How big is space.ppt
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The document discusses the vast distances in space and provides information about the moon, planets, and orbits. It notes that it would take over 162 days to drive to the moon at 60 mph and that light travels to the moon in 1.2 seconds. The document also discusses visualizing the solar system and orbits using tools like Stellarium and Celestia, and having students design travel brochures for planets and describe the end of the Earth by an asteroid.
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The document describes the nine planets of our solar system - Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, Neptune and Pluto. It provides key facts about each planet such as their size, composition, distance from the sun, orbital speed and presence of moons or rings. Venus is described as being very hot due to the greenhouse effect. Earth is noted as unique for supporting life. Mars has polar ice caps and dust storms. Jupiter is the largest planet and has a giant red spot storm. Saturn is known for its rings composed of ice particles.
Solar system a z
The document is a reading passage about the Our Solar System. It provides information about the key components of the solar system including the Sun, eight official planets (Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, Neptune), dwarf planets like Pluto, asteroids, comets and other smaller objects that orbit the Sun. It describes characteristics of each planet such as size, composition, distance from the Sun, rotation, temperature and unique features.
29sept03 notes
This document discusses different types of spacecraft and space missions used to explore the solar system. It describes flyby missions like Voyager that pass by planets to study them without entering orbit. Orbiter spacecraft like Galileo are designed to enter a planet's orbit to study it up close for an extended period. Atmospheric probes and landers allow studying a planet's surface and atmosphere. Future technologies like ion propulsion could enable slower but more fuel efficient missions. Successfully exploring the solar system requires careful planning of spacecraft design, trajectories, and within budget constraints that can exceed $100 million per mission.
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Solar system - a powerpoint presentation by Tanisha Pahwa - 5th
Solar system - a powerpoint presentation by Tanisha Pahwa - 5th
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Chinese new year
The Jade Emperor held a swimming race between animals to determine the order of the zodiac. The rat tricked the cat into falling in the river and leapt onto the ox's head at the finish to come in first, with the ox second. The order of the zodiac was decided based on the animals' placement in the race.
Pressure and moments4
Pressure is defined as the force per unit area applied perpendicular to a surface. It is useful for understanding weight, space travel by knowing safe distances from planets, and measuring blood pressure which is important for health. Pressure can be calculated as force divided by area. Moments are the turning effect of forces on objects with fixed points like hinges or axles, causing them to rotate. Moments are calculated as the force times the distance from the pivot point.
Pressure and moments (3)
Pressure is a type of force measured as the force applied over an area. It can be high, like the pressure from stilettos, or low, like the pressure from dice. Pressure is calculated using the formula of force divided by area. Moments are also a type of force but are not symbolized on the periodic table like pressure. Levers can be used to increase or decrease the magnitude of a force and change the direction of its application through its fulcrum.
Pressure and moments (2)
Pressure is determined by dividing force by the contact area. High pressure results from applying force over a small area, like the narrow heel of a stiletto shoe, while low pressure comes from force spread over a larger area, such as an elephant's wide feet. Pressure and moments formulas can be used to calculate and understand pressure in mechanical systems like levers.
Global warming environment
Fossil fuels like coal, oil and gas take several years to form naturally, whereas solar and wind power are renewable energy sources. Solar power has advantages of being sustainable and environmentally friendly but is currently expensive, while wind power is cheap but produces intermittent energy depending on wind conditions. Solar power installations can be costly.
Alternating current generator
An alternating current generator consists of a rectangular coil that spins within a magnetic field, inducing an electromotive force (EMF) that varies with the cosine of the angle between the coil and magnetic field. Power station alternators have three coil sets spaced 120 degrees apart, each producing an alternating EMF 120 degrees out of phase with the others. The electromagnet at the center spins rather than the coils. A back EMF is induced in a spinning electric motor coil as the flux linkage through it changes, opposing the applied voltage and wasting power through circuit resistance.
Lenzs law presentation f
Lenz's law states that any induced current created by a change in magnetic flux will flow in a direction that opposes the change which created it. This is a consequence of electromagnetic induction and Newton's third law, and is represented by the negative sign in Faraday's law of induction. One example is regenerative braking in hybrid vehicles, where the induced current in the alternator from slowing down the vehicle acts to slow it further through its opposing magnetic field.
