A lens for a spotlight is coated so that it does not transmit yellow light. if the light sources is white, what color is the spotlight

This answer deals with the key differences between prokaryotic and eukaryotic cells, in addition to explaining a part of the cell theory. Eukaryotic cells are usually found in complex organisms like plants, animals, fungi and protists, while prokaryotic cells are found in bacteria. The cell theory does not concern with the types of cells, hence 'there are two main types of cells' is not a part of the cell theory.

1. The statement which is not a part of the Cell Theory is 'c) There are two main types of cells.'

2. Both Prokaryotes and Eukaryotes contain genetic material such as DNA.

3. Eukaryotes only plants are an example of me.

4. Eukaryotes only protists are an example of me.

5. Your body cells are made of Eukaryotes only type of cell.

6. Both Prokaryotes and Eukaryotes contain cytoplasm.

7. Eukaryotes only contain membrane-bound organelles.

8. Both Prokaryotes and Eukaryotes contain ribosomes.

9. Eukaryotes only Animals are an example of me.

10. Eukaryotes only fungi are an example of me.

11. Prokaryotes only bacteria are an example of me.

12. Eukaryotes only have a nucleus.

13. Both Prokaryotes and Eukaryotes have a cell membrane.

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Explanation of what happens to a soccer ball as it rolls down a ramp due to the gravitational force.

When a soccer ball rolls down a ramp, it behaves similarly to a basketball rolling down a playground slide. As the soccer ball starts rolling down the ramp, its velocity increases due to the force of gravity pulling it towards the Earth's center. This gravity is a consistent force that works on the ball acting down the ramp. On a straight slope, the ball's velocity will increase, and the velocity will be the greatest just before the ball begins to rise up another ramp or before it comes to a stop. The acceleration of the ball is constant while it is on the straight section of the ramp assuming no air friction or rolling resistance. As the ball moves down the ramp, it is transitioning from a state of higher gravitational potential energy to one with higher kinetic energy; the greatest kinetic energy is present when the ball is at the bottom of the ramp, moving at its fastest speed. If the ramp is altered in height or angle, so too will the path and velocity of the soccer ball change.

Answer:

[tex]\theta = 16 degree[/tex]

Explanation:

Displacement in horizontal direction(d) = 22 m

displacement in vertical direction(h) = 6.2 m

As we know that total displacement is the straight line which joins the initial position and final position of the object

so here we will have

[tex]tan\theta = \frac{h}{d}[/tex]

now plug in all data in it

[tex]tan\theta = \frac{6.2}{22}[/tex]

[tex]\theta = tan^{-1}(0.282)[/tex]

[tex]\theta = 15.74 degree[/tex]

since we have to give the answer in two significant digit so it is

[tex]\theta = 16 degree[/tex]

The International space station is located at the height of [tex]\boxed{369\,{\text{km}}}[/tex]  above the surface of the Earth.

Further Explanation:

The height of the international space station above the surface of the earth is given by the Kepler’s Law of planetary motion. According to this law, the square of time period of the satellite is directly proportional to the cube of the radius of the circular path of the satellite.

Given:

The speed of revolutions made by the International space station is [tex]15.65\,{{{\text{rev}}}\mathord{\left/{\vphantom{{{\text{rev}}}{{\text{day}}}}}\right.\kern-\nulldelimiterspace}{{\text{day}}}}[/tex] .

Concept:

The angular speed of rotation of the International space station is:

[tex]\begin{aligned}\omega&=2\pi\times\frac{{15.65}}{{24\times60\times 60}}\,{{{\text{rev}}}\mathord{\left/{\vphantom{{{\text{rev}}}{{\text{sec}}}}}\right.\kern-\nulldelimiterspace}{{\text{sec}}}}\\&=2\pi\times1.811\times{10^{ - 4}}\,{{{\text{rad}}}\mathord{\left/{\vphantom{{{\text{rad}}}{{\text{sec}}}}}\right.\kern-\nulldelimiterspace}{{\text{sec}}}}\\\end{aligned}[/tex]

The time period of rotation of the International space station is:

[tex]T=\frac{{2\pi }}{\omega }[/tex]

Substitute [tex]\omega[/tex]  in above expression.

[tex]\begin{aligned}T&=\frac{{2\pi}}{{2\pi\times1.811\times{{10}^{ - 4}}\,}}\\&=5520.7\,{\text{s}}\\&\approx{\text{5521}}\,{\text{s}}\\\end{aligned}[/tex]

The expression for the Kepler’s law is:

[tex]\begin{aligned}{T^2}&=\left({\frac{{4{\pi ^2}}}{{GM}}}\right){R^3}\\R&={\left({\frac{{GM{T^2}}}{{4{\pi^2}}}}\right)^{\frac{1}{3}}}\\\end{aligned}[/tex]

Here, [tex]G[/tex]  is the gravitational constant, [tex]M[/tex]  is the mass of the Earth.

