Sushmitha

Newest questions and responses by Sushmitha

  1. Science

    Which law of chemical is illustrated by the fact that 168g of iron with 72g of water to form 232g of ferric oxide And 8g hydrogen

    asked on January 5, 2016

  2. Maths

    Your grandmother opened an investment account of $1,000(initial deposit) 15 years ago. Today it's worth $39,533.32 What is average annual rate of return that she earned? Thank you.

    asked on February 12, 2014

  3. math

    Subjects were asked to taste two wine samples in sequence. Both samples given were the same wine although subjects were expecting to taste two different samples. Of the 32 subjects in the study, 22 selected the wine presented first when presented with two

    asked on April 2, 2013

  4. chemistry-redox

    Can two elements both be oxidized in a reaction? 2FeS + 4.5O2 +2H2O==> Fe2O3 + 2H2SO4 I see Fe is oxidized, going from Fe+2 to Fe+3 However, Isn't S going from S-2 to S+6? making sulfur ixidized too, and not reduced?

    asked on January 21, 2013

  5. Chemistry

    Dr. Bob222, Please see my additional posts on Jan 20 at 2:26pm and Jan 21 at 12:33 am. This is in reference to the redox reactions: 1) Fe goes from +2 to +3, and S goes from -2 to +6. They both appear to be oxidized because they increased. Is it possible

    asked on January 21, 2013

  7. chemistry - Please help

    In the redox reaction: 2FeS + 4.5 O(subscript 2)+ 2H(subscript 2)O > Fe(subscript 2)O(subscript 3) + 2H(subscript 2)SO(subscript 4) Fe is oxidized or reduced (select one) from ___ to ___. S is oxidized or reduced (select one) from ___ to ___.

    asked on January 19, 2013

  8. math - please help

    The 7 inch diameter drive drum of a belt conveyor is turning at 130 rpm. What is the belt speed (ft/min) if there is no slip between the belt and drum?

    asked on March 30, 2012

  9. math

    The 7 inch diameter drive drum of a belt conveyor is turning at 130 rpm. What is the belt speed (ft/min) if there is no slip between the belt and drum? What are the steps to figures this out? Thank you for your help.

    asked on March 29, 2012

  10. math

    What is the tip speed (ft/min) of a 21 inch long rotary lawn mower blade that is connected to the output shaft of an engine operating at 3400 rpm? What are the steps to figure this out?

    asked on March 28, 2012

  11. physics

    under the influence of its drive force, snowmobile is moving at constant velocity along a horizontal patch of snow. When drive force is shut off, snowmobile coasts to a halt. a) During the coasting phase, what is the net external force acting on the

    asked on February 12, 2012

  12. Physics

    A diagram has vector A at 30 degrees above the positive x axis. length = 3 m Vector B is ON the negative x-axis. length = 1 m Vector C is ON the negative y-axis. Length is 2 m What is the direction in degrees of vector a + vector B + vector C?

    asked on January 29, 2012

  13. Physics please help

    A duck has a mass of 2.8 kg. As the duck paddles, a force of 0.05 N acts on it in a direction due east. In addition, the current of the water exerts a force of 0.15 N in a direction of 60° south of east. When these forces begin to act, the velocity of the

    asked on January 21, 2012

  14. algebra

    a man 6.2 feet tall stands 12 feet away from a streetlight and casts a 5 ft shadow. How tall is the streetlight?

    asked on December 3, 2011

  15. Econ - please help

    demand for sulfur dioxide by coal-fired electricity electricity producers is: P= 1,000 - 16Q where Q is quantity of sulfur dioxide measured in thousands of tons, and P is price per ton of sulfur dioxide. Supposed EPA restricted the number of one-ton sulfur

    asked on November 15, 2011

  16. ECON - urgent please help

    demand for sulfur dioxide by coal-fired electricity electricity producers is: Firm A's demand: P= 1,000 - 80 Q Firm b's demand: P= 1,000 - 20 Q where Q is quantity of sulfur dioxide measured in thousands of tons, and P is price per ton of sulfur dioxide.

    asked on November 15, 2011

  18. Econ - more help please

    demand for sulfur dioxide by coal-fired electricity electricity producers is: Firm A's demand: P= 1,000 - 80 Q Firm b's demand: P= 1,000 - 20 Q where Q is quantity of sulfur dioxide measured in thousands of tons, and P is price per ton of sulfur dioxide.

    asked on November 14, 2011

  19. Econ - help please

    demand for sulfur dioxide by coal-fired electricity electricity producers is: P= 1,000 - 16Q where Q is quantity of sulfur dioxide measured in thousands of tons, and P is price per ton of sulfur dioxide. a)With no policies or restrictions on sulfur

    asked on November 14, 2011

  20. ECON

    demand for sulfur dioxide by coal-fired electricity electricity producers is: P= 1,000 - 16Q where Q is quantity of sulfur dioxide measured in thousands of tons, and P is price per ton of sulfur dioxide. a)With no policies or restrictions on sulfur

    asked on November 14, 2011

  21. math

    5^(-x+3) = 64 I have only had exponents to the x, not with +3 too.

