Questions Asked on
July 13, 2013

chemistry
When 85.0 g of CH4 are mixed with 160. g of O2 the limiting reactant is __________. CH4 + 2O2 ¨ CO2 + 2H2O A) CH4 B) O2 C) CO2 D) H2O

physic
A force F⃗ = 12 N i^ − 10 N j^ acts on an object. How much work does this force do as the object moves from the origin to the point r⃗ = 13 m i^ + 11 m j^?

physics
A board that is 20 cm wide, 5 cm thick, and 3 m long has a density of 350 kg/m^3. The board is floating partially submerged in water do density 100 kg/m^3. What fraction of the volume of the board is floating above water?;

physic
Planet A and planet B are in circular orbits around a distant star. Planet A is 4.5 times farther from the star than is planet B. What is the ratio of their speeds vA/vB?

chemistry
When 3.05 moles of CH4 are mixed with 5.03 moles of O2 the limiting reactant is __________. CH4 + 2O2 ¨ CO2 + 2H2O A) CH4 B) O2 C) CO2 D) H2O

math
A. Brad is 12 years older than Sam . If Brad were 8 years older than he is now. he would be twice as old as Sam. How old is Sam now? B. Barrie is now 2 years older than Krista. In 15 years Barrie's age will be 2 years more than twice Krista's age now. How

statistics
A physician routinely makes physical examinations of children. She is concerned that a threeyearold girl has a height of only 87.8 cm. Heights of threeyearold girls have a mean of 97.5 cm and a standard deviation of 6.9 cm (based on data from the

Calculus
A rancher wants to make a rectangular pen to house her animals. She will divide it up with 3 fences down the middle parallel to one side. If she has 14000 ft of fencing to work with, what are the dimensions of the pen of greatest area? Width = Length =

math
A. A woman was 30 years old when her daughter was born.Her age is now 6 years more than three times her daughter's age. How old will the daughter be in 5 years? B. Lisa is 15 years old and her father is 40. How many years ago was the father six times as

chemistry
The formation constant of [M(CN)6]4– is 2.50 × 1017, where M is a generic metal. A 0.170mole quantity of M(NO3)2 is added to a liter of 1.51 M NaCN solution. What is the concentration of M2 ions at equilibrium?

biology
Certain spider toxins work by inhibiting Ca2+ channels. Briefly explain how this works and what happens to the person.

Physics
A 1.2 kg object is moving with a speed of 8.0 m/s collides perpendicularly with a wall and emerges with a speed of 6.0m/s in the opposite direction perpendicular to the wall. If the object is in contact with the wall for 2.0m/s. What is the magnitude of

leadership
Prior to the industrial revolution the study of leadership relied on a scientific studies b. intuition and description c. case analyses d. the trait approach to understand leaders

Chemistry
Calcium reacts with nitrogen to form calcium nitride. Indicate which reactant is limiting, calculate the mass of calcium nitride formed when 50.0g of calcium reacts with 50.0g of Nitrogen. How much excess reactant do you have?

Chemistry
What mass of AgI can be produced from a 0.512g sample that assays 20.1% ALI3?

math
A. John is now 10 years older than Marcus. Three times John's age 5 years from now will be the same as five times Marcus's age 5 years ago. How old is John now? B. In 1 year Kristen will be four times as old as Danielle. Ten years from then Kristen will

math
xy+z=3 2xy+z=4 x+2yz=1 solve in GausJordan method

Chemistry
If the Ka of a monoprotic weak acid is 4.5x10^6 what is the pH of a .10M solution of this acid. I don't even know how to start this problem, I'm totally lost please help!

biology
1. Enzyme competition occurs when: A. one type of enzyme reacts with one type of substrate. B. an enzyme does not react with a substrate. C. three different types of enzymes react with one type of substrate. D. an enzyme stops a reaction. is it C 2. The

statistical reasoning
A new startup company intends to compete with nielsen media research by providing data with a larger margin of error for the same price

geometry
tan (?) = 3.5

Physics
A 2.4kg ball falling vertically hits the floor with a speed of 2.5m/s and rebounds with a speed of 1.5m/s. What is the impulse exerted on the floor?

accounting
can someone please help me understand how to perform vertical analysis

multiplying
15xy (x=y)

anatomy & physiology
compare and contrast the two feedback mechanisms our bodies use to maintain homeostasis.What would happen if our thermoregulation (temperature control) used a positive feedback to maintain homeostasis?

physic
A Ferris wheel 26.0m in diameter rotates once every 15.0s . What is the ratio of a person's apparent weight to her real weight at the top?

Physics
A large number of AA batteries with emf E=1.5 V and resistors with resistance R form an infinite circuit . The internal resistance of the batteries is r. Thevenin's theorem tells us that this infinite circuit can be replaced by a single source with emf

Calculus
Find the point on the line 7x+5y−2=0 which is closest to the point (−6,−2).

