The solid form of a substance is usually more dense than its liquid and gaseous forms. similarly the liquid form is usually more dense than the gaseous form.
which of these breaks this general density rule?
a. ice floating in a glass of water
b. vapor rising from a hot cup of tea
c. cooled magma sinking in a lava flow
d. a hot air balloon falling as the gas inside cools

24. a sports ball is inflated to an internal pressure of 1.85 atm at room temperature (25 °c). if the ball is then played with outside where the temperature is 7.5 °c, what will be the new pressure of the ball? assume the ball does not change in volume nor does any air leak from the ball a) 0.555 atm b) 1.74 atm c) 1.85 atm d) 1.97 atm

Identify the electromagnets with poles that are reversed from the electromagnet shown above

The picture represents the process that produces most of the energy used by living organisms on earth. which process is represented in the picture? a) the magnetic attraction between two hydrogen nuclei. b) the fusion of hydrogen nuclei to produce a helium nucleus in the core of the sun. c) the fission of hydrogen nuclei to produce a helium nucleus in the core of the sun. d) the chemical reaction between hydrogen nuclei to produce a helium nucleus in earth's atmosphere.