Students have been assigned to write reports on cell organelles. Eric’s report is about the organelle that supports and gives structure to plant cells. Which organelle is Eric writing about? A. Chloroplast
B. Cell wall
C. Mitochondria
D. Nucleus

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? )

Will you chech and finish these for me, because i am stumped with them.

Which simple machine is not part of this compound machine? a. lever b. pulley c. inclined plane d. wheel and axle