    asked on November 5, 2011

  22. algebra - more help please

    A thermometer reading 7 degrees C is brought into a room with a constant temperature of 29 degrees C. If the thermometer reads 15 degrees C after 4 minutes, what will it read in 6 minutes? 11 minutes? So I guess I need to put into newton's law of cooling:

    asked on October 29, 2011

  23. algebra - help please

    A thermometer reading 7 degrees C is brought into a room with a constant temperature of 29 degrees C. If the thermometer reads 15 degrees C after 4 minutes, what will it read in 6 minutes? 11 minutes? So I guess I need to put into newton's law of cooling:

    asked on October 29, 2011

  24. Math - more help please

    A thermometer reading 7 degrees C is brought into a room with a constant temperature of 29 degrees C. If the thermometer reads 15 degrees C after 4 minutes, what will it read in 6 minutes? 11 minutes? So I guess I need to put into newton's law of cooling:

    asked on October 29, 2011

  25. math

    A thermometer reading 7 degrees C is brought into a room with a constant temperature of 29 degrees C. If the thermometer reads 15 degrees C after 4 minutes, what will it read in 6 minutes? 11 minutes?

    asked on October 29, 2011

  26. algebra

    Find all solutions to x^4 + 3x^2 = 4x^3 + 1

    asked on October 16, 2011

  27. algebra

    solve system of equations: y = 2x^3 - 2x^2 y = -6x^2 +30x I know (0,0) is one point. How do I get others?

    asked on October 15, 2011

  29. algebra

    open box made from 33 x 33 inch sheet of metal by cutting out x-inch square from each corner and folding up the sides. What size square should be cut out to produce a box of maximum volume? (This is algebra class)

    asked on October 15, 2011

  30. algebra

    cannon fired ffrom top of 50 ft hill. height of shell above water: h = -0.0000167x^2 + 0.23x + 50 where x is horizontal distance from the foot of the hill to a point directly under the shell. How high does the shell go, and how far away does it hit the

    asked on October 10, 2011

  31. math

    Assume r and s are the roots of the quadratic equation ax^2 + bx + c = 0, show that r + s = -b/a and rs = c/a.

    asked on October 10, 2011

  32. physics

    if three resistances in parallel circuit are all equal, the total resistance is ___ the resistance of any on branch.

    asked on May 18, 2011

  33. physics

    if three resistances in parallel circuit are all equal, the total resistance is ___ the resistance of any on branch.

    asked on May 18, 2011

  34. physics

    Three identical resistors are connected in series to a battery. The voltage drop across one of the resistors is ___ times the voltage of the source.

    asked on May 18, 2011

  35. physics

    Electric power is found by multiplying ___ by current. volts? potential difference? The kilowatt hour is a unit for measuring ___. energy or electrical energy Thanks

    asked on May 2, 2011

  36. physics - please hellp

    I need help with two questions: 1) An object can only have a charge that is an integral multiple of the charge on the ___. Am I correct with "electron" as the answer? or possibly elementary charge? 2) The difference in potential between any two points in a

    asked on April 19, 2011

  37. math please help

    use an inverse trig function to write theta as a function of x (There is a right triangle drawn. The hypotenuse is 2. Theta is the angle between the base and the hypotenuse. The base/adjacent side of theta is labeled(x + 1) The side opposite theta does not

    asked on March 30, 2011

  38. trig

    use an inverse trig function to write è as a function of x (There is a right triangle. The hypotenuse is 2. è is the angle between the base and the hypotenuse. The base/adjacent side of è is (x + 1) The side opposite è does not have a value.) a) è =

    asked on March 30, 2011

  40. physics

    1)If I am to plot a graph of Force in Newtons vs. Stretch in meters, would the x axis be force or the stretch? 2) The data table has 3 columns: force in Newtons, position in m and displacement in m. Which one is used to plot the Stretch in meters? the

    asked on March 16, 2011

  1. chemistry - Please help

    Dr. Bob222, Ok, I'm starting to see how to get the oxidation numbers. However, since S goes from -2 to+6, does it also oxidize? is it possible that both can oxidize? I thought one oxidized while the other reduced.

    posted on January 21, 2013

  2. chemistry - Please help

    DrBob222, I understand that oxidation is a loss, but appears as an increase. I still have two questions. 1) Fe goes from +2 to +3, and S goes from -2 to +6. They both appear to be oxidized because they increased. Please explain. 2)I think my problem is

    posted on January 20, 2013

  3. algebra - help please

    Still lost. I put in 6 and lost a variable. T(6) = 29 - (29 - 7) e^-0.678 29 - 22e^-0.678 -29 = -22e^-0.678 ln 1.318181818 = e^-0.678 0.276253377 = -0.678

    posted on October 29, 2011

  4. algebra

    OK, I got it.

    posted on October 15, 2011

  5. algebra

    so how do i find the max volume?

    posted on October 15, 2011