When you drop a golf ball, why does it not bounce as high as the initial drop point
height? (hint: 2 reasons should be given)

Section 25.1: 1.) white light, 2.)incandescence, 3.) emitting photons , 4.)  photon, 5.) orange, 6.) visible light, 7.) nanometers, 8.) electromagnetic spectrum, 9.) photon

Rods are the type of photoreceptor cell in retina and are sensitive to light levels and help give us good vision in low light.

Section 25.2

10. Cone cell specializes in detecting color.

11. Rod cell specializes in detecting light intensity

12. Human eye has 137 million : photoreceptors.

13. An HDTV screen has more than an ordinary TV screen : pixels

14. Magenta is a pigment used in the color model : CMYK

15. The is used by video cameras to achieve a range of colors : RGB color model

Section 25.3

16. A surface with produces a single beam of reflected light rays : specular reflection

17. occurs when light enters a material and bends : Refraction

18. Three examples of optical devices are converging lens,  diverging lens and prism.

19. Glass is transparent material because light passes through it without scattering.

20. Materials that allow light to pass but scatter it in all directions : translucent

21. The index of refraction of water is 1.33  

22. Surfaces that scatter light when it reflects have : rough surfaces

23. Converging lens bends light rays inward toward the focal point

24. Diverging lens bends light rays outward away from the focal point.

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Answer:

a = - 50 [m/s²]

Explanation:

To solve this problem we simply have to replace the values supplied in the given equation.

Vf = final velocity = 0.5 [m/s]

Vi = initial velocity = 10 [m/s]

s = distance = 100 [m]

a = acceleration [m/s²]

Now replacing we have:

\((0.5)^{2}-(10)^{2} = 2*a*(100)\\0.25-10000=200*a\\200*a=-9999.75\\a =-50 [m/s^{2} ]\)

The negative sign of acceleration means that the ship slows down its velocity in order to land.

True.  The outer planets, like Jupiter, are called gas giants because they are composed mainly of hydrogen and helium gas. They are much larger than the inner planets because they were able to capture a larger amount of gas and dust during their formation due to their stronger gravitational pull.

This is why they have a more gaseous composition compared to the rocky inner planets.
The outer planets, including Jupiter, formed in regions of the solar system where there was an abundance of lighter elements, such as hydrogen and helium, in gaseous form. These planets could incorporate these gases into their mass, making them larger and giving them their mainly gaseous compositions.

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The outer planets, such as Jupiter, are indeed larger and composed mainly of gas due to a larger supply of material available for them to incorporate into their mass.

During the early stages of the solar system, the outer region of the solar nebula contained more gas and dust compared to the inner regions.

As a result, the outer planets had more material to accumulate and grow larger. In summary, the larger supply of material in the outer regions of the solar system allowed the outer planets to grow larger and become mainly composed of gas.

Hence, The outer planets, such as Jupiter, are indeed larger and composed mainly of gas due to a larger supply of material available for them to incorporate into their mass.

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To achieve total internal reflection, the minimum refractive index of the plastic must be at least 0.869 when a ray of light is incident at an angle of 61 degrees on the center of one side of the plastic slab in air.

The minimum refractive index of the plastic can be found , we need to consider the conditions for total internal reflection.

Total internal reflection occurs when the angle of incidence is greater than the critical angle, which is the angle at which the refracted ray is at a 90-degree angle to the normal.

In this scenario, the ray of light is incident on the plastic at an angle of 61 degrees. We can use Snell's law to relate the angle of incidence to the angle of refraction:

n1 * sin(angle of incidence) = n2 * sin(angle of refraction)

Here, n1 is the refractive index of air (approximately 1), and n2 is the refractive index of the plastic.

Since we want the light to be totally internally reflected, the angle of refraction will be 90 degrees. Thus, we have:

1 * sin(61 degrees) = n2 * sin(90 degrees)

Rearranging the equation, we get:

n2 = sin(61 degrees) / sin(90 degrees)

Calculating this expression, we find that n2 is approximately 0.869.

Therefore, the minimum refractive index of the plastic should be at least 0.869 to ensure total internal reflection in this scenario.

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Complete question:

A ray of light is incident on a square slab of transparent plastic in air. It strikes the center of one side at an angle of 61 degrees. Find the minimum refractive index of the plastic if the light is to be totally internally reflected.

