The bending of light as it moves from one medium to another with differing indices of refraction is due to a change in what property of the light? group of answer choices

The correct answer is C) they both are powered by wind, as hydrokinetic power is generated by the movement of tides and waves. Wind and hydrokinetic power both involve the use of turbines to generate electricity, and both have minimal environmental impacts.

The statement that is not true about wind and hydrokinetic power is "they both are powered by wind. A rotor blade connected to a shaft converts kinetic energy from the wind into mechanical energy. This mechanical energy is used to rotate a shaft. The shaft is connected to a generator, which converts mechanical energy into electrical energy in a wind turbine. Hydrokinetic power, on the other hand, harnesses the energy of moving water, such as ocean waves or tides, and converts it into electricity.

Turbines are used to harness the kinetic energy of moving water and convert it into electrical energy. Thus, statement c) which says that wind and hydrokinetic power both are powered by wind is false as hydrokinetic power uses the energy of moving water.

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65 grams of coffee must evaporate.

Here, we use the formula of heat transfer

Heat loss by the system = heat gain by the system

We need to calculate the heat loss by the coffee and glass itself individually

Heat loss by glass

Heat loss by glass = mass of glass * specific heat capacity *change in temperature

= (120/1000 Kg)* (840)* (48 - 95)

= - 4737.6 J

Heat loss by the glass is -4737.6 J

Similarly we calculate heat loss by coffee

Heat loss by coffee = mass of coffee * specific heat capacity * change in temperature

= (750/1000 Kg) * ( 4184) *( 48 - 95)

= - 147486 J

Heat loss by coffee is -  147486 J

Total heat loss = Heat loss by coffee + Heat loss by glass

= -152223.6 J

evaporation of liquid  = Amount of heat loss

Mass of evaporation * Latent heat = 152223.6 J

Mass of evaporation = 152223.6 / 2340*1000

Mass of evaporation = 0.06505 Kg =  65.05 gram

Hence, 65 grams of coffee evaporates.

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Answer:

No, because beta particles move faster and can penetrate into the human body more easily.

Explanation:

Some beta particles are capable of penetrating the skin and causing damage such as skin burns. However, as with alpha-emitters, beta-emitters are most hazardous when they are inhaled or swallowed.

Answer:

answer is A

Explanation:

The force that is acting on the block is obtained as 980 N.

We know that the reason for the motion of an object is force. When force is acting on a body the object is either made to move, to move faster or to come to a stop. This implies that there are various kinds of forces that could act on a substance.

In this case, we have been told that A 10.-kilogram rubber block is pulled horizontally at constant velocity across a sheet of ice. If we look at the scenario quite well, we can see that the force that would act on the object is the tension on the string. On the other hand, the tension on the string would be equal to the magnitude of the weight of the object.

Hence, force that acts on the object = mg

m = mass

g = acceleration due to gravity

= 10 Kg * 9.8 m/s^2

= 980 N

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The value of distance 'd' is 53.2 meters, measured from the wall, to where the block strikes the ground.

weight = 10 kg

g = 9.8m/s²

x = 5

Using the principle of work and energy,

T₁ +∑U₁-₂ = T₂

0 + 1/2kx² -wh = 1/2 w/g V²

Substituting, we have

0 + 1/2 * 100 * 5² - (10 * 3) = 1/2 * (10/9.8)V²

170 = 0.15528V²

V² = 170/0.15528

V²     = 1094.796

V = √1094.796

V = 48.89/s

But tan ∅ = 3/4

∅ = tan⁻¹3/4

  = 36.87°

From uniform acceleration,

S = S₀ + ut + 1/2gt²

It can be written as

S = S₀ + Vsin∅*t + 1/2gt²

Substituting, we have

0 = 3 + 33.09 * sin 36.87 * t -(1/2 * 9.8 *t²)

19.85t - 16.1t² + 3 = 0

16.1t² - 19.85t - 3 = 0

Solving it quadratically, we obtain t = 1.36s

The distance measure from the wall is given by the formula

d = VCos∅*t

Substituting, we have

d = 48.9 * cos 36. 87 * 1.36

d = 53.2 m

So the value of distance is 53.2 meter.

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Complete question:

The 10-kg block is pressed against the spring so as to compress it 5 m when it is at a point A. If the plane is smooth, determine the distance d, measured from the wall, to where the block strikes the ground. Neglect the size of the block.

If the wavelength of the waves is 20 feet long, the depth of the wave base would be approximately 10 feet deep.

In shallow water, the depth of the wave base is affected by the shape and slope of the seafloor.

If the seafloor is gradually sloping, the wave base will be deeper than if the seafloor is steeply sloping.

