Saturday
August 23, 2014

Posts by olga


Total # Posts: 66

Math/Statistics
A
May 29, 2013

Algebra
A truck driver traveled at an average speed of 58 miles per hour on a 200-mile trip to pick up a load of freight. On the return trip (with the truck fully loaded), the average speed was 37 miles per hour. Find the average speed for the round trip.
January 19, 2013

game theory
What is the relationship between the maximin payoff and the set of NE payoffs in a finite game?
October 22, 2012

Chemistry
What amount of heat is required to raise the temperature of 10.0 g of aluminum by 15.0 C
February 8, 2012

Chemistry
What amount of heat is required to raise the temperature of 10.0 g of aluminum by 15.0 C
February 8, 2012

Chemistry
A1.367g sample of an unknown organic compound is combusted with oxygen to give only 1.459 g H2o and 3.055 g of Co2. What is the empirical formula of the compound?
October 19, 2011

chem
Nitrogen and hydrogen gases are combined at high temperatures and pressures to produce ammonia, NH3. If 104.6 g of N2 are reacted with excess H2, how many moles of NH3 will be formed?
May 16, 2011

physics
If you were to separate all of the electrons and protons in 1 g (0.001 kg) of matter, you’d have about 96,000 C of positive charge and the same amount of negative charge. If you placed these charges 5 m apart, how strong would the attractive forces between them be?
May 5, 2011

physics
You remove two socks from a hot dryer and find that they repel with forces of 0.003 N when they’re 4 cm apart. If they have equal charges, how much charge does each sock have?
May 5, 2011

physics
If a burning log is a black object with a surface area of 0.35 m2 and a temperature of 800 ¢ªC, how much power does it emit as thermal radiation?
April 21, 2011

physics
A dish of hot food has an emissivity of 0.42 and emits 15 W of thermal radiation. If you wrap it in aluminum foil, which has an emissivity of 0.06, how much power will it radiate?
April 19, 2011

physics
As you walked on the moon, the earth’s gravity would still pull on you weakly and you would still have an earth weight. How large would that earth weight be, compared to your earth weight on the earth’s surface? (Note: The earth’s radius is 6378 km and the ...
March 31, 2011

physics
If an 75-kg baseball pitcher wearing frictionless roller skates picks up a 0.145-kg baseball and pitches it toward the south at 40 m/s, how fast will he begin moving toward the north?
March 31, 2011

physics
If you and a friend 10 m away each have masses of 84 kg, how much gravitational force are you exerting on your friend?
March 31, 2011

chemistry
suppose you know the values for r, theta, and phi which specify a point. what are the corresponding values of x,y,z? Write an expression for x as a function or r, theta,and phi; then do the same for x,y,z. Using the answer to the previous question write the angular parts of ...
March 31, 2011

chemistry
spherical coordinates if n=2,l=1,ml=x, add up all the probabiliity densities.
March 31, 2011

penn foster
ical,iac,ic,ial
March 22, 2011

penn foster
which suffix means pertaining to conditions present at birth
March 22, 2011

physics
When you put water in a kitchen blender, it begins to travel in a 7-cm-radius circle at a speed of 1 m/s. How quickly is the water accelerating?
March 15, 2011

physics
Engineers are trying to create artificial "gravity" in a ringshaped space station by spinning it like a centrifuge. The ring is 120 m in radius. How quickly must the space station turn in order to give the astronauts inside it apparent weights equal to their real ...
March 15, 2011

physics
Your new designer chair has an S-shaped tubular metal frame that behaves just like a spring. When your friend, who weighs 580 N, sits on the chair, it bends downward 5 cm. What is the spring constant for this chair?
March 10, 2011

statistics
For a sample with a mean of M 45, a score of 59 corresponds to z 2.00. What is the sample standard deviation?
March 7, 2011

Chemistry
Can someone explain to me in simple terms what is relative mass and absolute mass? And how to calculate them too. Thanks.
March 4, 2011

physics
A tricycle releases 60 J of gravitational potential energy while rolling 0.59 m directly downhill along a ramp. What is the downhill force (if constant) acting on the tricycle?
March 3, 2011

physics
If you sit in a good swivel chair with your feet off the floor, the chair will turn slightly as you move about but will immediately stop moving when you do. Why can’t you make the chair spin without touching something?
March 3, 2011

physics
Your car is broken, so you’re pushing it. If your car has a mass of 868 kg, how much momentum does it have when it’s moving forward at 4.74 m/s (17.1 km/h)?
March 3, 2011

Chemistry
Some solid copper(II) sulfate is dissolved in sufficient water to make 100.0 mL of solution. Enough of a sodium hydroxide solution of concentration 0.1500 mol/L is added just to react with all of the first solution, with none left over. This turns out to be a volume of 47.08 ...
February 22, 2011

physics
Some special vehicles have spinning disks (flywheels) to store energy while they roll downhill. They use that stored energy to lift themselves uphill later on. Their flywheels have relatively small rotational masses but spin at enormous angular speeds. How would a flywheel&#...
February 21, 2011

physics
When your car is moving at 3.33 m/s and car has a mass of 860 kg, how much translational kinetic energy does it have?
February 21, 2011

math
lyle needs 200g of chocolate that is 86% cocoa for a cake recipe he has one kind that is 99% cocoa and another kind that is 70% cocoa. How much of each kind does he need to make the cake
February 17, 2011