Physics
2. Determine the quantity of heat required, to raise 11.100kg of water at 80.000 degrees Celsius, to saturated steam at 2250.000kPa and 71.400% dry. ANS = kJ Not sure where to start. I need a little help please. I do have a chart with the properties of

Math
each of 5 basketball teams in a league played N games with each of the 4 other teams. If no games were played outside the league, which of the following could NOT be the number if games played by one team? A. 8 B. 14 C. 16 D. 20 E. 32

Earth science
The following questions are based on the “Mt. Dome, California,” quadrangle (Figure 332 found on page 228 of the Laboratory Manual; enlarged to scale 1:48,000; contour interval 40 feet) and the stereogram of the same region (Figure 333 found on page

Psychology
5. Why is confidentiality critical in counseling? (I chose D) A). Clients often share information that is incriminating. B). In order to build a trusting relationship, the client and the counselor need to share privileged information. C). Clients need to

trig
simplify the expression. sin^2xcos^2x

Helpp!!! physic...
In the experiment Standing Waves,if you continue to lwer the water level after recording l(m) at the first sound resonance at fixed tuning fork frequency, you will hear the sound again but sound gets louder (second resonance). At this point, by what factor

General Chemistry
Write the competing equilibrium that will occur when a strong acid is added to the following equilibrium: Ca (aq) + C2O4 (aq) > CaC2O4 (s)

General Chemistry
H2 (g) + I2 (g) > 2HI (g) What would happen to the amount of iodide present if hydrogen iodide is added? Removed? The volumeof the system is decreased? I got increase, decrease & same as my answer, but I don't completely understand it. Please help.

Bio
1. Some people get repeated fungal infections because they cannot destroy these dangerous microbes after their white blood cells phagocytize them. This most likely means that these people have __________ that do not work properly. A. ribosomes B. lysosomes

algebra 1
Which of the following would eliminate the variable on the left side of the given equation? 36  19w = 6w + 41

algebra 1
Which of the following equations has the given solution set? Solution set: Ø

algebra 1
What is the solution set of the given equation? 4y  6y + 9y = 2

math
the trip took 2 hours longer to cover the 160 miles than it took to come back. if the total time of the round trip was 6 hours, what was the rate going and what was the rate coming back?

Physics
HW8_1: CANTILEVERED BEAM WITH TAPERED SQUARE CROSS SECTION A cantilevered beam of length L has a square cross section of side length linearly varying from hA at the free end to hB=3hA, at the fixed support. A concentrated load, P, is applied at the free

Mass Media Public Law
In the aftermath of the 9/11/2001 terrorist attacks on America, and the resulting War on Terrorism by the United States, what do you think is the reasonable and legal limitations on the First Amendment?

Thermodynamics
2. Determine the quantity of heat required, to raise 11.100kg of water at 80.000 degrees Celsius, to saturated steam at 2250.000kPa and 71.400% dry. ANS = kJ Not sure where to start. I need a little help please. I do have a chart with the properties of

Thermodynamics
1. The total enthalpy of 15.000kg of steam at 2250.000kPa is 34191.510kJ. Determine the dryness of the steam. ANS = % Not sure where to start. I need a little help please. I do have a chart with the properties of saturated steam. Thank you.

statistics
Test consist of 10 multiple choice questions each having 4 possible answers one being correct. you guessed all 10 what is the probability of getting less than 30%

College Algebra
10x^2(x8)^1/3 + 15x(x8)^4/3

statistics
participant on tv show picke from lage # applicants with equal number of men and woman .amongst the last 9 participant 7 have been women . if they are picked randomly what is the probability of geting 7 more women when 9 people are picked

statistics
Playing game of chance and pay 300 by rolling a fair die one time if you rome a 2 and receive $1300 if you roll a 4 or six you receive $900 if you ore a 3 5 or 9 receive nothing. find expected value for this game. based on value is it a good game to play?

earl marriot secondary
what is the concentration of the ions in 0.20M Na2CrO4?

English
1. I went to Fukuoka, Japan. 2. I went to Fukuoka in Japan. (Which one is correct and commonly used?)

