Monday
December 5, 2016

# Posts by ed

Total # Posts: 267

Maths
A ball is thrown vertically upwards at 3 m s-1 from 1m above ground level (I) write down the equation for the height of the ball above the ground after t seconds (while the ball is in the air). (II) use your answer to find the time it takes the ball to reach the ground. (iii) ...
November 17, 2016

Maths
a circus artist drops a ball from a high wire. The ball takes 1.5 seconds to reach the ground. (i) Find the height of the high wire above the ground (ii) write an expression for the speed of the ball t seconds after it's dropped where 0<t<1.5 (iii) how fast is the ...
November 17, 2016

math
the gas tank in jocko's car hold 12 gallons when it's full. the car gets 18 mi/ gal. How far can he travel on two full tanks
October 11, 2016

Physics
The sun is 30 ∘ above the horizon. It makes a 54 m -long shadow of a tall tree.
September 8, 2016

math age problem
I am 10 less than four times my age six years ago how old am I now
September 5, 2016

Calculus
Solve the following equation on the interval [0,2pi) if sin = -0.29?
August 21, 2016

Calculate y' and y'' at the point (1,1)
Calculate y' and y'' at the point (1,1) on the curve 5 xy^2+9 y-14 = 0 I got the first part (-5/19) but I can't get the answer for the second
July 12, 2016

Math
Calculate y' and y'' at the point (1,1) on the curve 5 xy^2+9 y-14 = 0 I got the first part (-5/19) but I can't get the answer for the second
July 12, 2016

algebra
2(2)+4y-6=0 4+4y-6=0 4y-2=0 4y=2 y=1/2
June 14, 2016

physical science
you are riding in a car traveling at 60mi/hr in a 50 mi/hr zone. you spot a policeman 10 feet ahead. you slow down with an acceleration of -2ft/sec2 for 3 seconds. Do you get a ticket
June 14, 2016

Chemistry
The gas phase reaction X+Y⇄ Z is first order in Y and second order in X. If the concentration of X is double and concentration of Y is tripled. The reaction rate would be increase by a factor of: then, Rate= k [x]^2[y] --> k[x]^4[y}^3 is this the correct line of ...
June 14, 2016

Chemistry
Methyl amine is a weak base with a pKb=3.35. Consider the titration of 30.0mL of .030M of Methyl amine with 0.025M HCl. a) Write the appropriate equation for the reaction. b) Calculate K for the reaction in part (a). c) Calculate pH of the initial methyl amine solution (0mL ...
April 27, 2016

University physics
"Consider a long charged straight wire that lies fixed and a particle of charge +2e and mass 6.70×10-27 kg. When the particle is at a distance 1.61 cm from the wire it has a speed 2.70×105 m/s, going away from the wire. When it is at a new distance of 2.71 cm...
February 10, 2016

University physics
"A droplet of oil carries an extra charge of one electron and is held motionless between parallel plates separated by 1.80 cm across which there is a potential difference of 55.5 kV. What is the mass of the droplet?" I assumed that this whole thing was actually a ...
February 10, 2016

Definition
Ahem, did you look at the time on both?
February 2, 2016

Definition
Is it A?
February 2, 2016

Definition
In which sentence is the word SPUTTERS used correctly? a.The engine SPUTTERS when it is started in the cold. b.The ball SPUTTERS as it bounces across the court. c.That tree SPUTTERS when it drops its leaves. d.The wave SPUTTERS as it breaks over the beach ***
February 2, 2016

Algebra 2
Mario took a 17 day trip around the U.S. He visited Boston, Miami, Philadelphia and New York. In Boston he spent \$200 per day, in Miami \$225 per day, in Philadelphia \$175 per day and in New York he spent \$150 a day for a total of \$3400. The number of days he spent in Miami was...
November 28, 2015

math
x+4x =60 x boys 4x girls 5x=60 x=12 12 boys, 48 girls
November 9, 2015

World history
What was the biggest change? Where? Why? Japan China Europe Africa
November 9, 2015

there are 4 possible scoring plays in an NFL football game (T) touch down -6 points (A) point after touchdown can only be earn with a touch down) - 1 point (F) field goal - 3 points (S) safety - 2 points 1. how many different ways could the team score 11 points? I think it is ...
November 9, 2015

World history
What development produced the greatest instability? Where? Why? Japan China Africa Europe
November 9, 2015

