Saturday
December 10, 2016

Posts by Samuel

Total # Posts: 264

physics
(1) a car travelling at a constant speed of 20ms-1 overcomes a constant frictional resistance of 300N. What is the horse power of the engine? ( take 1h.p = 3/4 kw)
November 21, 2016

Physics
A tennis ball is thrown with a velocity of 30m/s at an angle of 60^ of the horizontal calculate the time,m/s,and the range
November 9, 2016

English Beowulf
Thank you! Yes I need to narrow it down. This professor gets on my nerves.
October 31, 2016

English Beowulf
How did the culture of Beowulf view pride? Why?
October 31, 2016

Physics
The density of copper is 9.8 kilograms per meter cube and the density of gold is 1.9 kilograms per meter cube. When two wires of these metals are held under the same tension, the wave speed in the gold is found to be half that in the copper wire. What is the ratio of the ...
October 8, 2016

maths sir-reiny help calculus
solve the differential equation (x^2-xy+y^2)dy-xydx=0 plz show me working
October 1, 2016

calculus help me pllllllllllz
so what do i do from here now sir
September 26, 2016

calculus help me pllllllllllz
Find out what kind of improper integral is given below §dx/{x^4+4}....?,hence evaluate the integral with upper boundary=infinity lower boundary =0 i need help plz show me full work
September 26, 2016

maths need help
the transverse of the conic:3x^2-y^2+2y-1=0 is ???
September 25, 2016

science
A concave lens or focal lens 10cm produce an erect image 40cm from the lens .Determine the object distance and magnification.
August 30, 2016

Probability
Find the probability that a committee of 10 people chosen from an organization consisting of 40 doctors and 35 dentists will include 3 doctors and 7 dentist. 40c10 + 35c10 not sure what to do after setting it up. Need help
June 24, 2016

Chemistry
In the zinc-copper cell, Zn(s) | Zn^+2(1M) || Cu^+2(1M) | Cu(s), which electrode is negative? Cu^+2 Cu(s) Zn(s)*** Zn^+2
May 31, 2016

Chemistry
What is the oxidation half reaction for the following equation: Cr2O7^-2 +Fe+2 - - > Cr^+3 + Fe^+3 Cr^+3 - - > Cr2O7^-2 Fe^+2 - - > Fe^+3 Fe^+3 - - > Fe^+2 Cr2O7^-2 - -> Cr^+3***
May 31, 2016

Chemistry
What is the reducing agent in the following reaction? 2K + S - - > K2S K*** S K2S None of these
May 31, 2016

physics
A piece of copper of mass 40 grams at 20 degrees Celsius is placed in a copper calorimeter of mass 60 grams containing 50 grams of water at 10 degrees Celsius .ignoring heat losses,what will be the final steady temperature after stirring?(specific heat capacity of copper and ...
May 29, 2016

calculus-help.. .Me
if y=e^(-kt)[Acosh(qt)+Bsinh(qt)] where A,B,q and k are constant show that d^2y/dt^2+2kdy/dt+(k^2-q^2)y=0 step plz thanks
May 24, 2016

expansion help
find the series of the expansion (1+(1/x^3)) help!!!!
May 21, 2016

physic
Two forces of magnitude 4.ON ans 7.0N act on a small object b. The angle btw the direction along which the force is 50 degree.determine the magnitude *nd direction of d resultant force on d body b.
May 15, 2016

physic
Two forces 5N and 10N act on a body in the direction due North and east respectively at an angle 75 degree. Calculate the resultant force of the inclined angle.
May 15, 2016

chemistry
what will haprn if ammonium chloride solution is used to standardize potassium tetraoxamaganate VII solution instead of ammonium iron II sulphate
May 11, 2016

calculus help
integrate:dx/(3x^3-5)^3 help plz show step
May 6, 2016

calculus plz help me
Sir it won,t solve it for me i tried it....i don,t even no how to use it...plz help me
May 5, 2016

calculus plz help me
integrate:dx/((x-1)sqrt(x^2-2) plz show solution i plead
May 5, 2016

Economics!
Suppose a chemical company is in a perfectly competitive industry and has a short run total cost curve of TC = q3 + 5q2 + 10q + 10 and a short run marginal cost of SMC = q2 + 10q + 10. At the price of 49, how many will be produced?
May 4, 2016

Economics
Use the demand curve to derive MR. NOTE: MR is always two times steeper than the demand curve if the equation is linear. Hence, MR=$500-20Q. Use MC=MR 100=500-20Q 20Q=400 Q=20 P=500-10(20)=400. Profit per day= There's no AC so I can't locate it. In terms of tax. If it ...
May 3, 2016

economics managerial
Profit maximizing can be achieved using this formula MC=MR. Differentiate TR to get MR= 5000-10Q Differentiate TC to get MC=6Q 5000-10Q=6Q >> Q=312.50 Use the Q to get TR and TC. To find total profit= TR-TC.
April 20, 2016

math
calculate the volume of the solid when the composite of a cube of edge is 28cm and the square -based pyramid of it height is 16cm
April 18, 2016

math
p=5x3^n can you answer this
April 13, 2016

math
but i don't know how
April 11, 2016

math
make a table and graph each quadratic function. use integers from -3 to 3 inputs 1. y=-x^2 2. y=2x^2 3. y=-8x^2 4. x^2 + 2
April 11, 2016