Substitute the values in above expression.

[tex]\begin{aligned}R&={\left({\frac{{\left( {6.67\times{{10}^{ - 11}}}\right)\times\left({5.98\times{{10}^{24}}}\right)\times{{\left( {5521}\right)}^2}}}{{4\times{{\left({3.14}\right)}^2}}}}\right)^{\frac{1}{3}}}\\&={\left({\frac{{1.21\times{{10}^{22}}}}{{39.48}}}\right)^{\frac{1}{3}}}\\&=6.74\times{10^6}\,{\text{m}}\\\end{aligned}[/tex]

The radius of the Earth is [tex]6.371\times{10^6}\,{\text{m}}[/tex] .

The height of space station above the surface of Earth is given below:

[tex]\begin{aligned}h&=\left({6.74\times{{10}^6}}\right)-\left({6.371\times{{10}^6}}\right)\\&=3.69\times{10^5}\,{\text{m}}\\&=3{\text{69}}\,{\text{km}}\\\end{aligned}[/tex]

Thus, the International space station is located at the height of  [tex]\boxed{369\,{\text{km}}}[/tex] above the surface of the Earth.

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Answer Details:

Grade: High School

Subject: Physics

Chapter: Gravitation

Keywords:

International space station, 15.65 revolutions, circular orbit, around the earth, high, satellite, above the surface, 5521 s, 369 km.

Answer:

The correct answer is "the dollar to appreciate when compared to the Euro".

Explanation:

If fewer US dollars are required to buy one euro, this means that the value of the euro concerning this currency would fall. Therefore the dollar appreciates against the euro. This way you can buy more euros with the same amount of dollars you had before.

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Erosion, Nutrient Depletion and Desertification are the three problems that can result from poor soil management.

Poor soil management is damages environment and is a threat to our food supply. It results in erosion, nutrient depletion, desertification which makes the soil less fertile and unproductive and thus affects our food supply.

Answer:

FALSE

Explanation:

The lesson says-

"At first, the body can't change quickly enough to give the muscles the amount of oxygen they need. This situation produces an oxygen deficit in the muscles. During this oxygen deficit, the muscles don't have the necessary amount of oxygen they need in order to produce enough energy to keep moving. Instead of the muscles just stopping, however, the body has a second system that kicks in during emergencies."

Jurgen Habermas is a German philosopher and sociologist which is an expert in the field of critical conjecture and pragmatism. He is most widely known for his theories regarding communicative rationality and the public sphere. This concept of intersubjectivity is called as:

“Intersubjectivity of mutual understanding”

Jürgen Habermas's concept of intersubjectivity relates to the individual and social capacity to create understanding through communication. It is central to the public sphere where free, rational discourse among citizens influences political action. Habermas emphasizes communicative action as essential for democratic governance.

The concept of intersubjectivity, introduced by Jurgen Habermas, refers to an individual capacity and a social domain where understanding is constructed in communication among individuals. Habermas places emphasis on the role of the public sphere, an arena separate from the state and the private sector, that facilitates free, rational discourse among citizens. This realm enables the collective deliberation and influence on political action. The development of the public sphere historically marked the movement away from feudal structures towards more democratic forms of governance, particularly during the European Enlightenment. Moreover, Habermas's view on communicative action as the process by which social actors engage and create shared understandings, shapes the political landscape through open and inclusive debate.

Answer: 120 J

Explanation:

The law of conservation of energy states that energy cannot be created nor destroyed, but only converted into other forms.

In this problem, we have an initial amount of electrical energy, E, converted into two forms of energy: light energy (L) and heat (H). For the law of conservation of energy, we have:

[tex]E=L+H[/tex]

So, we can find the initial amount of electrical energy:

[tex]E=20 J+100 J=120 J[/tex]

Answer:

tossing it horizontally at a faster speed

Explanation:

The property that objects have to fall when released from a certain height from the ground was well known since ancient times. For much of our history, the free-falling motion of objects was considered natural, ignoring the need for any causative agent. It was not until the seventeenth century that the English scientist Isaac Newton formulated a theory capable of explaining the cause of these movements and describing them precisely: the law of universal gravitation.

Under this law, free fall is a uniformly accelerated motion and causes any object influenced by the acceleration of gravity to move. This explains why the ball, dropped by Cecelia, fell in a straight path to the ground. According to this law, if Cecelia wanted the ball to travel the widest possible path during the fall, she should play the ball horizontally at a faster speed.

