An aluminum calorimeter cup has a mass of 67.0 grams. it contains 22.9 grams of water. the cup
and water are in thermal equilibrium at 24.5 degrees celsius. a 147 gram piece of steel with a
specific heat of 452 j/kg/c at an original temperature of 119 degrees celsius is added to the water
and cup. if no heat is lost to the environment, what will be the final temperature of the cup, water,
and steel when the three have reached thermal equilibrium?

These models show the electron structures of two different nonmetal elements. which element is likely more reactive, and why? element 1 is more reactive because it has fewer electron shells and is toward the top of its group on the periodic table. element 1 is more reactive because it has more electrons in its valence shell and is farther to the right on the periodic table. element 2 is more reactive because it does not have a valence shell close to the nucleus, so it will attract electrons. element 2 is more reactive because it does not have a full valence shell, so it will attract electrons.

The diagram shows a boulder rolling down a hill into a valley and then up the opposite hill. at which position does the boulder have the greatest kinetic energy? ab c d

Does the distance travelled by an oscillating mass between times t=0 and t2 equal the displacement of the particle over the same time period if t2> t/2? hint: consider a sine wave starting at t1=0, then consider a closing wave starting at t1=0, for your explanation.