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Questions Asked on June 27, 2014

A protein subunit from an enzyme is part of a research study and needs to be characterized. A total of 0.135g of this subunit
1. 2 answers
2. asked by Al
3. 5,572 views
One mole of titanium (6 1023 atoms) has a mass of 48 grams, and its density is 4.54 grams per cubic centimeter, so the
1. 1 answer
2. asked by hannah
3. 4,670 views
How much methane, in grams, must be burned to release 542 kJ of heat? H=-802kJ
1. 1 answer
2. asked by Luke
3. 3,232 views
the only car for him is one of those new GTO's.
1. 2 answers
2. asked by Anonymous
3. 2,901 views
integral: sqrt (16 + 6x − x^2)dx
1. 3 answers
2. asked by sam
3. 2,782 views
Suppose strontium-90 decays at a rate of 2 percent per year. (a) Write the fraction P of strontium remaining, as function of t,
1. 2 answers
2. asked by Anonymous
3. 2,781 views
The agricultural revolution marked a decisive turning point in human history. What evidence might you offer to support this
1. 5 answers
2. asked by tony
3. 2,696 views
Choice 1: Payments of $ 2600 now, $ 3200 a year from now, and $ 3880 two years from now.Choice 2: Three yearly payments of $
1. 2 answers
2. asked by Anonymous
3. 2,578 views
What is the total pressure, in atmospheres, of a 10.0 L container that contains 10 moles of nitrogen gas and 10 moles of oxygen
1. 1 answer
2. asked by Anon
3. 2,504 views
Two train cars are on a straight, horizontal track. One car starts at rest and is put in motion with a constant acceleration of
1. 2 answers
2. asked by #631
3. 2,402 views
A man walks 40m north then 30 m east and then 40 n south. Find the displacement from the starting point?
1. 3 answers
2. asked by jha
3. 2,100 views
a box contains 20 red,30 black,40 blue,50 white. what will be the minimum number of balls to be drawn without replacement so
1. 1 answer
2. asked by my era
3. 2,046 views
Fiona invested $1000 at 8% compounded continuously. At the same time Maria invested $1100 at 8% compounded daily. How long will
1. 1 answer
2. asked by Kendall
3. 1,963 views
Sam bought a new car for $26,500. The car depreciates approximately 13% of its value each year.A) What is the decay factor for
1. 1 answer
2. asked by jk
3. 1,552 views
A stone is projected up with a vertical velocity u, reaches upto a maximum height h. When it is at a height of 3h/4 from the
1. 1 answer
2. asked by fatimah
3. 1,472 views
A culture of bacteria grows exponentially. It doubles in size every 81 hours. How long will it take to triple from its original
1. 1 answer
2. asked by Anonymous
3. 1,384 views
Pretend the world's population in 1989 was 5 billion and that the projection for 2017 is 7.5 billion.What annual rate of growth
1. 1 answer
2. asked by Anonymous
3. 1,342 views
Six forces 9.81 N each acting at a point are coplanar. If the angles between neighboring forces are equal then the resulant is:
1. 2 answers
2. asked by jha
3. 1,275 views
A vector of magnitude 30 and direction eastwards is added with another vector of magnitude 40 and direction northwards. Find the
1. 2 answers
2. asked by jha
3. 1,256 views
Let vector a and b be two non-null vectors such that |vector a +b| =|vector a-2b| then the values of |vector a| / |vector b| may
1. 0 answers
2. asked by jha
3. 1,247 views
A block of mass 2.5 kg is pushed up against the vertical wall by a force of 60 N acting at 47◦ to the ceiling. The coefficient
1. 0 answers
2. asked by Kaylee
3. 1,192 views
a long jumper takes off at an angle of 20 degrees with the horizontal and reaches a maximum height of 0.55 meters at mid-
1. 1 answer
2. asked by kristen
3. 1,189 views
Calculate the freezing point and boiling point of a solution containing 14.8g of naphthalene (C10H8) in 120.0mL of benzene.