Probability
The letters in the word MATHEMATICS are arranged randomly. What is the probability that the first letter is E? Preview What is the probability that the first letter is M?
March 25, 2016

Probability
26*25*10*9*8*7*6*5*4= 393120000
March 25, 2016

Probability
A computer password is required to be 9 characters long. How many passwords are possible if the password requires 2 letter(s) followed by 7 digits (numbers 0-9), where no repetition of any letter or digit is allowed?
March 25, 2016

english,maths,chem,phy,bio,agric,civic,etc
What are the equations of motion.
March 13, 2016

life orientation
indetify three courses are interested after grade 12
March 13, 2016

Math
How do i solve for b. 5=2pi/b
March 4, 2016

Math
A sin B (x +- C) d How do i find each letter?
March 2, 2016

Math
How do i find out the sin and cos equation of a sinusoidal graph?
March 2, 2016

Math
How do i find "d" and "c" values in y=cos(x+(pi/2)) Base equation is y= A cos B (x +- C) +- D
March 2, 2016

Math
Yes unclear
February 29, 2016

Math
How do i find the asymptotes of: y=(1/x-4)+3
February 29, 2016

chemistry
Mass=moles/atomic mass of fe2o3
February 26, 2016

Math
How do i find asymptotes without graphing?
February 26, 2016

Physics
How much heat is absorved when a temparature of a piece of iron of mass 0.1kg and specific heat capacity 2*10 rest to power of 2 J/kg/k is rise from 25degree celcius to 75degree celcius
February 20, 2016

physics
A stone of mass 0.7kg is projected vertically upward with a speed of 5m/s.calculate the maximum height reached. [Take g=10m/s^2 and neglect air resistance]. "
February 13, 2016

Science
these are correct
February 1, 2016

COMPUTERS
CALCULATE THE AREA OF CIRCLE OF RADIUS 2CM USING FORTRAN PROGRAMMING LANGUAGE
January 30, 2016

Science
A compound on analysis as 87:8% c,12:2%h determine its empirical formular&molecular formular given mass=56gmol
January 25, 2016

Chemistry
A compound on analysis as 87:8% c,12:2%h determine its empirical formular&molecular formular given mass=56gmol
January 25, 2016

calculus
Find the minimum distance between the curves y=e^x and y=lnx. Hint: Use the fact that e^x and lnx are inverse relationships. I have no idea where to start. Thanks!
January 18, 2016

math
The perimeter of a rectangular concrete patio is 38 meters. The area is 90 square meters. What are the dimensions of the patio?
January 14, 2016

math
the horizontal,vertical and diagonal columns and rows of a magic square all add to the same sum.use the digits 1-16 one time each to make a magic square
January 14, 2016

physics
a car which weight is 1000N is travelling at 90kmn/hr and come to rest in a distance of 50m after applying the brakes. assume uniform acceleration, calculate how large its stopping force was exerted by the friction between the wheel and the road.
December 16, 2015

Math
a 6.5 ounce can of tuna for $1.39 or a 3 ounce can of tuna for $0.65. the 6.5 ounce can of tuna costs ________ the 3 ounce can of tuna costs __________ the ______ ounce can of tuna is the better buy
December 9, 2015

Science
10 b
December 9, 2015

logics in programming
for A=1 to 30
December 9, 2015

Physics
7.6 x 10^3
November 15, 2015

Elective maths
A particle P of mass 7kg is suspended by two inextensible strings AP,BP of lengths 40cm and 75cm respectively. The ends, AP of the strings are attached to two point at the same level, whose distance apart is 85cm. Find angle APB and the magnitude of the tensions in the strings...
October 6, 2015

physics sl
A dead dog of mass 2.2 kg and an initial speed of 5.5 m.s-1 slides along a rough horizontal surface and stops after travelling 4.2 m. calculate the frictional force between the dog and the surface (Think of the work the friction has to do to stop the dog – the Ek of the ...
October 4, 2015

math
What are the steps to show the quotient in simplest form? 0.000027/0.000009
September 30, 2015

math
A certain computer can perform 10^5 calculations per second. how many calculations can it perform in 10 seconds
September 30, 2015

MATH PROBABILITY
Suppose a flashlight manufacturer determined that 2 out of every 50 flashlights are defective. What is the probability that an inspector finds that the first defective flashlight is the 5th one tested? The 12th one tested?
September 17, 2015

Chemistry
I cant for the life of me figure out how to complete this question as our teacher hasn't properly gone over this section.
September 11, 2015

Chemistry
If an aquarium tank holds 100 litres of water, calculate how much heat energy would be required to heat the tank from 18.2 Degrees(C) to 32 Degrees(C)
September 11, 2015

