Friday
July 25, 2014

Posts by san


Total # Posts: 51

Physics
PE =mgh = 0.1* 9.8 * 0.80 m = 0.784 J

PHYSICS
A SPRING WITH A CONSTANT K = 8N/m IS STRETCHED 5CM AND RELEASED. IT BOBS UP AND DOWN EVERY 2.5 SECONDS. WHAT IS ITS FREQUENCY, PERIOD, ABD AMPLITUDE

solving equations by sibstitution
multiply the top by positive 8 and multiply the bottom by negative 6. then cancel out the y's and solve for x. plug x back into anyone and solve for y.

Physics
Oh. That was quite straight forward. Thank you.

Physics
A force of 3.0 newtons applied to an object produces a change in velocity of 12 meters per second in 0.40 second. the mass of the object is? I am not sure how to solve this problem. Formula for momentum is p= mass times velocity impulse (J) = Fnet times time in seconds

chemistry
Assume you are performing the calibration step of Experiment 8 and you begin with 70 g of water at 20 oC and 70 g of water at 80 oC. After adding the two portions of water into your calorimeter setup and following the procedure outlined in the experiment, you determine the tem...

ua
Assume you are performing the calibration step of Experiment 8 and you begin with 70 g of water at 20 oC and 70 g of water at 80 oC. After adding the two portions of water into your calorimeter setup and following the procedure outlined in the experiment, you determine the tem...

Physics
A hot air balloon containing an AP Physics student ascends vertically at a constant speed of 8 m/s. While ascending, he accidentally drops his rubber duckie from the gondola of the ballong. Seven seconds after it is dropped the duckie bounces off a roof at point A and hits the...

finance
The Nutrex Corporation wants to calculate its weighted average cost of capital. Its target capital structure weights are 40 percent long-term debt and 60 percent common equity. The before-tax cost of debt is estimated to be 10 percent and the company is in the 40 percent tax b...

Spanish
11. Si ---------- el número de mi jefe, le -------- para decirle que no puedo ir al trabajo hoy. A. sabría, llamara B.llamaría, supiera C. supiera, llamaría D.llamara, sabría My Ans: C 12. ------------ a la fiesta si ----------- encontrar un...

Spanish help please
Si ---------- el número de mi jefe, le -------- para decirle que no puedo ir al trabajo hoy. sabría, llamara llamaría, supiera supiera, llamaría llamara, sabría 12. ------------ a la fiesta si ----------- encontrar un vestido apropiado para l...

chemistry
abcbbbbbbbbbcddddaaaaaaaaaaaa

Maths
if the ratio of the length to the breadth of a rectangle be 5:3 and its perimeter is 144m, find the length of the rectangle .

fin decision making for managers
Aberdeen Corp. uses activity-based costing system with three activity cost pools. The following cost information is provided: Wages and salaries $ 220,000 Depreciation 120,000 Utilities 100,000 Total $440,000

chem
When a bond forms between C(H3) and MgBr, why would MgBr have a partial positive charge?

chemistry
How do I draw Lewis Structure for BN and CN-

Business Finance
35,0000

chemistry
PCL5(g) -> PCl3(g) + Cl2 (g) Kp= 23.6 at 500K Calculate the equlibrium partial pressures of the reactants and products if the initial pressures are Ppcl5 = 0.560atm and Ppcl3 = 0.500atm.

Chemistry
Is it possible to calculate heat of vaporization if i only have pressure and temperature.

Chemistry
but there aren't enough information to use Clausius-Clapeyron equation

Chemistry
On top of one of the peaks in Rocky Mountain National Park the pressure of the atmosphere is 500. torr. Determine the boiling point of water at this location. The heat of vaporization of water is 40.7 kj/mol.

Chemistry
How many grams of PbCO3 will dissolve in 1.00L of 1.00M H+ is added to 5.00g of PbCO3?? PbCO3(s) + 2H+ (aq) -> Pb2+ (aq) + H2O (l) + CO2 (g)

Chemistry
A 0.100g sample of a compound containing C, H, and O is burned oxygen producing 0.1783 g of CO2 and 0.0734 g of H2O. Determine the empirical formula of the compound.

BUSINESS
WHAT ARE the pros and cons of the following statement: “Egalitarian companies are more innovative.”

physics
The temperature of 6.80 mol of an ideal monatomic gas is raised 12.0 K in an adiabatic process. What are (a) the work W done by the gas, (b) the energy transferred as heat Q, (c) the change ΔEint in internal energy of the gas, and (d) the change ΔK in the average kin...

physics
A rocket is fired at a speed of 75.0 m/s from ground level, at an angle of 67.6° above the horizontal. The rocket is fired toward an 11.0 m high wall, which is located 29.5 m away. By how much does the rocket clear the top of the wall?

chemistry
what particles with electrical charges repel one another

math
2 person in a business. first pur $100& gets $120 and second puts $80 and gets $100. Who gains more and by what percentage?

math
a. C'=-a/q^2 Units: dollars per cell phone unit

Physics
A commercial resistor can safely dissipate power only up to a certain rated value. Beyond this value, the resistor becomes excessively hot and often cracks apart. The resistor used in this experiment was rated by the manufacturer to be a 2 watt resistor. What is the largest vo...

