follows;

ΔP.E = mghf - mgh₀

ΔP.E = mg(hf - h₀)

ΔP.E = mg(2h/3 - h)

ΔP.E = -¹/₃mgh

ΔK.E = -ΔP.E

ΔK.E = ¹/₃mgh

M.A = P.E + K.E

M.A = ²/₃mgh + ¹/₃mgh

M.A = mgh

M.A = mg(5)

M.A = 5mg

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According to Huygens' principle, every point on a wave front acts as a source of a new spherical wave. Therefore, the correct answer is (B) spherical.

This principle was proposed by Dutch physicist Christiaan Huygens in the late 17th century and it describes the propagation of waves. According to this principle, each point on a wavefront is considered to be the source of secondary wavelets that spread out in all directions. The sum of these wavelets gives the new wavefront at a later point in time.

This principle of Huygens is used to study the phenomenon of diffraction and refraction. According to Huygens' principle, any point on a wave front can be thought of as a source of secondary waves. The superposition of two waves is referred to as interference, whereas interference caused by several waves is referred to as diffraction.

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1) The number of photons in each beam is what determines the amount of energy each beam carries. A beam of red light contains more photons than a beam of blue light, but each photon in the blue beam carries more energy than each photon in the red beam. Therefore, the two beams can carry the same amount of energy despite having different energies per photon.

2) Reflecting telescopes have two advantages over refractors. They are cheaper to manufacture, and they do not suffer from chromatic aberration.

3) Refraction is the bending of light as it passes from one medium to another. Refraction occurs because light waves travel at different speeds through different materials. The amount of refraction depends on the angle at which the light passes through the medium.

4) The image of a star is larger in the focal plane of the larger telescope. This is because the larger telescope collects more light than the smaller telescope, which means that the image is brighter and has a higher signal-to-noise ratio.

5) Quantum efficiency is a measure of how efficiently a detector converts incoming photons into electrical signals. A higher quantum efficiency means that more of the incoming

photons are detected, which makes it easier to detect faint astronomical objects.

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1) The number of photons in each beam is what determines the amount of energy each beam carries.

2) Reflecting telescopes have two advantages over refractors.

3) Refraction is the bending of light as it passes from one medium to another.

4) The image of a star is larger in the focal plane of the larger telescope.

5) Quantum efficiency is a measure of how efficiently a detector converts incoming photons into electrical signals.

1) The number of photons in each beam is what determines the amount of energy each beam carries. A beam of red light contains more photons than a beam of blue light, but each photon in the blue beam carries more energy than each photon in the red beam. Therefore, the two beams can carry the same amount of energy despite having different energies per photon.

2) Reflecting telescopes have two advantages over refractors. They are cheaper to manufacture, and they do not suffer from chromatic aberration.

3) Refraction is the bending of light as it passes from one medium to another. Refraction occurs because light waves travel at different speeds through different materials. The amount of refraction depends on the angle at which the light passes through the medium.

4) The image of a star is larger in the focal plane of the larger telescope. This is because the larger telescope collects more light than the smaller telescope, which means that the image is brighter and has a higher signal-to-noise ratio.

5) Quantum efficiency is a measure of how efficiently a detector converts incoming photons into electrical signals. A higher quantum efficiency means that more of the incoming

photons are detected, which makes it easier to detect faint astronomical objects.

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Answer:

Nuclear energy

Explanation:

The nucleus holds the energy together

Answer:

First, the thermometer is dipped into boiling water, and the mercury inside the thermometer rises to a high level, called the boiling point. This level is then marked as 100°C. The thermometer is then dipped into melting ice, which causes the mercury level to fall to a point called the ice point. This point is then marked as 0°C. The length of the thermometer from the 0°C mark to the 100°C point is then divided into 100 equal sections, and the rest of the levels are marked accordingly.

Hi there!

The equation for the kinetic friction force is:

\(F_{kf} = \mu mg\)

We can begin by doing a summation of forces acting on the couch where a positive force is in the direction of the couch's acceleration, or in the direction of the push.

Thus:

\(\Sigma F = F_A - F_{kf}\)

Now, plug in the values:

\(F_{net}= 650 - (.81 * 9.8 * 71) = \boxed{86.4 N}\)

Specific elements can be identified in a particular spectra through a process called spectral analysis.

Each element has a unique set of energy levels, which correspond to the specific wavelengths of light they can absorb or emit. When an element is excited, such as by heating or applying an electric current, it releases energy in the form of light, this emitted light creates a spectrum, which is a pattern of wavelengths specific to that element. Spectroscopy is the technique used to study these spectra. When light from an excited element is passed through a spectrometer, the light is separated into its constituent wavelengths, creating a characteristic pattern called an emission spectrum.

Conversely, when light is passed through a cool gas of the element, certain wavelengths are absorbed, resulting in an absorption spectrum. By comparing these spectra to known patterns of elements, scientists can accurately identify the elements present in the sample. In summary, specific elements can be identified in a particular spectrum by analyzing their unique patterns of emitted or absorbed light wavelengths through spectroscopy. By comparing these patterns to known emission or absorption spectra of various elements, one can determine the composition of the sample being analyzed, this technique has numerous applications, including the study of chemical reactions, analysis of environmental samples, and even determining the elemental composition of stars and distant celestial objects.

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Basically your liquid will go over the line because you are adding more mass. the balloon will inflate because  of mass filling it.  Part 1  I noticed that there was a change from the original line.   part 2  Some mass is lost. The bubbles are the gas leaving. The balloon increases in size because of the mass. The cup got heavier when I added the vinegar.

Gas leaving caused the bubbles.