Chemistry
The solubility of potassium nitrate at 20¡ãC is 340g/litre. How many grams of KNO3 can dissolve in 185ml of water?
September 7, 2015

mathematics
A man takes a 500km trip in his car, He rotates his tyres (four on the car and one spare) so that in the end of the trip each tyre has been used for the same number of kilometres. How many kilometres did each tyre cover?
August 28, 2015

Maths
141,386
August 24, 2015

English
In Fahrenheit 451, what pages are these words found on? I really need help just with this. It would be nice to help me out. Here are the words. Part 1: Abruptly, intact Part 2: certitude, darkling, dispersing, linguists, moor, televisors Part 3: scuttling
July 12, 2015

Science
4g of an organic compound gave 2.34g of carbon 0.16g of hydrogen 0.46g of nitrogen 1.04g of oxygen.what is the empirical formula
June 22, 2015

PHYSICS
gn elastic cord can be stretched to its elastic limit by a load of 2N. if a 35cm length of the cord is extended 0.6cm by a force of 0.5N, what will be the length of the cord whem the stretching force is 2.5N
May 28, 2015

Life oriantetion
For 5 interview questions
May 11, 2015

physics
force=m*a 4000-300=3m/s2*m m=1233.33kg
April 8, 2015

math
During the summer holidays,your brother earns extra money mowing lawns.He mows 6 lawns an hour and has 21 lawns to mow.How long will it take him?
April 7, 2015

math
A diver on a platform 40 feet in height jumps upward with an initial velocity of 5ft/s. His height in h feet after t seconds is given by the function h=-16t^2+5t+50. a. What is his maximum height? I got 50.39 b. How long will it take him to reach the surface of the water? h=-...
March 25, 2015

Math
I have the same problem as Marita. Can someone tell us what equation to use. Horizon has a cell phone plan for $28.00 per month plus $.30 per minute with unlimited anytime network minutes and a free flip phone for new customers. How do I put this in an equation. Sprint has a ...
March 8, 2015

physics
isolate for f 1/di = 1/f - 1/do show all the steps pls
February 8, 2015

physics
isolate for t s = ut + 1/2at^2 please show all ur steps  
February 8, 2015

physicss
state the precision of the measured quantities 1. 0.07 m 2. 908 s 3. 7.60 L 4. 0.005 0 mm answers: 1. 0.01 m 2. 1 s 3. 0.01 L 4. 0.0001 mm i do not understand this , please explain it to me
February 4, 2015

physics
noo the answer is 1g and 0.01cm
February 4, 2015

physics
state the precision of the measured quantities 1. 353g 2. 6.00cm please explain
February 4, 2015

algebra 1
a heavy freight train made a trip of 360 miles, running part of the distance at 54 miles an hour and the rest at 48 miles an hour. if the entire trip took 7 hours, find the distance traveled at each rate
February 2, 2015

physics
a force of 1600N is used to push a crate of brick at a rate of 40m/s squard. If the crate weights 150kg, how much do the bricks weight?
January 22, 2015

math
i got it its 11
January 21, 2015

math
WHAT????????????????
January 21, 2015

math
Camp Oaks gets 32 boxes of orange juice and 56 boxes o apple juice.Each shelf in the cupboard can hold 8 boxes of juice. What is the least number o shelves needed for all the juice boxes?
January 21, 2015

math
c is my best answer.
January 21, 2015

math
C??????????????????????????????????
January 21, 2015

math
FORGET ABOUT A, NOW I THINK IT IS B
January 21, 2015

math
There are 6 muffins in a package.How many packages will be needed to feed 48 people if each person has 2 muffins? A.4 B.8 C.16 D.24
January 21, 2015

math
If the wheel of a bicycle has a diameter of 60cm, calculate how far a cyclist will have travelled after the wheel has rotated 100 times.
January 15, 2015

Algebra
A. "Solve for w: (6w+1)/5≠2. Describe the solution in set notation." First I must find what number to substitute for "w" that WILL equal 2, correct? Then, determine the numbers that won't (I assume there will be far more of these)? What would be ...
January 14, 2015

Economics
Can someone help me with #1 - a,b,c it is on economics20145.weebly
December 11, 2014

English
''Nor was' is not necessary.
November 24, 2014

English
Yes, nor is a transition word.
November 24, 2014

English
Last Monday, Patrick Maloney was killed, but there were no suspects nor a murder weapon found.
November 24, 2014

int.science
True
November 24, 2014

science
'Imagine there is a tank of unknown gas that contains 53.31% carbon, 11.18% hydrogen, and 35.51% oxygen by mass. At 35.0 °C and 0.455 bar, 2.00 L of the gas has a mass of 3.20 g. Using this information, answer the following questions. a.) What is the empirical formula ...
October 27, 2014

science/math
I ncvvudvbsufdbfduwgbg,isuheurgiihdgilhgr and kill
October 14, 2014

science/math
F. Die udkler nv I. F,nib. K.rtb. Nothing hafb
October 14, 2014

math
The machining center at a production facility has three lathes of differing ages and thus precision. The oldest, machine A, produces finished units of product of which 88% are good, 8% are blemished, and 4% unusable. Machine B produces 92% good, 6% blemished, and 2% unusable. ...
September 12, 2014

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