Saturday

April 25, 2015

April 25, 2015

Total # Posts: 1,781

**Applied maths**

2. When light passes through a transparent medium, its intensity I at a depth d can be modelled using the equation where I0 is the initial intensity, and k is a constant. If the intensity of sunlight is reduced to 54% of its original value after penetrating through a depth of...
*February 13, 2013*

**Aplied maths**

1. A steel plate initially at 21.2°C is placed in a furnace at 785°C for 58.0 minutes. While in the furnace the temperature of the plate increases at a rate of 4.18% per minute. After 58.0 minutes, the plate is removed from the furnace and placed on a concrete slab to ...
*February 13, 2013*

**Trignometry**

A car is moving at a rate of 55 mph and the diameter of its wheels is 2 feet. A) Find the number of revolutions per minute the wheels are rotating. B) Find the angular speed of the wheels in radians per minutes.
*February 12, 2013*

**Chemistry**

If I titrate a sample containing Ammonium Sulphide with a 0.05m Cadmium chloride until an end point is reached, how do I calculate the % sulphide in the sample
*February 8, 2013*

**Physics**

An ideal refrigerator-freezer operates with a COP = 8.0 in a 28°C room. What is the temperature inside the freezer?
*February 7, 2013*

**Chem ap**

What is the concentration of cations of a 2 molar CoCl3 solution?
*February 7, 2013*

**math**

8 students share 5 yds of ribbon equally, what fraction does each student get?
*February 6, 2013*

**Math**

A box with a height of 2 centimeters has a volume of 24 cubic centimeters. The length is three times longer that its width. What is the length of the box?
*February 4, 2013*

**Math **

Ms. Quon discovered that 40 students liked soccer, 20 liked basketball, 10 liked football, and 5 liked swimming. How many times as many students liked basketball as football? Soccer as football?
*January 30, 2013*

**Chemistry**

yes it isa question
*January 28, 2013*

**Chemistry**

a sample of silver chromate has a mass of 78.6 grams?
*January 28, 2013*

**Physics**

The speed of the head of a redheaded woodpecker reaches 3.4 m/s before impact with the tree. The mass of the head is 0.060 kg and the average force on the head during impact is 5.0 N. a)Find the acceleration of the head (assuming constant acceleration) (b) Find the depth of ...
*January 27, 2013*

**Chemistry**

Calculate the molality of HCl in an aqueous 12M HCl solution that has a density of 1.20g/mL
*January 22, 2013*

**programming logic**

The Banking e-Teller system allows bank customers to perform ATM transactions from their cell or smart phones. BET will allow customers to check balances, make remote photo capture check deposits, and perform balance transfers to their checking or savings account. It is time ...
*January 22, 2013*

**Math**

approximate 1802 ft
*January 20, 2013*

**Math**

A single card is drawn from a deck. Find the probability of selecting a 10 or a diamond.
*January 13, 2013*

**chemistry**

at 20 C the vapor pressure of dry ice is 56.5 atm. if 32 g of dry ice is placed in an evacuated .25 l chamber at a constant temperature of 20 C will all the dry ice sublime
*January 13, 2013*

**chemistry**

at 20 C the vapor pressure of dry ice is 56.5 atm. if 32 g of dry ice is placed in an evacuated .25 l chamber at a constant temperature of 20 C will all the dry ice sublime
*January 13, 2013*

**physics**

an electron with a mass of 9.11 x 10^-31 kg is accelerated from rest across a set of 150 V and are separated by 0.80 cm. a) determine the kinetic energy of the electron after it crosses between the plates.( ans 2.4 * 10^-17 j) b) determine the final speed of the electrons. (...
*January 12, 2013*

**science**

How would you find a mass of a rolling marble?
*January 8, 2013*

**R&slotto pool**

What are the possible numbers to play for todays club master lotto pool
*December 20, 2012*

**principal management**

Discuss how the path-goal theory of leadership and the expectancy theory of motivation are related
*December 19, 2012*

**principal management**

8. (TCO8) Briefly explain what is meant by objective and judgmental performance evaluation. Discuss two methods of judgmental evaluation. (Points : 10)
*December 19, 2012*

**5th grade math**

Ryan worked 1 3/4 hours one day and 2 3/4 hours the next day. Estimate the total number of hours he works on both days combined.
*December 16, 2012*

