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launchSCIENCE
Приєднався 14 вер 2010
PS3 6 Electricity: Internal resistance in a battery WIS
A lab activity to determine the internal resistance of a battery - a D cell. Collecting data from a circuit where different resistors are placed in a circuit containing the D-cell. The voltage is measured through the D cell and the current is measured through the external circuit. Important formulas are using Ohm's law: V = IR and the emf of the cell = Ir +IR where r is the internal resistance of the D-cell and R is the added resistance in the external circuit.
Переглядів: 2
Відео
PS2 2 Two-dimensional collisions WIS IB Physics
Переглядів 714 днів тому
Starting with explaining 1-D collisions, 2-D collisions with pucks on an air table are investigated. The collection of data and its processing are explained including velocity, momentum and kinetic energy calculations before and after collision puck #1 was pushed into an off-center collision with a stationary puck #2.
PS1 2 Bunsen burner flame experiment WIS
Переглядів 116Місяць тому
investigating the Bunsen blue (hot) flame. With CORRUGATED CARDBOARD, popsicle stick and length od wire (straightened paper clip) Demo for teachers only - hazard with fire/flame. Investigating what's happening/not happening the inner blue triangle the Bunsen flame close to the top of the chimney. Care with flame/fire. Do experiment close to a sink. Use goggles. Hold items in tongs. ONLY USE COR...
Decoding Starlight MASS and SPEED of Stars
Переглядів 13 місяці тому
Investigating the spectra shifts that determine the velocity of stars - a red shift if traveling away, and a blue shift if traveling towards Earth Discovering the mass of stars from the luminosity-mass relationship: luminosity, L, is proportional to the 4th port of the mass, M^4. Looking at the mass calculations of binary stars with Sirius, the brightest star in the night sky, as an example Mas...
Decoding Starlight The TEMPERATURE of STARS
Переглядів 153 місяці тому
Investigating the temperatures of different types of stars Looking at the color of stars with different temperatures Investigating a constellation and the color the stars
Decoding Starlight The COLOR of STARS
Переглядів 203 місяці тому
Investigating the color of stars and what information a star's color tells us about the star. First, review how we see color and what color is in terms of the colors of the rainbow from sunlight/visible light. Review the place of visible light in the electromagnetic spectrum and the different Discover what is sunlight -light from our nearest star. Also discover how our eyes see color Looking at...
Decoding Starlight BRIGHTNESS of Stars
Переглядів 153 місяці тому
Investigating stellar brightness. Looking into the three ways to describe brightness - luminosity, apparent magnitude and absolute magnitude. Comparing the faintest objects seen by various observing methods: the naked eye, binoculars, telescopes and terrestrial observatories and space telescopes. Tables of apparent and absolute magnitudes of different stars. Historical development of the appare...
Decoding Starlight BE AN ASTRONOMER
Переглядів 63 місяці тому
Be an astronomer for an evening How to stargaze - and what to look for in the night's sky How to prepare for star gazing by making a star finder - simple instructions to make a planisphere that works in your hemisphere (Northern Hemisphere for the US) How to find constellations How to find the brightest stars How to discover where to find planets, meteor showers, the International Space Station...
Decoding Starlight SPECTRA
Переглядів 145 місяців тому
How spectra of stars can tell us a lot about stars - in particular the elements in stars. Relating atomic structure, and the transitions of electrons between different energy levels, to explain spectra - and how that identifies different elements in stars. Spectra can also indicate the type of star; O B A F G K M stars, whether a star is coming towards us, or noting further away, the temperatur...
Decoding Starlight: WHAT ARE STARS? NASM
Переглядів 215 місяців тому
Discovering the major components in stars: plasma, nuclear reactions, gravity and magnetic fields. There are links to related activities. This video provides a supporting background to understanding the science in Decoding Starlight: the color of stars, absorption and emission spectrum, brightness and nuclear reactions
LS1 3 Osmoregulation activity with veggies WIS
Переглядів 87 місяців тому
Investigating osmoregulation in samples of vegetables. Calculating the percentage mass change due to osmosis when the vegetable samples are placed in different concentration salt, NaCl, solution. Vegetables were cut into similar sized pieces and placed in 5 different concentration salt solution. 1.0 M NaCl solution was diluted into 5 different concentrations - and five different vegetable sampl...
