07/07/19

Calculate the pH of the solution formed when 20.0mL of 20.0 M NaOH is added to 20.0mL of 0.20M acetic acid (Ka=1.8x10^-5).
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07/04/19

Integral, At what value of t does the local max of f(t) occur?
GivenIntegral (a=0.b=t) [(x^2+11x+18)/(1+cos^2(x)]dx At what value of does the local max of occur?
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07/01/19

Find the slope of the graph of the equation at the given point?
x^2y + y^3x = -6 Given point: (2,-1)
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06/26/19

Help Chemistry:(
A 151.1-g sample of a metal at 74.3°C is added to 151.1 g  H20 at 14.8°C. The temperature of the water rises to 18.6°C. Calculate the specific heat capacity of the metal, assuming that all the heat... more
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06/26/19

Two cyclists leave towns 120km apart at the same time and travel toward each other. One cyclist travels 8 /kmh faster than the other. If they meet in 3 h
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06/19/19

Find the volume of the solid that lies within the sphere x^2+y^2+z^2=16, above the xy plane, and outside the cone z=2sqrt(x^2+y^2).
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06/18/19

Which is the equation of a parabola with vertex (0, 0), that opens to the left and has a focal width of 12?
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06/18/19

The number of real values of k for which the system of linear equations 2x+4y-kz=0,4x+ky+2z=0,kx+2y+2z=0 has infinitely many solutions is ...
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06/18/19

An apparent paradox in simple kinematics
Among the "Big Five" equations of kinematics is:Vf2 = Vi2 + 2 aΔXTaking this equation at its "face value", it would imply that when Vf = Vi the acceleration has to be 0 or the ΔX is zero. But if... more
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06/17/19

valuate the triple integral ∭xydV where the region is the solid tetrahedon with vertices (0,0,0), (6,0,0), (0,10,0), (0,0,9)
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06/11/19

if p = secA - tanA and q = cosecA + cotA. Then what is q in terms of p.
I have been given four options.1) p+1/p-12)1+p/1-p3)p-1/p+14)1-p/1+pI would appreciate the help.
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06/07/19

how do i solve 4sec(x)+8=0

I know i have to isolate the variable, and when i do that i get sec(x)= -2 but i dont know where to go from there.
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06/06/19

Why is the square of the diameter of a wire inversely proportional to its resistance?
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05/29/19

As the space shuttle orbits the Earth, the shuttle and the astronauts accelerate towards the earth with the same acceleration. What effects does this create?
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04/12/19

Why are a motorcycle's front brakes more effective than back?
I've noticed that when I apply the front brakes on my bike it stops quite quickly. If I apply the back brakes at the same speed, it skids rather than stopping quickly. Why?
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10/14/18

What is the value of the charge on an ion with 4 protons and 2 electrons?
Chemistry Ions and determining the charge
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10/14/18

Physics homework

A plane drops a hamper of medical supplies from a height of 5620 m during a practice run over the ocean. The plane’s horizontal veloc- ity was 110 m/s at the instant the hamper was dropped.What is... more
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10/01/18

Area of a Triangle
Find the area of a triangle bounded by the x-axis, the line f(x)=7−9/5x, and the line perpendicular to f(x) passing through the origin.
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09/27/18

Trigonometry question
Why if sin(x)=8/5*cos(x/2) then     sin(x/2)=4/5 is wrong
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09/17/18

Trigonometry
sin (n + 1)x sin (n + 2)x + cos (n + 1)x cos (n + 2)x = cos prove it
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09/15/18

Two mechanics worked on a car. The first mechanic worked for 20 hours, and the second mechanic worked for 15 hours. Together they charged a total of $2525
Two mechanics worked on a car. The first mechanic worked for 20hours, and the second mechanic worked for 15hours. Together they charged a total of $2525. What was the rate charged per hour by each... more
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09/15/18

physics question
A ship sails 30 kilometers 70 degrees north of east. It then turns 110 degrees to the west, giving it a new heading of 0 degrees north of west.After sailing another 30 kilometers, how far is the... more
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08/20/18

limit x tends to 1 (1-x2)^1/log(1-x)
answer -e
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08/17/18

Find sin(theta) if cos (theta) = fraction numerator 4 square root of 3 over denominator 7 end fraction
thsi math prbolem is hardjojpojpojojojojo
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08/07/18

find the concavity of y'=4y-y^3
 I cant find the concavity of this function but I found the increase/decreae and everything else.
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