Moving charges in a magnetic field
The document discusses how magnetic fields affect the path of electron beams and charged particles. It explains that electrons in a beam experience a force from a magnetic field that causes the beam to follow a circular path perpendicular to the direction of motion and field. It also provides the formula that the force on a charged particle in a magnetic field depends on the magnetic flux density, charge of the particle, and velocity of the particle. Finally, it notes that magnetic fields are used in particle detectors to separate different charged particles based on their charge and measure momentum from curved particle tracks.
powerstations and the environment 2
Fossil fuels like coal, oil and gas take several years to form naturally, whereas solar and wind power are renewable energy sources with some disadvantages. Solar power has advantages of being sustainable and environmentally-friendly but is extremely expensive, while wind power is cheap but produces intermittent energy depending on weather conditions. Solar power installations can be costly.
powerstation 2
This document discusses the consequences of climate change such as melting ice caps flooding, freak weather storms, and colder wetter winters. It also notes that fossil fuels produce CO2 and cannot be reused, and will eventually run out, while renewable energies can be reused, last longer and are more efficient.
powerstation 3
Fossil fuels like coal, gas, and oil release CO2 into the atmosphere and will eventually run out, as they were made millions of years ago underground. Wind and solar power are renewable sources that will not run out, but wind turbines need windy areas and solar panels work best in sunny places like Africa rather than the UK with less sun.
powerstation 3
The document discusses different energy sources such as fossil fuels, wind turbines, and solar panels. Fossil fuels release carbon dioxide into the atmosphere while wind turbines and solar panels do not pollute but have disadvantages of taking up space and not working without wind or sun. The consequences of global warming include wetter winters, warmer summers, melting ice caps which endangers Arctic and Antarctic animals. Individuals can help by recycling, conserving electricity and water, and not wasting energy.
powerstation
Renewable fossil fuels such as paper and water can be burned at power stations to produce electricity in an ongoing cycle and power homes and devices, but this process can pollute the air. The world is warming as we burn fossil fuel reserves and cut down forests, releasing greenhouse gases and thickening the atmosphere to trap more heat in a way that threatens to irreversibly change the world through rapid climate change unlike anything seen before. Urgent action is needed now to avoid a world that will soon be ash.
Planets
The document provides information about the planets in our solar system including Earth, Venus, Mars, Jupiter, Saturn, Uranus, Neptune, and Pluto. For each planet, it lists the number of moons, day length, year length, and an interesting fact. Key details given include Earth having no moons and a 24 hour day, Venus named after the Roman goddess of love, Mars having 2 moons and temperatures varying from 0 to -100 degrees C, and Pluto being cold at -233 degrees C.
planets
Planets are celestial bodies that orbit stars. Our solar system has eight planets that orbit the Sun: Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus and Neptune. These planets vary greatly in size, composition and other properties.
Faradays law
Faraday's law of induction states that the induced electromotive force (emf) in any closed circuit is equal to the time rate of change of the magnetic flux through the circuit. It explains how transformers, inductors, motors and generators work by relating the induced emf to the changing magnetic flux. The law combines with Lenz's law, which describes the direction of induced current. Specifically, the induced emf is equal to the product of the magnetic field strength, length of the coil, and its velocity of removal from the field.
Electron beams
The document discusses electron beams and how they can be deflected using magnetic fields. It explains that a force acts on a current-carrying wire placed in a magnetic field according to the equation F = BIL, where B is the magnetic field, I is the current, and L is the length of the wire. It also discusses how electron beams are produced through thermionic emission and can be controlled by applying magnetic fields, causing them to move in circles, spirals, or helices depending on the field orientation. Finally, it mentions researching deflecting electron beams for uses in technology from the 20th century such as television picture tubes, oscilloscopes, and x-ray tubes.
Particles moving in a circular path
This document discusses the motion of charged particles in a magnetic field. It introduces the formula for the magnetic force (F=BQv) and explains that charged particles will travel in a circular path when subjected to a perpendicular magnetic field. Examples are given of devices that use this principle, including cyclotrons which accelerate charged particles in a spiral path for medical applications like cancer treatment, and mass spectrometers which separate particles based on their different radii of curvature in a magnetic field.
Magnets1
The document discusses magnetism and magnetic fields. It begins by asking questions about magnetic properties and then outlines topics to be covered, including the definition of tesla as a unit of magnetic flux density. It explains that electron spin causes magnetism and describes magnetic field lines and poles. It also discusses Fleming's left hand rule and how the force on a current-carrying wire in a magnetic field is determined by F=BIL, where B is magnetic flux density, I is current, and L is wire length. Examples are provided to calculate magnetic field strength from measured force.
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How big is space.ppt
- 1. How big is space? How far away is it all?
- 3. If you could drive straight up in a car at 60 miles per hour; How long would it take to get to the moon?
- 5. How far are the other planets http://janus.astro.umd.edu/astro/distance/ Lets try and get some perspective on the rest of the universe
- 6. Stellarium What can we see from Earth? The best way to learn about space is to look into the sky
- 7. Celestia The planet tour
- 8. Design a travel brochure for your planet Really sell the features of your planet to try and get as many holiday makers as possible Dazzling pictures exciting adventures
- 9. What do orbits look like Planets and asteroid and comets http://neo.jpl.nasa.gov/orbits/ Deep impact http://janus.astro.umd.edu/AW/awtools.html#orbits
- 10. What are the chance of being struck by a meteor/ comet Watch the end of deep impact Write a description of the end of the Earth by asteroid