Wednesday

May 4, 2016
Total # Posts: 864

**physics**

For the next part, you will need to know that the position d of an object attached to a spring that oscillates with period T=1.0s is a sinusoidal function of time: d=kcos(2πt)d=kcos(2πt) for some constant k. Assume that the initial position of the object is d0=2.0cm...
*March 30, 2016*

**Social Studies CHECK MY ANSWERS**

yes its D
*March 22, 2016*

**Math**

Find the least positive integer that leaves remainders of 1, 2 and 3 when divided by 3, 5 and 7 respectively.
*March 19, 2016*

**Math**

so 55% is the answer @ collins? thanks for the help though
*March 19, 2016*

**Math**

A game consists of drawing a number from 1-20. A player wins if the number drawn is either a prime number or a perfect square. What is the probability of winning the game?
*March 19, 2016*

**math**

A 4cm x 5cm x 7cm rectangular prism is painted on all faces. If the prism is cut into 1cm x 1cm x 1cm cubes, how many cubes do not have paint on any of its sides?
*March 17, 2016*

**science computer**

Write a program to read the names and age of 10 people and print the name of the oldest person.assume that there are no person of the same age.data is supplied in the following form:name,age,name,age
*March 13, 2016*

**esl**

is the statement, 'the blueberries tasted delicious.' a passive statement
*March 8, 2016*

**Math**

James and his friends rolled two fair number cubes 500 times and recorded the sum of the numbers shown on the cubes each time.On 42 of the trials the sum was 10.Which of these is most likely the probability that the sum of the numbers shown on the cubes is 10 when two fair ...
*March 7, 2016*

**Probability**

I meant to just list it as math
*March 6, 2016*

**Probability**

Makoto and his friends rolled two fair number cubes 500 times and recorded the sum of the numbers shown on the cubes each time. On 42 of the trials the sum was 10. What will be the probability that the sum of the numbers shown on the cubes is 10 when two fair number cubes are ...
*March 6, 2016*

**physics**

A long straight horizontal wire carries a current I = 4.80 A to the left. A positive 1.00 C charge moves to the right at a distance 5.00 m above the wire at constant speed v = 4500 m/s . What is the magnitude B of the magnetic field at the location of the charge due to the ...
*March 3, 2016*

**math**

the high temp today was 62 degrees. when nighttime comes, the temp will drop 40 degrees. by 4 am the temp will drop an additional 40 degrees. what is the temp at 4 am?
*February 25, 2016*

**Math**

If m< 1=53 , what is m<4 -53 -43 -37 -27 If m<1=50, what is m<5 -50 -40 -35 -25 If m<4=25, then what is m<8 -105 -75 -175 -25
*February 25, 2016*

**Physics**

Three uniform spheres are located at the corners of an equilateral triangle. Each side of the triangle has a length of 2.50 m. Two of the spheres have a mass of 4.40 kg each. The third sphere (mass unknown) is released from rest. Considering only the gravitational forces that ...
*February 23, 2016*

**bio**

How many grams of MgCl2 do you need to make 2 L of a 0.2 M solution?
*February 8, 2016*

**Spanish**

What's the difference between "mensajero" and "repartidor"?
*January 19, 2016*

**math-linear equations**

x=cows y=horses x+y=340 y=x+52 Plug in x+52 for your y value on the first equation. Solve for x, and then y.
*January 19, 2016*

**math**

During a triathlon, Sharon swims 1/4 of the total route and cycles 3/5 of the remaining route. She runs the rest of the route. If she runs 3,600 meters, find the total distance if the route
*January 14, 2016*

**chemistry **

how many liters (at STP) of chlorine gas are required to produce .050L of hydrogen chloride gas?
*January 12, 2016*

**physics**

A particle of mass m = 0.3 kg is acted upon by a force so that its position vector, r(t)=2.0t^2(i)- 5.0t^2 (j) +t^2 (k) where t is in s. What is the (instantaneous) power delivered by this force to the particle at time t = 2.0s?
*December 10, 2015*

**Geometry**

To repair a roof that is 4 meters high, Mr. Russo leans a 5-meter ladder against the side of the building. To reach the roof, how far away from the building should he place the base of the ladder?
*December 10, 2015*

**math**

A researcher uses analysis of variance to test for mean differences among three treatments with a sample of n = 12 in each treatment. The F-ratio for this analysis would have what df values?
*November 22, 2015*

**Math **

A walks 6 miles in 90 mins, how many miles does A walk in 60 minutes?
*October 29, 2015*

