# Johnson

Popular questions and responses by Johnson
1. ## Phyics

A spiral staircase winds up to the top of a tower in an old castle. To measure the height of the tower, a rope is attached to the top of the tower and hung down the center of the staircase. However, nothing is available with which to measure the length of

2. ## physics

A spring scale is calibrated from zero to 20. N. The calibrations extend over a length of 0.10 m. (a) What is the elastic potential energy of the spring in the scale when a weight of 5.0 N hangs from it? (b) What is the elastic potential energy when the

3. ## chemistry

If a student attempts to identify an unknown compound by methodused in this experiment. She finds that when she heated a sampleweighing 0.4862 g the mass went down appreciably, to 0.3067 g. Whenthe product was converted to chloride, the mass went up, to

4. ## algebra

ben bought a car for \$20,000 in 2003. The car depreciates at a constant rate of 21% per year . Find the price of the car in the year 2010 . Round to nearest dollar

5. ## physics

a body is under of 2 forces 7n and 10n find the resultant of 2 forces if (a)the forces are parallel and act in thesame direction (b)the forces are parallel and act in opposite direction(c)the two forces are inclined and act at an angle of 60 degree to each

6. ## physics

a body is under of 2 forces 7n and 10n find the resultant of 2 forces if (a)the forces are parallel and act in thesame direction (b)the forces are parallel and act in opposite direction(c)the two forces are inclined and act at an angle of 60 degree to each

7. ## physics

a bullet is fire in a horizontal direction with a muzzle velocity of 300m/s in the absence of air resistance, how far will it have dropped in travely a horizontal distance of(a)20m?(b)40m?(c)60m? how far will it drop in one second

8. ## Chemistry

Explain, in terms of particles, concentration, and reaction rate, what you expect to happen when methane gas (CH4) and hydrogen sulfide gas (H2S) are sealed in a flask and reach a state of equilibrium. CH4 (g) +2 H2S (g) CS2 (g) + 4 H2 (g)

9. ## Physics

Use scale drawing method: If a man travels 7km 30degree east of north,then 1okm east,find the resultant displacement

10. ## Physics

A jogger's internal energy changes because he performs 6.80 105 J of work and gives off 4.9 105 J of heat. However, to cause the same change in his internal energy while walking, he must do 8.10 105 J of work. Determine the magnitude of the heat given off

11. ## Phyics

A 1390-N uniform beam is attached to a vertical wall at one end and is supported by a cable at the other end. A 1960-N crate hangs from the far end of the beam. Using the data shown in the figure, find (a) the magnitude of the tension in the wire and the

12. ## Math

A particle moves along a straight line with a velocity, v ms/s, given by v = 4 - 8 sin 2t where t is the time in seconds after passing a fixed point O. 1. Determine the range of values of v.

13. ## Physics

A 0.21 kg ball on a string is whirled on a vertical circle at a constant speed. When the ball is at the three o'clock position, the tension is 18 N. -------------------------------------------------------------------------------- (a) How does the magnitude

14. ## Physics

The pressure and volume of a gas are changed along a path ABCA in the figure. The vertical divisions on the graph represent 3.50 105 Pa, and the horizontal divisions represent 2.00 10-3 m3. Determine the work done (including algebraic sign) in each segment

15. ## Math

Ken planted a mongo seed. He noticed that the seed grew 1/5 times larger than the previous week. This week he measured the plant and found out that it is 10cm tall. How tall will the plant be in two weeks from now?

16. ## Further Mathematics

The first term of a g.p is 7 while the common ratio is 3.find the 11th term.

17. ## Physics

A ruler is accurate when the temperature is 25°C. When the temperature drops to -16°C, the ruler shrinks and no longer measures distances accurately. However, the ruler can be made to read correctly if a force of magnitude 1.2 103 N is applied to each

18. ## algebra

10 and Carlos's age Use the variable c to represent Carlos's age.