The size of a star directly affects its luminosity because larger stars have a larger surface area and can emit more light and heat. On the other hand, smaller stars have a smaller surface area and emit less light, resulting in a lower luminosity.

The size of a star affects its luminosity because the luminosity of a star is directly related to its surface area. Larger stars have a larger surface area, which allows them to emit more light and heat, resulting in a higher luminosity. On the other hand, smaller stars have a smaller surface area and emit less light, leading to a lower luminosity.

For example, let's consider two stars of the same temperature, but different sizes. The larger star will have a greater luminosity because it has a larger surface area from which it can radiate energy. Conversely, the smaller star will have a lower luminosity due to its smaller surface area.

Therefore, the size of a star directly impacts its luminosity, with larger stars being more luminous than smaller stars.

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Answer:

The disturbance that occurs as longitudinal waves travel through a medium can be described as rarefactions and compressions.

Explanation:

As longitudinal waves travel, particles in the medium are pushed together and then pulled apart. We call this rarefactions and compressions.

The equation that we can use in this case is:

y = v0 t + 0.5 a t^2

where, y is the height, v0 is initial velocity = 0, t is time, a is acceleration so that:

y = 0 + 0.5 * (300 m/s^2) * (7 s)^2

y = 7350 m

Answer:

Wavelength

Explanation:

The distance between the crest of one wave and the crest of the next wave is called wavelength of a wave. It is denoted by lambda λ. The maximum displacement of the particle of a wave is called amplitude of wave. The topmost value of displacement of the wave is called crest of a wave while the lowermost value of displacement of the wave is called trough of the wave.

Hence, by finding the distance between the crest of one wave and the crest of the next wave, we can determine the wavelength of a wave.

Colorful light emissions are applicable to everyday life.

Science is the methodical, empirically-based pursuit and application of knowledge and understanding of the natural and social worlds.

People may contribute to the development of new knowledge through science and utilize it to promote their objectives.

Every time matter produces light All materials emit light when heated.

The part of a cooking stove, the metal filaments in a lightbulb, and even solar radiation from the sun creating multicolored lights are just a few examples of how this happens in the world around us.

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The student would take approximately 33.6 minutes to swim 1 km upstream and then 1 km downstream. Comparatively, if the water were still, the round trip would only take about 27.8 minutes.

To calculate the time it takes for the trip upstream and downstream, we must consider the effect of the river's speed on the swimmer's speed.

Upstream: When the student swims upstream, the river speed works against his own speed. Here, we subtract the river's speed from the student's speed: effective speed = 1.20 m/s - 0.500 m/s = 0.700 m/s. The distance he covers is 1.00 km = 1000 m. The time taken going upstream is then t = Distance/Speed = 1000 m / 0.700 m/s = 1428.6 s.

Downstream: When swimming downstream, the river speed aids the student's speed. Now, we add the student's swimming speed to the river's speed: effective speed = 1.20 m/s + 0.500 m/s = 1.70 m/s. With the same distance to cover, the time taken to swim downstream is: t = 1000m / 1.70 m/s = 588.24 s.

In total, the round trip time amounts to: ttotal = 1428.6 s + 588.24 s = 2016.84 s, which is approximately 33.6 minutes.

If the water were still, the student would swim at his own speed both ways: t = 1000 m / 1.20 m/s = 833.33 s each way. So, the total round trip would take: ttotal = 833.33 s × 2 = 1666.66 s, or approximately 27.8 minutes.

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The round trip takes 2017 seconds with the current and 1666 seconds in still water. Swimming upstream and downstream times factor into this calculation.

To determine how long the trip takes for a student swimming upstream and then back downstream, we need to consider both the swimmer’s speed and the speed of the river current.

Swimmer's speed relative to ground = Swimmer's speed in still water - River's speed = 1.20 m/s - 0.50 m/s = 0.70 m/s.

Time taken to swim upstream = Distance / Speed = 1000 m / 0.70 m/s = 1429 s.

Swimmer's speed relative to ground = Swimmer's speed in still water + River's speed = 1.20 m/s + 0.50 m/s = 1.70 m/s.

Time taken to swim downstream = Distance / Speed = 1000 m / 1.70 m/s = 588 s.

Total time for the round trip = Time upstream + Time downstream = 1429 s + 588 s = 2017 s.

If the water were still, the student's speed would be 1.20 m/s in both directions:

Time for one direction in still water = Distance / Speed = 1000 m / 1.20 m/s ≈ 833 s.

Total time for the round trip in still water= 833 s + 833 s = 1666 s.

Therefore, it takes 2017 s to complete the trip with the current, compared to 1666 s without the current.

