Answer the following question given this paragraph: The spiral staircase in Figure below also contains an inclined plane. Do you see it? The stairs that wrap around the inside of the walls make up the inclined plane. The spiral staircase is an example of a screw. A screw is a simple machine that consists of an inclined plane wrapped around a cylinder or cone. No doubt you are familiar with screws like the wood screw in Figure below . The screw top of the container in the figure is another example. Screws move objects to a higher elevation (or greater depth) by increasing the force applied. Q: Screws move objects to a higher elevation by increasing what? Choices: - velocity - torque - kinetic energy - force applied A:
force applied
Answer the following question given this paragraph: Q: When light strikes the rods and cones, they hyperpolarize, shutting off their release of what? Choices: - enzyme - vitreous fluid - dopamine - glutamate A:
glutamate
Q: Answer the following question given this paragraph: The second equation is equivalent to the first. Voltage is not the same as energy. Voltage is the energy per unit charge. Thus a motorcycle battery and a car battery can both have the same voltage (more precisely, the same potential difference between battery terminals), yet one stores much more energy than the other since PE = qV . The car battery can move more charge than the motorcycle battery, although both are 12 V batteries. Q: What term is not the same as energy, but means the energy per unit charge? Choices: - frequency - speed - mass - voltage A:
A: voltage
Question: Answer the following question given this paragraph: Bases are less common as foods, but they are nonetheless present in many household products. Many cleaners contain ammonia, a base. Sodium hydroxide is found in drain cleaner. Antacids , which combat excess stomach acid, are comprised of bases such as magnesium hydroxide or sodium hydrogen carbonate. Q: What are antacids comprised of? Choices: - gases - solids - acids - bases A:
Answer: bases
*Question*
Answer the following question given this paragraph: Archimedes' law explains why some objects float in fluids even though they are very heavy. It all depends on how much fluid they displace. The cruise ship pictured in the opening image is extremely heavy, yet it stays afloat. If a steel ball with the same weight as the ship were placed in water, it would sink to the bottom. This is modeled in the Figure below . The reason the ball sinks is that its shape is very compact, so it displaces relatively little water. The volume of water displaced by the steel ball weighs less than the ball itself, so the buoyant force is not as great as the force of gravity pulling down on the ball. Thus, the ball sinks. Q: What law explains why some objects float and some sink. Choices: - newton's law - montenegrins ' law - flanges ' law - archimedes' law A:
**Answer**
archimedes' law
(Q).
Answer the following question given this paragraph: Light is a wave of changing electric and magnetic fields. Light waves are caused by disturbances in an electromagnetic field, like the acceleration of charged particles (such as electrons). Light has a dual nature; at times, it acts like waves, while at other times it acts like particles, called photons . Light travels through space at the maximum speed allowed by the laws of physics, called the speed of light. Light has no mass, but it carries energy and momentum. Fermat's principle states that light will always take the path that takes the least amount of time (not distance). Q: Fermat's principle states that what will always take the path that takes the least amount of time? Choices: - sound - wind - electricity - light A:
(A).
light