The Earth and Infrared
Переглядів 428 місяців тому
Looking at infrared as a component of sunlight and how what astronauts would feel at the top of the atmosphere in direct sunlight. 52% of sunlight that reaches the Earth's atmosphere is infrared radiation. Infrared as part of the electromagnetic spectrum. What parts of sunlight penetrate the Earth's atmosphere. The Earth's energy budget - gaining energy from solar irradiance and losing energy f...
2024 Partial Solar Eclipse at the Washington International School [ESS1 2 Solar System orbits] WIS
Переглядів 168 місяців тому
What you will see in Washington DC, April 8, 2024, for the partial (89%) solar eclipse. Describing why eclipses occur and the three types of solar eclipses. Looking at then track of totality from Mexico, across the US to Canada. The importance of wearing ISO certified solar eclipse viewing glasses that block 0.003% of sunlight. Also included, links to check your eclipse glasses block enough lig...
PS4 1 Infrared activity #4 TV remote investigation WIS
Переглядів 2411 місяців тому
Investigating infrared in the home: using an infrared TV remote controller to "see" infrared. But you'll need a camera or smartphone that can capture images of infrared - not all cameras will do this. The activity explains how to use an infrared sensitive camera to take a picture of IR rays. A short summary of infrared wavelengths and the different regions of the electromagnetic spectrum is inc...
PS4 3 IR Activity #3 Making infrared goggles WIS
Переглядів 157Рік тому
See objects with infrared radiation. Use theater gel to filter out visible light/sunlight and just leave the infrared rays/heat energy from objects to reach your eyes. The materials needed are not everyday ones and will have to be purchased from online stores: Congo red and Primary blue theatrical light filter gel sheets (~$9) but enough for 4 goggles and welder's goggles (~$7). What colors wil...
PS1 2 Elemental trivia questions - the "chemistree" Periodic Table qs WIS
Переглядів 14Рік тому
PS1 2 Elemental trivia questions - the "chemistree" Periodic Table qs WIS
St Kilda April 2023 - with the Majestic Line
Переглядів 102Рік тому
St Kilda April 2023 - with the Majestic Line
PS4 1 Infrared Activity #1 Making Waves WIS
Переглядів 29Рік тому
PS4 1 Infrared Activity #1 Making Waves WIS
PS4 1 Infrared activity #2 Infrared and rainbows WIS
Переглядів 9Рік тому
PS4 1 Infrared activity #2 Infrared and rainbows WIS
Occupancy of houses with septic systems is more important than you know
Переглядів 5Рік тому
Occupancy of houses with septic systems is more important than you know
PS4 1 Infrared and the electromagnetic spectrum WIS
Переглядів 39Рік тому
PS4 1 Infrared and the electromagnetic spectrum WIS
Bonaire DOLPHINS Carl's Hill dive site, Klein Bonaire
Переглядів 53Рік тому
Bonaire DOLPHINS Carl's Hill dive site, Klein Bonaire
Bonaire underwater 2023 part 3 Klein Bonaire Captain Don's Reef and Carl's Hill dive sites
Переглядів 39Рік тому
Bonaire underwater 2023 part 3 Klein Bonaire Captain Don's Reef and Carl's Hill dive sites
2023 The Jacobite Steam Train a.k.a. Hogwarts Express
Переглядів 140Рік тому
2023 The Jacobite Steam Train a.k.a. Hogwarts Express
Classification Coral Nutrition phylum Cnidaria WIS
Переглядів 25Рік тому
Classification Coral Nutrition phylum Cnidaria WIS
Not gonna lie, I thought this video was going to be about collision handling for the PlayStation 1
How long does it typically take to heat the water +20°C?
Not very long with those alcohol burners--a minute or so (as with burning chips/other dry food--nothing allergic, please--to calculate the kJ in food)
Where should I buy them
My school's gas mantle (with thorium) came with a Cloud Chamber kit as the alpha particle source
Thank you
Could someone please tell me what is the initial and final temperature of the water? It is very hard to tell!
i think the initial is 30 degrees C
i put 30C for intial, 50C for final
one hundred and sixteenth?