19. ## Physics

An apartment has a living room whose dimensions are 2.5 m 4.8 m 5.9 m. Assume that the air in the room is composed of 79% nitrogen (N2) and 21% oxygen (O2). At a temperature of 27°C and a pressure of 1.01 105 Pa, what is the mass (in grams) of the air?

20. ## math

John's account of 98.50 has been delinquent for 3 months. After 90 days office charges a 2% service charge, compounded monthly that is added to future bills. What would be the amount owed after 9 months? My math is 98.50 x 0.02 = 1.97 1.97 x 12 months =

21. ## Math

we need to fence off a rectangular section of land in order to make some huge play pens. All four sides will be fenced and there will also be 2 parallel fence lines inside the perimeter in order to make 3 identical fields. If we have 2600 meters of

22. ## biology

1. Explain the problems that growth causes for cell 2. Describe how cell division solves the problem of cell growth

The probability of any outcome cannot be larger than which number? A) 0 B) 0.5 C) 1 D) 10

24. ## Probability

Two group of male students cost their past on a particular proposal.the result are as follows: Group infavour against A 128 32 B 96 48 if a student in favour of proposal is selected for a post. What is the probability that he is from group A ? if a student

25. ## math

An advertisement states that 8 thermometers cost 12.42 minus a 3% disc. Dr. wants to order a dozen to take advantage of the savings sales tax is 5%. What would the cost be? I divided 8 into 12.42 wich gives you 1.55 per thermometer 1.55 x 12 thermometers =

26. ## math

put these in order from least to greatest. 0.145,0.15,0.155,0.1 1/12,0.12,1/20,0.20,1/6,0.6,0.06,0.16 Can someone please help me somehow a tip would be more useful than the answer though

28. ## Physics

An ideal gas at 6.0°C and a pressure of 1.92 105 Pa occupies a volume of 2.10 m3. (a) How many moles of gas are present? moles (b) If the volume is raised to 4.60 m3 and temperature raised to 30.5°C, what will be the pressure of the gas? Pa I used the

29. ## Algebra 2 (probability)

Sara has 5 flower pots with a unique flower. The pots are arranged along a line. One day she decided to change their order the condition that no pots that were originally next to each other remain next to each other. Find out the number of possible orders

30. ## Microeconomics: Budjet Constraint

You have decided to eat sushi for lunch and have a grand total of \$20 to spend. Whatever money you have left over from buying sushi rolls will be spent on cans of soda to get you through the rest of the day. Your problem is to choose the best combination

31. ## Verbal reasoning

which words among the three (Rapid;jump and fly) are best opposite in to these three words: Slow;crawl and fly ?

32. ## math

Several studies have been conduct on the effectiveness and safety of the H1N1 influenza vaccine. One study found that in a group that received the actual medication, the drug was 87% effective. In a group that received a placebo, there was 10% effective

33. ## math

please solve using the multplication principle -x/9=1/6

34. ## math

Please explain this exercise and give answer y = 13+x, for x

35. ## math

44 more thatn Q algebraic expression

36. ## Math

Two group of male students cost their past on a particular proposal.the result are as follows: Group infavour against A 128 32 B 96 48 if a student in favour of proposal is selected for a post. What is the probability that he is from group A ? if a student

38. ## Math

how do I find a equivalant expression without parentheses -y(y-25)=

39. ## math

Using taylor series solve lim x→0 ((sin^-1 6x)-(sin 6x))/((tan^-1)(6x)-(tan 6x) I don't know how to start this problem

40. ## PIMA

Calculate Cholestyramine 20% ointment to make 100 gm. Base: Petroleum

41. ## crt 205

final project topic: American Patriotism is Alive and Well

42. ## statistics

Two group of male students cost their past on a particular proposal.the result are as follows: Group infavour against A 128 32 B 96 48 if a student in favour of proposal is selected for a post. What is the probability that he is from group A ? if a student

43. ## Phi103

What is the truth value of the sentence "P v ~ P"? (Points : 1) True False Cannot be determined Not a sentence 2. One of the disadvantages of using truth tables is (Points : 1) it is difficult to keep the lines straight T's are easy to confuse with F's.