1. 2 answers
2. asked by Bama
3. 1,182 views
When 4.76 g of a solid mixture composed of NH4Cl and CaCl2 was dissolved in 100.0 mL of water, the temperature of the water rose
1. 4 answers
2. asked by Luke
3. 1,103 views
Barry heard in his Personal Finance class that he should start investing as soon as possible. He had always thought that it
1. 1 answer
2. asked by Peter
3. 1,078 views
Vector A is the length 2cm and 60° above the x-axis in the first quadrant. Vector B is of length 2cm and 60° below the x-axis
1. 2 answers
2. asked by jha
3. 1,076 views
A bicycle is turned upside down while its owner repairs a flat tire. A friend spins the other wheel, of radius 0.363 m, and
1. 1 answer
2. asked by Weiyi
3. 1,067 views
a man stands on the roof of a 15.0m tall building and throws a rock with a velocity of magnitude 30.0m/s at an angle of 33
1. 1 answer
2. asked by kristen
3. 1,038 views
Choice 1: Payments of $ 2600 now, $ 3200 a year from now, and $ 3880 two years from now.Choice 2: Three yearly payments of $
1. 0 answers
2. asked by Anonymous
3. 1,026 views
Find the volume of the parallelepiped having u = 3i - 5j + k , v= 2j and w= 3i + j + k as adjacent edges.
1. 1 answer
2. asked by nsomba
3. 987 views
What does the word mimetic tell us about the difference between novels and most of the literature of the 1800s?A. Novels present
1. 8 answers
2. asked by Unmei
3. 931 views
A soccer ball travelling at 15 m/s [E] bounces off of a goal post and ends up moving 12 m/s [S 30¡Æ E]. If the ball was in
1. 0 answers
2. asked by kevin
3. 916 views
A vector A points vertically downward and vector B points towards east, then the vector product vector A × vectorB is
1. 1 answer
2. asked by jha
3. 879 views
A bicycle is turned upside down while its owner repairs a flat tire. A friend spins the other wheel and observes that drops of
1. 2 answers
2. asked by Harley
3. 874 views
Redo problem 13 from section 1.8 of your textbook (page 62), but use the functions in the questions below rather than the
1. 1 answer
2. asked by Anonymous
3. 818 views
Suppose strontium-90 decays at a rate of 2 percent per year.(a) Write the fraction P of strontium remaining, as function of t,
1. 1 answer
2. asked by Anonymous
3. 815 views
A 75.00-g sample of an unknown metal is heated to 52.00°C. It is then placed in a coffee cup calorimeter filled with water. The
1. 1 answer
2. asked by adam
3. 807 views
Pretend the world's population in 1989 was 5 billion and that the projection for 2017 is 7.5 billion.What annual rate of growth
1. 0 answers
2. asked by Anonymous
3. 790 views
The digit sum for 126 is 1+2+6, or 9. The digit sum for 300 is 3+0+0, 0r 3.Find the two consecutive numbers that have digit sums
1. 2 answers
2. asked by Josh
3. 767 views
Suppose strontium-90 decays at a rate of 2 percent per year. (a) Write the fraction P of strontium remaining, as function of t,
1. 0 answers
2. asked by Anonymous
3. 753 views
1. What happens to the force required for an object to maintain circular motion if the period is halved (goes around twice as
1. 0 answers
2. asked by Liz
3. 742 views
A 2.73 kg particle has a velocity of vx = 6.02 m/s and vy = 0.316 m/s.Find the magnitude of its total momentum. Answer in units
1. 1 answer
2. asked by Kaylee
3. 727 views
divide and simplify the radical(3+ sqrt18)/4 sqrt12 I'm not sure how to conjugate the denominator?
