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Q: Which of the following is a drawback to superconductors? They perform well only at very low temperatures. They are made from extremely expensive materials. They have very few uses. They are
dangerous to use.
A: They perform well only at very low temperatures.
Original conversation
User: Which of the following is a drawback to superconductors?

User: Which of the following is a drawback to superconductors? They perform well only at very low temperatures. They are made from extremely expensive materials. They have very few uses. They are dangerous to use.

Weegy: They perform well only at very low temperatures.
cha97mw|Points 1146|

User: The bottom of a box has a surface area of 25.0 cm2. The mass of the box is 34.0 kilograms. Acceleration due to gravity at sea level is 9.80 m/s2. What pressure is exerted by the box where it rests? 1.36 N/cm2 13.3 N/cm2 0.139 N/cm2 7.21 N/cm2

Weegy: pressure=force/area force=9.8*34=333.2N area = 25 cm2 = 25/10000 m2 =.0025m2 P= F/A = 333.2/0.0025 = 133280 Nm-2
earndollars2becomerich|Points 21|

User: A helium balloon is filled in a store at room temperature (24°C) to a volume of 6.5 L. The balloon is then taken outside where the temperature is only 8°C. What is the new volume of the balloon? 6.1 L 6.9 L 2.2 L 19 L

Weegy: 6.1L - First you need to convert these temperatures to Kelvin by adding 273 to them. The inside temperature is now 297 and the outside temperature is 281. Then you do V/T=V/T. 6.5/297=x/281 and solve for x. x=6.1 so the answer is A
vanilla2bean|Points 4164|

User: In the metric system, weight is a _____. force mass pressure volume

User: Which of the following is not a characteristic of metals? high luster conducts electric current forms crystalline solids brittle

Weegy: Brittle is not a characteristic of metals.
Sting|Points 4373|

User: The acceleration due to gravity on Earth is 9.80 m/s2. If the mass of a honeybee is 0.000100 kilograms, what is the weight of this insect? 0.100 g 0.0000102 N 0.000980 N 0.000100 kg Question #14MultipleChoice Score: A high viscosity liquid will _____. have a high resistance to flowhave little resistance to flowhave a high vapor pressurehave a low boiling point Question #15MultipleChoice Score: A cylinder is submerged in water as illustrated in the diagram. At which position is the pressure the greatest? ABCD Question #16TrueFalse Score: A hard material is easily scratched. TrueFalse Question #17MultipleChoice Score: Diffusion refers to _____. the force of attraction between the particles of the same substancethe force of attraction between the particles of two different substancesthe random movement of one substance through anotherseparation of one substance from another based on differences in density Question #18MultipleChoice Score: Which of the following is most likely to be amorphous? glasssolid sulfursolid calciumgold Question #19TextMultipleChoice Score: The acceleration due to gravity on Jupiter is greater than that on Earth. On Jupiter, a person will weigh morelessthe same. Question #20MultipleChoice Score: Crystals can have _____ bonds between their atoms. ioniccovalentmetallicall types of Question #21MultipleChoice Score: Water freezes at _____. 273°C-273°C273 K-273 K Question #22MultipleChoice Score: The plotted data is extrapolated to what temperature? 600°C-273°C-160°C0°C Question #23MultipleChoice Score: The spontaneous intermingling of atoms among different substances is accomplished by _____. molecular kinetic energydiffusiondisplacementcondensation Question #24MultipleChoice Score: Temperature is _____ to the average kinetic energy of a gas. directly proportionalinversely proportionalequalnot related Question #25MultipleChoice Score: Which of the following is likely to be made from a thermoplastic? a car bumpera grocery bagsupport beams for a buildinglawn furniture Question #26MultipleChoice Score: Each degree on the Kelvin scale equals how many degrees on the Celsius scale? 110no relationship (different scale)2.12 Question #27Matching Score: Match the vocabulary terms to their definitions. 1. surface tension the attraction between molecules at the surface of a liquid column 2. cohesion the change from the liquid to the vapor state 3. adhesion the attraction between unlike substances 4. evaporation attraction of one particle in a material for another

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