Saturday
December 10, 2016

# Posts by vicky

Total # Posts: 279

physics
I just need to know what formula i need to use
December 6, 2016

physics
In the circuit we have E=48V, R=6 ohm and L=4H. We close the switch at the instant t=0, the current I in the circuit grows from zero to its maximum value Io, and the permanent phase is established. A) determine the value of Io. B) calculate the values of the potential ...
December 6, 2016

physics
The self induced e.m.f created in a coil has the value of 24mV at the instant when the current is 4A and varies at the rate of 10A/s. What is the value of the self magnetic flux kn the coil at this instant?
December 6, 2016

chemistry
For the equilibrium: H2 + I2 <=> 2HI The equilibrium konstant Kc is equal to 50.5 at 448ºC. If [H2]o=[I2] o= 1 mol/l. What will the concentration of H2, I2 and HI be at equilibrium
November 4, 2016

science
HOW MANY ATOMS OF OXYGEN ARE PRESENT IN 8.8G OF CARBON(IV)OXIDE
October 30, 2016

physics
The characteristics of a horizontal and undamped spring-block system are k=400N/m and M=0.3kg.The position of the block is determined by its abscissa along an x'ox axis. When the spring has its natural length then x=0. a) the spring is stretched by shifting the block by 10...
October 21, 2016

chemistry
what is the type of catalyst that corresponds the use of the platinum wire
October 16, 2016

physics
A semi circular rail of horizontal diameter AB=2R is placed in a vertical plane. Two particles S1 and S2 of respective masses m1 and m2 (m1 <m2) slide without friction on the inner surface of this rail. A) Particle S1 is released at point B without initial velocity ....
October 7, 2016

physics
A rope of mass M uniformly distributed along its length L ,can slide without friction on a horizontal table. At instant to=0 the hanging part of the rope has a length b and the rope is held at rest .When it is left the rope begins to slide. At instant t the part of the rope ...
September 22, 2016

physics
A pendulum is formed of a particle of mass 100g suspended from the end of an inextensible string of negligible mass and of length L=100cm. The pendulum is shifted by an angle of 60 degrees from its equilibrium position about a horizontal axis passing through the other end of ...
September 21, 2016

physics
in part b we do G.P.E=E.P.E ?
September 21, 2016

physics
we launched a solid of mass m on an inclined slide. The natural length of the spring is Lo. Before launching, the spring is compressed to a length L. After launching the center of mass of the solid reaches the point A of altitude Z with velocity v. Neglect friction. a) ...
September 21, 2016

physics
A pendulum is formed of a particle of mass 100g suspended from the end of an inextensible string of negligible mass and of length L=100cm. The pendulum is shifted by an angle of 60 degrees from its equilibrium position about a horizontal axis passing through the other end of ...
September 21, 2016

physics
Two particles A and B of respective masses M(B) and M(A) are connected together by means of an inextensible string of negligible mass. The string passes over the groove of a pulley of negligible mass. At instant to=0 the system S(pulley,mass,string) is left without initial ...
September 20, 2016

physics
A particle C can move along a slide placed in a vertical plane. Points A and B are at the same horizontal level. Determine with respect to B the point where the velocity of C is zero for the first time in the three following cases: a) C is released from A without initial ...
September 20, 2016

One more Social Studies Help
Why did the British feel justified imposing the Stamp Act on the colonists? Select two. a. Similar stamp taxes were already used in England and Europe. b. The taxes protected colonists from Native Americans. *** c. Britain had spent money protecting colonists from the French...
August 31, 2016

Social Studies Help ASAP
Thank you. I just didn't trust with "kay." People outside of this tutoring community can lie to you. Again, thanks!
August 31, 2016

Social Studies Help ASAP
Why did the British want to expand control into the Ohio Valley in the mid-1700s? a. to force the French out of North America b. to put French settlers there under English rule c. to demonstrate Britain’s strength to France and Spain d. to gain access to the region’s...
August 31, 2016

math
How much talk time if call costs 36 cents a minute and i have 30 dollars?
July 28, 2016

chemistry
How could you prepare: a ) 2-chloropropane from 2-propanol? b) 2-butanone from 2-butanol? c) ethyl acetate CH3COOC2H5 from ethanol? d) 2-methyl-2-butene from 3-methyl-2-butanol?
June 27, 2016

math
Let f be the function defined on {-3, 1} by f (x)= (x+1)/x^2+ax+b and (C) its representative curve in an orthonormal system . Knowing that the two lines of equations x=1 and x=-3 are asymptotes to (C) calculate the values of a and b.
June 23, 2016

