Given the law of conservation of energy, what happens when a 200°c iron bar is placed in thermal contact with a 30'c block of wood?
o a
energy leaves the iron bar and enters the wood until the temperatures are equal
ob.
oc.
energy leaves the wood and enters the iron bar until the temperatures are equal.
all the energy from the iron bar is transferred to the wood.
od.
all the energy from the wood is transferred to the iron bar.

What filament and tubules give a cell its shape

Nebulae are enormous clouds in outer space. they are made mostly of hydrogen gas, helium gas, and dust. some nebulae glow brightly, while others do not. the stars that people see are huge, bright balls of glowing gas. they are made mostly of hydrogen and helium. which statement correctly describes other ways in which nebulae and stars are different? a. stars can form inside a nebula but a nebula can never be produced by any star. b. a star always has a higher density than a nebula. c. stars can never form inside a nebula but a nebula can be produced by any star. d. a nebula always has a higher density than a star.

The molality of calcium chloride (cacl2) in an aqueous solution is 2.46 m. what is mole fraction of the solute?