Search Constraints
Number of results to display per page
Results for:
Language
English
Remove constraint Language: English
Resource Type
Video
Remove constraint Resource Type: Video
Search Results
-
Video
In 46 episodes, Phil Plait (aka The Bad Astronomer) teaches you astronomy! This course starts with the astronomical observations we can make with the naked eye and expands out to cover the solar system, stars, galaxies, and the universe itself. The content is loosely based on an introductory university-level curriculum. By the end of this course, you will be able to: * Define the components of the universe, from the planets in the Solar System to dark energy and gamma rays * Understand how astronomers collect and analyze data to study the past and current state of the universe * Explain the difference between asteroids, comets, and meteors * Contextualize observed phenomena within scientific theories about the history and physics of space, such as the Big Bang theory
- Subjects:
- Cosmology and Astronomy
- Keywords:
- Astronomy
- Resource Type:
- Video
-
Video
In 46 episodes, Dr. Shini Somara will help you find your place in the world -- literally! -- with physics. This course is based on introductory college-level material and the 2016 AP Physics I and II curriculum. By the end of this course, you will be able to: *Identify the fundamental forces describing the world and the core branches of physics *Pose, refine, and evaluate scientific questions *Connect phenomena and models across spatial and temporal scales *Use representations and models to communicate scientific phenomena and solve scientific problems *Apply mathematical equations that describe natural phenomena
-
Video
Comparing initial rates to determine the order of reaction is a very common question in Kinetics.
Let's take a look at an example:
The objective is to choose a pair of experiments for comparison where the concentration of a reactant changes and ideally the concentration of other reactants remain constant. This means that any change in the initial rates of the experiments must be due to the change in the concentration of that reactant, and we can figure out the order from there.
1. Order of Reaction with respect to HCl
Comparing experiments 1 and 3, concentration of HCl doubles and there is no change in concentration of sucrose. So the change in initial rates must be due to HCl only. We can work out the change in initial rates to be 2 times. This means when concentration of HCl doubles, initial rate doubles. Therefore order of the reaction with respect to HCl will be order 1. For comparison, if order of reaction is zero, initial rate will remain unchanged when concentration of HCl doubles. If order of reaction is 2, initial rate will increase by 4 times (2^2 times) when concentration of HCl doubles. Since we only have 3 possible orders to consider, figuring out the order of reaction is quite straightforward.
2. Order of Reaction with respect to sucrose
Comparing experiments 1 and 2, concentration of sucrose increase by 1.5 times and there is no change in concentration of HCl. So the increase in initial rates by 1.5 times must be due to sucrose only. Since this is a proportionate increase, order of reaction with respect to sucrose is also order 1. Finally we can write out the rate equation for this reaction to be: rate = k [HCl][sucrose]
- Course related:
- ABCT 2701 Analytical Chemistry
- Subjects:
- Chemistry
- Keywords:
- Chemistry Physical theoretical
- Resource Type:
- Video
-
Video
We're going to take apart a plastic anatomy model and see what we can find in the abdomen. We'll identify as many organs as we can, see how they fit into the abdomen relative to one another, working our way from anterior to posterior.
- Course related:
- HTI17102 Imaging Anatomy
- Subjects:
- Health Sciences and Biology
- Keywords:
- Organs (Anatomy) Abdomen
- Resource Type:
- Video
-
Video
Uniform circular motion, Coulomb's Law and angular momentum quantization are used to derive an expression for the radius in the Bohr Model.
- Course related:
- AP20015 Physics in Radiological Science
- Subjects:
- Physics
- Keywords:
- Quantum theory
- Resource Type:
- Video
-
Video
The concepts behind linear regression, fitting a line to data with least squares and R-squared, are pretty darn simple, so let's get down to it
- Course related:
- BRE366 Analytical Skills and Methods (Quantitative Research Methods)
- Subjects:
- Mathematics and Statistics
- Keywords:
- Regression analysis R (Computer program language)
- Resource Type:
- Video
-
Video
You stick cookie dough into an oven, and magically, you get a plate of warm, gooey cookies. Except it's not magic; it's science. Stephanie Warren explains via basic chemistry principles how the dough spreads out, at what temperature we can kill salmonella, and why that intoxicating smell wafting from your oven indicates that the cookies are ready for eating.
