# OLGA

Most popular questions and responses by OLGA
1. ## 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?

2. ## 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

3. ## 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?

4. ## 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

5. ## 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?

6. ## 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

7. ## 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

8. ## bussness math

Christina Fox took out a simple interest loan at 5% for 12 months. Her previous balance is \$200. What is the interest for the next payment?

9. ## 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

10. ## 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?

11. ## Accounting

A company that uses the perpetual inventory system purchased \$8,500 on September 25. Terms of the purchase were 2/10, n/30. The invoice was paid in full October 4. Prepare the journal entries to record these merchandise transactions.

12. ## 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?

13. ## 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

14. ## 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?

15. ## 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?

16. ## 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?

17. ## 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?

18. ## Calculus

The measurement of the side of a square is found to be 12 cm with a possible error of 0.05 cm. Use differentials to estimate the propagated error ΔA in computing the area of the square. Please do not include the ± symbol in your answer. Round your final

19. ## Math

In one hour, Ed used 2/5 of time to complete his homework and 1/4 of the time to check his email. How much time did he spend completing homework and checking email? Write answer as a fraction

20. ## 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)?

21. ## 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?

22. ## 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?

Write an algebraic expression for the phrase. the sum of b and 11 a. b/11 b. b + 11 c. 11b d. b – 11

24. ## 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?

25. ## CHEM

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

26. ## 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?

27. ## 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

28. ## 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.

29. ## 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?

30. ## 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?

31. ## 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

32. ## 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

33. ## Calculus

Determine the linear approximation of 21/2. Express your answer as a reduced fraction in the form a/b.

34. ## 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?

35. ## penn foster

which suffix means pertaining to conditions present at birth

36. ## ss

what is the significance of a tributary?

37. ## Calculus

The function defined below satisfies Rolle's Theorem on the given interval. Find the value of c in the interval (-3, -2) where f'(c)=0. f(x) = x + 6x-1 , [-3, -2] Round your answer to two decimal places.

38. ## Calculus

Which of the following is the linear approximation formula, L(x), that estimates values of y = ln(x) + 1 for values of x near 1? a) y = x - 1 b)y = x c)y = x + 1 d)y = -x

39. ## Chemistry

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

40. ## Chemistry

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

41. ## 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

42. ## 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?

43. ## Chemistry

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

44. ## 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?

45. ## 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)?

46. ## physics

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

47. ## 9gr

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

48. ## calculus

Evaluate the integral. from 1 to 5 (ln(x))^2/x^3 dx.

49. ## math

3(x+4)-5= n is 9

50. ## Calculus

The function defined below satisfies Rolle's Theorem on the given interval. Find the value of c in the interval (0,1) where f'(c)=0. f(x) = x3 - 2x2 + x, [0, 1] Round your answer to two decimal places.

51. ## Calculus

The function defined below satisfies the Mean Value Theorem on the given interval. Find the value of c in the interval (1, 2) where f'(c)=(f(b) - f(a))/(b - a). f(x) = 1.5x-1 + 1.1 , [1, 2] Round your answer to two decimal places.

52. ## physics

An object traveling 339 m/s strikes a 2nd object and comes to rest 24 cm inside of the 2nd object (which does not move). What is the 1st object's average deceleration (m/s/s)?

53. ## Language art

Are the words " knowledgable and "daring" nouns in the sentence --" readers admire his knowledge and daring I think readers are nouns but why would knowledge and daring be nouns.

54. ## game theory

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

55. ## chemistry

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

56. ## 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?

57. ## 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

58. ## 9gr

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

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.?????

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?

61. ## English

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

1. ## Math

A company that uses the perpetual inventory system purchased \$8,500 on September 25. Terms of the purchase were 2/10, n/30. The invoice was paid in full October 4. Prepare the journal entries to record these merchandise transactions.

posted on March 27, 2019
2. ## Math

(10,12)

posted on May 2, 2018
3. ## English

d?

posted on October 17, 2017

Emma says the product of a 3 digit number and a 1 digit number will be either a 3 digit number or a 4 digit number

posted on October 28, 2016
5. ## Health

I think is D

posted on June 30, 2016
6. ## life orientation

By m aking project.by teaching people.making a sort of media talking about human rights.

posted on May 1, 2016
7. ## life orientation

posted on April 27, 2016
8. ## Physics

r=100 perimeter 2pi r = 2x3.14x100 = 628 m 4.5 times a) 4.5 x 628 = 2826 b) 628/2 = 314

posted on October 17, 2015
9. ## physics

600/9.8 = 61.2 kg

posted on September 27, 2015
10. ## math

Ten

posted on August 31, 2015
11. ## math

24!!!

posted on December 4, 2013
12. ## Math/Statistics

A

posted on June 9, 2013
13. ## penn foster

ical,iac,ic,ial

posted on March 22, 2011
14. ## math

74

posted on February 26, 2011
15. ## physics

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

posted on February 9, 2011
16. ## CHEM

okay then, what is calcium phospite?

posted on September 26, 2010

Thanks

posted on September 9, 2010

B+11

posted on September 9, 2010

Why?

posted on September 9, 2010
20. ## Legal Aspects of Health Info

The answers are in the book.

posted on April 7, 2009
21. ## health information

posted on March 22, 2009
22. ## health information

posted on March 22, 2009
23. ## confudentiality health information

posted on March 22, 2009
24. ## 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.

posted on March 22, 2009
25. ## 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.

posted on January 24, 2009
26. ## 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.

posted on January 24, 2009
27. ## Chemistry

.0042

posted on September 8, 2008