Ques: Answer the following question given this paragraph: If the experimental value is less than the accepted value, the error is negative. If the experimental value is larger than the accepted value, the error is positive. Often, error is reported as the absolute value of the difference in order to avoid the confusion of a negative error. The percent error is the absolute value of the error divided by the accepted value and multiplied by 100%. Q: If the experimental value is less than the accepted value, the error is what? Choices: - positive - effective - caused - negative A:
Ans: negative

Ques: Answer the following question given this paragraph: Some machines change the direction of the force applied by the user. They may or may not also change the strength of the force or the distance over which the force is applied. Two examples of machines that work this way are the claw ends of hammers and flagpole pulleys. You can see in the Figure below how each of these machines works. In both cases, the direction of the force applied by the user is reversed by the machine. Q: Claw ends of hammers and flagpole pulleys are examples of simple machines that reverse what? Choices: - direction of power - direction of work - direction of friction - direction of force A:
Ans: direction of force

Ques: Answer the following question given this paragraph: Electron Configurations of Ions We have seen that ions are formed when atoms gain or lose electrons. A cation (positively charged ion) forms when one or more electrons are removed from a parent atom. For main group elements, the electrons that were added last are the first electrons removed. For transition metals and inner transition metals, however, electrons in the s orbital are easier to remove than the d or f electrons, and so the highest ns electrons are lost, and then the (n 1)d or (n 2)f electrons are removed. An anion (negatively charged ion) forms when one or more electrons are added to a parent atom. The added electrons fill in the order predicted by the Aufbau principle. Q: Ions are formed when atoms gain or lose what? Choices: - mass - protons - neutrons - electrons A:
Ans: electrons

Ques: Answer the following question given this paragraph: The breasts are not directly involved in reproduction, but they nourish a baby after birth. Each breast contains mammary glands , which secrete milk. The milk drains into ducts leading to the nipple. A suckling baby squeezes the milk out of the ducts and through the nipple. Q: What are the glands that secrete milk in a woman's breasts? Choices: - primordial glands - pituitary glands - lactic acids - mammary glands A:
Ans:
mammary glands