- Subjects:
- Chemistry and Food Science
- Keywords:
- Food -- Composition Food -- Analysis
- Resource Type:
- Video
-
Video
Ever wondered how your smartphone works? Take a journey down to the atomic level with scientist Cathy Mulzer, who reveals how almost every component of our high-powered devices exists thanks to chemists -- and not the Silicon Valley entrepreneurs that come to most people's minds. As she puts it: "Chemistry is the hero of electronic communications."
- Subjects:
- Chemistry
- Keywords:
- Photolithography Chemistry Smartphones Telecommunication
- Resource Type:
- Video
-
Video
Speaking one month after the massive Gulf of Mexico oil spill, Lisa Margonelli shows how drilling moratoriums and executive ousters make for good theater, but distract us from the issue at heart: our unrestrained oil consumption. She shares her bold plan to wean America off oil -- by confronting consumers with its real cost.
- Subjects:
- Environmental Sciences
- Keywords:
- Fossil fuels -- Environmental aspects Petroleum industry trade -- Political aspects Petroleum
- Resource Type:
- Video
-
Video
As we keep pumping carbon dioxide into the atmosphere, more of it is dissolving in the oceans, leading to drastic changes in the water's chemistry. Triona McGrath researches this process, known as ocean acidification, and in this talk she takes us for a dive into an oceanographer's world. Learn more about how the "evil twin of climate change" is impacting the ocean -- and the life that depends on it.
- Subjects:
- Environmental Sciences and Chemistry
- Keywords:
- Marine pollution Oceanography
- Resource Type:
- Video
-
Video
Jakob Magolan is here to change your perception of organic chemistry. In an accessible talk packed with striking graphics, he teaches us the basics while breaking the stereotype that organic chemistry is something to be afraid of.
- Subjects:
- Chemistry
- Keywords:
- Chemistry Organic
- Resource Type:
- Video
-
Video
Learners read about lab equipment and basic safety measures. In a quiz, they view photos and determine if the lab technicians pictured are using safe practices.
- Subjects:
- Laboratory Techniques and Safety and Chemistry
- Keywords:
- Chemical laboratories Chemical laboratories -- Technique
- Resource Type:
- Video
-
Video
In this animated and interactive object, learners observe how two, three, or four groups of electrons around the central atom cause the shape of the molecule to be linear, trigonal planar, bent, tetrahedral, or pyramidal. Seven examples and eight interactive questions are provided.
-
Video
In this screencast, we review the positions of metals, metalloids, and nonmetals in the Periodic Table and the general characteristics of each.
- Subjects:
- Chemistry
- Keywords:
- Periodic table of the elements Chemical elements
- Resource Type:
- Video
-
Video
In this screencast we are introduced to the lab equipment used to contain and dispense chemicals.
- Subjects:
- Laboratory Techniques and Safety and Chemistry
- Keywords:
- Chemical laboratories Laboratories
- Resource Type:
- Video
-
Video
In this interactive object, learners calculate the amount of heat evolved or absorbed in chemical reactions. Four practice problems are provided.
- Subjects:
- Chemistry
- Keywords:
- Enthalpy Thermochemistry
- Resource Type:
- Video
-
Video
Learners view several movie clips that demonstrate the use of an indicator to follow the neutralization reaction that occurs when an acid and a base are mixed. Students test their knowledge in a series of questions. Immediate feedback is given.
- Subjects:
- Chemistry
- Keywords:
- Acids Chemical reactions Bases (Chemistry)
- Resource Type:
- Video
-
Video
Atomic weights are used to convert the mass of a sample into the number of moles of the element in the sample and vice versa. Four examples are provided for practice.
- Subjects:
- Chemistry
- Keywords:
- Mole (Chemistry) Chemical elements Atomic weights
- Resource Type:
- Video
-
Video
In this animated and interactive object, learners examine the properties of liquids, solids, and gases.
- Subjects:
- Chemistry
- Keywords:
- Matter -- Properties
- Resource Type:
- Video
-
Video
Learners identify combination, decomposition, displacement, and combustion types of redox reactions. They also watch a video clip that demonstrates the reaction of sodium and water.
- Subjects:
- Chemistry
- Keywords:
- Reduction (Chemistry) Chemical reactions Oxidation Oxidation-reduction reaction
- Resource Type:
- Video