#28: Describe/explain three different types of waves regularly used by humans.
If I remember correctly, it was radio waves, microwaves, and visible light.
We use radio waves, like when your sitting in the car, and you turn on the radio for some music, or broadcast you wanna listen you.
We use microwaves, to cook our food faster.
We use visible light, so we can see things around us. Any other wave would be to dangerous for us.
Use the map to compare the locations of points X and Y. Point X is Florida.
Which of the following compares the temperature range of points X and Y?
Point X has a larger temperature range throughout the year because it is coastal.
Point X has a larger temperature range throughout the year because it is inland.
Point X has a smaller temperature range throughout the year because it is coastal.
Point X has a smaller temperature range throughout the year because it is inland.
Mark this and return
Answer:
A
Explanation:
Kristina demonstrates a toy for her younger brother. The steps to operate the toy are listed below. Step 1. Push the toy down. Step 2. A spring compresses. Step 3. Release the toy. Step 4. The toy jumps into the air. Which best describes Step 4?
Answer:
A/ Elastic potential energy changes to gravitational potential energy
Explanation:
just took the test
Answer:
a
Explanation:
i got it right on edg
Jack pushed and pushed, but no matter how hard he tried, the refrigerator would not budge! What is the BEST explanation of what happened? A) Jack exerted a force and did work. B) Jack had no energy and did no work. C) Jack used all his potential energy to do work. D) The refrigerator did not move so no work was done.
Answer:
D) The refrigerator did not move so no work was done.
Explanation:
The refrigerator did not move so no work was done. Jack did exert a force and he did have energy. His muscles were twitching and using stored chemical energy. No work is done, though, if the force or energy does not cause an object to move. No movement, no work.
Explain the difference between strength,muscular endurance and power
The difference between strength, muscular endurance, and power include:
Strength simply means the ability of a muscle to be able to generate force against resistance. On the other hand, power simply means a large amount of force that can be generated quickly. Muscular endurance simply means the ability of muscles to be able to exert force against a particular thing for a period of time.Strength has to do with one repetition while power has to do with several repetitions. Muscular endurance involves constant repetition.It should be noted that power, strength, and muscular endurance are forms of muscular ability.
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The unique mixture of qualities that distinguish you from other is known as your
a) personality
b) assertiveness
c) resiliency
d) self-esteem
Answer: i think its too late for answer but thx for points really needed
Did the bird population appear to benefit from the elimination of the rattlesnakes
The bird population often benefits from the removal of predators, as seen with the decrease in bird species due to introduced predators like the brown tree snake in Guam. However, ecosystem dynamics can be complex, and the overall impact of predator elimination can vary.
Explanation:Based on the information provided, the bird population does seem to benefit from the elimination of predators such as rattlesnakes. For instance, in habitats where predatory snakes were introduced, such as the brown tree snake in Guam, there were significant declines in native bird populations. This indicates that predators can have a drastic effect on bird populations. Without the presence of such predators, bird species that were previously preyed upon could potentially recover in numbers.
The example given of the Yellow-billed Cuckoo shows that bird nesting preferences, and indirectly population health, can be influenced by habitat quality. A healthier habitat without the stress of predation can lead to increased bird populations. However, each ecosystem is unique, and the role of predators can be complex. In some cases, predators can control populations of species that might otherwise explode in numbers and disrupt the balance of the ecosystem, so the benefit to bird populations upon the removal of a predator can vary.
In summary, while the elimination of a predatory species like rattlesnakes can lead to the recovery of certain bird populations, the overall effect in an ecosystem may be complex and is dependent on numerous factors including habitat health, availability of food sources, and absence of other predators or stressors.
Summarize the history of radioactivity by choosing the scientist(s) involved with each discovery. conducted experiments with uranium-containing minerals and pure uranium. came up with the term “radioactivity.” showed that uranium in a mineral gave off radiation even without being exposed to the Sun. discovered radium and polonium. conducted experiments with fluorescent minerals and photographic plates.
Marie and Pierre Curie - conducted experiments with uranium-containing minerals and pure uranium.