Promoting the culture of your country in a creative way requires a combination of civic engagement and creative expression. Here are some civic-minded approaches you can consider:

Cultural Events and Festivals: Organize or participate in cultural events and festivals that showcase the traditions, music, dance, food, and arts of your country. These events can bring people together, foster cultural exchange, and create a sense of pride in your country's heritage.

Cultural Education: Collaborate with schools, community centers, and local organizations to develop cultural education programs. These programs can include workshops, lectures, or classes that teach traditional crafts, languages, history, or other aspects of your country's culture.

Cultural Preservation: Engage in efforts to preserve and protect cultural landmarks, historical sites, and artifacts. This can involve volunteering for restoration projects, advocating for heritage preservation laws, or raising awareness about the importance of cultural heritage.

Cultural Exchange Programs: Initiate or participate in cultural exchange programs that allow people from different countries to share experiences and learn about each other's cultures. This can be done through student exchanges, artist collaborations, or cultural immersion programs.

Online Presence: Utilize social media platforms, blogs, or websites to share stories, photos, and videos that highlight the cultural richness of your country. This can reach a wider audience and create opportunities for cross-cultural dialogue.

Collaborations with Artists: Support and collaborate with local artists, musicians, filmmakers, and writers who can contribute to promoting your country's culture through their creative works. This can include organizing exhibitions, concerts, film screenings, or publishing cultural literature.

Cultural Tourism: Work with local tourism authorities to develop cultural tourism initiatives that showcase the unique aspects of your country's culture. This can involve creating cultural tours, promoting traditional accommodations, or organizing cultural exchange programs for tourists.

Remember, promoting your country's culture in a creative way requires a sense of civic responsibility, respect for diversity, and a commitment to preserving and celebrating your heritage. By engaging the community and utilizing creative platforms, you can inspire others to appreciate and embrace the culture of your country.

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The figure below showing electrons moving along an electric current towards and away from the light bulb with arrows pointing right and left in both directions, indicates that the current is alternating.

What is Electric Current?

It is the rate at which electric charges move through a circuit, measured in amperes (A). Electric current is caused by the movement of electrons, which carry a negative charge, and it flows from a region of higher electric potential to a region of lower electric potential.

Electric current can be produced by a variety of sources, including batteries, generators, and power plants. The amount of current that flows through a circuit depends on the voltage, or electric potential difference, and the resistance of the circuit. Ohm's law describes the relationship between these variables: current is equal to voltage divided by resistance (I = V/R).

In an alternating current (AC), the flow of electric charge changes direction periodically, typically 50 or 60 times per second (50 or 60 Hertz). The direction of the current reverses periodically, causing the electrons to move back and forth, as shown in the figure. In a direct current (DC), the flow of electric charge is always in one direction, and the electrons move in one direction only.

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The displacement is 12.903 km east.

Explanation

Step 1

Diagram

so

Vertical motion is the movement of an object in a straight line. When an object is thrown up, it always comes down, as it is affected by the acceleration due to gravity.thus, the only acceleration is due to gravity, when going up, the acceleration due to gravity " desacelerates the object " and a constant rate, al

so,it has a constant acceleration

also, the law of conservation of energy states that the amount of energy is neither created nor destroyed,so after the object reaches it s maximum heigth the gravitational potential energy is converted to kinetic energy when the mass moves downward,as there is not resistance it, the kinetick energy will be the same, becuase

and the mass , and the

The rod and ring must be heated to 92.5°C above 20°C, or approximately 112.5°C, so that the ring just barely slips over the rod.

Diameter of the hole at 20°C = 2.50 cm - 5.0 mm = 2.45 cm

Let ΔT be the temperature change required for the hole to expand by 2.00 mm, which is the difference between the diameter of the steel rod and the diameter of the expanded hole in the brass ring. The coefficient of thermal expansion of brass is 18 × 10⁻⁶ per degree Celsius, and the coefficient of thermal expansion of steel is 11 × 10⁻⁶ per degree Celsius.

The change in diameter of the brass ring due to the temperature change is:

Δd = d₀ α ΔT

where d₀ is the original diameter of the hole in the brass ring at 20°C, α is the coefficient of thermal expansion of brass, and ΔT is the change in temperature.

Similarly, the change in diameter of the steel rod is:

Δd = d₀ α Δ

where d₀ is the original diameter of the steel rod at 20°C, α is the coefficient of thermal expansion of steel, and ΔT is the change in temperature.