Business 210
Review the business in action case studies on pp.143,.146,.154, and 159 of the text in Cpt3 select one case that you find especially interesting and explain how ethics and decision making effect the individuals involved in the scenario.

college chem
n one experiment, the mass of the metal block is 93.3 grams, the volume of water used is 96.3 mL, the temperature of the cold water extrapolated to the time of mixing is 20.4oC, and the temperature of the metal block and water extrapolated back to the time of mixing is 28.7oC....

english
the term freewriting refers to?

English
I have to write and essay on similarity and difference. What are some points to writing paragraphs for the body?

speaker vs. poet
There is really no importance. But, the difference is that the poet is the person who writes the poem, and the speaker is the person who tells the story.

physics
why are ice packs at 0 degree better for cooling a sprained ankle than similar sized packs containing water at 0 degree? thanks Ice has much more thermal capacity to cool. Consider the heat that has to be removed at 0C to turn to ice, 80cal oer gram.

Public Administration
Does Jiskha have Public Administration or Organizational Behavior experts available? Or. is there an expert on public sector OB and public sector finance? Not exactly. The closest is one person has a Masters in Systems Management (UnivSouthernCal).

Biology
do you know if there are any good websites on population distrubution patterns and relevant adaptations of organisms? You need to choose a population. A species of orchids? A species of animals (kangaroo, etc)? A type of bird? A disease vector ? Make a list of desired populat...

chem
how do u calulate percentage composition of NO2 [mass N/mass NO2] x 100 = %Nitrogen [mass O2/mass NO2] x 100 =%oxygen

chemistry
when 1.40 g of hydrated magnesium salfate is heated to constant mass, 0.68 g of the anhydrous salt remains. find the formula for the hydrated magnesium sulfate. MgSO4*xH2O ==> MgSO4 + xH2O grams water = 1.40 - 0.68 = ?? mols H2O = ??/molar mass H2O. mols MgSO4 = 0.68/molar ...

Biosci 101
Hi there :)I was just wondering if you knew how the lac operon theory works? And if there are any good websites for this? This is the best one I could find. http://www.dartmouth.edu/~cbbc/courses/bio4/bio4-lectures/ProkGeneControl.html Most sites discuss "operon theory&qu...

Biology
i need to understand how draw a kite diagram. Any good websites would be helpful Thank you for using the Jiskha Homework Help Forum. Hopefully, you mean the botanical chart:

physics conclusion
im not quite sure what to write for my conclusion for this physics experiment. The aim is to record measurements and carry out calulations with the correct number of figures. We had to take a brass rod and measure its width with vernier calipers which was 19.0 mm and its lengt...

Chemistry
enthalpy of combustion kj mol H2 + 1/2 o2 = h20 + 286 kJ how much did you see? 62.4 ml H2 1 mol of any gas at NTP = 24.5 L You need to clarify your question. Also define NTP.

Chemistry
Hoffmans apparatus find out the energy available per mole of water if it is split into h2 and o2 Data 1 mol of gas at NTP is 24.5l 31.2ml of _______ 62.4ml of _______ it looks like this question comes from a lab experiment. You have not provided all the details needed. Were yo...

Science/maths
what are some problems you might encounter when a)finding the volume of a rugby ball b)finding the diameter of a tennis ball c) finding the mass of a grain of sugar can you help me then I help you please w/b a) submerge it in water in a graduated container and find its volume...

Science/maths
describe how you could make the following measurements and discuss any problems you might encounter a) finding the volume of a rugby ball b) finding the diameter of tennis ball. c) findin the mass of a grain of sugar a) submerge it in water in a graduated container and find it...

english essay
Here is a sample outline for the essay: Introduction: Topic: male/female communication Comparison of two articles (state article names) state thesis Body: Summarize both articles Comapare and contrast both articles argue for which one is better provide examples and analysis Co...

english essay
Thanx alot again. Writeacher, Jenna, jk1115, for all your help thank you so much. Introduction: Topic: male/female communication Comparison of two articles (state article names) state thesis... i need help on this... What are the titles of the two articles? What main ideas are...

English Essay
When it comes to conversation, husband and wives often have problems that close friends of the same sex don't have. First, they may not have much to talk about, and second when they do talk. misunderstanding s often developed that lead to major fights. our research conclud...

English Essay
hello everyone...all my time spent on net surfing for if i can find some help with my HM essay....on Man to Man/Women to Women. please if someone can help out with this..i really appreciated. i m not really good on writing essay but i m looking for some help on this some ideas...

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