1. 3 answers
2. asked by Emma
3. 717 views
A car is moving on a straight road due north with a uniform speed of 50km h^-1 when it turns left through 90°. It the speed
1. 1 answer
2. asked by jha
3. 698 views
A motorcycle is travelling at a constant acceleration in a straight line. When it passes by the first lamp post, it is
1. 1 answer
2. asked by Ashley
3. 686 views
1. A ball is launched from a cliff with an initial velcity of 10 m/s at an angle of 40 degrees above horizontal. If the ball
1. 2 answers
2. asked by Liz
3. 673 views
Hello! I am taking Calculus I and am in Sec. 4.3 of Stewart's 7th Edition. I ran across a problem that I don't understand the
1. 2 answers
2. asked by DeeDee
3. 668 views
If the line l has parametric equations x=5-3t, y=-2+t, z=1+9t, find the parametric equations for the line through p(5,4,-3) that
1. 0 answers
2. asked by malipa
3. 635 views
1. What happens to the force required for an object to maintain circular motion if the period is halved (goes around twice as
1. 0 answers
2. asked by Liz
3. 625 views
Nancy Tai has recently opened a resolving charge account with MasterCard. Her credit limits is $ 1,000, but she not charged that
1. 0 answers
2. asked by Peter
3. 625 views
The plane curve is given by the equation R(t)= ( ln sin t)i + ( ln cos t)j.find the unit normal vector to the curve t= ¤Ð/6.
1. 1 answer
2. asked by sibongile
3. 622 views
it is required to find a rational number which is equal to the recurring decimal number 0.327327327...,(a)find the value of
1. 1 answer
2. asked by elizabeth
3. 618 views
Mr.Carter worked many hours last week overtime - his pay tripled and he received an additional $700.What is his usual and normal
1. 3 answers
2. asked by Dire
3. 613 views
Given: vector a+b+c= 0. Out of the three vectors a,b and c two are equal in magnitude. The magnitude of the third vector is √2
1. 1 answer
2. asked by jha
3. 611 views
a) In order to express the function y = 1311 x − 4, as a composition of two functions the outer of which is an exponential
1. 0 answers
2. asked by Anonymous
3. 610 views
Use the definition of limits to show thatLim x➡ 0 : (x^2 - 9) / (x + 3) = -6 hence find the number d > 0 given that e=0.05
1. 1 answer
2. asked by Maggie
3. 606 views
A coin with a diameter of 1.90 cm is dropped on edge onto a horizontal surface. The coin starts out with an initial angular
1. 0 answers
2. asked by Ryan
3. 603 views
how might life be different if static friction did not exist? give three examples and reference formulas to support your answers
1. 0 answers
2. asked by Liz
3. 600 views
construct a 95% confidence interval estimate for the population mean MPG of 2010 family sedans, assuming a normal distribution.
1. 1 answer
2. asked by lou
3. 587 views
how might life be different if static friction did not exist? give three examples and reference formulas to support your answers
1. 0 answers
2. asked by Liz
3. 579 views
Show that the limit does not exist for the functionLim (x,y)➡(1,-2): (4x^3y^2 - 2xy^5+ 7y-1)/ ( 3y-y^4 + 3x^3)
1. 0 answers
2. asked by sikangele
3. 568 views
The sales goal for your store this week $22,682. The sales goal for your store this week last year was $20,128. Your store has
1. 2 answers
2. asked by Anonymous
3. 564 views
How much heat (in kilojoules) is liberated by the combustion of 7.01 g of magnesium? Include the sign in your answer. H+-1203kJ
1. 1 answer
2. asked by Luke
3. 553 views
Solve the following differential equations:(I). Cos x dy/dx + ysin x= sec^2 x (II). Y"-10y' + 41y=0
1. 0 answers
2. asked by mitesh
3. 550 views
1. A ball is launched from a cliff with an initial velcity of 10 m/s at an angle of 40 degrees above horizontal. If the ball
1. 1 answer
2. asked by Liz
3. 548 views
The insight bus tour offered to take a group of senior citizen to a lake resort for a fare of $120 per person if 25 person or
1. 1 answer
2. asked by farid
3. 548 views
The insight bus tour offered to take a group of senior citizen to a lake resort for a fare of $120 per person if 25 person or
1. 1 answer
2. asked by farid
3. 526 views
Find the equation of a straight line which passes through the point P(3,1,-2) and is perpendicular to the planes L1 and L2,
1. 1 answer
2. asked by mweemba
3. 524 views
If A=B+C and the magnitude of A,B.C are 5,4,3 units then angle between A and C is ?
1. 1 answer
2. asked by Ashish
3. 516 views
The heart of Martin v. Hunter’s Lessee was
1. 1 answer
2. asked by linda
3. 511 views
Traditional africam marriege is an advantage to man only not than female?plz smbody help with a paragraph
1. 2 answers
2. asked by Njabulo
3. 507 views
abby has a ribbon that was 1 meter long..she cut off 25 centimeters..how long is the ribbon now??