Since the total change in diameter must be 2.00 mm, we have:

Δd_brass + Δd_steel = 2.00 mm

Substituting the expressions for Δd and solving for ΔT, we get:

d₀_brass α_brass ΔT + d₀_steel α_steel ΔT = 2.00 mm

ΔT = 2.00 mm / (d₀_brass α_brass + d₀_steel α_steel)

Substituting the values, we get:

ΔT = 2.00 mm / [(2.45 cm) (18 × 10⁻⁶ per degree Celsius) + (2.00 cm) (11 × 10⁻⁶ per degree Celsius)]

ΔT ≈ 92.5°C

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Answer:

Explanation:

Elastic collisions occur when two objects collide and kinetic energy isn't lost. The objects rebound from each other and kinetic energy and momentum are conserved.

Inelastic collisions are said to occur when the two objects remain together after the collision. They deform in some way losing energy. Objects bounce back less or not at all. There is a loss of kinetic energy even if the momentum is conserved.

1. Elastic Collision - No deformation

2.Elastic, since velocities are exchanged, no loss of KE

3.Inelastic Collision- objects moving together after collision

4.Inelastic Collision - KE is not conserved

5.Elastic Collision - KE is conserved.

Answer:

power

Explanation:

google

The direction and magnitude of the electric field that generates a charge of -6. 3 µC at 0. 50cm and 2. 75mm is 226.5 × 10³ N/C and 7490 × 10⁶ N/C. In the direction towards the charge.

The electric field created by a particular electric charge Q is defined as the space surrounding the charge in which another charge q can experience electrostatic attraction or repulsion caused by the charge Q.

As a result, E is a vector quantity that moves together with the test charge +q in the direction of the force.

The electric field E is given by,

E = q/4π∈r²

where q is charge, ∈ is permittivity of free space, r is distance.

For 50 cm = 0.5 m

Electric field E is,

E = -6. 3 × 10⁻⁶ C/4π × 8.85×10⁻¹² m⁻³kg⁻¹ s⁴ A² × 0.5²

E = 226.5 × 10³ N/C

For 2.75 mm = 0.00275 m

Electric field E is,

E = -6. 3 × 10⁻⁶ C/4π × 8.85×10⁻¹² m⁻³kg⁻¹ s⁴ A² × 0.00275²

E = 7490 × 10⁶ N/C

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Trailing azalea grows in harsh environments such as rocky slopes, cliffs, and other areas with poor soil and low moisture.

Trailing azalea, also known as Rhododendron canescens, is a native plant in the southeastern United States. This plant prefers acidic soils, but it can grow in a variety of soil types, including poor soil with low moisture. Trailing azalea is commonly found growing on rocky slopes, cliffs, and other areas with harsh environmental conditions. It is a hardy plant that can withstand drought and extreme temperatures.

In summary, trailing azalea grows in harsh environments such as rocky slopes, cliffs, and areas with poor soil and low moisture. This plant is adapted to survive in these challenging conditions, making it an important part of the ecosystem in the southeastern United States.

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Answer:6.4 meters eastward

Explanation: you’re displacement is supposed to be the distance of the initial position to the final position (where you started to where you finished) so that means you would have to subtract 9.2 by 2.8 to get 6.4, and because you subtracted from 9.2 the direction is eastward.

Hope I helped!

Answer:This is the Difference Between a Hypothesis and a Theory. ... In scientific reasoning, a hypothesis is an assumption made before any research has been completed for the sake of testing. A theory on the other hand is a principle set to explain phenomena already supported by data.

Explanation:

The force of gravity between two magnets is really considerably smaller than the magnetic force, despite the fact that two magnets correctly aligned would attract and stay together firmly.

Any two mass-containing things in the cosmos are subject to the basic natural force of gravity. According to the formula F = G * m1 * m2 / r2, where F is the force, G is the gravitational constant, m1 and m2 are the masses of the two objects, and r is the distance between them, the gravitational force between two objects varies in strength depending on their masses and the distance between them. The magnetic fields of two magnets are what create the force between them. Two magnets are aligned properly and it causes them to stick together tightly.

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Answer:

It is the result of the photoelectric effect.