Marie and Pierre Curie - came up with the term “radioactivity.”
Antoine Henri Becquerel- showed that uranium in a mineral gave off radiation even without being exposed to the Sun.
Marie and Pierre Curie - discovered radium and polonium.
Antoine Henri Becquerel- conducted experiments with fluorescent minerals and photographic plates.
Answer:
✔ Marie and Pierre Curie
✔ Marie and Pierre Curie
✔ Antoine Henri Becquerel
✔ Marie and Pierre Curie
✔ Antoine Henri Becquerel
Not all energy sources derive their energy from the sun. Choose the three from the list below that derive their energy from sources other than the sun.
chemical
heat
light
geothermal
nuclear
tidal
Answer:
Chemical
Nuclear
Geothermal
Explanation:
The source of all magnetism is. A. tiny pieces of iron. B. tiny domains of aligned atoms. C. Ferromagnetic materials. D. moving electric charge. E. None above
The source of all magnetism is fundamentally from moving electric charges, which in more complex and observable form, manifests as atomic dipoles aligned into domains in ferromagnetic materials, such as iron.
Explanation:The source of all magnetism lies within moving electric charges, which is in option D. This is primarily seen in the form of electrons in atomic orbits. However, the more complex and commonly observed form of magnetism comes from atoms in ferromagnetic materials like iron, which forms domains of aligned atoms, or option B. These domains act like tiny bar magnets and are rigidly aligned in the same direction due to strong coupling effects, giving each domain a net dipole moment. When these domains align under an external magnetic field, we observe what we commonly perceive as magnetism.
Though iron and other ferromagnetic materials like nickel are often associated with magnets, they are not the source of magnetism, but rather mediums that exhibit magnetic properties when their atomic dipoles are aligned in domains. The real source is the moving electrical charges within the atoms of these materials, specifically their electrons.
So to summarize, the source of magnetism is fundamentally from moving electric charges. However, this source manifests in a more organized and observable form when the atoms of ferromagnetic materials form domains of aligned atomic dipoles.
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The source of all magnetism is moving electric charges. Ferromagnetic materials like iron exhibit this effect, where domains of atoms with aligned magnetic fields make each atom a tiny magnet. The alignment of these domains causes magnetization.
The source of all magnetism is D. moving electric charge. This is because magnetism at its most fundamental level arises from electric currents. In ferromagnetic materials such as iron, magnetism is caused by regions called domains where the electrons' magnetic fields are aligned with each other. Within these domains, the magnetic moments of individual atoms are oriented in the same direction, with each atom acting as a tiny bar magnet. When these domains are aligned in the presence of an external magnetic field, the object becomes magnetized. The process of alignment involves domains growing and orienting themselves, which can become permanent when the material is heated and then cooled, or simply tapped in the presence of magnets.
The atomic nucleus contains two subatomic particles, the proton and the neutron. Atoms of different elements have different numbers of protons and neutrons. The nuclei of atoms that are the most stable have proton to neutron ratios of:
A) 1 to 1
B) 2 to 1
C) 1 to 2
D) there is no pattern that indicates stability in the nucleus
the correct answer is the letter A)1 to 1
The nuclei of atoms that are the most stable have proton to neutron ratios of 1:1. Thus, the correct option for this question is A.
What is the nucleus of an atom?The nucleus of an atom may be defined as the center of any atom that significantly consists of protons and neutrons. Due to the positive charge on protons and neutral charge on neutrons, the nucleus of an atom is found to be positively charged.
In the structure of any atom, the number of protons and neutrons in the nucleus of an atom remains equal most of the time.
But when it comes to isotopes, when atoms of different elements have the same atomic number but different mass number, the number of neutrons significantly changes.
Therefore, the nuclei of atoms that are the most stable have proton to neutron ratios of 1:1. Thus, the correct option for this question is A.