Physics
The builders of the pyramids used a long ramp to lift 21000-kg (21-ton) blocks. If a block rose 0.86 m in height while traveling 20 m along the ramp’s surface, how much uphill force was needed to push it up the ramp at constant velocity?
February 14, 2011

physics
The earth exerts a downward force of 850 N on a veteran astronaut as he works outside the space shuttle. What force (if any) does the astronaut exert on the earth?
February 10, 2011

physics
You’re sanding a table. You must exert a force of 23 N on the sandpaper to keep it moving steadily across the table’s surface. You slide the paper back and forth for 23 minutes, during which time you move it 1090 m. How much work have you done?
February 10, 2011

physics
You’re using a wedge to split a log. You are hitting the wedge with a large hammer to drive it into the log. It takes a force of 3500 N to push the wedge into the wood. If the wedge moves 0.2 m into the log, how much work have you done on the wedge?
February 10, 2011

physics
The builders of the pyramids used a long ramp to lift 20000-kg (20-ton) blocks. What is the gravitational potential energy of one of the blocks if it’s now 79 m above the ground?
February 10, 2011

physics
A sprinter can reach a speed of 12 m/s in 0.96 s. If the sprinter’s acceleration is constant during that time, what is the sprinter’s acceleration?
February 9, 2011

physics
29.2m/s= t*.40m/s^2+0 t=29.2m/s/.40m/s^2 t=73s
February 9, 2011

physics
If your car accelerates from rest at a steady rate of 4 m/s2, how soon will it reach 81 km/h (50.3 mph or 22.5 m/s)?
February 9, 2011

physics
If your car has a mass of 770 kg, how much force is required to accelerate it forward at 4.98 m/s2?
February 2, 2011

math
74
January 26, 2011

chemistry
A 25g sample of a compound composed of Carbon, Hydrogen, and Oxygen was combusted. 55grams of Carbon Dioxide and 30 grams of water were collected. A) What is the empirical formula of the compound? B) If the compound has a molar mass of 120g what is the molecular formula?
October 8, 2010

CHEM
okay then, what is calcium phospite?
September 26, 2010

CHEM
what is the charge of a PHOSPITE ? and how do i write it?
September 26, 2010

science
Is it not at all feasible to you that this guy is a genuinely good person? Which of these words is an antonym of feasible? a. understandable b. unclear c. likely d. impossible
September 12, 2010

9gr
Is it not at all feasible to you that this guy is a genuinely good person? Which of these words is an antonym of feasible? a. understandable b. unclear c. likely d. impossible
September 12, 2010

9gr
What is the distance between the points (5, 10) and (-4, -2) in the xy-plane? 12 9 15 10
September 9, 2010

9gr
3.What is the next term in the sequence below? 8, 27, 64, 125, ... 216 343 18 10
September 9, 2010

9th grade
Write an algebraic expression for the phrase. 4 times the sum of q and p a. 4 + q + p b. 4qp c. 4q + p d. 4(q + p) MY ANSWER D.?????
September 9, 2010

9th grade
Thanks
September 9, 2010

9th grade
B+11
September 9, 2010

9th grade
Write an algebraic expression for the phrase. the sum of b and 11 a. b/11 b. b + 11 c. 11b d. b – 11
September 9, 2010

10th grade
Why?
September 9, 2010

U.S government
A
August 12, 2010

ss
what is the significance of a tributary?
April 7, 2010

social studies/canada
According to the United Nations,Canada is a great place to live. How do both natural resources and government policies combine to make this true?
March 21, 2010

English
What is the subject? One of the major celebrations during the Chinese New Year is the New Year's reunion dinner.
January 22, 2010

health
Paula Patient doesn't want her violent boyfriend to know she's getting an abortion, so she asks Dr. Bob to send all communications to her to a post office box and to phone her only at work. What should Dr. Bob do, and what is the legal basis for your advice? If she ...
April 26, 2009

Legal Aspects of Health Info
The answers are in the book.
March 31, 2009

health information
The answer is in your book. Read it again.
March 19, 2009

health information
The answer is in your book. Read it a gain.
March 15, 2009

confudentiality health information
The answer is in your books. Read them again.
March 15, 2009

Health Research Project
I finished this project and got a "B" on it. All the information you need is at the AMA site and in your book. Good luck.
November 12, 2008

Chemistry
.0042
September 6, 2008

Law and Ethics
I too am working on this research project, and found the information regarding ethical opinions at the AMA site. Now all I have to do is write the 8 paragraphs.
July 20, 2008

Reseach paper
I too am working on this research project and found what was needed at the AMA site. Now I just have to write the eight paragraphs. Good luck.
June 21, 2008

math
24!!!
February 2, 2008

Pages: 1

Search
Members