a distant star explodes, releasing a burst of energy. which of the following best predicts how waves carrying energy from the explosion will be perceived on earth?
A) infra_red B) light. C) radio. D)sound​

The given statement isTrue. If enough changes occur in the gene pool of a species over time, it is possible for a new species to emerge.

This process is known as speciation. Speciation can occur through various mechanisms, including genetic mutations, genetic drift, natural selection, and geographic isolation.

Accumulated genetic changes can lead to reproductive isolation between populations, preventing interbreeding and facilitating the formation of distinct species.

The exact mechanisms and timeline of speciation can vary depending on the specific circumstances and evolutionary pressures acting on the populations involved.

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Answer:

) At the top v =0 and there will be a acceleration due to gravity (g) acting downward.

Answer:

1 =The kinetic theory of gases is a simple, historically significant model of the thermodynamic behavior of gases, with which many principal concepts of thermodynamics were established. The model describes a gas as a large number of identical submicroscopic particles, all of which are in constant, rapid, random motion.

2 =When this bimetallic strip is heated, the brass expands more than the steel and the strip curves with the brass on the outside. If the strip is cooled, it curves with the steel on the outside.

3 =Bimetal strips are also used in time-delay relays, gas oven safety valves, thermal flashers for older turn signal lamps, and fluorescent lamp starters.

The minimum velocity with which he must kick the ball is 22.22 m/s.

The time taken for the ball to travel 11 m height is calculated as follows;

h = V_yt + ¹/₂gt²

where;

h = ¹/₂gt²

t = √(2h/g)

the height traveled by the ball = 10m, since Joe is already 1 m above the ground.

t = √(2 x 10/9.8)

t = 1.43 seconds

The minimum velocity of the ball is calculated as follows;

R = Vₓt

Vₓ = R/t

Vcosθ = R/t

V = R/(tcosθ )

V = (20)/(1.43 x cos51)

V = 22.22 m/s

Thus, the minimum velocity with which he must kick the ball is 22.22 m/s.

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\(\\ \tt\hookrightarrow Mechanical\:advantage\)

\(\\ \tt\hookrightarrow \dfrac{Output}{Input}\)

\(\\ \tt\hookrightarrow \dfrac{125}{50}\)

\(\\ \tt\hookrightarrow 2.5\)

Answer:

See the explanation below.

Explanation:

We know from Newton's second law that the sum of forces on a body is equal to the product of mass by acceleration. In this way, we have the following equation.

∑F = m*a

where:

∑F = sum of the forces [N] (units of Newtons)

m = mass of the car [kg]

a = acceleration [m/s²]

Therefore we have two forces one that drives the car forward and another that opposes the movement.

\(500-500 = m*a\\m*a=0\\a=0\)

This tells us that the acceleration is zero and therefore the movement is with constant speed. That is, the speed does not vary during the movement of the vehicle.

Answer:That only applies to highly polished surfaces, eg mirrors.

If you take a high quality laser (ie with low divergence) and aim it at a wall, you can see the spot where the laser beam reaches the wall from anywhere with a direct line-of-sight to the spot where the laser beam reaches the wall. This due to micro imperfections on the surface of the wall. At a microscopic level, the wall surface is very rough and pointing in all directions.

As to why, a beam of light bounces of a highly polished surface, I can only surmise that it is essentially due to kinematics, ie the only force opposing the light beam is normal to the surface, hence there no forces along the reflective surface. Since there are no forces along the reflective surface, the speed component of light along the reflective surface remains unchanged. However, on the plane perpendicular to the reflective surface the, the light photons bounce off at the same speed at which the hit the reflective surface because the mass of the reflective surface is much much much larger than the mass of the photons, which means that the reflective surface won’t move at all. Since conservation of momentum requires that momentum after the collision be the same as the momentum before the collision then the only way for that to happen is if the velocity of the photon perpendicular to the reflective surface is of exactly the same magnitude but in the opposite direction. Vector resolution of the speed component of the reflected beam means that the angle of reflection must be the same as the angle of incidence.

Explanation:

The speed of the cylinder at the bottom of the inclined plane is approximately 1.44 m/s.

To determine the speed of the cylinder at the bottom of the incline, we can use the conservation of energy principle, which states that the total mechanical energy of the system is conserved.

At the top of the incline, the cylinder has only potential energy, which is given by:

PE = mgh

where m is the mass of the cylinder, g is the acceleration due to gravity, and h is the height of the incline.

