Sushmitha
Most popular questions and responses by Sushmitha
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 
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 
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 
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 
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 
Physics
A diagram has vector A at 30 degrees above the positive x axis. length = 3 m Vector B is ON the negative xaxis. length = 1 m Vector C is ON the negative yaxis. Length is 2 m What is the direction in degrees of vector a + vector B + vector C?
asked on January 29, 2012 
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 
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 
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 
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 
algebra
open box made from 33 x 33 inch sheet of metal by cutting out xinch 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 
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 
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 
chemistryredox
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 S2 to S+6? making sulfur ixidized too, and not reduced?
asked on January 21, 2013 
Econ  help please
demand for sulfur dioxide by coalfired 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 
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 
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 
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 
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 
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 
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 
Econ  please help
demand for sulfur dioxide by coalfired 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 oneton sulfur
asked on November 15, 2011 
ECON
demand for sulfur dioxide by coalfired 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 
algebra
Find all solutions to x^4 + 3x^2 = 4x^3 + 1
asked on October 16, 2011 
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 
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 
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 
ECON  urgent please help
demand for sulfur dioxide by coalfired 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 
Econ  more help please
demand for sulfur dioxide by coalfired 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 
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 
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 
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 
math
5^(x+3) = 64 I have only had exponents to the x, not with +3 too.
asked on November 5, 2011 
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 
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 
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

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 
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 
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 
algebra
OK, I got it.
posted on October 15, 2011 
algebra
so how do i find the max volume?
posted on October 15, 2011