07/18/15

Physics: What harmonic number are these two frequencies listed.
A pop bottle style instrument is played being open at one end closed at the other, if two successive frequencies, 350 Hz and 490 Hz, are produced, what is the fundamental frequency, and what... more
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07/17/15

Prove that if a?(-1,1) then an converges to 0 as n?8
Prove that if a∈(-1,1) then an converges to 0 as n→∞   I have had trouble proving this with the correct notation.
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07/07/15

A 1 cm object is placed 20 cm from a lens. The lens forms a real and inverted image of size 1.5 cm. What is the focal length of the lens?
a. 8.0 cm b. 12 cm c. 20 cm d. 16 cm
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07/07/15

Physics: Two unequal masses of iron both have the same Internal energy, which of the following is true?
Two unequal masses of iron both have the same Internal energy, which of the following is true?   a. The larger mass is hotter b. The smaller mass is hotter c. The have the same temperature
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07/03/15

Wha is the final temperature of this mixture?
I'm reviewing some practice thermodynamics questions for my upcoming physics exam but I can't figure out how to set these up properly.   1. If you mix two parts hot 80° C water with one part 10°... more
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06/29/15

I asked to find the range of the measure of the third missing side of 7 and 9, 32 and 61, and 75 and 75
 I'm very confused on how you would solve these.
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06/29/15

what is the value of w3?
for this problem, involving a weighted die, assume that 3, 6, 1, and 5 are equally likely, a 2 is three times as likely as a 5, and a 4 is four times as likely as a 2.   what is the value of... more
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06/28/15

How do you differentiate sin(x) - ln(2x)
Please explain how to do this sir
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06/28/15

if you flip a coin 7 times what is the probability of getting one head
I need to know how to figure out the probability of getting heads a single time after flipping a coin seven times.
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06/24/15

How long would it take each of them to complete the cleaning alone?
Genny and Ty work together to clean the rooms in a B&B in 2 2/9 hours.   Working alone, it would take Genny 1 more hour than it would take Ty. How long would it take each of them to complete... more
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06/23/15

Physics: Angular velocity (multiple choice)
At a dilapidated playground, people have stolen the support bar to a merry-go-round leaving a flat disk that can rotate freely. While pondering conservation of angular momentum, a curious physics... more
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06/17/15

thermodynamics
How do you find the specific volume with just temperature and pressure given?
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06/14/15

show that each expression is equivalent to ln8
(log102 + log104) / log10 e   I got as far as: log108/log10e but then I don't know how to simplify log10e and end up getting ln8 as an answer
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06/12/15

solve problem
Factor the polynomial F(x). Then solve the equation f(x)=0   f(x)=x4-5x3-9x2+81-108   The factorization of F(x) is f(x)=   The solutions to f(x)=0 are=
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06/11/15

Help me with physics
An object is placed 375 mm in front of a concave mirror with focus 250 mm.if the object is moved 25 mm away from the mirror,then it's shadow will shift to ...mm   a.80 b.82 c.83 d.84 e.85
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06/05/15

largest area that can be enclosed is BLANK square meters.
farmer ed has 8,500 meters of fencing, and wants to enclose a rectangular plot that borders on a river. if farmer ed does not fence the side along the river, what is the largest area that can be... more
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05/27/15

Identify the type of conic section and coordinates of the center, foci and vertices.
(y+3)^2/25+(x-2)^2/16=1
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05/27/15

General solution of differential equation?
What is the general solution of (2+x)y'=3y? I've gotten to e^((1/3)lny) = e^(ln(2+x)+c) , but I don't know how to simplify it further.
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05/27/15

Consider the function f(x)=8sqrt(x)+7
Consider the function f(x)=8sqrt(x)+7 on the interval [36] . Find the average or mean slope of the function on this interval. By the Mean Value Theorem, we know there exists a c in the open... more
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05/22/15

angular velocity physics question PLEASE HELP??
Dart hits wheel. In terms of m, M, v0, and R (of wheel), find:   A) angular speed of wheelB) ratios of initial and final kinetic energies
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05/21/15

"Hard" Equilibrium problem
Given the initial concentrations below, calculate the concentration of CO2 (g) at equilibrium. You know that the initial concentration of CH4 is 0.5 M and the initial concentration of the O2 is 0.4... more
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05/17/15

Hi, we were given an assignment in integral calculus that I can't solve. Any help would be greatly appreciated.
"Find the centroid of the plane region bounded by the parabola y^2 =4x, the y axis and the line y=4."
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05/14/15

Distance change
A 14 cm diameter champagne bottle rests on its side on top of along frictionless table. Suddenly, the cork pops and the bottle slides backward moving a distance of 22.0cm in 0.44s. If the mass of... more
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05/14/15

Center of mass
Initially, a cylindrical bottle of bottle of oil-and-vinegar salad dressing whose volume is 1/3 vinegar (p=1.01 g/cm^3) and 2/3 oil (p=0.910 g/cm^3) is shaken so that the oil and the vinegar are... more
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05/11/15

Sand falls from a conveyer belt at a rate of 15m^3/min. How fast is the height changing when the pile is 2m high?
This is a related rates problem using cones. I am in Calculus.
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