Statics
Thanks Reiny
June 17, 2016

Statics
In a first semester unit there are four tests each of equal weight i.e. each worth 25%. Your average on the first three tests has been 62%. You need to get an overall average of 65% to proceed to the second semester. What percentage should you try to get on the fourth test? ...
June 17, 2016

math
A tank is 5/7 full, when 440 litres are removed it goes to 2/5. How much litres does it contain in full capacity
June 4, 2016

The magnetic field strength along the axis (x'ox) of a solenoid is measured ( o being the center of the solenoid). The adjacent graph represent the length: (The graph represents the variation of B (mT) as a function of x (cm). The numbers on the y axis are 1 2 3 and on the...
May 18, 2016

plz help physics!!!!
A proton is moving in vacuum along a straight path from A to B .It passes point A at the speed of 2000km/s. a)Calculate in J and in eV the kinetic energy of the proton at A. b)Calculate the value of the positive voltage U that should be applied between A and B so that the ...
May 3, 2016

plz help physics
A proton is moving in vacuum along a straight path from A to B .It passes point A at the speed of 2000km/s. a)Calculate in J and in eV the kinetic energy of the proton at A. b)Calculate the value of the positive voltage U that should be applied between A and B so that the ...
May 3, 2016

Physics
q=cu find the charge of the first capacitor the find the equivalent capacitance of the parallel and q=c<?>(100) U(AB)=VA-VB
April 24, 2016

life orientation
Life orientation
April 17, 2016

physics
An air condenser has an area of 100 cm^2 the plates being 4mm apart. It is connected in series with another condenser having plate area of 20cm^2 plates being separated by dielectric 0.1mm thick with E=2.5. If the potential difference across an condenser is 1000volts; find the...
April 12, 2016

physics
An air condenser has an area of 100 cm^2 the plates being 4mm apart. It is connected in series with another condenser having plate area of 20cm^2 plates being separated by dielectric 0.1mm thick with E=2.5. If the potential difference across an condenser is 1000volts; find the...
April 12, 2016

geometry
Where are the angles
April 5, 2016

math
I guess you could do cross multiply but the first sentence wasn't clear
April 4, 2016

geography
A sea is a large body of salt water that is surrounded in whole or in part by land. More broadly, "the sea" is the interconnected system of Earth's salty, oceanic waters—considered as one global ocean or as several principal oceanic divisions...
April 4, 2016

chemistry
Consider an isomeric mixture of alkenes of molar mass M=70g/mol. Determine the molecular formula of the alkenes.
March 18, 2016

Two point charges q and q' are placed respectively at two points A and B. Let O be the midpoint of [AB]. Charge q placed at A creates at O an electric field of strength E=9×10^6 V/m. Determine the resultant electric field at O when:  a) q'=q  ...
March 15, 2016

Two point charges q and q' are placed respectively at two points A and B. Let O be the midpoint of [AB]. Charge q placed at A creates at O an electric field of strength E=9×10^6 V/m.  Determine the resultant electric field at O when:  a) q'=q  ...
March 15, 2016

Two point charges q and q' are placed respectively at two points A and B. Let O be the midpoint of [AB]. Charge q placed at A creates at O an electric field of strength E=9×10^6 V/m. Determine the resultant electric field at O when: a) q'=q b) q'=-q
March 15, 2016

Multiple choice (show your work if any):  1) Two point charges q1=-10^-5 C and q2=-9×10^-5 C are placed respectively at two points A and B 40 cm apart.   The electric field is null at a point C outside [AB] such that :  a) AC=50cm b) AC=30cm c) AC=20cm d) ...
March 15, 2016

Trig help
From my knowledge: #=alpha Sin: x=#+2kpi and x=pi-#+2kpi When u come out with the value of sine (alpha) you place it in the both cases and then you put it in the interval 0 <#+2kpi <2pi
March 15, 2016

Multiple choice (show your work if any):  1) Two point charges q1=-10^-5 C and q2=-9×10^-5 C are placed respectively at two points A and B 40 cm apart. The electric field is null at a point C of [AB] such that :  a) AC=50cm b) AC=10cm c) AC=20cm d) point C ...
March 14, 2016

Multiple choice (show your work if any):  1) Two point charges q1=-10^-5 C and q2=-9×10^-5 C are placed respectively at two points A and B 40 cm apart. The electric field is null at a point C of [AB] such that :  a) AC=50cm b) AC=10cm c) AC=20cm d) point C ...
March 14, 2016

