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: The epidermis of the leaf consists of a single layer of tightly-packed dermal cells. They secrete waxy cuticle to prevent evaporation of water from the leaf. The epidermis has tiny pores called stomata (singular, stoma) that control transpiration and gas exchange with the air. Figure below explains how stomata carry out this vital function. Q: The epidermis of the leaf consists of a single layer of which cells? Choices: - endothermic cells - insular cells - chloroplasm - dermal cells A:
dermal cells
Q: Answer the following question given this paragraph: Q: What two microorganisms have different membrane lipids? Choices: - microsporidia and bacteria - mesozoic and bacteria - algae and bacteria - archaea and bacteria A:
A: archaea and bacteria
Question: Answer the following question given this paragraph: part of a vertebrate endoskeleton that encloses and protects the brain; also called the skull. Q: The skull is a part of a vertebrate endoskeleton that encloses and protects what organ? Choices: - nervous system - lung - heart - brain A:
Answer: brain
*Question*
Answer the following question given this paragraph: The modern day formulation of gun powder is called black powder. It is still commonly used today. Its formulation is still quite similar to what was used in 9 th century China. Black powder is considered a low explosive. It is a mixture that burns quickly, but the resulting shock wave travels at subsonic speeds. The speed at which it burns is dependent on the accessibility of oxygen atoms to the carbon source. In contrast, high explosives like nitroglycerin detonate instead of burning, creating shock waves that are supersonic (faster than the speed of sound). Q: High explosives create shock waves that exceed the speed of sound, a phenomenon that goes by what term? Choices: - light speed - ion speed - turbulence - supersonic A:
**Answer**
supersonic
Q: Answer the following question given this paragraph: We can also consider the reverse reaction in the above equation. In that reaction, the ammonium ion donates a proton to the hydroxide ion. The ammonium ion is a Brnsted-Lowry acid, while the hydroxide ion is a Brnsted-Lowry base. Most Brnsted-Lowry acid-base reactions can be analyzed in this way. There is one acid and one base as reactants, and one acid and one base as products. Q: The ammonium ion is what type of acid? Choices: - normal -lowry - kaon - lowry - oxidized - lowry - brnsted-lowry A:
A: brnsted-lowry