Answers edited by SCooke

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• A ball with a mass of `4 kg` and velocity of `3 m/s` collides with a second ball with a mass of `5 kg` and velocity of `- 7 m/s`. If `20%` of the kinetic energy is lost, what are the final velocities of the balls?
  
• Question #49509
  
• What is the term describing how correct a measurement is?
  
• Question #883ac
  
• What is the enthalpy of reaction at `"373 K"` if the heat capacities are the same at `"273 K"` and we know `DeltaH_(rxn)` at `"273 K"`?
  
• How do you solve `(3x - 8) ^ { 2} - 6= 58`?
  
• How do you write `30 + 54` as the sum of two numbers times their GCF?
  
• Question #32c5c
  
• How do you find the asymptotes for `f(x)=(x+2)/sqrt(6x^2+5x+4)`?
  
• Which acid and which base would you combine to form the salt aluminum sulfate, `Al_2(SO_4)_3`?
  
• Question #0616a
  
• How is water changing state during evaporation and condensation? Does it start as a solid, liquid or gas? What does it become?
  
• There are 17 occupied seats on the bus, 11 seats are empty. What s the ratio of number of occupied seats to empty seats?
  
• The displacement, d, in millimeters of a tuning fork as a function of time, t, in seconds can be modeled with the equation `d= 0.6sin(3520pit)` What is the frequency of the tuning fork?
  
• Question #2d8b3
  
• Question #c8443
  
• Question #76a6c
  
• Question #0a35a
  
• How do you solve the polynomial inequality and state the answer in interval notation given `4x^4>=3x+1`?
  
• Why when i add `NaOH` to 1 it give 2 and not 3 ?
  
• Please how do I round 56.479 cents to the nearest cents?
  
• Question #b8716
  
• Question #480ac
  
• Question #84767
  
• Question #bf4d3
  
• What is the mode, median and mean of 5, 27, 29, 13, 18, 19, 15, 19, 19, 27, 15, 22, 13, 26, 20?
  
• What are ecologists trying to figure out by using food webs?
  
• How many molecules are in 165 g of carbon dioxide?
  
• Question #fd2d3
  
• Who proposed the idea for the League of Nations?
  
• What is the ground-state electron configuration of a neutral atom of magnesium?
  
• What new countries were formed in Southwest Asia?
  
• How do nuclear fusion reactions start?
  
• What are differences between natural gas, coal, and oil?
  
• Question #a47c8
  
• The formula of the compound is `A_2B_5`. The number of electrons in the outermost orbits of A and B respectively are?
  
• Question #6837f
  
• What is the mass of 0.0914 moles of ammonium sulfate?
  
• Question #ad38a
  
• Question #69992
  
• Question #b83fb
  
• What does energy efficiency measure?
  
• What is the sum of 2222 km and 333 km using the correct number of significant digits?
  
• Question #2be51
  
• Question #7eca9
  
• Which appear first in the fossil record: Reptiles, amphibians, birds or mammals?
  
• Question #3c8c1
  
• How did the four fundamental forces come to be?
  
• Question #64d8c
  
• Question #32f49
  
• Question #53744
  
• What is the difference between a biome and an ecosystem?
  
• Question #742bc
  
• What factors control where different climates are found?
  
• For the reaction `"CO"(g) + "NH"_3(g) rightleftharpoons "HCONH"_2(g)`, if `"3.00 atm"` of `"CO"` and `"1.40 atm"` of `"NH"_3` were allowed to react in a closed container, then if `K_p = 2.70` at a certain temperature, what is `P_(HCONH_2)` at equilibrium?
  
• A number in the range of 40 to 70 can be divided by 5 and have a remainder of 2. It can also be divided by 6 and also have a remainder of 2. What's the number?
  
• What is the structural formula for 2,3,6 trimethyl, 4 ethyl octane?
  
• How to find the relative atomic mass?
  
• When it is 12 noon in Dallas, what time is it in New York City?
  
• What is the oxidation number of the ipso carbon in `HC(=O)O^(-)`?
  
• How can we curb human population growth?
  
• What is the oxidation half reaction for `Mg(s) + ZnCl_2(ag) -> MgCl_2(ag) + Zn(s)`?
  
• Question #7a413
  
• Question #ebdd3
  
• How can GMOs be helpful to humans?
  
• A culture of bacteria is growing at a constant rate of 5% an hour. If the culture started with 3000 bacteria at 6:00 a.m. on Tuesday, calculate the approximate time that the bacteria population will reach 72,000?
  
• How much power is produced if a voltage of `8 V` is applied to a circuit with a resistance of `2 Omega`?
  
• Question #b6b70
  
• In reaction: 2H₂O(g)⇌2H₂(g)+O₂(g); ∆H=+242 kJ/mol In which direction the equilibrium shifts, if: a. Temperature is increased? b. Temperature is descreased? c. H₂ is added? d. O₂ is reduced? e. Pressure is enlarged?
  
• In the central nervous system, myelln is formed by cells called what?
  
• Using a crankshaft, a carpenter drills a hole ,1 cm in radius, through a wooden ball along a diameter. If the radius of the ball is 4 cm, what is the volume of wood remaining? .
  
• If a wave is traveling at a certain speed and you cut its frequency in half, what happens to the wavelength?
  
• A cone has a height of `14 cm` and its base has a radius of `7 cm`. If the cone is horizontally cut into two segments `2 cm` from the base, what would the surface area of the bottom segment be?
  
• How do astronomers use spectrographs?
  
• Question #89228
  
• Question #8fb72
  
• How do you find the max or minimum of `f(x)=-1/2x^2-2x+3`?
  
• You can drive your car 21.7 miles with one gallon of gasoline. At that rate, how many miles can you drive with 13.2 gallons of gasoline?
  
• Question #1a6a1
  
• How could acid rain affect food supplies?
  
• Question #46dc6
  
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