**Social Studies Please Check My Answers**

victora is right thanks!
*October 29, 2015*

**social studies**

what resource first drew european traders to canada? AND I WANT THE RIGHT ANSWER!
*October 12, 2015*

**Physics **

You can shoot an arrow straight up so that it reaches the top of a 25-m-t building. (a) How far will the arrow travel of you shoot it horizontally while pulling the bow in the same way? The arrow starts 1.45 m above the ground.(b) Where do you need to put a target that is 1.45...
*October 10, 2015*

**math**

Tim needs to fill 3 20L barrels with oil. Oil dispenser flows at 100ml/s . How long to fill up 3 barrels. Please help by showing all steps so I can understand how the answer was determined. Thanks!
*October 2, 2015*

**Algebra I**

If a set of ordered pairs is a function, are the ordered pairs also a relation? (Also, please explain why)
*September 29, 2015*

**L.A**

The correct answers are B A B Just got 100% 3/3
*September 22, 2015*

**Calculus**

I know the derivative of x is 1, but I'm having a hard time proving it with the limit definition of the derivative. I have... Lim delta x ->0 (x+ delta x)-(x)/delta x = 0 But I know the answer is 1. I don't understand what I am doing wrong
*September 14, 2015*

**math **

The number of units a factory produces is estimated to increase 15% every year geometrically. The production of first years was 5000 units. Estimate the production of the fifth year.
*September 7, 2015*

**Math Trig**

Length of side answered. Can not find bearing of angle .4
*September 7, 2015*

**Math Trig**

A plane's flight path called for it to fly from J to W. W is 200kms due North and 500kms due west of J. Draw a coordinate picture. What bearing will the pilot fly and what distance will he or she go in air kilometers?
*September 7, 2015*

**math**

A planes flight path called for it to fly from J to W. W is 200km due North and 500km West of J. What bearing will the pilot fly and what distance will be traveled in air kilometers. I know to draw and image but that is it.
*September 4, 2015*

**Math Trig**

A plane's flight path called for it to fly from J to W. W is 200kms due North and 500kms due west of J. Draw a coordinate picture. What bearing will the pilot fly and what distance will he or she go in air kilometers?
*September 3, 2015*

**Math**

Pouring concrete into backyard. The patio slab will be 7m long, 2m wide and 10cm deep. How many cubic meters of concrete will you need to fill the patio?
*September 3, 2015*

**Chemistry**

Thanks!
*July 8, 2015*

**Chemistry**

Is my Henderson equation right? 10.15=9.95+log(x/(.059-x))
*July 8, 2015*

**Chemistry**

What volume, in liters, of 1.04 M KOH solution should be added to a 0.116 L solution containing 10.08 g of glutamic acid hydrochloride (Glu, FW = 183.59 g/mol; pKa1 = 2.23, pKa2 = 4.42, pKa3 = 9.95) to get to pH 10.15?
*July 8, 2015*

**physics**

Explain how it is possible for a motorcycle (mass = 250 kg) to have the same momentum as a locomotive engine (mass = 2,500 kg) i though momentum was directly proportional to mass so the more mass the more the momentum? how is it possible then?
*July 1, 2015*

**physics**

A ball (mass 12 kg) moving at 15 m/s in the +x-direction collides with a ball (mass 36 kg) moving at 5.0 m/s in the +y direction. After colliding, the 12-kg ball moves at 6.0 m/s at an angle of 30°above the +x direction. Afterward, what is the speed and direction of the 36...
*July 1, 2015*

**Language Arts**

all of them are but number 3
*May 20, 2015*

**M**

A woman spend half of her money on book and give 1 rupee to a man,than she sped half of rest money and give 2 rupee to a man,than spend half rest money give3 rupee to a man.at last 1 rupee left.what amound he have at first
*May 11, 2015*

**English 3**

What is the message/theme in "Eulogy" by Brian Turner?
*April 19, 2015*

**College Accounting **

The Thompson Company uses activity-based costing to determine product cost. Three activities and their rates have been calculated as shown below. Setting up equipment = $500 per setup Moving goods = $20 per move Machining = $4 per machine hour Thompson provided the following ...
*April 17, 2015*

**biology**

How does the plant regulate what is able to enter into the stem of the plant? Does it have something to do with the casparian strip?
*April 12, 2015*

**Calculus**

1. integral (x^3 * sqrt(x^2-4)) dx I'm confused on how to start this problem, if I am doing trig substitution.
*April 5, 2015*

