Professor Dave Explains
Separating Components of a Mixture by Extraction
Looking at extraction as a separation technique.
msvgo
Separation of a Solid-Solid Mixture
It explains separation of solid-solid mixture by using two methods, namely sublimation and evaporation.
Weatherthings
Weather Things: Tornado Mysteries
Over a thousand tornadoes happen every year in the United States but only few dozen take lives. Most tornadoes are brief and weak but the tornadoes that are large and powerful can wipe homes off their foundations. Tornadoes only come...
Curated Video
Bulgaria, Devil's Throat Cave
The cave descends straight down without branching in either direction. The water from the Trigrad River falls from a height of 42 meters down the cave' "throat", making it the highest underground waterfall on the Balkan Peninsula....
Weatherthings
Weather Things: Tornado Formation
Over a thousand tornadoes happen every year in the United States but only few dozen take lives. Most tornadoes are brief and weak but the tornadoes that are large and powerful can wipe homes off their foundations. Tornadoes only come...
Weatherthings
Weather Things: Fog
Clouds manifest moisture condensed in the air. In this program they are appreciated and pondered. Clouds give clues to wind direction, humidity levels, weather patterns, and they just make pretty sights. We look at the basic type of...
Getty Images
MWA Huge supercell/thunder cloud, lightning flashes coming from within, above fields, USA
MWA Huge supercell/thunder cloud, lightning flashes coming from within, above fields, USA
Getty Images
A vendor fills cans of cooking oil from a tanker truck.
A vendor fills cans of cooking oil from a tanker truck.
Getty Images
Strong tornado early in life, funnel forms and becomes less distinct, swirls of cloud spin around, USA
Strong tornado early in life, funnel forms and becomes less distinct, swirls of cloud spin around, USA
Getty Images
Montage: pouring gas during into special tank
CU ice chest; hands slide open the lid and remove 2 glass jugs filled with gasoline / WS man hands jug of gas to another man on the race track; that man walks over to a 1960 Ford Galaxy / MS 2 mechanics and a NASCAR referee, who watches...
Sherman Grinberg Film Library
Radiation dust inhalation pharmacology experiment at UCLA's Atomic Energy Project
Title card: "Atomic Energy Project, UCLA -- Pharmacology: Inhalation Studies with Radioactive Dust" / MS man in lab with respirator mask and gloves on, arms and head exposed, shakes dust from jar into funnel on apparatus then slides...
Getty Images
Bottom of Tornado Harper, Kansas Pretty pink light from setting sun, Large debris cloud, CU, USA
Bottom of Tornado Harper, Kansas Pretty pink light from setting sun, Large debris cloud, CU, USA
Sherman Grinberg Film Library
Models show off spring hats made of eating utensils and hardware in Miami, FL
Title Card: "Hats For The Spring" / CU woman wearing hat with assorted springs mounted on plastic bread tray / MS man in workshop working on original models / CU man working on model of hat with funnel on top and meat chopper hanging off...
Getty Images
A beautiful but dangerous tornado seen near Arnett, Oklahoma. This tornado occurred on the same day a deadly tornado struck Greensburg, Kansas.
A beautiful but dangerous tornado seen near Arnett, Oklahoma. This tornado occurred on the same day a deadly tornado struck Greensburg, Kansas.
Sky News
Buenos Aires Metropolitan Cathedral Exteriors
Buenos Aires Metropolitan Cathedral Exteriors
Getty Images
MS Sand smoothly being poured out of funnel to create a design on mandala / Kathmandu, Central, Nepal
MS Sand smoothly being poured out of funnel to create a design on mandala / Kathmandu, Central, Nepal
Getty Images
Visualizing the formation of a vortex
Science exhibition where a vortex is being visualized with smoke and a spotlight