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In order to get the bike to move and stay moving, what friction must be overcome
Friction is the resistance offered against the motion of one surface over the other. This is because, at the microscopic level, each surface has hills and valleys i.e. the surfaces are not completely smooth and hence the roughness of one surface locks over the other and restricts its motion. There are two kinds of friction: static friction and kinetic friction. When the object is at rest, static friction acts. While the object is in motion, kinetic friction acts. Static friction is greater than the kinetic friction because a larger force is required to change the state of rest to motion. You must have experienced that if you do not accelerate the bike while its in motion, it would slow down and eventually stop. In order to get the bike moving, initially static friction must be overcome and thereafter, kinetic friction to make it stay in motion.
TP-14 Which of the following is a sign that the weather may change for the worse?
A sudden drop in the temperature is a sign that the weather may change for the worse for the temperature balance become vulnerable, it may cause strong storm. This change is due to the change in air, water and the resulting pressure gradients that stimulate the movement of air masses.
A sudden drop in the temperature is a sign that the weather may change for the worse. Long-term changes in temperature are referred to as weather patterns.
What is a weather change?
Long-term changes in temperature and weather patterns are referred to as weather changes. These movements might be due to natural causes, such as oscillations in the solar cycle.
An oncoming cold front is signaled by a reduction in air pressure and temperature. Severe weather, such as heavy rain, hail, destructive wind gusts, lightning, and even tornadoes, are caused by these fronts.
A sharp decrease in temperature indicates that the weather is about to shift for the worse, putting the temperature balance at risk and may be resulting in a violent storm.
This shift is caused by changes in the air, water, and the pressure gradients that follow, which encourage the movement of air masses.
Hence the sudden drop in the temperature is a sign that the weather may change for the worse.
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1) With your pneumatic system, how do you think your results would have been affected if there had been a leak in the tubing?
2) Given your observations for this investigation, would you rather ha a hydraulic braking system Or a pneumatic braking system in your car. Explain.
A leak in the tubing of a pneumatic system would decrease its efficiency. A hydraulic braking system would be preferred for a car.
Explanation:If there had been a leak in the tubing of a pneumatic system, the results would have been affected. A pneumatic system uses compressed air to transmit force, and if there is a leak, a decrease in pressure would occur. This would result in a decrease in the efficiency of the system, as the force applied may not be transmitted properly.
Based on the observations and the information provided, it is likely that a hydraulic braking system would be preferred for a car. A hydraulic system, like the one used in hydraulic brakes, utilizes an incompressible liquid to transmit force. This ensures that the force is transmitted efficiently without any loss due to compression or leaks.
A circuit is made of 0.4 ohm wire, 150 ohm bulb and a 120ohm rheo stat connected inseries. Determine the total resistance of the resistance of the circuit?
The answer is: [tex]270.4 \, \Omega.[/tex]
The total resistance of the circuit is given by the sum of the individual resistances since they are connected in series. The resistance values are 0.4 ohms for the wire, 150 ohms for the bulb, and 120 ohms for the rheostat. Therefore, the total resistance [tex]\( R_{total} \)[/tex] is calculated as follows:
[tex]\[ R_{total} = R_{wire} + R_{bulb} + R_{rheostat} \][/tex]
[tex]\[ R_{total} = 0.4 \, \Omega + 150 \, \Omega + 120 \, \Omega \][/tex]
[tex]\[ R_{total} = 270.4 \, \Omega \][/tex]
So, the total resistance of the circuit is [tex]\( \boxed{270.4 \, \Omega} \)[/tex].
The answer is: [tex]270.4 \, \Omega.[/tex]
Another term for position of an object is_____.
In physics, another term for the position of an object is 'displacement'. Displacement refers to the change in position of an object in relation to a reference frame, and specifies the direction of movement.
Explanation:In the field of physics, another term for the position of an object is displacement. Displacement refers to the change in position of an object in relation to a reference frame. For instance, if an object moves to the right relative to a whiteboard, its position, or displacement, changes.
To illustrate, imagine an airplane in motion. To describe the position of a passenger in the airplane, you would use the airplane, not Earth, as the reference frame. Therefore, the passenger's displacement could be toward the rear or front of the airplane.
