Most popular questions and responses by sisca
  1. physic

    A "seconds pendulum" is one that moves through its equilibrium position once each second. (The period of the pendulum is precisely 2.000 s.) The length of a seconds pendulum is 0.9928 m at Tokyo and 0.9943 m at Cambridge, England. What is the ratio of the

    asked on May 20, 2011
  2. physic

    An air column in a glass tube is open at one end and closed at the other by a movable piston. The air in the tube is warmed above room temperature, and a 350 Hz tuning fork is held at the open end. Resonance is heard when the piston is at a distance d1 =

    asked on June 1, 2011
  3. physic

    In certain ranges of a piano keyboard, more than one string is tuned to the same note to provide extra loudness. For example, the note at 110 Hz has two strings at this frequency. If one string slips from its normal tension of 550 N to 520.00 N, what beat

    asked on June 1, 2011
  4. microeconomic

    Consider a monopolist facing a demand curve given by P = 20 – q, where P is the market price and q is the quantity sold. The monopolist's marginal costs are MC = 2 per unit and a fixed cost of $20. What is the monopolist's profit it is charges a uniform

    asked on June 9, 2011
  5. Statistics

    In a simple linear regression you are told that the estimate of the slope coefficient was 0.9 and that the "t-statistic" for testing whether the slope parameter was unity or not was -3.6. What is the estimated standard error for the estimated slope

    asked on May 24, 2011
  6. Microeconomic

    (a) Use a normal downward sloping demand curve and an upward sloping supply curve to illustrate and explain the “deadweight loss” from the imposition of a tariff on the imported substitute for a domestically produced product. (b) Use your diagram to

    asked on May 21, 2011
  7. math

    Find a function f which satisfies the integral equation Int(bounded from 0 to x) t*f(t)dt = Int(bounded from x to 0)(t^2+1)*f(t)dt +x

    asked on May 29, 2011
  8. microeconomic

    Use the concepts of consumer and producer surplus to explain why a rent ceiling may fail to improve the welfare of low-income renters. What alternative policies to assist these people can you suggest?

    asked on May 28, 2011
  1. physic

    awesome, Thanks a lot...

    posted on May 20, 2011