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1,5,23,85,271 nth sequence
Asked by eoht31415, Dec 15, 2017 06:44 AM in Mathematics
What is the nth sequence?
Asked by dianem1, Dec 10, 2017 03:23 PM in Chemistry
I did an experiment using a calorimeter to determine the energy produced when certain salts are mixed with water. How do you calculate the energy...
Asked by PlantZart, Dec 5, 2017 07:44 PM in Botany
I have a small tree in my house that just started to bloom. It's about 4 feet tall with long leaves with, what looks like parallel veins. For the...
Convert 6-12V to 0-5V
Asked by E7Student, Dec 9, 2017 10:07 AM in Electrical Engineering
I have a input signal span from 6-12V and I want to drop to it to 0-5V. HOw to do it ?
How many years are between a full moon happening on the same day of the month?
Asked by ajane1551, Nov 24, 2017 11:16 PM in Astronomy
So, say a full moon happened on November 15th. How many years would pass before another full moon happened on November 15th? Is this even possible to...
Why this seesaw is working against physics laws
Asked by vikram_gupta11, Sep 27, 2017 08:23 PM in Physics
Dear Members, See the attached link. Now I explain in simple words how it will work. In the video you can see a...
Moment of inertia
Asked by safal, Nov 29, 2017 12:50 PM in Physics
a horizontal platform in the shape of a circular disk rotates in a horizontal plane about a frictionless vertical axle.the platform has a mass...
Simple maths that is making my head implode
Asked by Sam_alex66, Nov 22, 2017 04:08 AM in Mathematics
You have 1kg of unroasted green coffee beans at a cost of $7. When you roast this coffee you lose 20% of the original weight to produce only 800g of...
What is cultivar-independent?
Asked by thanopc, Nov 20, 2017 08:46 AM in Biology
I'm new to this website.I want to know the meaning or some explanation about the "cultivar-independent" could anyone answer this for me? Thanks in...
Deriving Function Problem
Asked by BlackPen, Nov 14, 2017 06:10 PM in Mathematics
Suppose that g is a real valued, differentiable function whose derivative g' satisfies the inequality |g'(x)|less than or equal to M for all x in R....
Difficult math problem:
Asked by Cowdog, Nov 12, 2017 11:41 AM in Mathematics
How many times do write digit 1 if you write all possible natural numbers up to seven digits using digits 0 and 1 only?
Force required to move block when between two surfaces
Asked by LetzelPretzel, Nov 7, 2017 07:13 PM in Physics
A 5N block sits on a table with a smaller (1N) block on top, attached to the table with a string that makes an angle of 65 degrees to the table. All...
Asked by lily1027, Nov 1, 2017 09:55 AM in Physics
1. Compute the defection of a structural member made of aluminum if a load of 500 lb isapplied to the bar. The member has a uniform rectangular cross...
The math club has a budget of $100 for a pizza party.
Asked by 1503021, Oct 28, 2017 08:46 AM in Mathematics
the math club has a budget of $100 for a pizza party. the club can get large pizzas, x, for $12 and cases of soda, y, for $5.50. the club would like...
How could someone detect and remove the chemical composition of a given stain ?
Asked by choveshcourse, Oct 22, 2017 11:35 PM in Chemistry
Hi Teddy, For a long while I have had a desire to tackle the question of how to clean clothes without using water or perc (dry cleaning). ...
How slow can a planet rotate around its axis ?
Asked by maxsc, Oct 17, 2017 02:59 AM in Physics
How slow can a planet rotate around its axis ? Thank you.
Moths in bathtub
Asked by Thomasxyz, Oct 20, 2017 08:34 AM in Entomology
I live in Seattle and this problem started while I was on vacation at the end of September. I came home and found my bathtub full of moths. I think...
Asked by Bobert2411, Oct 14, 2017 07:42 PM in Chemistry
A student weighed 1.0000 grams of copper powder. He placed it in a crucible and heated it to complete oxidation to copper oxide. He was able to get a...
Turn the power on in the daytime photocell
Asked by CuriousDad01, Oct 16, 2017 10:02 AM in Electrical Engineering
If the common dusk till dawn photocell (resistor?) turns the power ON when dark and OFF in the light what type of photocell would be used to turn the...
How much tilt can an earth-like planet have?
Asked by maxsc, Oct 17, 2017 03:09 AM in Ecology & Environment
Can an Earth-like planet be tilted by 78 degrees for example, and still support Earth-like ecosystem and life as we know it?

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