The key point to remember is that displacement not only refers to the change in position, but also specifies the direction of the movement. It's therefore considered a vector, and can be either positive or negative, depending on the chosen positive direction.
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True or False: Bioamplification is when toxin levels get higher in each trophic level.
Explain:
Bioaccumulation is the process by which toxins enter the food web by building up in individual organisms.
Which of the following is Not likely to put someone at risk for becoming involved in a unsafe online relationship?
A.Feeling lonely or misunderstood
B.being truthful and honest with his or her parents
C.feeling overwhelmed by personal problems
D.Having low-esteem
The action that is not most likely to put someone at risk of becoming involved in an unsafe online relationship is being truthful and honest with his or her parents. Thus, the correct option for this question is B.
What is an Online relationship?An Online relationship may be defined as a type of relationship that is significantly built between two people who met online with the help of the internet. So, this type of relationship is also known as the internet relationship.
This type of relationship is practically unsafe because you never see a person in real life wanting to become friends through the internet without knowing the actual emotions, and feelings of each person. And people usually initiate to share their feelings, and ideology that puts them in danger or threat.
Therefore, being truthful and honest with his or her parents is the statement that is not most likely o put someone at risk of becoming involved in an unsafe online relationship. Thus, the correct option for this question is B.
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Which of the following characterizes Erik Erikson's identity versus role confusion stage?
For ape x it is a 16-year-old freshman who can't decide if she wants to dress preppy or goth
What can electromagnetic waves travel through?
which of the following objects is in equilibrium : an object that moves at constant acceleration,an object that moves at constant velocity
Answer:
An object that moves at constant velocity
Explanation:
For an object to be in equilibrium, according to Newton's first law, the object must maintain its state of rest or movement without a resulting force acting on the object.
In this case the object in both options is in motion, but the only one in which that movement is constant and without resulting forces is when it moves at constant speed, so it is in equilibrium.
On the other hand, when it moves with at constant acceleration, by Newton's second law [tex]F = ma[/tex] ([tex]m[/tex] is the mass and [tex]a[/tex] is acceleration), if there is an acceleration there will be a resultant force so the object is not in equilibrium.
The answer is an object that moves at constant velocity is in equilibrium.
Sally was trying to calculate the speed of the hummingbirds feeding outside her window. Sally measured the distance from one feeder to the next, 24 meters. Then she sat and timed how long it took a hummingbird to fly from one feeder to the next. She timed 10 trials and calculated the average time, 3 seconds. What was the average speed of the hummingbird flying from one feeder to the other?
Answser: 8 m/s
Explanation:
Sally performed an experiment, in which she handled two variables:
The distance is fixed, so she only measured it one time and it was 24m.
She timed 10 trials and calculated the average time of 3 seconds. So, you will use this time fo calculate the average speed of the hummingbird flying from one feeder to the other, using the formula:
Hence, the result is 8 m/s.
Answer:8 m/s
Explanation:8 m/s
Which of the following is not an interaction between ecosystems? A. Competition. B. Mutualism. C. Equilibrium. D. predation
The one that is not an interaction between an ecosystem is equilibrium. The correct option is C.
What is an ecosystem?An ecosystem is comprised up of all the organisms and the physical environment in which they reside.
These biotic as well as abiotic elements are connected by nutrient cycles along with energy flows.
Photosynthesis introduces energy into the system, which is then incorporated basically into plant tissue.
Every living forms, encompassing humans, is a part of all these complex networks of interdependent relationships referred to as ecosystems.
A neat and healthy ecosystems clean the water, aids in the air purification , keep the soil in healthy condition, regulate the climate, recycle nutrients, and helps us with certain food.
Predation, parasitism, as well as herbivory are the four chief sorts of species interactions that takes place among organisms in an ecosystem.
In these interactions, one organism benefits while the other gets harmed. Competition encompasses both organisms that are harmed in some way as a result of their interactions.
Thus, the correct option is C as equilibrium is not basically interaction between ecosystem.
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The rms current output in a circuit is 7.75 A. What is the maximum current?
A capacitor is connected to a power source and begins charging. What causes the capacitor to stop charging while it is still connected to the power source?