At the bottom of the incline, the cylinder has both kinetic energy due to its translational motion and rotational energy due to its spinning motion. The total kinetic energy is given by:

KE = (1/2)mv^2 + (1/2)Iw^2

where v is the linear speed of the cylinder, I is its moment of inertia, and w is its angular speed.

Since the cylinder rolls without slipping, we can relate v and w using the equation:

v = rw

where r is the radius of the cylinder.

The moment of inertia of a solid cylinder is given by:

I = (1/2)mr^2

Substituting these expressions for KE and I into the conservation of energy equation, we obtain:

mgh = (1/2)mv^2 + (1/2)(1/2)mr^2w^2

Simplifying and substituting v = rw, we get:

v = √(2gh/3)

Plugging in the given values, we get:

v = √(2 × 9.81 m/s^2 × 0.55 m/3)

≈ 1.44 m/s

Therefore, the speed of the cylinder at the bottom of the inclined plane is approximately 1.44 m/s.

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To calculate the speed of the disk in conceptual example 10-17 at the bottom of the inclined plane, we need to use the conservation of energy principle. The potential energy at the top of the incline is converted into kinetic energy at the bottom.

First, we need to calculate the potential energy at the top of the incline. The potential energy can be calculated using the formula:

PE = mgh

Where m is the mass of the disk, g is the acceleration due to gravity (9.81 m/s^2), and h is the height of the incline (0.55 m).

PE = (0.5 kg) x (9.81 m/s^2) x (0.55 m) = 2.7 J

This potential energy is converted into kinetic energy at the bottom of the incline, which can be calculated using the formula:

KE = 0.5mv^2

Where v is the speed of the disk at the bottom.

Since energy is conserved, we can set PE equal to KE:

PE = KE

2.7 J = 0.5(0.5 kg)v^2

Solving for v, we get:

v = sqrt(2.7 J / 0.25 kg)

v = 3.3 m/s

Therefore, the speed of the disk in conceptual example 10-17 at the bottom of the inclined plane is 3.3 m/s.
In the conceptual example 10-17, a disk rolls down an inclined plane. To calculate the speed of the disk at the bottom of the inclined plane with a height of 0.55 meters, we can use the conservation of mechanical energy principle. This principle states that the total mechanical energy (potential energy + kinetic energy) of the disk remains constant if no external forces are acting on it.

At the top of the incline, the disk has only potential energy (PE) due to its height, and no kinetic energy (KE) since it is not moving. As it rolls down, the potential energy is converted into kinetic energy (both translational and rotational).

The potential energy at the top is given by PE = m * g * h, where m is the mass of the disk, g is the acceleration due to gravity (approximately 9.81 m/s^2), and h is the height of the incline (0.55 m).

At the bottom of the incline, the disk has no potential energy, and its kinetic energy is a combination of translational (KE_t) and rotational (KE_r) components. The total kinetic energy is given by KE = (1/2) * m * v^2 + (1/2) * I * ω^2, where v is the linear velocity, I is the moment of inertia of the disk, and ω is the angular velocity.

Since the total mechanical energy is conserved, we can set the potential energy at the top equal to the kinetic energy at the bottom:

m * g * h = (1/2) * m * v^2 + (1/2) * I * ω^2

To solve for the linear velocity (v) at the bottom of the incline, we also need to know the mass of the disk, the moment of inertia, and the angular velocity. These values are not provided in your question. However, once you have this information, you can use the conservation of mechanical energy equation to find the speed of the disk at the bottom of the inclined plane.

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Displacement of diver , d = 6000-1260 = 4740 m.

Let, time taken be t .

By equation of motion :

\(v^2-u^2=2gs\\\\v=\sqrt{2gs}\\\\v=\sqrt{2\times 9.8\times 4740}\ m/s\\\\v=304.8\ m/s\)

Now , by equation :

v = u +gt

304.8 = 0 + 9.8t

t = 31.1 seconds

Hence, this is the required solution.

The angular resolution of the 100 m Green Bank Telescope when it operates at a wavelength of 20 cm is approximately 1.6 arcseconds.

