Question:
A cork floats on the surface of an incompressible liquid in a container exposed to atmospheric pressure. The container is then sealed and the air above the liquid is evacuated. The cork:
A. sinks slightly
B. rises slightly
C. floats at the same height
D. bobs up and down about its old position
Answer:
The correct answer is C) floats at the same height
Explanation:
The liquid is incompressible because its density very high and leaves no room for further compaction whether or not there is atmospheric pressure. So when you put a cork on the liquid, pressure or no pressure, there is no displacement hence it floats on the same height regardless of the absence of air.
Cheers!
False. False.
A lunar eclipse occurs only when the moon is full.
A solar eclipse occurs only when the moon is new.
Sound or Soundwaves travel through mediums by vibrating molecules. Sound waves mediums can often travel through gas, liquid, and solid. Compared to liquids, solids seem to travel better because the molecules that make up the matter are packed tightly.
Answer: The question has some details missing. Here is the complete question ; An molecule adsorbed at one site on a surface. An oxygen molecule is adsorbed onto a small patch of the surface of a catalyst. It's known that the molecule is adsorbed on 1 of 576 possible sites for adsorption (see sketch at right). Calculate the entropy of this system. Round your answer to 3 significant digits.
Explanation:
The stefan boltzmaan constant for entropy is given by ;
- we are given that 576 total possible sites in which O2 can get absorbed
- w = 576, k = 1.38 x 10-23J/k
plugging the values into the equation ;
S = 1.38 x 10-23J/k X In(576)
Entropy of the system = 8.79 X 10-23J/k
Answer:
A light year is a measure of distance as opposed to a time measurement. This is because a light year is the distance light can travel in the time of a year.