Additionally, as waves approach the shore, the decrease in water depth causes the wave speed to decrease and the wavelength to shorten, which in turn affects the depth of the wave base.

In such cases, the depth of the wave base can be calculated using mathematical formulas that take into account the depth of the water and the properties of the waves.

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The force that will move the box at constant velocity must be a little more than 64 N.

The resistance that any two things produce when sliding against one another is known as sliding friction. As the force required to keep one surface moving along another surface, this friction is sometimes referred to as kinetic friction.

The coefficient of sliding friction is obtained from formula;

μ= F/R

Where;

F = frictional force

μ = coefficient of sliding friction

R = Normal reaction

It is important to remember that in order to move a body, a force must be applied that is larger than the frictional force that exists between the body and the surface. As a result, a force of slightly more than 64 N is required to move the box at a constant speed.

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The final answer are 6.06 x 10^15 excess electrons in the cup.

To find the number of excess electrons in the cup, we need to use the formula N=Q/q, where N is the number of excess electrons, Q is the total charge, and q is the charge of a single electron.

Given that the charge of a single electron (q) is -1.602 x 10^-19 and the total charge (Q) is -0.97 uC,

we can plug these values into the formula to find the number of excess electrons:

N=Q/q

N= (-0.97 uC) / (-1.602 x 10^-19)

N= 6.06 x 10^15

Therefore, there are 6.06 x 10^15 excess electrons in the cup.

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Answer:

Both eggs are identical. The aim is to find out the highest floor from which an egg will not break when dropped out of a window from that floor. If an egg is dropped and does not break, it is undamaged and can be dropped again. However, once an egg is broken, that's it for that egg.

The magnitude of the larger of the two individual forces. is 120.5N.

Solution:

x + y = 343

x - y = 177

2x = 520

x = 222.5 N

y = 343 N - 222.5 N = 120.5N.

The resultant force of two forces of equal magnitude is equal to one of the two vectors. In physics, the magnitude of a force is the sum of all forces acting on an object. If all forces act in the same direction, the force magnitude increases. When forces act on an object in different directions, the force magnitude decreases. If one force is stronger than the other, the force will move to the smaller side but the acceleration will be slower. So the result is the difference between the two forces.

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The resistivity of metallic conductors nearly always tends to be low, making them efficient conductors of electricity.

The resistivity of metallic conductors nearly always decreases as the temperature increases. This is because metallic conductors, like metals, have a regular arrangement of atoms and free electrons that facilitate the flow of electric current, making them good conductors of electricity. However, as the temperature increases, the atoms in the conductor vibrate more, leading to increased collisions between electrons and atoms, which in turn reduces the overall resistivity.

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It requires 9600 joules of work to get the wheelbarrow across the yard in 12 seconds. Rounded to the nearest whole number, the answer is 9600 J.

Power is the rate at which work is done or energy is transferred, and it is measured in watts (W). Work is the amount of energy required to move an object, and it is measured in joules (J). Time is the duration over which work is done, and it is measured in seconds (s). Power is calculated by dividing the amount of work done by the time taken to do it, or by multiplying force by velocity. Mathematically, we can represent the relationship between power, work, and time as: Power = Work / Time

We can use the formula: Work = Power x Time

To find the work required, we can plug in the given values:

Work = 800 W x 12 s

Work = 9600 J

Therefore, it requires 9600 joules of work to get the wheelbarrow across the yard in 12 seconds. Rounded to the nearest whole number, the answer is 9600 J.

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Answer:

360²

Explanation:

hoped this helped (ejfigueroa5 had the answer thank you to ejfigueroa5)

The filter bubble and the echo chamber effect are phenomena that occur in the context of information consumption and social media.

The filter bubble refers to the personalized content selection algorithms that create a bubble around individuals by showing them information that aligns with their preferences and beliefs. The echo chamber effect refers to the reinforcement of existing beliefs and opinions through exposure to similar viewpoints and limited exposure to diverse perspectives.

The filter bubble is a result of algorithms used by online platforms to curate content based on an individual's previous online behavior, such as search history, clicks, and social media interactions. This creates a personalized experience where users are presented with content that aligns with their existing preferences and beliefs. For example, if a person frequently reads news articles supporting a particular political ideology, the algorithm may prioritize showing them similar articles and filter out contrasting viewpoints.

The echo chamber effect occurs when individuals are primarily exposed to information and opinions that reinforce their existing beliefs. This can happen within social networks or online communities where people tend to interact with like-minded individuals and consume content that confirms their worldview. For instance, if someone joins an online group dedicated to a specific topic or ideology, they are likely to encounter posts, discussions, and articles that echo their own perspectives, while dissenting views are less likely to be encountered.

