# Posts by Zen

Total # Posts: 16

**MATH**

Two poles are 24 metres and 30 metres high and 20 metres apart. A slack wire joins the tops of the poles and is 32 metres long. A cable car is moving along the wire at 5 metres per second away from the shorter pole. When the car is 12 metres horizontally from the shorter pole...

*October 18, 2016*

**MATH**

The answer are 9.26 in/hr and 13.33 in/hr

*October 18, 2016*

**MATH**

The upper chamber of an hour-glass is a cone of radius 3 inches and height 10 inches and, if full, it requires exactly one hour to empty. Assuming that the sand falls through the aperture at a constant rate, how fast is the level falling when: a) the depth of the sand is 6 ...

*October 18, 2016*

**Highland**

A cash register has no one dollar bills and all of the bills are five dollar bills $10 bills or $20 bills they are a total of 37 in the cash register and the total value of his bills is &310 if the number of the $10 bill in the register is twice the number of $20 bills how ...

*September 12, 2015*

**Algebra please help**

Could someone be a bit more specific about what you do? Cuz I do 15x5,280=79,200 then what?

*November 20, 2014*

**Maths**

The sum of two whole number is 23.The different between them is 5.What is the smaller number?

*March 4, 2013*

**Maths**

The sum of two whole number is 23.The different between them is 5.What is the smaller number?

*March 4, 2013*

**Maths**

The two digits of a 2-digit number add up to 16. The smaller digit is in the ones place. What is the number

*February 14, 2013*

**chemistry**

If the iodine value obtained for an experiment is negative,could this be due to an experimental error?

*June 10, 2012*

**Chemistry**

Write a balanced equation for the formation of boehmite (ALO2H) from aluminium ions and hydroxide ions.

*June 4, 2012*

**physics**

What is the magnitude of an electrostatic force experienced by one elementary charge at a point in an electric field where the field intensity is 3.0 x 10^3 newtons per coulomb? a) 1.0 x 10^3 N b) 1.6 x 10^-19 N c) 3.0 x 10^3 N d) 4.8 x 10^-16 N

*February 15, 2012*

**science/physics**

I was in a crosswalk, struck by a truck weighing 3,400 lbs. (traveling at about 8 K/hr) - what was the force per square inch exerted on me?

*August 9, 2011*

**Chem**

Using this formula.. pH = -log(H^+) find the pH 1.6 x 10^(-5)

*June 19, 2010*

**Algebra**

Evaluate the logarithmic function for three values of x between zero and one, three values of x greater than 1, and at x=1. Show your work. Use the resulting ordered pairs to plot the graph. State the domain and the range of the function. g(x) = ln x + 2

*June 19, 2010*

**Calculus I**

dR/dt = .3 ohms/s I = 18V/R d/dt(I) = d/dt(18V/R) dI/dt(I) = dR/dt(18V/R) dI/dt = dR/dt*(-18/R**2) dI/dt = .3*(-18/4**2) dI/dt = -.3375amp/s Hope you understand my work! Cheerz

*March 1, 2010*

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