World history
Thank you
November 9, 2015

World history
Who benefited the least from the development of feudal systems? Explain why Japan China Africa Europe
November 9, 2015

World history
Who benefitted the least from the development of feudal system? Explain why Japan China Africa Europe
November 9, 2015

Electrical theory
a series RL circuit contains two resistors and two inductors. the resistors are 33 ohms and 47 ohms. inductors have inductive reactances of 60 ohms and 30 ohms. the applied voltage is 120 volts. what is the voltage drop on the 33 ohm resistor?
October 28, 2015

math
A brownie cake recipe requires 2 1/2 cup of sugar. The amount of flour needed is 1/2 cup more than twice the amount of sugar. How much flour is required?
May 14, 2015

Math
Twice the square of a positive number increased by three times the number is 14. Find the number.
May 12, 2015

Math
It's 2 M :)))))))))))
May 12, 2015

Math
Thanks :)
May 12, 2015

Physic
0.00043
January 30, 2015

math
80 boys used 60 loaves in 12 days. 120 boys needs loaves for 18 days. How many loaves will be needed?
January 19, 2015

math
A mass on the end of a spring which is hanging vertically is raised up and let go. It then oscillates between 2m and 1.5m above the floor and completes 32 cycles in one minute. The height, h metres, of the mass above the floor after t seconds can be modelled by the function h...
November 27, 2014

word problem
suppose a car rental charges 94 dollars for the first day and 44 dollars for each additional or partial day.let S(x) represent the cost of renting a car for x days .find the value of S(5.5)
November 22, 2014

Which of the following best states the difference between seed capital and startup capital? Seed capital is for research and planning while startup capital is for operating expenses. Seed capital is provided by venture capitalists while startup capital is provided by banks. ...
November 12, 2014

November 12, 2014

Finance
Which of the following best states the difference between seed capital and startup capital? Seed capital is for research and planning while startup capital is for operating expenses. Seed capital is provided by venture capitalists while startup capital is provided by banks. ...
November 12, 2014

Physic
Work is done when.
November 2, 2014

Math
Thank you!
September 22, 2014

Math
yes, \$450
September 22, 2014

Math
Jason is a salesperson in the electronics department store. He is 38% short of his goal for the week. His goal is to earn %450. For each CD player he sells, he earns \$57. How many CD players does he need to sell in order to meet his goal?
September 22, 2014

physics
A truck driver slams on the brakes and the momentum of the truck changes from ‹ 53000, 0, 0 › kg · m/s to ‹ 27000, 0, 0 › kg · m/s in 3.3 seconds due to a constant force of the road on the wheels of car. As a vector, write the net force ...
September 11, 2014

math
a dog starts chasing a cat when they are 12 meters. for every 7 meters that the dog runs, the cat runs 4 meters. how far does the dog have to run to catch up with the cat?
May 22, 2014

Economics
increase the money supply and encourage economic growth.
May 22, 2014

economics
What would be the present value of an item that has a salvage value of \$25,000 at the end of four years? Assume a discount rate of 3.8% for an end-of-year factor. Carry calculations to four decimal places. \$25,950 \$24,085 \$20,747 \$21,535
May 8, 2014

statistics
A researcher is testing the effect of a new cold and flu medication on mental alertness. A sample of n=9 college students is obtained and each student is given the normal dose of the medicine. Thirty minutes later, each students performance is measured on a video game that ...
April 29, 2014

College Math
In a group of 200 high school students, 36 are taking biology, 52 are taking Spanish, and 126 are taking neither biology nor Spanish. If one of these 200 students is to be chosen at random, what is the probability that the student chosen is taking biology but not Spanish?
March 19, 2014

Pre-Algebra
You have \$60 in your wallet and want to buy some new CDs. If the CDs are \$11 each, what number of CDs, x, can you buy? Write and solve an inequality. Then explain your answer.
January 16, 2014