Both the filter bubble and the echo chamber effect can contribute to the polarization of society and hinder exposure to diverse viewpoints, leading to limited understanding and dialogue. It is important for individuals to be aware of these effects and actively seek out diverse perspectives to promote a more balanced and informed view of the world.

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The magnitude of the average force is -1.5×10³ N.

What is force?

A force is any action that seeks to preserve, modify, or deform a body's motion.

We know,

The magnitude of the average force is:

F = m(v-u)/t

F = Average force

m = mass of the cyclist

v = Final velocity

u = Initial velocity

t = time.

Putting values into the formula

F = 50(0-10)/0.5

F = -1500 N

F = -1.5×10³ N

The negative sign is the force act against the motion of the cyclist.

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A key piece of evidence that leads astronomers to conclude that most galaxies include a supermassive black hole in the center is the observation of powerful energy emissions and specific signatures associated with active galactic nuclei (AGNs). AGNs are believed to be powered by accretion of matter onto supermassive black holes.

Astronomers have observed that certain galaxies emit tremendous amounts of energy, far beyond what can be explained by other known astrophysical processes. These active galaxies exhibit characteristics such as jets of high-energy particles, intense X-ray and gamma-ray emissions, and variations in brightness over time. These energetic phenomena are consistent with the presence of a supermassive black hole at the center of the galaxy, actively accreting matter and releasing enormous amounts of energy in the process. Additionally, studies of the dynamics of stars and gas in the central regions of galaxies have provided evidence for the existence of supermassive black holes. By measuring the orbital velocities of stars and gas near the galactic center, astronomers can infer the presence of a massive, compact object exerting gravitational influence on its surroundings.

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Sure! Here are the steps for calculating the velocity and distance traveled by the car after 50 seconds :

Step 1: Calculate the velocity using the equation:

\(v = u + at\)

where:

- \(v\) is the final velocity

- \(u\) is the initial velocity (0 m/s, as the car starts from rest)

- \(a\) is the acceleration (3 m/s²)

- \(t\) is the time (50 seconds)

Substituting the values into the equation:

\(v = 0 + (3 \, \text{m/s²}) \times (50 \, \text{s})\)

Step 2: Calculate the distance traveled using the equation:

\(s = ut + \frac{1}{2}at^2\)

where:

- \(s\) is the distance traveled

- \(u\) is the initial velocity (0 m/s)

- \(a\) is the acceleration (3 m/s²)

- \(t\) is the time (50 seconds)

Substituting the values into the equation:

\(s = 0 \times (50 \, \text{s}) + \frac{1}{2} \times (3 \, \text{m/s²}) \times (50 \, \text{s})^2\)

Now, let's simplify these equations:

\(v = 3 \times 50\)

\(s = \frac{1}{2} \times 3 \times 50^2\)

Calculating the results:

\(v = 150\) m/s

\(s = 3750\) meters

Therefore, after 50 seconds, the car will have a velocity of 150 m/s and would have traveled a distance of 3750 meters.

Answer: B) Venus, If distance from the Sun were the only factor considered, Venus would be the only habitable option among the given choices. The Moon lacks a significant atmosphere, and Mercury is too close to the Sun, resulting in extreme temperatures.

If distance from the Sun were the only factor considered, Venus would be the only habitable option among the given choices. While the Moon lacks a substantial atmosphere and experiences extreme temperatures, and Mercury is too close to the Sun with extreme temperature variations, Venus has a unique characteristic. Despite being closer to the Sun than Earth, Venus has a thick atmosphere that creates a greenhouse effect, trapping heat and raising its surface temperature to extremely high levels. This thick atmosphere could potentially provide a stable environment for liquid water and make Venus habitable, at least in terms of surface conditions. However, other factors such as the composition of the atmosphere and the presence of other essential elements would also influence habitability.

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Conduction: heat transfers by direct contact

Convection : heat transfers within fluid

Radiation: heat transfers due to electromagnetic waves

Conduction: 7 , 8 ,

Convection : 10

Radiation : 6,9

The first step is to convert the parallax angle of the star to distance. We can use the formula: parallax angle in arc seconds = (distance to star in parsecs)^-1 We can rearrange this equation to isolate distance: d = (parallax angle)^-1 Therefore, the distance to the star in parsecs is:

d = (0.0190 arcseconds)^-1 = 52.6 parsecs Next, we need to find the actual distance in meters. One parsec is equivalent to 3.09 × 10^16 meters. Therefore, the distance to the star in meters is: distance = (52.6 parsecs)(3.09 × 10^16 meters/parsec) = 1.63 × 10^18 meters Now, we can use the formula for time: d = vt Solving for time: t = d/v We are told to travel at half the speed of light, which is v = 0.5c, where c is the speed of light.

