Friday

July 25, 2014

July 25, 2014

Total # Posts: 25

**Physics**

Two charged particle are fixed on the x-axis 11 cm apart. The one on the left has a net charge of +25uc and the one on the right has a net charge of -11uc. What is the magnitude of the electric field 10 cm to the right of the negative charge? How do you solve this problem? Tha...

**trig**

Find all the solutions from [0, 2pi] cot^2x+csc=x

**gen physics**

An iron (ƒâ = 7860 kg/m3) cube measuring 15.4 cm on a side is suspended from a wire. Find the tension in the wire when the block is completely submerged in water (ƒâ = 1000 kg/m3).

**physics**

A hydraulic jack has an input piston with a diameter of 1.00 cm, and an output piston with a diameter of 6.00 cm. What weight (in N) can be lifted when a force of 45.8 N is applied to the input piston? Answer is 1650 N but I need someone walk me through the steps please.

**physics**

A tank contains mercury, whose density is 13 600 kg/m3. Find the force exerted by the mercury on a circular plug at the bottom of the tank. The plug has a diameter of 2.54 cm, and is located 37.6 cm below the surface of the mercury. The answer is 25.4 N but I don't know ho...

**Physics**

An object (m=2.85 kg) is attached to a disk-shaped pulley. The diameter of the pulley is 0.242 and its weight is 7.272 N. Suppose the object is allowed to fall (a) What is its linear acceleration? (b) What is the angular acceleration of the pulley? (c) How far does the bucket ...

**math**

The scale factor for two similar retangles is 3. If the area of the smaller rectangle is 8m^2, what is the area of the larger rectangle.

**Math-factoring**

factor 5m^2-m-20

**Math**

Find relative extrema of f(x)=x^3-3x^2+4

**Calculus**

Given y=(x^2+2)sqrt(x^3-8x) Find dy/dx

**Calculus**

a)Find dy/x where y=tan(4=x^3)^4? B) Find relative extrema of f(x)=x^3-3x^2+4

**chemistry**

When a 0.5725 g sample of Lysol was titrated with 0.100 M NaOH, an endpoint was obtained at 15.00 mL. What is the percent of HCl in the Lysol sample?

**Calculus**

find the area under the curve y = x^2 + x from the origin to the line x = 3

**Calculus**

Find the derivative of y = 3x+2/x+1

**calculus**

When the area in square units of an expanding circle is increasing twice as fast as its radius in linear units, the radius is (a) 1/4pi (b) 1/4 (c) 1/pi (d) 1 (e) pi

**Finite Math**

Time-share sales provide an opportunity for vacationers to own a resort condo for 1 week (or more) each year forever. The owners may use their week at their own condo or trade the week and vacation elsewhere. Timeshare vacation sales usually require payment in full or financin...

**Graphing**

I am plotting V/Vo vs 1/[C] and am asked to extrapolate to infinite concentration to obtain b/Vo, the intercept. How would I go about doing this?

**chemistry**

9.10-5.41=3.69 18.0152/3.69=??

**chemistry**

well i got 3.69% but that doesnt look right

**chemistry**

is the answer 40.5% or 59.5% ?

**chemistry**

a hydrated salt is a solid that includes water molecules within its crystal structure. a student heated a 9.10-gram sample of a hydrated salt to a constant mass of 5.41 grams. what percent by mass of water did the salt contain?

**Math: Calculus**

Does it mean, 0.5*10*70=350 m?

**Cultural Anthropology**

I'm having trouble coming up with a topic that'll expand to 10 pages for my final research project. I have to choose a culture and an issue within that culture. Any ideas will be appreciated! Thanks!

**Statistics**

A gas station manager thinks the average motorist changes their oil less than the recommended two times per year. In a survey 15 car owners were asked how many times they changed their oil in the past year. Here are the results: 1 1 2 1 2 2 0 1 0 1 2 3 1 3 0 The value of the t...

**chemistry**

the ans, is 45.6

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