Answer:

B

Explanation:

The block gains 4.49 J of kinetic energy as it moves a distance of 2 m

The increase in kinetic energy of an object can be calculated using the equation:

ΔKE = 1/2 (m)(Δv^2)

where;

To find the change in velocity, we can use the equation of motion, which states that the net force on an object is equal to its mass times its acceleration:

F = ma

Rearranging this equation, we can find the acceleration:

a = F / m

The acceleration is the same before and after the force increases, so we can equate the two and solve for Δv:

F1 / m = F2 / m

F1 / m = (F1 + ΔF) / m

ΔF / m = F2 / m - F1 / m

ΔF / m = (12 N) / (2 kg) - (5 N) / (2 kg)

ΔF / m = 4.5 m/s^2

Δv = √(2 * ΔF / m)

Now that we have Δv, we can plug this value into the equation for ΔKE:

ΔKE = 1/2 * m * Δv^2

ΔKE = 1/2 * 2 kg * (2.12 m/s)^2

ΔKE = 4.49 J

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Therefore, the radius of curvature of the convex surface of the planoconvex lens made from fused quartz should be approximately 9.062 cm.

To determine the radius of curvature of the convex surface of a planoconvex lens, we can use the lensmaker's formula, which relates the focal length (f) of a lens to its radius of curvature (R) and the refractive index (n) of the lens material. The formula is as follows:

1÷f = (n - 1) × ((1÷R₁) - (1÷R₂)

In the case of a planoconvex lens, one of the surfaces is flat, so the radius of curvature of that surface is infinite. We can assume the flat surface is on the rear of the lens, so R₁ is infinite. Thus, the formula simplifies to:

1÷f = (n - 1) ÷ R₂

Given:

Focal length (f) = 19.7 cm

Refractive index (n) for fused quartz = 1.46

Substituting the values into the formula:

1÷19.7cm = (1.46 - 1) ÷ R₂

Simplifying the equation:

R₂ = (1.46 - 1) ÷ (1÷19.7 cm)

R₂ = 0.46 ÷(1÷19.7 cm)

R₂ = 0.46 × (19.7 cm)

R₂ =9.062 cm

Therefore, the radius of curvature of the convex surface of the planoconvex lens made from fused quartz should be approximately 9.062 cm.

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The soil loss in  \(Mg ha^{-1}\) (Ton/ha) if the bulk density of the soil is 1.01  \(Mg m^{-3}\)  is option a. 0.202 Mg/ha.

For expressing the soil loss in \(Mg ha^{-1}\), need to convert the units appropriately. First, convert the soil loss from millimetres (mm) to meters (m) by dividing it by 1,000 (1 mm = 0.001 m). Thus, the soil loss is 0.0002 m.

Next, calculate the volume of soil lost per unit area (ha). The volume can be obtained by multiplying the soil loss (0.0002 m) by the area (ha). Since the bulk density of the soil is given as 1.01 \(Mg m^{-3}\), can convert the volume to mass by multiplying it by the bulk density.

Using the formula:

Soil loss (Mg ha-1) = Soil loss (m) × Bulk density (\(Mg m^{-3}\)) × Area (ha)

Substituting the values:

Soil loss (\(Mg ha-1\)) = 0.0002 m × 1.01 \(Mg m^{-3}\) × 1 ha

Calculating the result:

Soil loss (\(Mg ha-1\)) = 0.0002 × 1.01 = 0.000202 \(Mg ha-1\)

Therefore, the correct answer is option a. 0.202 Mg/ha.

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Hebb's rule is based on the associative laws of frequency and contiguity.

Hebb's rule is the based on the frequency and contiguity associative principles. This means that the stronger the link between two neurons gets the more frequently they are triggered together and the closer in time their activations occur.

This is because, according to Hebb's rule, "cells that fire together wire together," which means that synapses connecting neurons that are the active at the same moment become stronger over time.

This process is the assumed to be at the root of many types of learning and memory in the brain.

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Answer:

El observador verá correr al perro sobre la cubierta del barco a una velocidad de 40 kilómetros por hora.

Explanation:

Para determinar la velocidad del perro con respecto al observador sentado desde la playa a través del concepto de velocidad relativa, descrito en la siguiente fórmula:

\(v_{P/B} = v_{P} - v_{B}\) (1)

Donde:

\(v_{P/B}\) - Velocidad del perro relativo al barco, en kilómetros por hora.

\(v_{P}\) - Velocidad del perro con respecto al observador, en kilómetros por hora.

\(v_{B}\) - Velocidad del barco con respecto al observador, en kilómetros por hora.

