Answer the following question given this paragraph: Kirchhoff's Second Rule Kirchhoff's second rule (the loop rule) is an application of conservation of energy. The loop rule is stated in terms of potential, V , rather than potential energy, but the two are related since PE elec = qV . Recall that emf is the potential difference of a source when no current is flowing. In a closed loop, whatever energy is supplied by emf must be transferred into other forms by devices in the loop, since there are no other ways in which energy can be transferred into or out of the circuit. Figure 21.23 illustrates the changes in potential in a simple series circuit loop. Kirchhoff's second rule requires emf equals the sum of the. Q: Kirchhoff's second rule (the loop rule) is an application of conservation of what? Choices: - heating - Rock - mineral - energy A:
energy
Answer the following question given this paragraph: Writing a formula for a ternary ionic compound also involves the same steps as for a binary ionic compound. Write the symbol and charge of the cation followed by the symbol and charge of the anion. Use the crisscross method to ensure that the final formula is neutral. Calcium nitrate is composed of a calcium cation and a nitrate anion. Q: What is composed of a calcium cation and a nitrate anion? Choices: - calcium carbonate - dynamite - nitrous oxide - calcium nitrate A:
calcium nitrate
Q: Answer the following question given this paragraph: Native elements contain only atoms of one type of element. They are not combined with other elements. There are very few examples of these types of minerals. Some native elements are rare and valuable. Gold, silver, sulfur, and diamond are examples. Q: What do you call elements that contain only atoms of one type of element? Choices: - typical elements - noble gases - reactive elements - native elements A:
A: native elements
Question: 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:
Answer: chemical reaction
*Question*
Answer the following question given this paragraph: Particles that are too large to be suspended move along the stream bed by saltation. Q: What process allows particles too large to move along the stream bed? Choices: - diffusion - channelization - impaction - saltation A:
**Answer**
saltation
Answer the following question given this paragraph: Altitude is height above sea level. The density of air decreases with height. There are two reasons. At higher altitudes, there is less air pushing down from above. Also, gravity is weaker farther from Earth's center. So at higher altitudes, air molecules can spread out more. Air density decreases. You can see this in Figure below . Q: Altitude is height above what? Choices: - the earth's core - the earth's surface - the water table - sea level A:
sea level