The question 'How fast does an Australian terrier grow?' could be answered through scientific investigation. This requires data collection and analysis about dog growth rates. Other questions are subjective and lack the objective criteria necessary for scientific studies.

Out of the questions listed, the one that could be answered through scientific investigation is: 'How fast does an Australian terrier grow?' This question involves research and data collection on the growth rates of dogs, specifically Australian terriers. Scientists and veterinarians could conduct studies, measuring the size of these dogs at regular intervals and calculating average growth rates. Information can be analyzed statistically to derive at an answer.

Questions pertaining to dogs' affection, compatibility with cats, or attractiveness to children might not fulfil the objective criteria needed for a scientific investigation. These largely depend on subjective assessments and personal experiences, which could vary greatly among individuals.

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If the temperature at the surface of the earth (at sea level) is 40° Celcius, then the temperature at 2000 meters would be 27.2 degrees Celcius if the normal lapse rate is 6.4° c / 1000 meters.

It is a scale of temperature used to measure the temperature, the kelvin scale of temperature is also known as the absolute scale of temperature.

As given in the problem If the temperature at the surface of the earth (at sea level) is 40° Celcius,

Normal lapse rate =  6.4° c / 1000 meters

The decrease in the temperature for 2000 meter height = 6.4×2

                                                                                               =12.8° Celcius

The temperature at 2000 meters height = 40 - 12.8

                                                                    =27.2° Celcius

Thus, the temperature at 2000 meters would be 27.2 degrees Celcius.

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Final answer:

By applying the normal lapse rate of 6.4°C per 1000 meters, the temperature decrease from 40°C at sea level to 27.2°C at 2000 meters above sea level can be calculated.

Explanation:

The question asks about the change in temperature with altitude, applying the concept of the normal lapse rate. If the temperature at the surface of the earth (at sea level) is 40°C, and considering the normal lapse rate is 6.4°C per 1000 meters, one can calculate the temperature at 2000 meters above sea level. The formula to calculate this is: Temperature at altitude = Surface temperature - (Lapse rate × altitude/1000).

Using the given values in the above formula: 40°C - (6.4°C/1000m × 2000m) = 40°C - 12.8°C = 27.2°C. Therefore, the temperature at 2000 meters above sea level would be 27.2°C.

Some scientists typically think of consciousness as a product of the brain's neural activity, particularly the activity of certain specialized regions of the brain such as the prefrontal cortex.

Consciousness refers to the state of being aware of one's surroundings, thoughts, feelings, and perceptions. It is the subjective experience of being alive and aware of the world around us. Consciousness is often described as the quality or state of being aware of one's thoughts, feelings, and surroundings.

Consciousness can manifest in a variety of ways, including perception, attention, awareness, intentionality, and self-awareness. It is closely tied to our experiences of the world, and plays a central role in our ability to interact with our environment, communicate with others, and make decisions.

Despite its ubiquity in our everyday lives, consciousness is still not fully understood by scientists and philosophers. The study of consciousness is a topic of ongoing research and debate, with many theories attempting to explain how and why consciousness arises in the brain. Some theories suggest that consciousness is an emergent property of complex neural activity, while others propose that it may be a fundamental aspect of the universe itself.

Here in the Question,

Consciousness arises from the coordinated firing of neurons in these regions, which give rise to subjective experiences such as perception, thought, and emotion. Some scientists also believe that consciousness may involve the integration of information across different regions of the brain, as well as the ability to selectively attend to certain stimuli while filtering out others.

While there is still much that is not fully understood about the nature of consciousness, there is a growing body of research that suggests that it is closely tied to brain activity. For example, studies have shown that certain brain regions are more active during conscious states than during unconscious ones, and that the strength of the neural signals in these regions is correlated with the intensity of conscious experience. Other research has suggested that conscious experience may involve the synchronization of neural activity across different brain regions, or the modulation of neural activity by neurotransmitters such as dopamine and serotonin.

Therefore, Some scientists believe that consciousness is a byproduct of neuronal activity in the brain, particularly in some highly specialized areas of the brain like the prefrontal cortex.

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Avg Acceleration is

[tex]\rm 0.4\;m/sec^2[/tex]

Step by Step Solution :

Given :

Final Speed, v = 11.2 m/sec

Initial Speed, u = 9.6 m/sec

Time, t = 4 sec

Calculation :

We know that,

[tex]\rm Avg\;Acceleration = \dfrac{v - u }{t}[/tex]

[tex]\rm Avg \; Acceleration = \dfrac{11.2-9.6}{4}[/tex]

[tex]\rm Avg\;Acceleration =\dfrac{1.6}{4}=0.4 \;m/sec^2[/tex]

Therefore avg acceleration is

[tex]\rm 0.4\;m/sec^2[/tex]

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