Johnson
Popular questions and responses by Johnson
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
asked on November 11, 2013 
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
asked on December 1, 2014 
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
asked on February 27, 2013 
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
asked on March 12, 2012 
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
asked on September 29, 2013 
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
asked on September 29, 2013 
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
asked on May 3, 2016 
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)
asked on April 15, 2012 
Physics
Use scale drawing method: If a man travels 7km 30degree east of north,then 1okm east,find the resultant displacement
asked on September 23, 2018 
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
asked on April 18, 2008 
Phyics
A 1390N uniform beam is attached to a vertical wall at one end and is supported by a cable at the other end. A 1960N 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
asked on November 10, 2013 
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.
asked on April 15, 2016 
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
asked on April 11, 2008 
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 2.00 103 m3. Determine the work done (including algebraic sign) in each segment
asked on April 20, 2008 
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?
asked on June 20, 2017 
Further Mathematics
The first term of a g.p is 7 while the common ratio is 3.find the 11th term.
asked on February 8, 2017 
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
asked on April 11, 2008 
algebra
10 and Carlos's age Use the variable c to represent Carlos's age.
asked on February 16, 2019 
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?
asked on April 20, 2008 
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 =
asked on May 9, 2010 
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
asked on February 24, 2011 
biology
1. Explain the problems that growth causes for cell 2. Describe how cell division solves the problem of cell growth
asked on December 1, 2008 
adv algebra
The probability of any outcome cannot be larger than which number? A) 0 B) 0.5 C) 1 D) 10
asked on September 14, 2015 
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
asked on February 4, 2012 
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 =
asked on May 9, 2010 
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
asked on November 17, 2010 
Analytical Chemistry
advantages and diaadvantages of potentiometris titration
asked on June 10, 2010 
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
asked on April 20, 2008 
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
asked on July 26, 2015 
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
asked on August 6, 2009 
Verbal reasoning
which words among the three (Rapid;jump and fly) are best opposite in to these three words: Slow;crawl and fly ?
asked on February 6, 2016 
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
asked on July 14, 2015 
math
please solve using the multplication principle x/9=1/6
asked on November 19, 2011 
math
Please explain this exercise and give answer y = 13+x, for x
asked on November 19, 2011 
math
44 more thatn Q algebraic expression
asked on November 17, 2011 
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
asked on February 4, 2012 
math
Please divide if possible 110/11
asked on November 20, 2011 
Math
how do I find a equivalant expression without parentheses y(y25)=
asked on November 19, 2011 
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
asked on November 23, 2015 
PIMA
Calculate Cholestyramine 20% ointment to make 100 gm. Base: Petroleum
asked on September 28, 2015 
crt 205
final project topic: American Patriotism is Alive and Well
asked on November 24, 2012 
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
asked on February 4, 2012 
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.
asked on December 12, 2011 
math
please help me solve by multiplication principle; x/9=1/16
asked on November 19, 2011 
math
translate the phase to an alegebraic expression; John has $30.00 before spending N dollars on food how much money remains?
asked on November 19, 2011 
Math
please help me to solve this problem 2 x(7)x (9)
asked on November 19, 2011 
smitty
is 8m cubed  25 prime?
asked on January 31, 2013 
math
when solving using multiplication principle 13x=273 how do i solve plus perform check
asked on November 19, 2011 
math
So is (y25) is an equivalant expression without parentheses =25y
asked on November 19, 2011 
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,
asked on May 9, 2010 
math
state the corrdinates of the centre of the circle described by the equation. x^2+y^2=R^2 please help!
asked on March 16, 2014 
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
asked on February 4, 2012 
math
please simplify 16/9
asked on November 20, 2011 
Math
4/3 x (4/3) If you multiply what would it be please show steps and answer
asked on November 20, 2011 
math
please simplify [55(24)]
asked on November 19, 2011 
math
can you help me to find an equivalant expression without parentheses (y25)
asked on November 19, 2011 
Math
I do not understand please explain for me solve for the indicate letter x=13+x, for x the solution is x =
asked on November 19, 2011 
math
94+(19)
asked on November 17, 2011 
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
asked on April 18, 2008 
science
calculate the osmotic pressure at 18.5 degree celcuis of a suspension containing 30g/L of solid particles. each particle weighs 10^9g.
asked on August 5, 2015 
math
determine the equation of a circle that has its center a (0,0) and passes through each point. a)(6,3)
asked on March 16, 2014 
math
please help me solve and explain the answer 96+(100)+773+(297)+10+(251)
asked on November 19, 2011 
mathematics
(x4)(x1)+5(3x1)(2x+1) expand and simplify
asked on March 23, 2014

Math Help please Check my answer
THIS IS WRONG
posted on January 15, 2020 
math
I want to see the answer
posted on July 4, 2019 
Life orientation
Nna ke nyaka mosadi eng dikarabo
posted on April 22, 2019 
Life orientation
Mogweta lena ahh la borah .....kgane u want us to fail
posted on April 21, 2019 
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 
language arts
100% Correct A C D
posted on January 16, 2018 
language arts
OMG He's correct thank you so much A C D
posted on January 16, 2018 
Chemistry
Determine how many grams of CO2 are produced by burning 1.01 g of C4H10.
posted on October 14, 2017 
Agriculture
why is agriculture referred to as the nerve centre of the nation
posted on August 8, 2017 
Math
Okay.Thank you!
posted on June 20, 2017 
Math
Hi Ms. Sue. Thanks for your reply/answer. About this question from the above problem: "How tall will the plant be in two weeks from now?" How can this be solved? Thanks!
posted on June 20, 2017 
math
I don't get this problem...
posted on October 11, 2016 
Math
40.80
posted on February 15, 2014 
Algebra
96
posted on February 8, 2014 
math
228.29056
posted on February 13, 2013 
crt 205
American Patriotism is Alive and Well
posted on November 24, 2012 
math
would you show me how you solved 110/11
posted on November 20, 2011 
math
10
posted on November 20, 2011 
math
How did you come up with (1.02)
posted on May 9, 2010 
Microeconomics: Budjet Constraint
To be more clear, (20,0) to (7,0)
posted on August 7, 2009 
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 
biology
Whats "SA to V ratio"?
posted on December 1, 2008 
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