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Chemistry
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 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.
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?
How to solve this wooden board of 27 inches
Asked by tabina, Oct 15, 2017 01:48 PM in Mathematics
A wooden board 27 inches long is cut in 2 pieces so that the long piece is 3 inches less than 4 times as long as the shorter piece . Find the length...
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. https://youtu.be/NTKw2Hp6tPw Now I explain in simple words how it will work. In the video you can see a...
Citric acid vs sodium chloride
Asked by 19-8190, Sep 29, 2017 04:05 PM in Chemistry
I did this lab where we had to design our own lab using a regular and sour pack of Skittles, a sodium chloride solution, and chromatography paper. I...
we have constructed an sign 4' x 8'. How can we provide the wind load for a permit?
Asked by montgomery1, Sep 25, 2017 03:07 PM in Civil Engineering
The sign is 4' x 8'. The sign is made of 2' x 6' treated lumber, for the frame, and 2 sheets of Royal Mouldings Limited PVC Board (4' x 8' ft....
Further mechanics
Asked by lucy1314, Sep 24, 2017 08:29 AM in Physics
In a rollercoaster, for a passenger to remain in contact with his seat, the centripetal force must equal the weight. Why is this?
Getting Unwanted Transitional Values from Push Button Switch
Asked by Brak, Sep 13, 2017 07:10 PM in Electrical Engineering
When I toggle a push button switch on and off, instead of getting a pure on/off continuity levels I sometimes get "transitional" values. I need it to...
How do you determine the lower limit (a) in the attached integrale in MATLAB?
Asked by MBarosM, Sep 20, 2017 07:15 AM in Physics
I have the following situation, and I would like some help to get started: https://ibb.co/jmrxeQ I know that you are suppose to show your own...
Find velocity
Asked by Kimberlyq96, Sep 19, 2017 10:04 AM in Physics
If the radius of Earth is 5400km, what is acceleration on its surface? Wants us to use formula: Ac=v^2/r
Computational Topology - Vietoris-Rips Complex
Asked by moh533, Sep 14, 2017 09:12 PM in Mathematics
Write code for the function RipsComplex(P,d). - Inputs: - P : a set of points P belonging to R2 given as a k x 2 numpy matrix - d : a...
Computational Topology - Vietoris-Rips Complex Graph
Asked by moh533, Sep 14, 2017 09:09 PM in Mathematics
Write code in Python for the function RipsGraph(P,d) as follows. - Inputs: - P : a set of points P belonging to R2 given as a k x 2 numpy...
Computational Topology - Order Complex
Asked by moh533, Sep 14, 2017 09:00 PM in Mathematics
Please delete this post
Right Sampling Technique
Asked by healthbeyond, Sep 14, 2017 07:40 PM in Social Science
Good day! I would like to ask if this is the right sampling technique for our study. The title of the study is the levels of aggression of Senior...
True or false chemical reaction happen even when the atoms reacting do not collide
Asked by ch0824, Sep 14, 2017 09:44 AM in Chemistry
True or false chemical reaction happen even when the atoms reacting do not collide True or false chemical reaction happen even when the atoms...
what is the wavelength (in nanometers) of light that has a frequency of 5.88 x1014 s-
Asked by corey125, Sep 14, 2017 09:53 AM in Chemistry
what is the wavelength (in nanometers) of light that has a frequency of 5.88x10^14 s-1?
Projectile Motion On An Inclined Plane
Asked by SimonJensen, Sep 11, 2017 12:45 PM in Physics
I was given the following information: A ball is thrown with an initial velocity V0 atan angle of φ at an inclined planethat has an angle of θ with...
Innovative projects for aerospace engineering
Asked by pallavi cj, Sep 1, 2017 11:17 PM in Other Engineering
Since I am a final year aerospace engineering student I am supposed to choose my project , as am searching for innovative projects regarding...


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