Si sabemos que \(v_{B} = 30\,\frac{km}{h}\) y \(v_{P/B} = 10\,\frac{km}{h}\), entonces la velocidad del perro con respecto al observador es:

\(v_{P} = v_{B} + v_{P/B}\)

\(v_{P} = 30\,\frac{km}{h} + 10\,\frac{km}{h}\)

\(v_{P} = 40\,\frac{km}{h}\)

El observador verá correr al perro sobre la cubierta del barco a una velocidad de 40 kilómetros por hora.

Answer:

C) he had more power running than walking

Explanation:

saw it on a quizlet. not 100% sure tho

Hiro walks up a flight of stairs in his apartment building. Later in the day, he runs up the same flight of stairs so He had more power running than walking.

In physics, power is the amount of energy transferred or converted per unit of time. In the International System of Units, the unit of power is the watt, equal to one joule per second. In older works, power is sometimes called activity. Power is a scalar quantity.

Power is related to other quantities; for example, the power involved in moving a ground vehicle is the product of the traction force on the wheels and the velocity of the vehicle.

The output power of a motor is the product of the torque that the motor generates and the angular velocity of its output shaft

Since we know that Hiro will run on stairs to minimize the time of reaching his home so if time decreases then he has to increase his power as power is the ratio of work and time.

Hence Hiro walks up a flight of stairs in his apartment building. Later in the day, he runs up the same flight of stairs so He had more power running than walking.

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Answer:

1,1 m

Explanation:

Dado que;

coeficiente de fricción = 0,6

sabemos que W = R = mgcos 37 = 3.5Kg * 10m / s ^ 2 * cos37 = 27.95 N

coeficiente de fricción = fuerza / reacción normal (R)

Fuerza = 0.6 * 27.95 N

Fuerza (F) = 16.77 N

Recuerda que F = Ke

dónde;

K = constante de fuerza (15N / m)

e = extensión (lo desconocido)

e = F / K

e = 16,77 N / 15 N / m

e = 1,1 m

The amperage represents the rate at which electric charge flows through a conductor.

What is amperage?

Amperage is a measure of electrical current, or the rate at which electrical charge flows through a circuit. It is measured in units of amps (A). Amperage is related to voltage and resistance in an electrical circuit, and can be calculated using Ohm's law. Amperage is important to consider when sizing electrical components and wiring for a circuit, as too much amperage can cause damage to the components.

The amperage, also known as current, represents the rate at which electric charge flows through a conductor. It is measured in amperes (A) and is a measure of the quantity of electric charge that passes through a given point in a circuit per unit of time. In other words, amperage is a measure of how many electrons are flowing through a wire at a given moment. A low amperage means that there is a small amount of electric charge flowing through the conductor. This could be because the resistance of the conductor is high, or because the voltage of the power source is low. A low voltage, on the other hand, means that there is a small potential difference between two points in a circuit, which means that the electric charge is not being pushed as hard and may not be flowing as quickly.

Therefore, it represents the rate at which electric charge flows through a conductor.

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Every photon has some energy within it and that energy is called photon energy.

The energy of photon is \(2.38\times10^{-18}\;\rm J\).

Given that, frequency of the photon is \(3.6\times10^{15}\;\rm Hz\) and Planck's constant is \(6.626\times {{10}^{-34}}\).

So the energy of the photon can be calculated by the given formula.

\(E=h\nu\)

Where \(h\) is plank's constant and \(\nu\) is the frequency of the photon.

By substituting the values in the above formula, the photon energy is,

\(E=6.626\times10^{-34}\times3.6\times10^{15}\;\rm J\)

\(E=2.38\times10^{-18}\;\rm J\)

The energy of photon is \(2.38\times10^{-18}\;\rm J\).

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Answer:

4.8 m/s

Explanation:

For tennis ball "A", we are told that;

Initial velocity; u = 0 m/s

Distance; h = 10 m

Acceleration; a = 5 m/s²

Thus, using Newton's equation of motion, we can find time(t).

h = ut + ½at²

10 = 0 + ½(5)t²

10 = ½(5t²)

t² = 2 × 10/5

t² = 4

t = √4

t = 2 seconds

Now, this time would be the same for ball B since we are told that they reach the bottom at the same time.

Now, since ball B is thrown upwards, it means it is thrown against gravity. Thus;

h = -ut + ½gt²

10 = -2u + ½(9.8)(2²)

Where u is initial velocity of Ball B.

Thus;

10 = -2u + 19.6

2u = 19.6 - 10

2u = 9.6

u = 9.6/2

u = 4.8 m/s