ESL English
I am teaching ESL students. How can I improve my teaching skills?

chemistry
An element with body centred cubic structure.Edge length is 400pm.Calculate the density of element.Atomic Mass of element is 100u?

chemistry
write a balanced equation for the chain reaction AL2O3

Physics Please Answer
A helium ion is at rest in a laboratory when it is put in an electric field of E=2 N/C. An infrared light, of wavelength 2000 nm, is directed towards the ion. The ion is moving towards the source of radiation. After what time in the laboratory frame in

Physics
A boy is spinning on a chair and holding a paper bag so that it is horizontal, and perpendicular to the axis of the rotation. What should be the angular velocity of the boy in radians/second so that the bottom of the bag breaks

Thermodynamics
1. The total enthalpy of 15.000kg of steam at 2250.000kPa is 34191.510kJ. Determine the dryness of the steam. ANS = % 2. Determine the quantity of heat required, to raise 11.100kg of water at 80.000 degrees Celsius, to saturated steam at 2250.000kPa and

physic
A satellite circles a spherical planet of unknown mass in a circular orbit of radius 1.9×107m . The magnitude of the gravitational force exerted on the satellite by the planet is 140N . What would be the magnitude of the gravitational force exerted on the

Simplify Math
m^(3/4)/m^(5/4)m^2 hopefully you understand the equation.

phy
A satellite circles a spherical planet of unknown mass in a circular orbit of radius 1.9×107m . The magnitude of the gravitational force exerted on the satellite by the planet is 140N . Part A What would be the magnitude of the gravitational force exerted

Mumford HS
graph on calculator and estimate local maxima and local minima g(x)=1/2x^34x+3

math
A. Four times one odd integer is 14 less than three times the next even integer. Find the integers. B. The average of four consecutive odd integers is 16. Find the largest integer. C. When the sum of three consecutive integers is divided by 9 the result is

mila
Determine the time it takes for a satellite to orbit the Saturn in a circular "nearSaturn" orbit. A "nearSaturn" orbit is at a height above the surface of the Saturn that is very small compared to the radius of the Saturn. [Hint: You may take the

College Algebra
A family drove 1080 miles to their vacation lodge. Because of increased traffic density, their average speed on the return trip was decreased by 6 miles per hour and the trip took 2.5 hours longer. Determine their average speed on the way to the lodge.

Finance Help! 3 questions
8. If the no of level investments be ‘t’, total no of level instalments be ‘n’ and total charge for credit be ‘c’ then the interest rebate is given by………………………………………… answer please

chemistry
A 7.56g sample of gas is in a balloon that has a volume of 10.5 L. Under an external pressure of 1.05 atm, the balloon expands to a volume of 15.00 L. Then the gas is heated from 0.00 degree C to 25 C. If the specific heat of the gas is 0.909 J/g*C, what

trig
use basic identities to simplify the expression. csc θ cot θ / sec θ

Physics
Two resistors 10 Ω and 5 Ω are connected in parallel across a 15 V battery. What is the potential difference across the 10 Ω resistor? Answer 5 V 10 V 15 V 20 V I did the work as follows: 1/Req = 1/10 + 1/5. 1/Req = 0.3/1. Req(0.3) = 1(1). Req = 3.33

math
A skydiver jumps from his aircraft and falls towards earth. Due to the earth’s gravitational attraction, the sky diver will accelerate for a duration of 5.65 secs, at which time he reaches terminal velocity, that is a constant falling velocity of 181

Physics
1. The total enthalpy of 15.000kg of steam at 2250.000kPa is 34191.510kJ. Determine the dryness of the steam. ANS = % Not sure where to start. I need a little help please. I do have a chart with the properties of saturated steam. Thank you.

College Algebra
Find all solutions of the equation. Check your solutions in the original equation. (Enter your answers from smallest to largest. Enter NONE in any unused answer blanks.) 16t^2/3 + 40t^1/3 + 25 = 0

Chemistry. CONVENT
An unknown gas shows a density of 2.39 gms per litre at 100 degrees centigrade and 715 mm presure. Wht is the gram molecular weight of the gas

College Physics
7 Moles of a gas initially at temperature 300 K is compressed adiabatically from a volume of 1000 cm3 to a volume of 316 cm3. To the nearest tenth of a kJ what is the work done by the piston? (It is a monatomic ideal gas.) I have W = (3/2)nRT1(V1^(gamma1)

College Physics
A 7 kg mass hangs on a 10 meter long weightless cord. To the nearest cm, what should the new length of the pendulum be in order that the new frequency be 1.8 times its current value? The correct answer is 309 but I got 250. Heres what I did.. (1/2pi)(sqrt

physic
Determine the time it takes for a satellite to orbit the Saturn in a circular "nearSaturn" orbit. A "nearSaturn" orbit is at a height above the surface of the Saturn that is very small compared to the radius of the Saturn. [Hint: You may take the

College Algebra
Find an equation that has the given solutions. (There are many correct answers.) 1/6, 8/9

Biology
1. Some people get repeated fungal infections because they cannot destroy these dangerous microbes after their white blood cells phagocytize them. This most likely means that these people have __________ that do not work properly. A. ribosomes B. lysosomes

childcare
A study in 2005 showed that 70% of parents felt that their children were too ______ school, family finances, and divorce. A. oblivious to B. confident regarding C. focused on D. stressed about

Psychology
I need someone to review my five answers. Inform me if I am correct with my choices as well as correct me if I answered any of them wrong. Thank you! 1) If one wishes to become a professional counselor and has completed the educational requirements and