Answer the following question given this paragraph: 21.4 DC Voltmeters and Ammeters Voltmeters measure voltage, and ammeters measure current. A voltmeter is placed in parallel with the voltage source to receive full voltage and must have a large resistance to limit its effect on the circuit. An ammeter is placed in series to get the full current flowing through a branch and must have a small resistance to limit its effect on the circuit. Both can be based on the combination of a resistor and a galvanometer, a device that gives an analog reading of current. Standard voltmeters and ammeters alter the circuit being measured and are thus limited in accuracy. Q: What do voltmeters measure? Choices: - temperature - amplitude - frequency - voltage A:
voltage
Answer the following question given this paragraph: Q: What is it called when bones get longer and bigger? Choices: - expansion - replication - reproduction - growth A:
growth
Q: Answer the following question given this paragraph: Humans have walked on only two planetary bodies: Earth and the Moon. The footprints the men left behind are the first signs of life ever on the Moon. Scientists learned a great deal about the Moon from the Apollo missions. The samples that were brought back have been studied in laboratories. We know an incredible amount about the Moon because of these samples. Having these rocks radically changed our thinking about the Moon. Q: Which two planetary bodies have humans walked on? Choices: - Mars and Jupiter - The Sun and Mars - Earth and Saturn - earth and the moon A:
A: earth and the moon
Question: Answer the following question given this paragraph: There are a variety of substances in foods that the body needs. Any substance in food that the body needs is called a nutrient. There are six major types of nutrients: carbohydrates, proteins, lipids, water, minerals, and vitamins. Carbohydrates, proteins, and lipids can be used for energy. Proteins also provide building materials. Proteins, minerals, and vitamins help control body processes. Water is needed by all cells just to stay alive. Q: What do you call any substance in food that the body needs? Choices: - dietary - antioxidant - beneficial - a nutrient A:
Answer: a nutrient
*Question*
Answer the following question given this paragraph: Since the force on a charged particle in a magnetic field is always perpendicular to both its velocity vector and the field vector (check this using the second right hand rule above), a constant magnetic field will provide a centripetal force --- that is, a constant force that is always directed perpendicular to the direction of motion. Two such force/velocity combinations are illustrated above. According to our study of rotational motion, this implies that as long as the particle does not leave the region of the magnetic field, it will travel in a circle. To find the radius of the circle, we set the magnitude of the centripetal force equal to the magnitude of the magnetic force and solve for :. Q: The force on a charged particle in a magnetic field is always perpendicular to both its velocity vector and the? Choices: - position vector - track vector - gravity vector - field vector A:
**Answer**
field vector
(Question)
Answer the following question given this paragraph: Thermal Expansion The intermolecular forces in liquids are strong enough to keep them from expanding significantly when heated (typically only a few percent over a 100C temperature range). Thus the volumes of liquids are somewhat fixed. Notice from Table 11.1 "The Density of Water at Various Temperatures" that the density of water, for example, changes by only about 3% over a 90-degree temperature range. Table 11.1 The Density of Water at Various Temperatures. Q: What forces in liquids are strong enough to keep them from expanding significantly when heated? Choices: - particles forces - outermolecular forces - gravitational forces - intermolecular forces A:
(Answer)
intermolecular forces