Math ~CHECK MY WORK~
oh ok...... wow thnx
January 16, 2014

basic electronics
What would happen if the two pith balls shown in Figure A-1 were held together for a few moments, then released? A. The charge would leak off and the pith balls would hang straight down. B. The pith balls would each receive a negative charge and they would move apart. C. The ...
January 16, 2014

programming
#include <iostream.h> #include <conio.h> void main() { clrscr(); int x = 10; int y = 2; int sum, difference, product, quotient; sum = x + y; difference = x - y; product = x * y; quotient = x / y; cout << "The sum of " << x << " & &...
December 23, 2013

math
Kristy read 40 pages of a book on Saturday. She read Test Image as many pages on Sunday. Which numerical expression could be used to calculate the number of pages Kristy read on Sunday?
November 18, 2013

physics
The maximum gauge pressure in a hydraulic lift is 18 atm. What is the largest size vehicle (kg) it can lift if the diameter of the output line is 22 cm?
November 18, 2013

Draw a representation of the resulting equilibrium mixture when ammonia is added to water. The equilibrium constant,K, is a small number for this reaction so represent that in your drawing.
September 24, 2013

Microtomy
I need to infiltrate a sample block of wood for sectioning on a microtome. The formula for the infiltrating media is 70% Ethylene Glycol 1500 and 30% Lauric acid. Both components are in a powder form. The instructions don't indicate whether this is supposed to be a weight/...
August 3, 2013

math
a musical triangle has a perimeter of 180 mm. the side of middle length is 2 times as long as the shortest side. the longest side is 3 times as long as the middle side. how long is each side
May 6, 2013

math
I am not all those people
May 4, 2013

math
I am supposed to find the area of a segment of a circle. The circle is cut with two radi with an angle of 90 degrees. Then where the radi touch the circle another line is drawn to connect them. The triangle and the small section between the triangle and the edge of the circle ...
May 4, 2013

Physics
A car with engine trouble slides 85 meters up along a 14 degree ramp before coming to a stop. If the coefficient of friction between the tires and the road is 0.9, what was the velocity of the car at the bottom of the ramp? I'm not looking for a solution which includes ...
March 10, 2013

Physics101
1. 20.0
February 23, 2013

Physical Science
Predict how each of the following changes will affect the following reaction involving gaseous reactants and products: 2NO2 = N2O4 + heat a. the temperature is increased. b. the pressure is increase. c. N2O4 is removed from the equilibrium mixtur. d. NO2 is added to the ...
February 8, 2013

Physical Science
Predict the shift of equilibrium for each of the following conditions in the following reaction involving gaseous reactants and products: N2 + 3H2 = 2NH3 + heat A. the pressure is increased. b. the temperature is decreased.
February 8, 2013

Physical Science
Predict the shift of equilibrium for each of the following conditions in the following reaction involving gaseous reactants and products: N2 + 3H2 = 2NH3 + heat
February 8, 2013

math
a frame with a 19"permitter and 2"wide what is the length of this frame and what is the area.
January 30, 2013

math
a frame with a 19"permitter and 2"wide what is the length of this frame and what is the area.
January 30, 2013

programming
#include <iostream.h> #include <conio.h> void main() { clrscr(); int x = 10; int y = 2; int sum, difference, product, quotient; sum = x + y; difference = x - y; product = x * y; quotient = x / y; cout << "The sum of " << x << " & &...
January 29, 2013

A agrees to buy such fruits and vegetables as it "might desire" from B. Does this promise to buy obligate B in anyway?
January 27, 2013

Physics
Ted Williams hits a baseball with an initial velocity of 120 miles per hour (176 ft/s) at an angle of θ = 35 degrees to the horizontal. The ball is struck 3 feet above home plate. You watch as the ball goes over the outfield wall 420 feet away and lands in the bleachers...
January 18, 2013

math
A random group of seniors was selected from a university and asked about their plans for the following year. The school advising office claims that 60% of the students plan to work, 30% of the students plan to continue in school, and 10% of the students plan to take some time ...
December 16, 2012

math
A right-tailed test is used when .
December 1, 2012

math
Are the following statements and valid null and alternative hypotheses? (
December 1, 2012