Therefore, the time to travel to the star is: t = (1.63 × 10^18 meters)/(0.5c) Using the speed of light, c = 3.00 × 10^8 m/s, we get: t = (1.63 × 10^18 meters)/(0.5 × 3.00 × 10^8 m/s)t ≈ 10.9 years Therefore, it would take about 10.9 years to travel to the star if traveling at half the speed of light.

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To produce 180 more tanks starting from point "b" (420 tanks and 800 bushels of corn), the society would need to increase its corn production by 540 bushels.

In order to produce more tanks, the society needs to allocate additional resources to tank production. Let's assume that each tank requires 3 bushels of corn as raw material. Since the society wants to produce 180 more tanks, it would need an additional 180 tanks * 3 bushels per tank = 540 bushels of corn.

To meet this increased demand for corn, the society must increase its corn production. Starting from point "b" with 800 bushels of corn, they would need to produce an additional 540 bushels of corn to reach the required total of 1,340 bushels (800 + 540).

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The braking force applied to Dizzy's car is approximately 50,600 Newtons in the opposite direction to the car's motion.

Braking force is the force applied by a vehicle's brakes to slow down or stop the vehicle. To determine the braking force applied to Dizzy's car, we can use the equation:

force = mass x acceleration

where the acceleration is the rate at which the car's velocity changes during braking.

First, we need to calculate the initial velocity of the car before braking:

v0 = 22.8 m/s

Next, we need to calculate the final velocity of the car after braking:

vf = 2.9 m/s

The change in velocity, or delta-v, is:

delta-v = vf - v0 = 2.9 m/s - 22.8 m/s = -19.9 m/s

Note that the negative sign indicates a decrease in velocity.

We also need to calculate the time it takes for the car to come to a stop. We can use the equation:

delta-x = (v0 + vf) / 2 x t

where delta-x is the distance traveled during braking, which is given as 5.55 m.

Rearranging the equation, we get:

t = 2 x delta-x / (v0 + vf)

Substituting the given values, we get:

t = 2 x 5.55 m / (22.8 m/s + 2.9 m/s) = 0.393 s

Now we can calculate the acceleration:

acceleration = delta-v / t = (-19.9 m/s) / (0.393 s) = -50.6 m/s^2

Again, the negative sign indicates a deceleration or braking acceleration.

Finally, we can calculate the force applied to the car:

force = mass x acceleration

The mass of the car is not given, but we can assume it is approximately the same as the average mass of a roller coaster car, which is around 1000 kg.

Substituting the values, we get:

force = 1000 kg x (-50.6 m/s^2) = -50,600 N

Therefore, the braking force applied to Dizzy's car is approximately 50,600 Newtons in the opposite direction to the car's motion.

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Answer:

GET GOOD

Explanation:

The characteristics of the capacitors can be found answer of which is the most important precaution before connecting a capacitor is:

A capacitor in a computer that consists of metallic plates with an electrical charge in them, the main function of a capacitor is to store energy.

As a capacitor is an energy storage system, it has a charge Q on each plate, so it must be used with caution among the main measures we have.

In conclusion with the characteristics of the capacitors we find that the answer is the most important precaution before connecting a capacitor is:

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Hi there!

Voltage in a series can be expressed by the following:

\(V_T = V_1 + V_2\)

In words, the total voltage is equal to the sum of the individual voltage drops in a SERIES circuit.

We can solve for the total voltage:

\(V_T = 10 + 10 = \boxed{\text{ D. 20 V}}\)

Answer:

20 v

Explanation:

Answer:

:)

Explanation:

To find the maximum angle of incidence for which a light ray can emerge into the air above the water, we can apply Snell's law, which relates the angles and refractive indices of the two media involved.

Snell's law states:

n1 * sin(∅1) = n2 * sin(∅2)

where:

n1 is the refractive index of the first medium (in this case, glass),

∅1 is the angle of incidence,

n2 is the refractive index of the second medium (in this case, water),

∅2 is the angle of refraction.

In this problem, the light is incident from the glass into the water, so n1 is the refractive index of glass and n2 is the refractive index of water.

The critical angle (∅c) is the angle of incidence at which the refracted angle becomes 90°. When the angle of incidence exceeds the critical angle, the light is totally internally reflected and does not emerge into the air.

The critical angle can be calculated using the equation:

∅_c = arcsin(n2 / n1)

In this case, the refractive index of glass (n1) is approximately 1.5, and the refractive index of water (n2) is approximately 1.33.

∅_c = arcsin(1.33 / 1.5)

∅_c ≈ arcsin(0.8867)

∅_c ≈ 60.72 degrees

Therefore, the maximum angle of incidence for which a light ray can emerge into the air above the water is approximately 60.72 degrees.

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