1. Calculate the telescope's diameter in meters:

100 m

2. Calculate the wavelength in meters:

20 cm = 0.2 m

3. Calculate the resolving power of the telescope:

Resolving power = D / λ

Resolving power = 100 m / 0.2 m

Resolving power = 500

4. Calculate the angular resolution:

Angular resolution = 1 / Resolving power

Angular resolution = 1 / 500

Angular resolution = 0.002 radians

5. Convert the angular resolution to arcseconds:

Angular resolution = 0.002 radians * (180/π) * (3600/1)

6. Calculate the telescope's diameter in meters:

100 m

7. Calculate the wavelength in meters:

20 cm = 0.2 m

8. Calculate the resolving power of the telescope:

Resolving power = D / λ

Resolving power = 100 m / 0.2 m

Resolving power = 500

9. Calculate the angular resolution:

Angular resolution = 1 / Resolving power

Angular resolution = 1 / 500

Angular resolution = 0.002 radians

10. Convert the angular resolution to arcseconds:

Angular resolution = 0.002 radians * (180/π) * (3600/1)

Angular resolution = 1.6 arcseconds

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The rocks of the Appalachian Blue Ridge are dominated by metamorphic rocks, specifically the type known as gneiss. Gneiss is a type of metamorphic rock that is formed when preexisting rocks, such as granite, shale, or volcanic rock, are subjected to high temperatures and pressures over a long period of time.

The resulting gneiss has a banded texture, with alternating light and dark layers that reflect the different minerals that were present in the original rock. Gneiss is a common rock type in the Appalachian Mountains, which was formed by the collision of tectonic plates over 300 million years ago. The Blue Ridge region, in particular, is characterized by a series of ridges and valleys that are sculpted from the resistant gneiss formations.

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The work done by the driver pushing a stationary truck is zero, but the driver still expends energy to overcome the static friction between the truck and the ground.

The work done by the driver pushing a stationary truck with a constant force is zero. This is because work is defined as the product of force and displacement in the direction of force. In this case, the force applied by the driver is in the direction of motion, but since the truck doesn't move, the displacement is zero. Therefore, the work done by the driver is also zero.

However, it's worth noting that even though no work is done on the truck, the driver still expends energy. The energy expended by the driver goes into overcoming the static friction between the truck's wheels and the ground.

Static friction is the force that prevents the truck from moving, and it requires a certain amount of energy to overcome it. This energy is dissipated as heat and sound as the driver pushes against the truck.

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For every 5.00 m the box moves along the ramp, the pushing force does 583 J of work.

To solve this problem, we need to use the formula for work done, which is given by W = Fd, where W is the work done, F is the force applied, and d is the distance covered.
In this case, the force applied is constant and has a magnitude of 100 N. The distance covered along the ramp for each 5.00 m is given by the hypotenuse of a right-angled triangle, with one side being 5.00 m and the other side being 3.00 m (the height gained by the box). Using Pythagoras theorem, we can find that the distance covered is 5.83 m.
Therefore, the work done by the pushing force for each 5.00 m the box moves along the ramp is given by W = 100 N x 5.83 m = 583 J (Joules). This means that for every 5.00 m the box moves along the ramp, the pushing force does 583 J of work.
It is important to note that the work done by the pushing force is equal to the increase in potential energy of the box as it gains height along the ramp. This is because work done is the product of force and distance, and in this case, the force is perpendicular to the displacement of the box, so no work is done in the horizontal direction. Therefore, all the work done goes towards increasing the potential energy of the box.

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The guitar string undergoes 30,720 oscillations each minute, which is not among the given options. However, it is closest to option B) 30,700.

We're given that the frequency of the guitar string's vibration is 512 Hz, which means it undergoes 512 oscillations per second. We need to find out how many oscillations it undergoes each minute.
Step 1: Convert the frequency from oscillations per second (Hz) to oscillations per minute.
To do this, we'll multiply the frequency (in Hz) by the number of seconds in a minute.

Step 2: Calculate the number of oscillations per minute.
Frequency (Hz) = 512 oscillations/second
Number of seconds in a minute = 60 seconds
Oscillations per minute = (Frequency in Hz) * (Number of seconds in a minute)
Oscillations per minute = (512 oscillations/second) * (60 seconds)

Step 3: Calculate the result.
Oscillations per minute = 30720 oscillations
It is important to note that the actual answer is 30,720, but if you must choose from the given options, B) 30,700 is the closest approximation.

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The ball to reach the ground first is the one filled with lead pellets.

When a pair of tennis balls fall through the air from a tall building, one regular and the other filled with lead pellets, both balls experience the force of gravity pulling them towards the ground. However, the ball filled with lead pellets has a greater mass due to the added weight of the lead. This results in a larger gravitational force acting on it.

Air resistance is also a factor when objects fall through the air. The regular tennis ball and the one filled with lead pellets have similar shapes and sizes, so they experience similar air resistance. However, due to the greater gravitational force acting on the ball filled with lead pellets, it can more easily overcome air resistance and accelerate towards the ground faster than the regular tennis ball. Thus, the ball filled with lead pellets reaches the ground first.

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The telescope with lens diameter 40 inch is 4 times better than a telescope with lens diameter 10 inches.

