Questions asked by Hriman

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• Tan(2x)-cot(x)=0?
  
• This question is about calorimeter constant. Does the lower the calorimeter constant mean the better the heat retainment?
  
• Why don't insulators need a high specific heat?
  
• Draw a sankey diagram, for a hydroelectric dam, from reservoir to home, and for a wind turbine, from blades to home?
  
• Can anyone explain why simple harmonic motion is defined by acceleration being proportional to the negative displacement?
  
• A ship leaves port on a course with a bearing of 20 degrees. After sailing in that direction for 76 kilometers, it changes course to a bearing of 105 degrees and travels for 143 km. If the ship went directly back to Port, what bearing did it take?
  
• How can you best define the concept of time? How can we say that time started after the Big Bang? How did this arbitrary concept first come about?
  
• Why is there no elements of fiction section in English Grammar? I understand it wouldn't fall under grammar really, but the analysis of fiction is important in English, right?
  
• Any method to remember the IMPORTANT U.S. presidents in order, with a few of their achievements?
  
• What is the name of the salt product formed from a neutralization reaction between butanoic acid and sodium hydroxide?
  
• Can you write a brief summary of how gene regulation works in Eukaryotes?
  
• Is this correct? Arithmetic sum and sequence #sum_(n=51)^100 7n#
  
• A scientist says light is matter because it made of particles called photons that contain energy, which is the equivalent of mass, using #E=mc^2#, state the extent to which his belief is justified?
  
• Element X has a half life of 32 mins, 16 g of element X is decayed in 10 half lives, how much sample was initially available?
  
• Derive the frequency for a third harmonic in a closed pipe from #f=v/lamda# ?
  
• State the units for intensity using only fundamental units? (Hint: work from #W/(m^2)#)
  
• Show the simplification from #(8.31 "LKPa")/("molK"# to #(8.31 "J")/("molK")#?
  
• A kid is trying to solve a problem and he has: #(13m/s^2*12m/s*21 kg)/(2000 A)=# State his answer with one unit?