**MATH HELP Algebra**

An illustration of the associative property of addition provide an example
*December 13, 2012*

**Please HELP with this storie problem**

I need help with some of the problems I have all ready posted please help me
*December 13, 2012*

**Please HELP with this storie problem **

Dave buys 3 green peppers and 2 red peppers for $3.45. Ruth buys 4 green peppers and 3 red peppers for $ 5.00. Find the price of each variety of pepper.
*December 13, 2012*

**MATH help PLZ provide an example**

An illustration of the associative property of addition provide an example
*December 13, 2012*

**MATH help PLZ provide an example**

An illustration of the associative property of addition provide an example
*December 13, 2012*

**Math help give example **

A third degree polynomial of one variable with four terms written in descending order
*December 13, 2012*

**Math help storie problem**

Dave buys 3 green peppers and 2 red peppers for $3.45. Ruth buys 4 green peppers and 3 red peppers for $ 5.00. Find the price of each variety of pepper.
*December 13, 2012*

**Math help give an example **

The equation of a line that is perpendicular to the line y=-7x+4
*December 13, 2012*

**Math help give an example**

The equation of a line that passes through (0,0)
*December 13, 2012*

**Math help plz**

To determine the number of fish in a lake , a conservationist catches 500 fish, tags them, and releases them into the lake. Later, 120 fish are caught and 25 of them are tagged. Estimate the number of fish in the lake.
*December 13, 2012*

**How do I solve for w**

W^2+48^2=50^2
*December 13, 2012*

**Math help **

Find the width of a recctangle that has a length of 48 cm a diagonal of 50 cm.
*December 13, 2012*

**Solve for x math help**

(x-4)^2=12
*December 13, 2012*

**Math solve for x**

X^2-4x-24=0
*December 13, 2012*

**chemistry**

Yes theanwser would be anwser B
*December 13, 2012*

**Math storie problem**

The perimeter of a rectangle is 82 yards. The length is two yards more than the width. Find the dimensions of the rectangle.
*December 13, 2012*

**MATH help PLZ sole for x:**

Solve for x: X-1/x = 3x/x-2
*December 13, 2012*

**Please help me out I can't figure out how to do th**

Graph this equation: x=-3 PLZ show the steps of how you got it.
*December 13, 2012*

**Math story problem**

Melissa and Emily leave by car from the same location traveling in opposite directions. Melissa leaves at 4:00 traveling at 55mph. Emily leaves at 5:00 traveling at 60 mph. At what time will they be at 325 miles apart?
*December 13, 2012*

**I don't know the quadreatic formula for this**

X^2 x+2=82, x^2+2x=82
*December 13, 2012*

**Math HELP**

Write the equation of the line (in slop/intercept form) that has a slop of 7 and goes through the point (6,4).
*December 13, 2012*

**Math **

The perimeter of a rectangle is 82 yards. The length is two yards more than the width. Find the dimensions of the rectangle.
*December 13, 2012*

**NEED Help math **

Graph this equation : X=-3 on a graph PLZ and show how you did it please
*December 13, 2012*

**Algebra help PLZ NOW**

Graph the following equation : 2x-3y=-6
*December 13, 2012*

**Math help algebra HELP plz**

Solve A collection of dimes and quarters is worth $7.65. There are 45 coins in all . How many of each are there?
*December 13, 2012*

**NEED help ON MATH PLZ**

Graph the solution set on a number line : 3x+4>-8
*December 12, 2012*

**Math Help now !!!! Plz**

Solve using the quadratic formula X^2-4x=21
*December 12, 2012*

**MATH Help NOW!!!! Plz**

Solve 3x^2 -49=0
*December 12, 2012*

**algebra 2**

262144
*December 12, 2012*

**Math help plz**

Solve 3x^2-49=0
*December 12, 2012*

**Math help NOW!!!!! Plz**

Solve by completing the square : 2x^2= 9x+5
*December 12, 2012*

**Algebra**

Thanks steve
*December 12, 2012*

**Algebra**

Solve by completing the square: x^2+3x-28=0
*December 12, 2012*

**Chemistry **

If the half-life of uranium-235 is 7.04 (times) 10 (to the eight power) 8 y and 12.5 g of uranium-235 remain after 2.82 (times) 10 (to the ninth power) y, how much of the radioactive isotope was in the original sample?
*December 11, 2012*