A capacitor stops charging when the voltage across it equals the emf of the power source. The voltage and charge on the plates of the capacitor and the presence of an inductor play major roles in this process.
Explanation:A capacitor, when connected to a power source, begins to charge up. This charging continues until the voltage across the capacitor equals the emf (electromotive force) of the power source. The reason for the capacitor stopping its charge is due to the opposing force of the charges on its own plates, as per the Kirchhoff's loop rule in physics. This rule states that the algebraic sum of potential changes around any closed loop in a circuit should be zero.
Another factor involved is Ohm's law for a capacitor. When the capacitor is fully charged, it effectively acts as a form of AC resistance, limiting the current flow. Once the capacitor is fully charged, it halts current flow, reaching its maximum voltage, which equals the voltage of the power source.
Aside from these, the inductor plays a role when a capacitor is in a circuit. The inductor resists a change in current, allowing current to flow even when the capacitor is fully charged. This creates a cycle where energy is transferred back and forth between the capacitor and the inductor.
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Find vilocity of sound in a gas when the 2 waves of wavelenth 0.8 and 0.81 metre produce 4 beat per second
Suppose you increase your walking speed from 7 m/s to 15 m/s in a period of 2 s. What is your acceleration
A diagram of the carbon-oxygen cycle is shown below.
Which of the following is mainly responsible for the removal of carbon dioxide from the atmosphere?
Question 23 options:
animals
factories
soil
plants
NEED IT ASAP
AND BRAINIEST
Plants are mainly responsible for the removal of carbon dioxide from the atmosphere.
How does plants help in reducing the atmospheric CO2?During photosynthesis, plants take in carbon dioxide (CO2) and water (H2O) from the air and soil. Within the plant cell, the water is oxidized, while the carbon dioxide is reduced. This transforms the water into oxygen and the carbon dioxide into glucose.What is photosynthesis?It is the process by which plants uses sunlight as energy to convert carbon dioxide and water into oxygen and energy in the form of glucose .Thus , plants uses CO2 to form it's food and are responsible for the removal of carbon dioxide from the atmosphere.
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problems with solar energy include
The problems with solar energy include its intermittency and the high upfront cost of battery storage systems. The production of photovoltaic cells generates hazardous waste, and deployment of large-scale solar systems can harm undeveloped habitats. Also, solar energy cannot directly power all sectors like cars and airplanes due to its diffuse nature.
Explanation:There are a number of challenges and problems associated with the use of solar energy. Some primary issues include its intermittency, as solar energy capture is not constant, and can be particularly low during the nighttime or in seasons with less sunshine. This inconsistency can be offset by battery storage, but such storage solutions add substantial cost, need regular maintenance, and require the environmentally unfriendly process of battery replacement.
Another concern is the environmental impact of photovoltaic (PV) cells, the main technology for generating solar energy. The process of manufacturing PV cells requires the use of chemicals and solvents, generating some hazardous waste. Besides, the deployment of large-scale solar arrays in undeveloped areas or fragile ecosystems like deserts can cause habitat destruction. Solar thermal systems, another form of solar energy, also pose problems as they use potentially hazardous fluids for heat transfer and need significant amounts of water for cleaning and cooling.
Finally, solar energy can't directly power some sectors and applications such as cars and airplanes due to its diffuse nature, making it not entirely substitutable with other energy sources. While the sun provides an abundant source of energy, transitioning to a solar-powered society poses significant challenges.
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In which type of transistor does current flow from the base to the emitter?
A. An NPN transistor, which has a p type base
B. An NPN
Answer:
The current flows from the base to the emitter in the NPN transistor.
Explanation:
NPN transistor :
NPN transistor is a semiconductor in which the positively charged is sandwiched between two negatively charged.
In NPN transistor, [tex]V_{CB}[/tex] is reverse-biases the collector-base junction and [tex]V_{BE}[/tex] is forward- biases the emitter-base junction.
Hence, The current flows from the base to the emitter in the NPN transistor.
Answer:
A. an NPN transistor, which has a p-type base
Explanation:
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