An alloy is made by mixing 180cmº iron metal of density 2000kg/m3 with 120cm of lead meal of density 4g/cm3 Calculate the density of the alloy.

Which notation is used to represent an alpha particle? a. b. c. d.

Explain why you think this diagram shows what happened to the carbon in the biodome.

During a medieval siege of a castle, the attacking army uses a trebuchet to hurl heavy stones at the castle walls. if the trebuchet launches the stones with a velocity of at an angle of 50.0°, (a) how long does it take the stone to hit the ground? (b) what is the maximum distance that the trebuchet can be from the castle wall to be in range? (c) how high will the stones go? show all your work.