When a hot piece of iron is placed in cool water, the temperature of the iron decreases and the
temperature of the water increases. Why does this
happen?
A Heat always flows from hot objects to cold
objects.
B Heat alwaystilows from solids to liquids.
C Iron is a poor thermal conductor.
D Potential energy is converted into kinetic
energy

PLEASE ASAP

Which statement is true about hcl? (5 points) select one: a. it is a salt because it increases the concentration of metallic ions. b. it is a salt because it is formed by the reaction of an acid and a base. c. it is an acid because it increases the concentration of hydroxyl ions. d. it is an acid because it increases the concentration of hydronium ions.

How could a student test the effect of removing heat from a gas that is stored in a sealed container? what must occur in order for matter to change states?

Use the measurements in the table to determine which unidentified metal has the highest density. metal volume mass a 10.5 cm3 122 g b 14.2 cm3 132 g c 16.1 cm3 115 g d 12.7 cm3 126 g