Multiple choice (show your work if any): 1) Two point charges q1=-10^-5 C and q2=-9×10^-5 C are placed respectively at two points A and B 40 cm apart. The electric field is null at a point C of [AB] such that : a) AC=50cm b) AC=10cm c) AC=20cm d) point C doesn't ...
March 14, 2016

chemistry
The analysis of halogenated hydrocarbon gave the following results: A sample of mass m=255mg produces 273.7 mg carbon dioxide and 130.6 mg of water .A second sample of mass 87 is treated by hot molten sodium .The obtained mixture is dissolved in distilled water and filtered ....
February 20, 2016

english
The question is Explain the function of the first four paragraphs of the reading text The name of the text is The Machine Could Save Your Life by Malcolm Mcconnell
February 8, 2016

Social Studies
4 c 5 a or c
February 8, 2016

chemistry
25ml of 0.01M KIO3 solution were put to react with an excess of KI. 32.04ml of the sodium thiosulfate solution were needed to titrate the triiodide ions that were present . What is the molar concentration of thiosulfate in the solution?
February 7, 2016

maths
28 is divisible by 2 and also 90 28÷2 14 --- = --- 90÷2 45
February 7, 2016

Maths
Probability= #of favorable cases ------------------------ # total possible
February 6, 2016

physics
A disk is free to rotate around its fixed axis of revolution (delta). The moment of inertia of disk around delta is J=4×10^-2 kg.m^2 This disk is initially at rest is submitted to the action of a couple whose moment is equal to 0.2 N.m What's the ...
February 4, 2016

y=1/2gt^2+vsin (35) y=1/2×10×2.7^2+15×sin (35) y=30.02m
February 4, 2016

Find the area of a sector of a circle that has a central angle of 3π/8 and a radius of 7 cm.
January 31, 2016

chemistry help
A solution of thiosulfate ions has been prepared by dissolving 4.5g of Na2S2O3.5H2O in 250 ml of solution. Calculate the concentration of the thiosulfate ions S2O3^2- in the solution
January 17, 2016

math
how to calculate vertical angle of cone
January 10, 2016

math
how to calculate vertical angle of cone
January 9, 2016

English
How do i go about writing an essay whose topic is "Sports- General, types of fans and influence on culture?"It is under classification and division in Successful College Writing.
January 5, 2016

Homeschool
A ibc with no lid is made by cutting four squares if side length x from each corner of a 10 cm by 20 cm rectangle sheet of metal. Sketch the graph of the function and state restriction 250 200 150 100 50 -5. 5. 10. 15 -50 -100 -150 -200 -260
September 30, 2015

math
what is the global maximum of the parabola y= -x^2 -12x +4
April 18, 2015

math
(4n-1)^2=16
April 7, 2015

French
thank you
December 2, 2014

French
Whats the partitive article for Je n'ai pas gateau?
December 2, 2014

MATH
thank you
December 1, 2014

MATH
Mimo wishes to leave a waitress a tip. Mimo has five coins in his pocket, a penny, a nickel, a dime, a quarter, and a half-dollar. If he uses exactly three coins for the tip, how many different tips are possible? A. 15 B. 5 C. 20 D. 10 Crystal wants to put a fence around her ...
December 1, 2014

Math help
Mimo wishes to leave a waitress a tip. Mimo has five coins in his pocket, a penny, a nickel, a dime, a quarter, and a half-dollar. If he uses exactly three coins for the tip, how many different tips are possible? A. 15 B. 5 C. 20 D. 10
December 1, 2014

Math help
Sorry I posted the wrong answer I will post it again meanwhile can you help me with the second question thanks?
December 1, 2014

Math help
How many squares in this figure? (1 point) 4.) 15 5** 20 10** Crystal wants to put a fence around her vegetable garden.Her garden is 5 ft wide and 4 ft long.She plans to put a post at each corner and at every foot.How many fence posts will Crystal need? (1 point) 14 posts 18 ...
December 1, 2014

Language Arts
1.)Which of the following sentences contains parallelism? a.)We sold two bikes at the garage sale, and we also sold four chairs, as well as receiving offers for three lamps. b.)I prefer new things, but some people like to buy things that other people have owned. c.)A garage ...
November 24, 2014

social studies
Thank you Ms.Sue
October 29, 2014

social studies
Why did the British have problems after the French and Indian War? a.)they had less territory than before the war b.)they no longer had native american allies c.)they were faced with a devastating natural disaster after the war ended d.)they were left with a large public debt ...
October 29, 2014

nutrition
What is the answer to the rest
October 27, 2014

physics
a vehicle is accelerating on a straight road. Its velocity at any instant is 30 km/hr, after 2 s, it is 33.6 km/hr and after further 2 s, it is 37.2 km/hr. Find the acceleration of vehicle in m/s^2
June 10, 2014

math 1 question!!!!!!
c you idiot
June 3, 2014

American History
Which of the following statements is most accurate regarding America's political climate between 1876 and 1896? A. Southern states tended to vote Republican. (B.) The influence of the president over Congress diminished. C. The party that won the presidential election also ...
May 31, 2014

