Q: What type of reaction is a process in which some substances, called reactants, change into different substances, called products? Choices: - reversible reaction - physical reaction - toxic reaction - chemical reaction A:
chemical reaction

Q: Cations are attracted to anions, which are ions with what charge? Choices: - similar - neutral - positive - negative A:
negative

Q: What force is perpendicular to velocity and causes uniform circular motion? Choices: - centripetal torque - circular friction - tangential force - centripetal force A:
centripetal force

Q: What is the vector sum of all the torques acting on the object called? Choices: - critical torque - total torque - gross torque - net torque A:
net torque