**Chemistry **

If the half-life of uranium-235 is 7.04 (times) 10 (to the eight power) 8 y and 12.5 g of uranium-235 remain after 2.82 (times) 10 (to the ninth power) y, how much of the radioactive isotope was in the original sample?
*December 11, 2012*

**Chemistry**

Carbon-14 has a half-life of 5730 y. How much of a 144 g sample of a carbon-14 will remain after 1.719 (times) 10 4y?
*December 11, 2012*

**Chemistry**

Carbon-14 has a half-life of 5730 y. How much of a 144 g sample of a carbon-14 will remain after 1.719 (times) 10 4y?
*December 11, 2012*

**Chemistry**

Dr. Bob, I don't need ur criticism now!! I need your help to resolve these problems
*December 11, 2012*

**Math 10-3**

the work i got from my math teacher says Determine the surface area of each right rectangular prism to the nearest square unit. Any Help with that?....
*December 7, 2012*

**math**

In 2 minutes, a conveyor belt moves 300 pounds of recyclable aluminum from the delivery truck to a storage area. A smaller belt moves the same quantity of cans the same distance in 6 minutes. If both belts are used, find how long it takes to move the cans to the storage area.
*December 4, 2012*

**math**

Three times the reciprocal of a number equals 9 times the reciprocal of 6. Find the number.
*December 4, 2012*

**lenguage arts**

examples of similes
*December 3, 2012*

**lenguage arts**

similes
*December 3, 2012*

**Math**

look in your moms ass
*December 1, 2012*

**ACCOUNTING**

Mills Company uses standard costing for direct materials and direct labor. Management would like to use standard costing for variable and fixed overhead. The following monthly cost functions were developed for manufacturing overhead items: Overhead Item Cost Function Indirect ...
*December 1, 2012*

**math**

Please, help me! 5/(x^2 - 4) + 2/(x^2 - 4x - 3) - 3/(x^2 - x - 6)
*November 29, 2012*

**math**

Please help me solve it
*November 28, 2012*

**math**

denaminator* (LCD)
*November 28, 2012*

**math**

Yes,I need to simplify it and find least common denamotator.
*November 28, 2012*

**math**

5/x^2-4+2/x^2-4x+4-3/x^2-x-6
*November 28, 2012*

**Help ASAP calculus **

Which is the 7th term in the sequence of the squares of all odd numbers starting from 1? 144 169 196 200 225
*November 28, 2012*

**Urgent help calculus**

If the area in square units of the region under the curve of the function f(x)=5, on the interval from x=a to x=8 is 20 square units what is the value of a? 4 5 6 7 8
*November 28, 2012*

**Math**

6y + 5x = -15. Find three solutions of the equation
*November 22, 2012*

**chemistry**

The pressure in car tires is often measured in pounds per square inch (), with the recommended pressure being in the range of 25 to 45 . Suppose a tire has a pressure of 33.5 . Convert 33.5 to its equivalent in atmospheres.
*November 20, 2012*

**chemistry**

The pressure in car tires is often measured in pounds per square inch (), with the recommended pressure being in the range of 25 to 45 . Suppose a tire has a pressure of 37.0 . Convert 37.0 to its equivalent in atmospheres.
*November 20, 2012*

**Maths**

3. Ohm’s law states that the current flowing in a circuit varies directly as the applied voltage and inversely as the resistance. In an experiment, the resistance was increased by triple the percentage by which the voltage was increased. A student calculated the percent ...
*November 17, 2012*

**math**

A chemist has 30%, 40 % and 80 % acid solutions. All three were to be mixed to make 4.00 x 102 L of 38% acid solution but a mistake was made and the amounts of 30% and 80 % were reversed. The result was 4.00 X 102 L of 65 % acid solution. What were the amounts of each solution...
*November 17, 2012*

**Mathematics**

There will be 12 cubes with paint on exactly two faces. There will be 27 smaller cubes in total, 9 on the 'top', 9 in the 'middle' and 9 on the 'bottom. The top and bottom are equivalent. Consider the top 9 cubes. The cube in the center only has one painted...
*November 15, 2012*

