Two trains collide in a messy train

Aball bearing at 220.0 °c is dropped into a cup containing 250.0 g of water at 20.0 °c. the water and ball bearing come to a temperature of 30.0 °c. what is the heat capacity of the ball bearing in j/°c? (hint: how are the algebraic signs of q related for the ball bearing and the water? )

Which of the following are considered noble gases? a. bromine b. neon c. argon d. chlorine

Which lists the pairs of plates in order from least to greatest in terms of the work done to move the electron?