Saturday
April 19, 2014

Posts by olga


Total # Posts: 67

Math/Statistics
A

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.

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

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

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

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?

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?

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?

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?

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?

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?

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 dista...

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?

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?

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 th...

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

penn foster
ical,iac,ic,ial

penn foster
which suffix means pertaining to conditions present at birth

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?

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 wei...

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?

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?

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

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?

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?

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)?

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 m...

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...

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?

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

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?

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?

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?

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?

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?

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?

physics
29.2m/s= t*.40m/s^2+0 t=29.2m/s/.40m/s^2 t=73s

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)?

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

math
74

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?

CHEM
okay then, what is calcium phospite?

CHEM
what is the charge of a PHOSPITE ? and how do i write it?

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

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

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

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

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.?????

9th grade
Thanks

9th grade
B+11

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

10th grade
Why?

U.S government
A

ss
what is the significance of a tributary?

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?

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

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 tel...

Legal Aspects of Health Info
The answers are in the book.

health information
The answer is in your book. Read it again.

health information
The answer is in your book. Read it a gain.

confudentiality health information
The answer is in your books. Read them again.

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.

Chemistry
.0042

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.

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.

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.

math
24!!!

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