3,534 Answered Questions for the topic Science

07/15/15

Physics: frequency, harmonic number

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

07/10/15

Physics: volume expansion, temperature (thermodynamics?)

Rivets can be cooled before they are put in place, thus when they reach equilibrium temperaturethey are more firmly fixed in place.   If the volume expansion of iron is 35.0 X 10-6 K-1 what... more

07/09/15

Physics: Entropy Change

If a 0.06247 kg ice cube initially at 0.00 C is allowed to melt in a Styrofoam cup holding 0.497 kg of water at 10.0 C , what is the total entropy change for this process?

07/09/15

Physics: Calorimetry

Calorimetrya. How much heat needs to be taken from 0.5 kg of ethyl alcohol as a gas at its boiling point of 78.0 C to a solid at its freezing point -114 C if the latent heat of vaporization is... more

07/07/15

Physics: what phase would I be in?

On a phase diagram there is a triple point, where solids liquids and gasses all exist at the same temperature and pressure. If I decrease the temperature but increase the pressure from this triple... more

07/04/15

A light ray entering a positive lens that becomes deflected through the focal point entered the lens..?

a. must have passed through the center of the lens b. parallel to the horizontal axis c. must have pass through the focal point on the opposite side of the lens d. vertically
Science Math Physics Mass

07/02/15

How long will it take for this hanging mass to return to the zero angle?

Hello, I'm taking a summer course in college physics and am reviewing some practice questions to prepare for my oncoming exam. I'd really appreciate some help on this question that I'm not sure... more

06/28/15

How do you calculate the conversion of 200mLs of Dimethysulfoxide (DMSO) to grams?

I calculated 220.08 grams using the equation "mass = (volume)(density)",but this does not seem correct. Thank you.
Science

06/22/15

how many chromosomes does zygomycetes have?

 I cant find this anywere. 
Science Physics

06/21/15

Physics help!

A small loop of wire with radius 2 cm is placed in a uniform upward magnetic field. By what factor does the flux change if the radius of the loop is increased to 8 cm?    

06/14/15

HELPP PLEASEE

What study strategies would make effective use of the levels-of-processing approach to memory?
Science

06/13/15

How are sponges different from other animals and how do they obtain their food?

Well the answer dosnt have to be in detail 
Science

05/19/15

A runner travels 800 meters ( 2 full laps ) in 80 seconds, what is the runner's displacement

I have a science exam and do not understand this question. Please help

05/16/15

For the reaction : 4Fe+3O2-->2Fe2O3, if 100 g of Fe are used how much Fe2O3 are produced?

I'm having such a hard time with this..It's my physics HW and I don't know how to solve this.
Science Physics

05/14/15

Help! Bad movie Physics coefficient of friction question! PLEaSE HELP!!!

I am doing a project for my physics class about bad movie physics. I am using the movie Frozen and a scene where Elsa uses her powers to magically create ice under anna. anna then slides. I need to... more
Science Physics

05/14/15

Suppose that the displacement of an object is related to time according to the expression x = Bt2. What are the dimensions of B?

Suppose that the displacement of an object is related to time according to the expression x = Bt2. What are the dimensions of B?
Science

05/14/15

How does the Parkinson’s Disease, affect your body system?

Parkinson’s Disease, affect your body system?Parkinson’s Disease, affect your body system? 
Science

05/13/15

what do insects use to breathe

what do insects use to breathe 
Science Earth Science

05/11/15

Write in the Percent Composition of the entire atmosphere

i only want the percentages of each layer of atmosphere Please
Science

05/07/15

What is a chemical reaction

It has to do with science
Science Biology Anatomy

05/02/15

During exercise, venous return is enhanced by?

a.the operation of carotid arterialand femoral arterial valves.b. the operation of the respiratory muscle/ventilation pump.c. skeletal muscle pump operation.d. all of the above.e. only b &... more
Science

04/15/15

Why does yeast not belong in the eubacteria kingdom

It is for my science homework that is due in about 1 hour! I need an answer now!
Science Astronomy

04/14/15

Astronomy question about comets

I am stuck on this one question on my science homework, and I would like to know how to answer it so I can be ready for a quiz, too. Please help.   Suppose a comet passes the sun every 57 years,... more

04/13/15

-7×(-4)÷14 2 the power of 2

need help with algebra expresions

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