Math/statistics
Are the following statements and valid null and alternative hypotheses? (
November 23, 2012

math
If two dice are rolled one time, find the probability of getting a sum less than 5.
November 17, 2012

math
Construct a frequency polygon distribution using the class limits shown below. 80, 99, 77, 67, 93, 70, 76, 86, 79, 71
November 17, 2012

physics
Initially, a particle is moving at 5.30 m/s at an angle of 35.0° above the horizontal (+x axis). Two seconds later, its velocity is 5.97 m/s at an angle of 50.0° below the horizontal. What was the particle's average acceleration during this time interval? ________m...
November 10, 2012

direct an inverse variation
Since the number of books checked out varies directly with the number of book reports assigned we have the following relationship: Let B be the number of books checked out and R be the number of reports due. Then because R and B vary directly there is a constant K so that B = ...
October 10, 2012

statistics
The following is the tabulated data of the monthly commissions of the sales employees at La Verne Inc. Establish the frequency distribution. Present the data in a histogram format, draw the frequency polygon and the ogive (or cumulative polygon)
September 16, 2012

statistics
The following is the tabulated data of the monthly commissions of the sales employees at La Verne Inc. Establish the frequency distribution. Present the data in a histogram format, draw the frequency polygon and the ogive (or cumulative polygon)
September 16, 2012

math
15 ft
June 1, 2012

math
how fast are 13 inch trailer tires going when my truck is going 55mph with 15" tires
May 13, 2012

chemistry
the volume of a gas was originally 2.5 L; it's pressurewas 104kpa and its temperatire was 270K. the volume of the gas expanded to 5.3 L and its pressure decreased to 95 kpa. What is the temperature of the gas?
May 8, 2012

statistics
from generation to generation, the average age when smokers first start to smoke caties. however, the standatd deviation of that age remains constant of around 2.1 years. a survey of 40 smokers of this generation was done to see if the average starting age is at least 19. the ...
March 20, 2012

Physics
A certain p-channel JFET has a VGS(off) = +6V. What is ID when VGS = +8V?
March 9, 2012

question
anyone who knows that the school of journalism in Indiana university is a good one? how about the major public relation in the school?
February 29, 2012

math
35 people indeed>
February 29, 2012

Physics
A 3.50 kg mass, m, on a frictionless table is moving in a circle with radius 0.420 m at a constant speed. m is attached to a 6.40 kg mass, M, by a cord through a hole in the table. Find the speed with which m must move for M to stay at rest.
February 27, 2012

Physics
A 3.50 kg mass, m, on a frictionless table is moving in a circle with radius 0.420 m at a constant speed. m is attached to a 6.40 kg mass, M, by a cord through a hole in the table. Find the speed with which m must move for M to stay at rest.
February 27, 2012

math
2 airplanes start at the same time from airports 500 km apart. Each flies with an airspeed of 200 km/hr toward the other airport. One reaches its airport half an hour before the other plane reaches the other airport. How fast is the wind blowing?
February 16, 2012

Chemistry
I have the same question in my homework. Anybody know how to do this?
February 15, 2012

physics
A football kicker lines up to kick a game winning kick. The goalpost is 30m away and the ball must clear the 3.3m high cross-bar. If the kick leaves his foot at an angle of 35 degrees, how fast must the kick be to clear the bar?
February 13, 2012

physics
At a circus, a human cannonball is shot from a cannon at 15m/s at an angle of 40 degrees from horizontal. She leaves the cannon 1m off the ground and lands on the way down in a net 2m off the ground. Determine her horizontal displacement.
February 13, 2012

Calculus
Two forces of equal magnitude act to 60 degrees. If their resultant has a magnitude of 30N, find the magnitude of the equal forces.
February 11, 2012

Statistics
A box contains four balls labeled 1,2,3,4 respectively. Two balls will be sequentially selected from the box at random without replacement. Let Y1 be the maximum of two outcomes and Y2 be the minimum of two outcomes observed. Find the joint probability function of Y1 and Y2.
February 10, 2012

physical science
A stone is dropped from rest at the top of a tall building. Determine the distance the ball has traveled after ½ second, one second, 3/2 seconds, and 2 seconds. How fast is the ball moving at the end of the 2 seconds?
January 25, 2012

physics
A room has the dimensions 3.0 m by 4.0 m by 4.0 m . The air in the room is 79% N2( MW= 28) and 21% O2 (MW = 32). At a temperature of 20 degrees Celsius and pressure of 115 kPa , what is the mass of the air in the room in kilograms?
November 28, 2011

physics
Starting at rest at the edge of a swimming pool, a 72.0-kg athlete swims along the surface of the water and reaches a speed of 1.15 m/s by doing the work Wnc1 = +170 J. Find the nonconservative work, Wnc2 done by the water on the athlete.
November 16, 2011

Chemistry
Electrons in the outermost principal shell of an atom that are involved in chemical bonding are referred to as:
November 14, 2011

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