1. 2 answers
2. asked by abigail
3. 502 views
a box contain contains 50 colours, 24 are red, 17 are blue and 9 are whites. draw a tree to represent the situation.
1. 1 answer
2. asked by pretty
3. 488 views
If z=xy f(x/y), show that x dz/dx + y dz/dy = 2z
1. 0 answers
2. asked by Gerry
3. 482 views
A square picture 3 1/2 feet wide hung on the wall.The center of it is to be 4 feet from the ceiling. The top picture is __ feet
1. 8 answers
2. asked by Dire
3. 475 views
what is the integral of sin^5(6x)dx
1. 1 answer
2. asked by walter
3. 468 views
By December 2014, your organization had an establishment of 500 employees when it decided to expand its operations because of
1. 0 answers
2. asked by zennzo
3. 466 views
Solve the differential equationx^2dy+ (x-3xy + 1)=0
1. 0 answers
2. asked by musonda c
3. 461 views
I need help solving this equation. 7y+5/3 = -8/y-3. I am stuck. please help me.
1. 1 answer
2. asked by Maria
3. 454 views
Evaluate1. Lim x➡ 0 : ( 4^x + 3^x - 2)/ 4x 2. ^_+Lim x➡ infinite: (1+1\x)^2
1. 1 answer
2. asked by martha g
3. 453 views
To have a high work effiency of concrete batching plant,we need to know the maintance of it to extend its useful life.We have
1. 1 answer
2. asked by hao
3. 449 views
75% * 80% of the total price is 900,000, what is the total price?
1. 9 answers
2. asked by Dir
3. 447 views
What happens to potential energy during melting
1. 0 answers
2. asked by Ashley
3. 437 views
Evaluate the following integral1. (^3 - 4x^2 -15x + 15) / (^2 - 2x -8) 2. X^3 / cube root (x^2 + 4)dx
1. 1 answer
2. asked by Joe
3. 430 views
For f(x,y)= 3 - x^2 +2x -y^2 - 4, find all critical points of f and determine their nature.
1. 0 answers
2. asked by Brian m
3. 422 views
What's 25 inch by 12 1/2
1. 1 answer
2. asked by James
3. 408 views
Share 7m in the ratio 32:3
1. 1 answer
2. asked by Anonymous
3. 379 views
5,7,10,15,22, WHAT COMES NEXT?
1. 2 answers
2. asked by AALI
3. 374 views
find if 6 boxs are there.they each having 60,30,20 and 15 coins, how much next two
1. 1 answer
2. asked by MH Saha
3. 371 views
If u =(x^2 + y^2)/(x + y), find the constant k such that x dy/dx + y du/dy = k
1. 0 answers
2. asked by lweendo
3. 365 views
Integrate 1/(x^2 square root ( 16 - x^2) dx
1. 0 answers
2. asked by swala
3. 365 views
1/1*2 + 1/2*3 + 1/3*4 + 1/4*5 + 1/5*6 + 1/6*7 = ?I need help It has to be a fraction too :(
1. 1 answer
2. asked by Dire
3. 365 views
Find the points on the graph of the equation y= x^4 -12x^2 which the curvature is 0.
1. 0 answers
2. asked by chibale
3. 362 views
If u = ln (x^2 + y^2)/(x + y), find the constant k such that x dy/dx + y du/dy = k
1. 1 answer
2. asked by phiri
3. 357 views
If u=(x^2+y^2+z^2)^-1/2find the integer value of k given that (d^2u/dx^2)+(d^2/dy^2)+ (d^2u/dz^2)=k
1. 0 answers
2. asked by stabile
3. 355 views
find if 6 box have.they each having60,30,20 and 15 what next two
1. 1 answer
2. asked by Anonymous
3. 343 views
If a*b=2a+b such that 2*3=2(2)+3,find (i) b when 3*b=b*5(ii) d when d*(3*d)=(d*3)*d
1. 1 answer
2. asked by Nicole
3. 319 views
140
1. 0 answers
2. asked by Anonymous
3. 310 views

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