**chemistry**

calculate the grams of 1.8% (m/m) NaCl solution that contains 8.00 g of NaCl I tried 1.8 times 8.00g divided by 58.44g times 100 my answer is 24.6g rounded to 2 SF is 25g this truned out to be wrong I'm stumped!
*April 1, 2015*

**English**

Jhon and amy ----- things.(to swap)
*April 1, 2015*

**physics**

1) What average power is required for a runner with a mass of 85 kg to reach a speed of 8 m/s from a stationary start during a time of 2 s? 2) A 1000 kg car travels east at 30 m/s and collides with a 3400 kg truck travelling south at 20 m/s. After the collision the two ...
*March 29, 2015*

**math**

For more than 4000 years the Great Pyramid of Giza stood as the tallest structure in the world. After it was completed, the pyramid stood an amazing 481 feet high. Y 9 th. grade math Semester Project: The Great Pyramid of Giza
*March 19, 2015*

**Chem**

How many moles of NH3 must be added to 1.00 L of solution to dissolve 1.39 g of CuCO3? For CuCO3, Ksp = 2.3 × 10-10. Ignore hydrolysis of CO32-, but consider the formation of the complex ion Cu(NH3)42+.
*March 9, 2015*

**math**

anne spent half of her money on CDs. After se spen half of what was left on stickers
*March 3, 2015*

**College Alegebra**

a 23 foot ladder is placed against a vertical wall of a building with the bottom of the ladder standing on level ground 18 feet from the base. how high up the wall does the ladder reach?
*February 20, 2015*

**math**

After 5 years, marcels account earned $ 600 in interest. If the interest rate is 0.03, how much did marcel initially invest?
*February 19, 2015*

**math**

you must choose the correct answer and then choose the correct solution to get the rigth result never go left you wanna go the rigth way cayse that is the rigth way to go. so always pick the correct solution so the result is positive. Hope this helped if you need more help ...
*January 23, 2015*

**chemistry**

Solid lead(II) iodide was prepared by reacting 65.0 mL of a solution containing 0.218 M lead(II) ions with 80.0 mL of a solution containing 0.265 M iodide ions. If the actual yield of the reaction was 3.26 g, which choice is closest to the %yield of the reaction?
*January 22, 2015*

**chemistry**

In the determination of the molar mass of a volatile liguid a 250ml flask was found to contain 0.250g of the vapor measured at 273c and 760 mmhg pressure. The molar mass is nearest the value
*December 21, 2014*

**chemistry**

A sample of co2 occupies 6.00l at 25c and 700. MmHg. What is the volume of the gas at stp
*December 21, 2014*

**chemistry**

When 40.2g of kc103 is heated what quantity of kc1 is produced
*December 21, 2014*

**math**

I though you Will give me the answer.
*December 2, 2014*

**chem 200**

669 cal of heat is added to 5.00 g ice at –20.0 °C. What is the final temperature of the water?
*November 30, 2014*

**Chemistry**

If 9560 J of energy were absorbed by 500. g of ice at 0.0 °C, what would be the final temperature? Can someone walk me through setting this up?
*November 15, 2014*

**chemistry**

Draw one of the Lewis structure of the N2O5. In each case one oxygen bridges the nitrogens (N-O-N single bond) and 2 other oxygens are bonded to each N. How many equivalent resonance structures are there that satisfy the octet rule and where O makes at most 2 bonds?
*November 6, 2014*

**Physics**

You are driving down a highway at a speed of 20.0m/s when you spot a deer. You quickly slam on your brakes, trying to stop your car in front of the deer. Assume the braking force can be modeled as kinetic friction with a friction coefficient of 0.80. If the deer was 75.0m away...
*October 28, 2014*

**math please help**

3370.56?
*October 27, 2014*

**math**

David has a hose that is 27 ft long. He wants to cut it into two pieces so that the longer piece is 3 ft more than 2 times the length of the shorter piece.
*October 27, 2014*

**science**

EVERYONE! -A is a correct! 5/5 THANK YOU
*October 21, 2014*

**Math**

Which algebretic equation correct represents this sentence? 25 is three times a number decreased by 8. A. 25 = 3w - 8 ? B. 3 = 25w - 8 ? C. 3 = 25w + 8 ? D. 25 =3(w + 8) ? a little confused lol.. help? Thanks Everyone So Much
*October 20, 2014*

**Language Arts**

Thanks again to everyone who helped me :)
*October 20, 2014*

**Language Arts**

Okay thank you. So... For "I love to visit Pine Acers, our cabin in the mountains" Circled "cabin" Underlined "Pine Acres" ????
*October 20, 2014*

