Carl_Pham
 Name:
 Carl Pham
 School:
 BS MIT 1984, PhD UC Berkeley 1989.
 About:
 About 20 years experience teaching college science.
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Mashy:
Black body
any body painted completely with lamb black is 98% perfect black body... it appears black cause it absorbs almost all the ligh…
 updated one year ago
 29 replies
 3 Medals
Mathematics

Toastkiller13:
Do you need Molar mass to solve a volumevolume stoichiometric calculation?
 updated one year ago
 1 reply
 2 Medals
Mathematics

eddwintton:
In an Fe2(SO4)3 solution the concentration of SO42−is 0.25 mol L−1. What is the concentration of solute?
 updated one year ago
 1 reply
 1 Medal
Mathematics

lindsaysomething:
.
 updated one year ago
 3 replies
 No Medals Yet
Mathematics

LoliconShot:
You have a .025g Lithium ribbon and excess HCl. Using these 2, the reaction is:
2Li(s) + 2HCl(aq) > 2LiCl(aq) + H2(g)
…
 updated one year ago
 1 reply
 No Medals Yet
Mathematics

Nonaboo:
After a ___________ siege, Carthage fell to Rome.
 updated one year ago
 2 replies
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Mathematics

Lsanchez123:
The vapor pressure of benzene is 100mmHg at 26.1C and 400mmHg at 60.6C. What is the boiling point of benzene at 760mmHg?
 updated one year ago
 2 replies
 No Medals Yet
Mathematics

twitter:
Electric field strength is defined: “force per unit positive charge on a small test charge”.
Why is it necessary for the test charge to be…
 updated one year ago
 6 replies
 No Medals Yet
Mathematics

ariellams:
Which of the following produces the energy, initial motion, and direction of the surface currents in the oceans? (1 point)
Coriolis Effect…
 updated one year ago
 1 reply
 No Medals Yet
Mathematics

Joserg16:
Who has the responsibility for settling disputes over meaning in the Constitution?
Legislative branch…
 updated one year ago
 3 replies
 2 Medals
Mathematics

katlin95:
please help guys!! medals rewarded:))))
you will explain how human activity and natural processes alter the hydrosphere, biosphere, litho…
 updated one year ago
 2 replies
 1 Medal
Mathematics

ArielAirplanes:
In 1917, the pacifist and socialist Norman Thomas described conscientious objectors in this way: "He may believe in dying for one's country,…
 updated one year ago
 3 replies
 No Medals Yet
Mathematics

Stormswan:
How is an electron cloud part of the current atomic model?
 updated one year ago
 2 replies
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Mathematics

lazombie76:
New York City became the nation’s greatest commercial center because
 updated one year ago
 1 reply
 1 Medal
Mathematics

ChicaAmbitio:
Describe three societal needs that drive scientific endeavor and give an example of a scientific endeavor associated with each.
 updated one year ago
 3 replies
 1 Medal
Mathematics

elly394:
What is a substance that is an acid under the BronstedLowry model, but not under the Arrhenius model?
 updated one year ago
 10 replies
 2 Medals
Mathematics

quarkine:
When we bring charge from infinity to free space,the work done is said to be zero.but by bringing the charge we are actually creating the el…
 updated 7 months ago
 10 replies
 2 Medals
Mathematics

swagking:
People who are against capital punishment argue that it violates the
 updated one year ago
 2 replies
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Mathematics

KiwiBaby:
Considering the substances' boiling points, which statement is true?
The boiling point of CO is expected to be higher than NaCl.
The boi…
 updated one year ago
 2 replies
 No Medals Yet
Mathematics

knight231:
Suppose a candle is burning, and wind is blowing on one side of the flame.
Which principle explains why the flame bends toward the wind?…
 updated one year ago
 2 replies
 1 Medal
Mathematics

MikaylaS1059:
Explain how and why entitlements affect government spending. Im Stuck and really don't know help me !
 updated one year ago
 4 replies
 1 Medal
Mathematics

Dipankar:
HELP!!
i have a question!! Infact 2 questions about measurement uncertainty
In 149.9 ± 0.1 cm .... does 0.1 cm actually means 0.099999999…
 updated one year ago
 1 reply
 No Medals Yet
Mathematics

Victor28:
Desalinization plants remove the salt from sea water and make it usable for drinking and irrigation. Review the following statements and sel…
 updated one year ago
 1 reply
 1 Medal
Mathematics

shootlkeagirl:
Which colony was known as the most tolerant because its Quaker founders welcomed many different Christian religions?
 updated one year ago
 1 reply
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Mathematics

saladtop:
what accounts for why the soviet union decided to formalize its east european alliance through the warsaw pact
 updated one year ago
 1 reply
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Mathematics

naraly:
What was the key challenge faced by the Allies during World War II?
lack of funding for the war
…
 updated 4 months ago
 4 replies
 No Medals Yet
Mathematics

cculliver:
how can you predict which elements are reactive under normal conditionsand which are unreactive
 updated one year ago
 3 replies
 1 Medal
Mathematics

coooookiesghdrfhgd:
PLEASE HELP ME ! a 77 kg male looking to burn 120 calories for 30 minutes of swimming should choose the fast crawl stroke. t or f?
 updated one year ago
 8 replies
 No Medals Yet
Mathematics

prem_merp:
can someone please tell me mobility of electron and hole in silicon at room temperature???
 updated one year ago
 1 reply
 No Medals Yet
Mathematics

clynch:
how is world's population different today then 100 years ago
 updated one year ago
 3 replies
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Mathematics
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