Social Studies
If you were a reform-minded person who, above all, loathed the social problems associated with alcohol, you would have been especially sympathetic to the A. Comstock Law. (B.) WCTU. C. Mugwumps. D. evangelical efforts of Dwight L. Moody. I chose B is this right?
May 29, 2014

math 6 probability
75 sorry
May 21, 2014

math 6 probability
May 21, 2014

math
Telephone company A charges \$3.00 for the first minute of any long distance call and \$0.50 for each additional minute. Telephone company B charges \$2.00 for the first minute of any long distance call and \$0.70 for each additional minute. If the cost of a call lasting x minutes...
May 8, 2014

anatomy
For my anatomy class, I need a to make a human bone such as a femur or any other bones in the human body. Any suggestions on a website?
March 17, 2014

health care
It has to be a power point presentation on the cons of breaking bad news medically
March 11, 2014

health care
I have to do a debate on breaking bad news medically. I have the con side to it. Can you recommend some sites
March 11, 2014

english
I have to write a research paper on why ernest hemingway would be a good author for college students to ready. Any suggestions on where to start?
March 10, 2014

chem
Consider the following neutralisation reaction: 2 H3PO4(aq) + 3 Ca(OH)2 (aq) → Ca3(PO4)2 + 6 H2O Determine the volume of 0.75 M H3PO4 necessary to neutralise 35 ml of 0.45 M Ca(OH)2
February 8, 2014

math
Todds weight dropped from 220 pounds to 190 pounds. Cassidys weight dropped from 150 pounds to 135 pounds. Who had the greater percent weight loss?
November 13, 2013

math
the number of students at a university increases from 8000 in 1970 to 20,000 in 2000. what was the percent increase in enrollment from 1970 to 2000?
November 13, 2013

math
in a survey of 1,500 people who owned the same make of car, 600 indicated that they would buy the same make of car again. What percent of these people were satisfied with their car?
November 13, 2013

Math
It says the answer is 4800 but I don't know how they arrived at that answer
November 13, 2013

Math
at a large state university, 60% of the students who apply are accepted. Of those who are accepted, 40% actually enroll. If 20,000 students apply, how many actually enroll?
November 13, 2013

Math
No clue peeps
September 24, 2013

critical thinking
9. We shouldn’t take a chance on this new candidate. She’s from Alamo Polytech, and the last person we hired from there was rotten. Trying to figure out the Premise and Conclusion. Premise: She's from Alamo Polytech, the last person we hired from there was rotten...
September 2, 2013

math
calculate , in newtons correct to the nearest unit, the force necessary to maintain a body of mass 2kg in uniform angular speed of 2rev/s in a circle of radius 0.2m
June 14, 2013

math
calculate,in terms of weight of 1kg, the force necessary to maintain a body of mass 147kg in uniform speed of 10m/s in a circle of radius 5m
June 14, 2013

randy had saved 5000 in an account that offered r% simple interest per annum on 20 march 2008. If the interest on 6 june 2008 was 40, find the exacttime of the investment
April 22, 2013

Spanish
Hi! I did the work but I'd like to know if my answers are right; we were supposed to answer these questions with complete sentences: 1. ¿Alguna vez has comido insectos? Answer: Afortunadamente, no he comido insectos. 2.¿Cuánto tiempo has estudiado espa...
March 5, 2013

Spanish
Hi! I did the work but I'd like to know if my answers are right; we were supposed to answer these questions with complete sentences: 1. ¿Alguna vez has comido insectos? Answer: Afortunadamente, no he comido insectos. 2.¿Cuánto tiempo has estudiado espa...
March 5, 2013

English 12
I am looking into the ther character the Wife of Bath
February 19, 2013

English 12
I am looking at Chaucer's treatment of women in the Canterbury Tales. I don't know where i should start my research. Please help.
February 19, 2013

English 12
I am looking at Chaucer'streatment of women. I don't know where i should start my research
February 19, 2013

English 12
I am doing a literary research paper on chaucers canterbury tales. I need help in writing my thesis for this paper also i can not figure out a topic.
February 19, 2013

english
I am looking to do a literary research paper for english on the fairy tale snow white and the 7 dwarfs. I do not know how to begin my research.
February 18, 2013

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