A telescope with angular resolution of  is R=4.56/D arcseconds

The diameter of first lens =D1=10 inch

The diameter of first lens =D2=40 inch

Ans 1) angular resolution of first lens=R1=4.56÷10=0.456 arcseconds

The Angular resolution of second lens=R2=4.56÷40=0.114 arcseconds

Ans 2) telescope  with lens of diameter=40 inch has higher angular resolution ,i.e., it helps us to see two points images of two objects placed close to each other .

Ans 3) resolving power of a telescope is inversely proportional to the angular resolution,i.e.,

Resolving power=RP=1/R;. Here R= angular resolution

Thus, RP1=1÷R2

And  RP2=1÷R2

thus RP1/RP2=R2/R1

RP1/RP2=0.114/0.456=1/4

Therfore RP2=4 RP1

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Answer:

It’s fun

Explanation:

If a person sitting on the outer edge of a merry-go-round travels at a greater speed than a person sitting near the center because the linear velocity is a product of the angular velocity and the perpendicular distance from the center .

It is defined as motion when the object is moving in a circle with a constant speed and its velocity is changing with every moment because of the change of direction but the speed of the object is constant in a uniform circular motion .

Because the linear velocity is a function of the angular velocity and the perpendicular distance from the center .

Thus, the person seated on the outside edge of a merry-go-round will move more quickly than a person seated near the center .

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100 Newtons (to the left)

Answer:

what this please be clear

Answer:

B. 190g

Explanation:

400/2.1 = 190

The investigation presented did offer proof in favor of the existence of imperceptible electric force fields.

The force between two charged objects is the electric force, sometimes referred to as the Coulomb force. The interaction of charged particles produces this fundamental force of nature. The magnitudes of the charges on the two objects and the separation between them define the strength of the electric force.

The tape was observed to interact without touching when it was charged by rubbing the tape against one another. The formation of an electric field surrounding the charged tape, which pulls on other nearby charged items, can be used to explain this interaction.

Even though the electric field surrounding the charged tape was not explicitly measured or quantified, the observed interaction between the tape offers a weak indirection for its presence. Hence, the investigation did offer sufficient proof to back up the existence of undetectable electric force fields.

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Answer:

the answer is A, 9.5 units

Answer:

One immediate division you might have seen on the periodic table is that the elements and their corresponding boxes are organized into vertical (up and down) columns and horizontal (left to right) rows. This link shows a periodic table with the columns (groups) and rows (periods) labeled. You should open that link up and keep it with you to compare with the explanations and examples in this section. In chemistry, we call the vertical organization either columns or groups. Whereas, the horizontal organization is called rows or periods. The columns or groups are usually labeled at the top of the periodic table by numbers; 1 through 18. On they periodic table that you have open one example of a group is group 17. It contains the elements fluorine, chlorine, bromine, iodine, and so on. The periods on most periodic tables are label on the left side of the periodic table by number 1 through 7. On the periodic table you have open one example of is period 4. It contains the elements potassium, calcium, scandium, titanium, and so on. In general, knowing the groups is a lot more important than knowing the periods. A lot of common properties between elements are shared if they are in the same group. For example, fluorine and chlorine are both in the same group and are both gases at a normal room temperature.

Explanation:

Plate tectonics, the rock cycle, and surface processes interact to create, concentrate, and distribute mineral resources. Understanding these processes is crucial for identifying and extracting valuable minerals for human use.

Plate tectonics, the rock cycle, and surface processes such as weathering and erosion play important roles in the availability of mineral resources for human extraction and use. Here's how these processes contribute:

Plate Tectonics: Plate tectonics is the theory that explains the movement of Earth's lithospheric plates. It influences the distribution of mineral resources through several mechanisms:

a. Subduction Zones: When one tectonic plate is subducted beneath another, it creates intense heat and pressure, causing rocks to melt and form magma chambers. This process can generate large deposits of minerals, including precious metals, such as gold and silver, as well as base metals like copper and lead.

b. Divergent Boundaries: At divergent plate boundaries, such as mid-oceanic ridges, magma rises to the surface, cools, and solidifies, forming new crust. These areas often contain valuable mineral resources, including iron, manganese, and hydrothermal vents that can host valuable metal deposits.

c. Transform Boundaries: Transform plate boundaries, where plates slide past each other, can create fault zones. These fault zones can act as conduits for hydrothermal fluids, which can deposit minerals like copper, zinc, and lead.

