Wednesday
July 23, 2014

Posts by Long


Total # Posts: 28

Physics
Consider a car starting at rest at the beginning of a 250 m street. At time t = 2.0 s it is 20 m along the street. At time t = 4.0 s it is 80 m along the street. Find its average velocity in the: (a) First 2.0 s (b) First 4.0 s (c) Last 2.0 s My work: I have done 2 question a ...

english
What makes citing and referencing electronic sources difficult? What can one do to ensure one has done so correctly?

science
How do quarks differ from other elementary particles?

science
Some theoriests say that in the inflationary period, the scale of the universe increased by a factore of 1050. Suppose your height were to increase by a factore of 1050. How tall would you be? Express your answer in light-years and compare it to the size of the observable univ...

science
What conditions are present in stars that cause hydrogen to form helium? What is this process called?

science
Most stars we see are on the main sequence. Stars spend most of their lives consuming their initial stock of hydrogen. Is there a connection between these two statements? If so, what is it?

physics
How might you determine the age of a star from an Earth-based telescope? What measurements might you make?

physics
How might you determine the age of a star from an Earth-based telescope? What measurements might you make?

science
The Kangzi dictionary compiled in China in 1710 during the Qing dynasty encompasses 46964 characters. How many bits would it take to specify a specific Kangzi character

science
What kind of chemical bonding(chemical elemants) occurs in bricks, elastic, and rope

science
How do the principles of physics and chemistry both come into play when developing new materials

science
How do the principles of physics and chemistry both come into play when developing new materials?

science
The Kangzi dictionary compiled in China in 1710 during the Qing dynasty encompasses 46964 characters. How many bits would it take to specify a specific Kangzi character?

science
What kind of chemical bonding occurs in bricks, elastic, rope?

science
THANK YOU!!!!!

science
Are the following substances acid, base, or neutral: sodium bicarbonate (pH = 8.3): Blood (pH = 7.4): milk (pH =6.7): orange juice (pH = 3.6): milk of magnesia (pH = 10.5): How do you come up with the answers?

critical thinking
I am not sure, I no not see any mission related environmental risks and to be perfectly honest I do not understand it at all.

critical thinking
Read the scenario. Using the information provided in the references and lesson, arrive with your best possible solution. You are a squad leader in Sapper platoon, Special Troop Battalion, 3rd Brigade, 10th Mountain Division. Your unit will deploy to Afghanistan to conduct oper...

physics
An ocean liner experiences broad waves, called swells, with a frequency of one every 20 seconds (0.05 Hz) and a wavelength of 440 feet. Assume the waves are moving due east. If the liner maintains a speed of 15 miles per hour, will it have a smoother trip going east or west? Why?

Physics
Two parallel, uniformly charged, infinitely long wires carry opposite charges with a linear charge density ? = 5 £gC/m and are 8 cm apart. What is the magnitude and direction of the electric field at a point midway between them and 49 cm above the plane containing the tw...

physics
b= sqrt(2gh)

Physics
C. 100.8 1m*100cm/m /5.6 cm/s = 1800s (7.1-2.4)rad/s/1800s =.00261 rad/s^2

Physics
C. 0.00294 rad/s^2

chemistry
What is the IUPAC name of the following compounds? a) ---CHO ---I CH3CCH3 ---I ---CH2CH3 b) -----------CH3 -----------I CH3CHCH2CH2CHCH2CH3 ---I ---CH2CH3

chemistry
What is the IUPAC name of the following compounds? CH3 I CH3CHCH2CH2CHCH2CH3 I CH2CH3

chemistry
How many grams of hydrogen can be produced by the electrolysis of water with a current of 0.442 A running for 2.00 min? I got 0.000549g. can someone check my answer

chemistry
Calculate the cell potential of a cell operating with the following reaction at 25°C, in which [Cr2O72‾ ] = 0.030 M, [I ‾ ] = 0.020, M, [Cr3+ ] = 0.20 M, and [H+ ] = 0.60 M. Cr2O72-(aq) + 6 I ‾(aq) + 14 H+(aq) → 2Cr3+(aq) + 3 I2(s) + 7 H2O(l)

chemistry
The amount of lactic acid, HC3H5O3, produced in a sample of muscle tissue was analyzed by reaction with hydroxide ion. Hydroxide ion was produced in the sample mixture by electrolysis. The cathode reaction is given below. 2 H2O(l) + 2 e ‾ → H2(g) + 2 OH ‾ (aq...

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