Most popular questions and responses by RM
  1. physics

    In an arcade game a 0.142 kg disk is shot across a frictionless horizontal surface by compressing it against a spring and releasing it. If the spring has a spring constant of 174 N/m and is compressed from its equilibrium position by 8 cm, find the speed

    asked on December 25, 2011
  2. ChemistryStociometry

    6.0g of cobolt (II) carbonate was added to 40cm3 of hydrochloric acid, concentration 2.0 mol/dm3. Calculate the maximum yield of cobalt (II) choloride-6-water and show that cobalt (II) carbonate was in excess. CoCO3 +2HCl = CoCl2 +CO2 + H2O CoCl2 + 6H2O =

    asked on January 1, 2017
  3. physics

    The amount of radiant power produced by the sun is approximately 3.9 x 1026 W. Assuming the sun to be a perfect blackbody sphere with a radius of 6.96 x 108 m, find its surface temperature (in kelvins).

    asked on May 15, 2012
  4. physics

    A copper kettle contains water at 24.2 °C. When the water is heated to 87.3 °C, the volume of the kettle expands by 7.34 x 10-5 m3. Determine the volume of the kettle at 24.2 °C.

    asked on May 7, 2012
  5. math

    a certain spinner has equally sized slices. The odds in favor of landing on a blue slice are 2:5.What is the probablility of landing on a blue slice?

    asked on November 16, 2013
  6. physics

    How much heat in joules must be added to 0.348 kg of aluminum to change it from a solid at 138 °C to a liquid at 660 °C (its melting point)? The latent heat of fusion for aluminum is 4.0 x 105 J/kg.

    asked on May 15, 2012
  7. physics

    In an old house, the heating system uses radiators, which are hollow metal devices through which hot water or steam circulates. In one room the radiator has a dark color (emissitivity = 0.818). It has a temperature of 64.8 oC. The new owner of the house

    asked on May 15, 2012
  8. Physics

    A 8.9 kg bowling ball traveling at 16.7 m/s strikes a 1.1 kg bowling pin. The impact slows the bowling ball to 11.4 m/s. Determine the velocity given to the pin.

    asked on January 25, 2018
  9. math

    mrs loya sponsers the spanish club at central middle school.the club has 8 members who are sixth graders,12 members who are sventh graders, 10 members who are eight graders. what percent of the spanish club members are seventh graders(what is your answer

    asked on January 30, 2011
  10. math

    michelle runs 400 meters in 1 minute. if she completes in the 100-meter race , about how many seconds will it take her to run the race?(explain how you got your answer)

    asked on January 30, 2011
  11. math

    A room is 12 feet by 16 feet. on a scale drawing the 12-foot wall is 4 inches long. how long will the 16-foot wall be?(explain how you got answer)

    asked on January 30, 2011
  12. economics

    If a country such as Europe sells their saved dollars as a result in a drop in U.S. sales and purchases, will the demand-supply graph show only the demand for the dollar. I just don't understand what the demand-supply graph suppose to illustrate. Help.

    asked on April 16, 2008
  13. Biology

    This is the homework exercise: You want to add 0.13 ul of DNA to 4.87 ul of extraction mix to have a final total of 5.0 ul of sample. But you don't want to make 0.13 aliquots because it is too small. Make a dilution to accomodate for the small aliquot. Any

    asked on March 27, 2013
  14. math

    a + b = 6, b + c = 20, and c + a = 7.5, solve for a , b and c.

    asked on February 22, 2009