45. ## math

translate the phase to an alegebraic expression; John has \$30.00 before spending N dollars on food how much money remains?

47. ## smitty

is 8m cubed - 25 prime?

48. ## math

when solving using multiplication principle -13x=273 how do i solve plus perform check

49. ## math

So is -(y-25) is an equivalant expression without parentheses =25y

50. ## math

supplies on invoice are 4 bottles alcohol @ 2.25 each = 9.00 3 thermometers @ 1.95 each = 5.85 6 boxes cotton @ .29 each = 1.74 6 bottles mouthwash @ .89 = 5.34 11 crtns cotton swabs @ .39 each = 4.29 3 hypo needles @ .39 each = 1.17 Dr. receives 3% disc,

52. ## Math

Two group of male students cost their past on a particular proposal.the result are as follows: Group infavour against A 128 32 B 96 48 if a student in favour of proposal is selected for a post. What is the probability that he is from group A ? if a student

54. ## Math

4/3 x (4/3) If you multiply what would it be please show steps and answer

56. ## math

can you help me to find an equivalant expression without parentheses -(y-25)

57. ## Math

I do not understand please explain for me solve for the indicate letter x=13+x, for x the solution is x =

-94+(-19)

59. ## Physics

An engine has an efficiency of 61% and produces 7900 J of work. Determine each of the following. (a) the input heat J (b) the rejected heat J

60. ## science

calculate the osmotic pressure at 18.5 degree celcuis of a suspension containing 30g/L of solid particles. each particle weighs 10^-9g.

61. ## math

determine the equation of a circle that has its center a (0,0) and passes through each point. a)(6,-3)

63. ## mathematics

-(x-4)(x-1)+5(3x-1)(2x+1) expand and simplify

THIS IS WRONG

posted on January 15, 2020
2. ## math

I want to see the answer

posted on July 4, 2019
3. ## Life orientation

Nna ke nyaka mosadi eng dikarabo

posted on April 22, 2019
4. ## Life orientation

Mogweta lena ahh la borah .....kgane u want us to fail

posted on April 21, 2019
5. ## algebra

Seven more than the product of 10 and Carlos's age Use the variable c to represent Carlos's age

posted on February 16, 2019
6. ## language arts

100% Correct A C D

posted on January 16, 2018
7. ## language arts

OMG He's correct thank you so much A C D

posted on January 16, 2018
8. ## Chemistry

Determine how many grams of CO2 are produced by burning 1.01 g of C4H10.

posted on October 14, 2017
9. ## Agriculture

why is agriculture referred to as the nerve centre of the nation

posted on August 8, 2017
10. ## Math

Okay.Thank you!

posted on June 20, 2017
11. ## Math

posted on June 20, 2017
12. ## math

I don't get this problem...

posted on October 11, 2016
13. ## Math

40.80

posted on February 15, 2014
14. ## Algebra

96

posted on February 8, 2014
15. ## math

228.29056

posted on February 13, 2013
16. ## crt 205

American Patriotism is Alive and Well

posted on November 24, 2012
17. ## math

would you show me how you solved -110/11

posted on November 20, 2011
18. ## math

10

posted on November 20, 2011
19. ## math

How did you come up with (1.02)

posted on May 9, 2010
20. ## Microeconomics: Budjet Constraint

To be more clear, (20,0) to (7,0)

posted on August 7, 2009
21. ## Microeconomics: Budjet Constraint

Sorry I should have said that fractional sushi rolls and cans of soda are possible. What I was thinking was, with soda on the vertical axis and sushi on the horizontal axis, we have a horizontal line at \$7 on the vertical axis. So basically a straight line

posted on August 7, 2009
22. ## biology

Whats "SA to V ratio"?

posted on December 1, 2008
23. ## Physics

that's what I have been working and keep coming up with either two answers 9.29 or 9.29 * 10 ^10 and the computer is telling me its wrong I don't know what else to do. Maybe I'm computing the number wrong.

posted on April 11, 2008