Why do you think irregularities in a heating surface provide better conditions for boiling a saturated liquid than a smooth surface does?
What will be an ideal response?
Irregularities in a surface means there are cracks, crevices, and pits for liquid molecules to occupy and which provide a greater surface area for heating of those molecules, resulting in faster boiling.
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The age of the Milky Way galaxy has been estimated to be at least 13 billion years based on
a. observations of globular clusters. b. observations of open clusters. c. 21-cm radiation from H I regions. d. the rotation curve of the galaxy. e. the energy produced by Sagittarius A.
A person on a sled coasts down a hill and then goes over a slight rise with speed 2.7 m/s. The top of this rise can be modeled as a circle of radius 4.1 m
The sled and occupant have a combined mass of 110 kg. If the coefficient of kinetic friction between the snow and the sled is 0.10, what friction force is exerted on the sled by the snow as the sled goes over the top of the rise? What will be an ideal response?
Using the Schrödinger equation, scientists can calculate
A) probabilities. B) the position of an electron. C) the velocity of an electron. D) all of the above
Which statement best describes the surface of Europa?
a. dark and dirty ice, heavily pocked with craters b. old and dark on some portion, but cratered with a young bright grooved terrain c. icy crust free of craters with a liquid water ocean beneath d. covered in active sulfur-based volcanoes e. mostly water ice mixed with methane