**Physics**

A stone is thrown from the ground with initial velocity v0 directed at angle alpha with respect to the horizon. Find equations of its motion both in x and y directions.
*November 10, 2012*

**maths**

3.An 1145 L tank contains 295 L of water and is being filled with brine from a full 1280 L tank at a rate of 1.55 U.S. gallons every 6 seconds. Will the smaller tank ever contain three times the amount of liquid as the larger tank? If so, when? If not, explain why.
*November 4, 2012*

**maths**

2. A bar of uniform section is 81.4cm long and weighs 4.45 kg. A weight of 12.8 kg is suspended from one end. The bar weight combination is to be suspended from a cable attached at the balance point. a)Determine how far from the weight should the cable be attached. b)Calculate...
*November 4, 2012*

**maths**

A large canal will have a cross-section in the shape of an isosceles trapezoid. The top will be twice as wide as the bottom, and the depth will be 8.00 m. Because of the cost of the building materials, the bottom and two slopes sides are to measure 14.0 m altogether. What is ...
*November 4, 2012*

**math**

how many ounces of liquid can be contained in a glass jar that is 5" tall and 3" in diameter (1 gallon =231 cubic inches)
*November 4, 2012*

**CHEM!**

A gas mixture contains 0.60 mol of N2, 0.10 mol of H2, 0.20 mol of CH4. Calculate the pressure of the gas mixture and the partial pressure of each constituent gas if the mixture is in a 6.0 L vessel at 27C. What is the: Total pressure Pressure of H2 Pressure of N2 Pressure of ...
*October 29, 2012*

**Physics**

The particles in the figure below (m1=1.6 kg and m2=3.5 kg) undergo an elastic collision in one dimension. Their velocities before the collision are v1i=12 m/s and v2i=-7.5 m/s. Find the velocities of the two particles after the collision. (Indicate the direction with the sign...
*October 27, 2012*

**Physics**

A railroad car (m=3000 kg) is coasting along a level track with an initial speed of 22 m/s. A load of coal is then dropped into the car as sketched in the figure below. (a) What are the velocities of the car and the coal before the collision along the x direction? Vcar=____m/s...
*October 27, 2012*

**Finance**

x = 33.96
*October 24, 2012*

**MATH - ALGEBRA**

Classify as Monomial, Binomial or Trinomial 8X2-3/5 X+35 Please help.
*October 22, 2012*

**math**

it is not less than 40. it is not greater than 70. it is not an odd number. it does not have an even number in the tens place. it does not have a 4 in the ones place. it does not have a 6 in the ones place. what is the mystery number?
*October 18, 2012*

**math**

i have 8 coins in my piggy bank. I have twice as many dimes as I have quarters. I have twice as many pennies as I have dimes. I have less than 95 cents altogether. How many of each coin do I have?
*October 17, 2012*

**marketing**

explain how the e-business's online service fits within the e-marketing mix
*October 15, 2012*

**math**

This is the Crailsheim water tower in Baden-Württemberg, Germany. Its construction was completed in 1912. The base of the tower is a graduated cylinder about 19.2 m high with a diameter of 11.5 m at the base and 8.1 m at the top. a)The spherical tank holds 4.08 ...
*October 10, 2012*

**math**

A regular triangular pyramid has an altitude of 15.0 m and the base is 8.00 m on a side. Find the area of a section made by a plane parallel to the base and 8.00 m from the vertex.
*October 10, 2012*

**maths**

A chemical engineer designed a 625 ft long tailings channel to have a rhombus cross-section that is 9.5 ft deep, with walls sloping at an acute angle of 44„a. A contractor placed a bid to excavate the canal at $195/cubic yard plus 20% profit. What was the bid?
*October 10, 2012*

**physics**

A pelican ﬂying along a horizontal path drops a ﬁsh from a height of 6.0 m. The ﬁsh travels 7.7 m horizontally before it hits the water below. What was the pelican’s initial speed? The acceleration of gravity is 9.81 m/s 2. If the pelican was ...
*October 9, 2012*

**physics**

Janet jumps oﬀ a high diving platform with a horizontal velocity of 2.25 m/s and lands in the water 1.6 s later. How high is the platform? The acceleration of gravity is 9.8 m/s 2
*October 4, 2012*