**Language Arts**

Okay so in English I'm doing "Appositives" I understand the question and I'm just confused a little. Circle the appositives. Then, underline the noun each appositive explains. 1. Sheila, my cousin works in that department store. I circled "Sheila" I...
*October 20, 2014*

**Science! Help**

LISTEN TO IHateSchoolButGetStrightAs HES RIGHT THANK YOU!
*September 23, 2014*

**U.S History Honors **

Identify the causes of Progressivism and compare it to Populism
*September 14, 2014*

**4th grade math**

128,955 . Round each number to the place of the underllined digit. 8 is the underlined digit
*September 8, 2014*

**chemistry 101**

A patient receives 2700mL of an IV solution containing 4g g of glucose per 100 mL .How much energy, in kilojoules, does the patient obtain from glucose, a carbohydrate? please help I keep getting the wrong answer
*September 4, 2014*

**chem**

A patient receives 2700mL of an IV solution containing 4g g of glucose per 100 mL .How much energy, in kilojoules, does the patient obtain from glucose, a carbohydrate?How much energy, in kilocalories, does the patient obtain from glucose?
*September 3, 2014*

**Chemistry**

Just to clarify- if I would have to mix 100 mL of 36 M solution with 600 mL of distilled water to make a 6 M solution (700 total mL) is that correct, or do I have that mixed up? Sorry for the trouble :(
*September 2, 2014*

**Chemistry**

Question: how do you dilute something with a huge concentration to the same thing with a smaller concentration? For example: How do you dilute a 36 M solution of NaOH to a 6 M solution of NaOH?
*September 2, 2014*

**chemistry**

Suppose you have two 100-mL graduated cylinders. In each cylinder there is 40.0mL of water. You also have two cubes: one is lead(11.3g/ml), and the other is aluminum(2.70g/ml) Each cube measures 2.0cm on each side. After you carefully lower each cube into the water of the ...
*September 2, 2014*

**chem**

but doesn't the lead and aluminum have anything to do with the calculation
*September 1, 2014*

**chem**

Suppose you have two 100-mL graduated cylinders. In each cylinder there is 40.0mL of water. You also have two cubes: one is lead, and the other is aluminum. Each cube measures 2.0cm on each side. After you carefully lower each cube into the water of its own cylinder, what will...
*September 1, 2014*

**engineering maths**

Show that the following curves are intersect eachother orthoganally.r-(1+coso) r-(1-coso)
*August 31, 2014*

**World Geography**

A. was the correct answer.
*August 1, 2014*

**World Geography**

19.With respect to human rights issues in Southeast Asia, which statement is most accurate? A.Both Cambodia and Vietnam carried out ethnic eradication programs against hill people. B.Chinese merchants living in Cambodia and elsewhere have carried out vendettas against hill ...
*August 1, 2014*

**chemistry**

A block of copper of unknown mass has an initial temperature of 66.7 ∘ C . The copper is immersed in a beaker containing 95.5g of water at 20.6 ∘ C . When the two substances reach thermal equilibrium, the final temperature is 26.0 ∘ C .What is the mass of the...
*July 2, 2014*

**math**

At Dora's donut shop, dora makes 15 different varieties of donuts. Seven of these varieties are filled with jelly or cream. Officer sweetooth was sent to dora's shop to choose a dozen donuts, all different, with six filled and six unfilled. How many different ...
*June 8, 2014*

**Math Personal Finance**

65
*June 8, 2014*

**Language Arts /The Giver**

I just took the quiz I got a 100
*May 21, 2014*

**Language Arts /The Giver**

your answers are correct
*May 21, 2014*

**math **

Indicate whether the following statement is true or false. If a figure can be translated, then it will tessellate. I say false am I right?
*May 19, 2014*

**physics**

an electron in the second energy level absorbs a photon of energy 6 ev what's the speed of the ejected electron? I have tried to manipulate and use the kinetic energy equation, c= lamba x f, and many other ways, but I don't know why can't get the answer, which is v...
*May 18, 2014*

**math**

Use integers from-3 to 3 to graph the equation. y=1/3|x|-2. Please help me how it would be on a graph
*May 18, 2014*

**math**

I forgot to put use the integers -3 to 3 to graph the equation.
*May 18, 2014*

**math**

What would a graph look like with the equation y=-2(x)2+3.the two next to the x means to the second power. Please help me
*May 18, 2014*

**math**

Your description helped me understand thank you. It is D
*May 17, 2014*