Answer the following question given this paragraph: An alternative way to define the concentration of a solution is molality, abbreviated m. Molality is defined as the number of moles of solute in 1 kg of solvent. How is this different from molarity? Would you expect a 1 M solution of sucrose to be more or less concentrated than a 1 m solution of sucrose? Explain your answer. What are the advantages of using solutions for quantitative calculations?. Q: The number of moles of solute in 1 kg of solvent is defined as what? Choices: - singularity - pollenation - kilocalorie - molarity A:
molarity
(Question)
Answer the following question given this paragraph: Scientists think that Europa is a good place to look for extraterrestrial life. Europa is the smallest of the Galilean moons. The moon's surface is a smooth layer of ice. Scientists think that the ice may sit on top of an ocean of liquid water. How could Europa have liquid water when it is so far from the Sun? Europa is heated by Jupiter. Jupiter's tidal forces are so great that they stretch and squash its moon. This could produce enough heat for there to be liquid water. Numerous missions have been planned to explore Europa, including plans to drill through the ice and send a probe into the ocean. However, no such mission has yet been attempted. Q: What is the smallest of the galilean moons? Choices: - phoebe - demos - aura - europa A:
(Answer)
europa
Ques: 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:
Ans: field vector
(Q).
Answer the following question given this paragraph: The 1,000 or so species of cartilaginous fish are subdivided into two subclasses: the first includes sharks, rays, and skates; the second includes chimaera, sometimes called ghost sharks. Fish from this group range in size from the dwarf lanternshark, at 6.3 inches, to the over 50-foot whale shark. Sharks obviously have jaws, as do the other cartilaginous fish. These fish evolved from the jawless fish. So why did fish eventually evolve to have jaws? Such an adaptation would allow fish to eat a much wider variety of food, including plants and other organisms. Q: What is another term for ghost sharks? Choices: - anascea - litoria - aurea - chimaera A:
(A).
chimaera
Ques:Answer the following question given this paragraph: Gases have much lower densities than liquids and solids. For example, liquid water is over 1000 times more dense than water vapor at STP. Q: Which state of matter has the lowest density? Choices: - liquids - fluids - solids - gases A:

Ans:gases
Ques:Answer the following question given this paragraph: Biochemical compounds are carbon-based compounds that are found in living things. The similarity in biochemical compounds between living things provides evidence for the evolution of species from common ancestors. Q: The similarity in biochemical compounds between living things provides evidence for the evolution of species from what? Choices: - recent ancestors - varied ancestors - rare tribes - common ancestors A:

Ans:
common ancestors