Answer the following question given this paragraph: Stress is the force applied to a rock. There are four types of stresses:. Q: How many different types of stresses are there? Choices: - five - seven - three - four A:
four

Answer the following question given this paragraph: Figure 20.4 Current I is the rate at which charge moves through an area A , such as the cross-section of a wire. Conventional current is defined to move in the direction of the electric field. (a) Positive charges move in the direction of the electric field and the same direction as conventional current. (b) Negative charges move in the direction opposite to the electric field. Conventional current is in the direction opposite to the movement of negative charge. The flow of electrons is sometimes referred to as electronic flow. Q: Positive charges move in the direction of the electric field and the same direction as what current? Choices: - alternating current - direct current - relativity current - conventional current A:
conventional current

Answer the following question given this paragraph: A chemical reaction is a process that changes some chemical substances into others. During a chemical reaction, the reactants are used up to create the products. Q: What is the term for a process that changes some chemical substances into others? Choices: - acid reaction - toxic reaction - chain reaction - chemical reaction A:
chemical reaction