Rock Cycle: The rock cycle is a continuous process that describes how rocks are formed, weathered, and transformed over time. It contributes to the availability of mineral resources in the following ways:

a. Igneous Processes: Igneous rocks, formed from the solidification of magma or lava, can host valuable mineral deposits. For example, granite and pegmatite rocks can contain minerals such as quartz, feldspar, and mica, while basaltic rocks can contain minerals like iron and magnesium.

b. Metamorphic Processes: Heat and pressure during the metamorphic process can cause minerals to recrystallize and concentrate, leading to the formation of economically significant mineral deposits. Examples include metamorphic deposits of asbestos, talc, and graphite.

c. Sedimentary Processes: Sedimentary rocks are formed from the accumulation of sediments, which may contain mineral grains eroded from existing rocks. Sedimentary deposits are important for resources like coal, oil, natural gas, and mineral sands (e.g., titanium, zircon).

Surface Processes (Weathering and Erosion): Surface processes, including weathering and erosion, can influence the availability and concentration of mineral resources:

a. Weathering: Weathering breaks down rocks into smaller particles, releasing minerals from their original host rocks. Through chemical weathering, certain minerals can be concentrated or leached, leading to the formation of economically viable deposits. For instance, weathering of sulfide minerals can generate ore bodies containing valuable metals like copper, zinc, and nickel.

b. Erosion and Sedimentation: Erosion transports weathered materials and deposits them in new locations, potentially concentrating mineral resources. Sedimentation in riverbeds, deltas, and ocean basins can create deposits of heavy minerals like gold, diamonds, and rare earth elements.

Overall, plate tectonics, the rock cycle, and surface processes interact to create, concentrate, and distribute mineral resources. Understanding these processes is crucial for identifying and extracting valuable minerals for human use.

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Answer:

Diffraction Limit. The angular resolution that a telescope could achieve if it were limited only by the interference of light waves; it is smaller (i.e., better angular resolution) for larger telescopes.

Explanation:

Searched it up

Answer:

Attention

Explanation:

Hello there, fellow peer! The answer to question is attention. Let's say someone is the control. The behavioral expression is an element of expression, so the control will feel emotions. Subjective Experience is when someone felt the way you feel and they are trying to help you. That is a type of emotion which can lead to empathy for you. This is also not the answer. Physiological Arousal is also not the answer because this is when you can feel what someone else is feeling and you try to give them therapy.

Using the process of elimination, our answer is therefore attention.

Two of the stressors that people commonly experience are financial stress and relationship stress.

1. I am an AI language model and I do not have the ability to manage stress. However, I can suggest a few stress management techniques:

1. Exercise regularly:

It reduces stress and helps improve overall health.

2. Practice mindfulness:

Mindfulness meditation and other mindfulness-based stress reduction techniques can help you manage stress and anxiety.

3. Get enough sleep:

It helps regulate mood and reduce stress levels.

4. Socialize:

Spending time with family and friends helps reduce stress and boosts happiness levels.

5. Take breaks:

Taking short breaks throughout the day can help you manage stress by allowing you to rest and recharge.

2. Two of the stressors that people commonly experience are financial stress and relationship stress.

1. Financial stress:

It is one of the most common stressors and is caused by factors such as job loss, unexpected expenses, and debt. This type of stress can lead to anxiety, depression, and physical symptoms such as headaches and stomachaches. To manage financial stress, it is important to create a budget and stick to it, reduce unnecessary expenses, and seek help from a financial advisor if needed.

2. Relationship stress:

This type of stress can be caused by conflicts with family members, friends, or romantic partners. It can lead to feelings of loneliness, sadness, and anxiety. To manage relationship stress, it is important to communicate openly and honestly with the other person, set healthy boundaries, and seek professional help if needed.

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Meteorologists label different kinds of weather fronts based on their characteristics and behavior. The four main types are cold fronts, warm fronts, stationary fronts, and occluded fronts.

Cold fronts occur when a cold air mass moves into an area, pushing the warm air ahead of it upwards. These fronts often bring a drop in temperature, strong winds, and precipitation. Cold fronts are typically represented by a blue line with triangles pointing in the direction of the front's movement.

Warm fronts are the opposite, where a warm air mass advances and replaces a cooler one. These fronts cause a gradual increase in temperature and humidity, along with light rain or drizzle. Warm fronts are depicted as a red line with semicircles pointing in the direction of movement.

Stationary fronts form when cold and warm air masses meet but do not displace one another. This type of front can result in extended periods of cloudy and rainy weather. It is represented by alternating blue triangles and red semicircles on opposite sides of a line.

Meteorologists use these labels and symbols to communicate weather patterns and make accurate forecasts.

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Answer:

The density is 1.1gcm3