Gravity is defined as: Select one: a. an apple falling from a tree toward the ground. b. ability to accomplish a job with the least difficulty. c. natural force or pull toward the earth. Correct d. none of the above.

The law of the conservation of momentum says that the total momentum of any closed and isolated system cannot

Your science teacher brings in a speaker to talk to your class about climate change. during the session, students ask a few questions. which questions are related to the current evidence on climate change

Large electric fields in cell membranes cause ions to move through the cell wall. the field strength in a typical membrane is 1.0 x 10 7 n/c. what is the magnitude of the force on a calcium ion with charge +e? what is its acceleration? is it possible for a particle with the same charge as as calcium to have a different acceleration if placed at this location? what would change the acceleration: mass of the particle? diameter of the particle?