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Energy
The Energy category covers the description, definition, and use of all types of energy. Questions of a general nature can be put in the general Energy category. Other sub-categories exist for Fossil fuels, Nuclear energy, and renewables such as Wind, Solar, Hydro, Tidal, and Wave power.
24,905 Questions
Do pineapples create electricity?
Pineapples do not naturally produce electricity. However, some scientists have experimented with using the fruit's acidic juice as a conductor in simple battery models due to its citric acid content.
Why is the wind vane important?
A wind vane is important because it helps determine the direction from which the wind is blowing. This information is crucial for various applications like predicting weather patterns, optimizing wind energy production, and ensuring safe aircraft take-offs and landings.
Struggle that occurs between organisms for food water and energy when resources are limited?
This struggle is known as competition. Organisms must compete with one another for resources such as food, water, and energy when these resources are limited. The competition can be intense and can drive organisms to develop adaptations and strategies to outcompete others for survival.
What does the amount of kenetic energy that a moving object has depend on?
The kinetic energy of a moving object depends on its mass and its velocity. The formula for kinetic energy is 0.5 x mass x velocity^2. This means that both increasing the mass or the velocity of the object will increase its kinetic energy.
The distance a book is from the floor can be calculated using the formula for gravitational potential energy: PE = mgh, where PE is potential energy, m is mass, g is acceleration due to gravity, and h is height. Given that the potential energy (PE) is 98 J, mass (m) is 10 kg, and acceleration due to gravity (g) is 9.8 m/s^2, you can solve for h to find the height the book is from the floor.
How is Earth's surface heated?
The Earth's surface is heated by the Sun's energy. Sunlight contains electromagnetic radiation, which warms the Earth when it is absorbed by the land, oceans, and atmosphere. This energy is then radiated back into the atmosphere, contributing to the Earth's overall temperature.
Can you harvest supernovae energy?
Currently, we do not have the technology to directly harvest energy from supernovae. Supernovae release an immense amount of energy in a short period of time, but they are so far away and the energy is dispersed over a large area, making it impractical to capture. Additionally, the energy released in a supernova is on a scale far beyond our current capabilities to harness.
What does the amount of energy in the atmosphere depend on?
The amount of energy in the atmosphere depends on factors such as incoming solar radiation, the Earth's surface temperature, greenhouse gas concentrations, and atmospheric circulation patterns. This energy drives weather systems and influences climate patterns globally.
Why do we need alternative energy to fossil fuels?
Fossil fuels (coal, oil and natural gas) are damaging our environment with greenhouse gases. We need to get renewable energy (solar, wind, water, hydro, tidal and wave, geothermal, ocean thermal, biomass, biofuel and hydrogen) working everywhere so we can stop burning coal and oil.
Fossil fuels are not renewable. There is only a limited supply. We need to keep fossil oil for making plastic, a really useful invention.
Living things breathe to take in oxygen from the atmosphere and release carbon dioxide as a waste product. This process, known as respiration, is essential for generating energy through the breakdown of food molecules. Different organisms have evolved different respiratory structures and mechanisms to suit their lifestyle and environment.
What does harness means referring to energy?
It means to convert the energy to a form that is useful for humans - for making machines work, for example. Or simply, convert to a form of energy that is easily converted to other forms of energy, for example, AC electricity, at an appropriate voltage.
What is a changing electric current that carries information is called a?
A changing electric current that carries information is called a signal. This signal can be in the form of varying voltage levels or frequencies that can represent data or enable communication between electronic devices.
What is the molecular motion of solid?
The primary motion in solids is very small amplitude vibrations of atoms around their equilibrium positions. The amplitude of the vibrations increases with increasing temperature up to the melting point of the solid, at which the solid becomes liquid and far more spatial motion is possible for the molecules.
Can an umbrella get hit by lightning?
While it is possible for an umbrella to get hit by lightning due to its metal frame, the likelihood is low compared to taller objects like trees or buildings. It is generally safe to use an umbrella during a thunderstorm, but it is recommended to seek shelter indoors to avoid any risk of being struck by lightning.
What are the advantages and disadvantages of geothermal energy?
Primarily, the earth generates internal heat by radioactive decay, which continuously rises and radiates from the surface. Harvesting this geothermal energy involves pumping water down a drilled shaft, deep into the earth where it collects heat, creating steam. The steam is then directed upward through another shaft to turbines that generate electricity. The recovered water, now cooled, is again pumped down the original shaft in a continuing cycle.
Advantages:
- Cleaner: energy source than fossil fuels.
- Base-load: energy source.
- Safer: to develop and use, than fossil fuels.
- Conserves: fossil fuels, still required in some applications,
- Contributes to diversity: of energy sources.
- Independent: of weather
Disadvantages:
Not universally available.
Emissions:
- 0 - 88 lbs of CO2 per megawatt-hour (comparatively negligible);
- trace amounts of mercury, boron, arsenic, antimony, etc.
- Localized Depletion:In 3 oldest sites, use outruns energy renewal.
- Geological instability: Basel, Switzerland operation suspended (10,000 seismic events/6 days).
- Hazard: exploration entails significant risks.
- 20% failure rate: with significant harm to environment.
Drilling and exploration.
Corrosion maintenance can out-weigh benefit.
How are the water cycle and the energy transfer related?
The water cycle relies on energy from the sun to power processes like evaporation and transpiration, which move water through the cycle. Energy from the sun is absorbed by Earth's surface, causing water to evaporate from oceans, lakes, and land. This evaporation is a key driver of the water cycle, ultimately leading to processes like precipitation and runoff.
Where does earth get its energy?
Solar energy is the source of almost all other energy on earth with the exception of nuclear energy in power plants.
Solar energy
- drives all the photosynthesis on earth. This in turn creates sugars and starches used by animals as an energy source.
- provides heat to the atmosphere and the land. In addition to heat this provides power for winds which can be used sail boats and in wind power systems.
- drives the hydrogeological cycle which establishes water reservoirs at heights which can be tapped for hydroelectric power
What are the affects of modern gadgets?
Modern gadgets can have both positive and negative effects on individuals. On the positive side, they can increase productivity, efficiency, and connectivity. However, they can also lead to addiction, distraction, and negative impacts on mental and physical health if not used in moderation.
What is the basis of all living things?
The basis of all living things is cells. Cells are the smallest unit of life that can perform all the necessary functions for an organism to survive. They make up the structure of living organisms and carry out essential processes like metabolism, growth, and reproduction.
Is it true that slow-moving objects have more kinetic energy then fast moving objects?
Faster particles have more energy than slower particles, yes.
What happens to the temperature of boiling water if you turn up the heat on the stove?
The boiling point of water is 100 degrees celsius. The water will evaporate at boiling point. By the way what do you mean "what happens to the temperature of boiling water" if you think about it, it does not make sense.
How do organisms differ from non-living things?
Organisms are living and exhibit characteristics such as growth, reproduction, and response to stimuli. They are made up of cells, undergo metabolism, and have the ability to evolve. Non-living things do not possess these attributes and are not capable of self-replication or adaption to the environment.
A focus scale is a numerical scale typically found on camera lenses that indicates the distance at which the lens is focused. It helps photographers set the correct focus distance when manually adjusting the focus on their lens. This can be particularly useful in situations where precise focus is crucial.
Yes, some minerals can be dangerous if consumed in large quantities or in certain forms. For example, exposure to high levels of lead, mercury, or arsenic can be toxic to the human body. It is important to be aware of recommended daily allowances and potential hazards associated with certain minerals.
