Thursday

March 5, 2015

March 5, 2015

Total # Posts: 433

**physics**

A 100kg shot putter is putting a shot 4kg. Just before he releases the shot, he is in the air (feet are off the ground). At this instant, the only force he exerts against the shot is an 800N horizontal force directed forward. a-what is his horizontal acceleration at this ...
*March 1, 2015*

**physics**

Grant accelerates a 1kg ball 5.0m/s2 horizontally. The vertical acceleration of the ball is zero. The force of gravity is the only external force acting on the ball other than the forces Grant exerts on it. a-How large is the horizontal force grant exerts on the ball at this ...
*March 1, 2015*

**Physics**

I don't understand how you got that solution. Could someone please elaborate? PLEASE
*February 21, 2015*

**physics**

A block of wood with a mass of 1300g is sitting on a horizontal tabletop. The coefficient of kinetic friction between the block and table is µk=0.74.A rifle bullet with a mass of 39g is fired horizontally into the block at a sped of 290m/s and stops inside the block. a-...
*February 19, 2015*

**PHYSICS**

A variable length air column (closed on one end) is placed just below a vibrating wire of mass 5.00g, which is fixed at both ends. The length of the air column is gradually increased from zero until the first position of resonance (first harmonic) is observed at 34 cm. The ...
*February 11, 2015*

**Chemistry**

A 76.00-pound flask of mercury costs $132.00. The density of mercury is 13.534 g/cm3. a) Find the price of one cubic inch of mercury by calculating the following intermediate values.
*January 28, 2015*

**Algebra 2**

Let f(x)-5x+3 and g(x)=6x-2 find the f x g and it's domain
*January 14, 2015*

**chemistry **

what quantity of ice would be melted by 2.80 x 10^3 calorie of heat.
*January 11, 2015*

**College Algebra**

Tiffany purchased a $10,000, 13-week Treasury bill that's paying 2.25%. What is the effective rate on this T-bill?
*January 8, 2015*

**Math**

Tiffany purchased a $10,000, 13-week Treasury bill that's paying 2.25%. What is the effective rate on this T-bill? A. 2.26% B. 2.2% C. 2.0% D. 2.7%
*January 5, 2015*

**Math**

Jill traveled to Canada and bought a new lamp for $460 Canadian dollars. In U.S. dollars (to the nearest cent) this is equivalent to
*December 28, 2014*

**music**

A. First
*November 18, 2014*

**Chemistry **

The question has been answered years ago but not how it is solved. I tried the combined gas law. Here is the question: A balloon originally had a volume of 4.39 L at 44 degrees celsius and a pressure of 729 torr. The balloon must be cooled ??? to reduce its volume to 3.78 L at...
*October 30, 2014*

**algebra**

Ms. Baldwin likes to eat cookies. She eats 3 cookies per day. After 5 days, there are 24 cookies left in the box. Write an equation represents the story in y=mx+b form
*October 28, 2014*

**algebra**

x-(15)=24 add 15 both side x=39
*October 28, 2014*

**algebra**

Ms. Baldwin likes to eat cookies. She eats 3 cookies per day. After 5 days, there are 24 cookies left in the box. Write an equation represents the story.
*October 28, 2014*

**math**

what is the expanded form for 408,032,009
*October 20, 2014*

**English**

So subject, verb direct object, and indirect object
*October 8, 2014*

**English**

Identify the sentence pattern used below. I e-mailed my English Teacher my essay. My answer is subject verb
*October 8, 2014*

**Algebra**

-z/3<= 6 My answer is z>= -18
*October 4, 2014*

**Algebra**

Thank you very much. We have been working with these and we learned that addition and subtraction the signs stay the same and change on multiplication and division
*October 4, 2014*

**Algebra**

-5y <= -15 My answer is y>=3
*October 4, 2014*

**Algebra**

thank you
*October 4, 2014*

**Algebra**

Everyone in my family uses this internet address so it's possible some else in the family used it. Thank you for your help.
*October 4, 2014*

**Algebra**

Ms. Sue, who is Sandy?
*October 4, 2014*

**Algebra**

How did that name get on my post? It is traveling at 30 ft per second and I used d=(110-30 ft) I formulated the start point at 2.3 seconds I'm just not sure of the duration or ending time.
*October 4, 2014*

**Algebra**

Start from 110 feet away, a person on a scooter rides towards a checkpoint and then passes it. At what times is the scooter 40 feet away from the checkpoint? My answer is 2.3 to 4.6 seconds
*October 4, 2014*

**Algebra**

Suppose U = 1,2,3,4,5,6,7,8 is the universal set and P = 1,3,5,7, What is P? My answer is 1,3,5,7
*October 4, 2014*

**Algebra**

If n is the set of natural numbers that are factors of 16, what is the set in roster form? My answer is 1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16
*October 4, 2014*

**health**

Veins carry blood ________ the heart A. Away from B. Towards C. Neither A or B D. Both A and B c
*September 23, 2014*

**Chemistry**

The formate ion, (CHO2-), is related to the acetate ion and forms ionic salts with many metal ions. Assume that 9.7416 g of M(CHO2)2 (where M represents the atomic symbol for a particular metal) are dissolved in water. When a solution of 0.200 M sodium sulfate is added, a ...
*September 19, 2014*

**Chemistry**

CHO2^- + KMnO4 > CO3^2- + MnO2 How are you supposed to balance the equations since there is no K in the products?
*September 19, 2014*

**Chemistry**

The formate ion, (CHO2-), is related to the acetate ion and forms ionic salts with many metal ions. Assume that 9.7416 g of M(CHO2)2 (where M represents the atomic symbol for a particular metal) are dissolved in water. When a solution of 0.200 M sodium sulfate is added, a ...
*September 19, 2014*

**Geometry**

is 2 correct for X?
*September 1, 2014*

**Geometry**

ok, I got X = 2
*September 1, 2014*

**Geometry**

Point J is between H and K on line segment HK. use th given information to write an equation in terms of x. Solve the equation. Then find HJ and JK. HJ=(x/4) JK= 3x - 4 KH = 22
*September 1, 2014*

**Programming concepts**

Develop a menu-driven program that inputs two numbers and, at the user’s option, finds their sum, difference, product, or quotient. top-down modular approach and pseudocode to design a suitable program to solve it. I am having so much trouble with this I got two zeros ...
*August 1, 2014*

**math**

selling price of computer is $75 less than 2 times wholesale price. selling price of a tv is $550, what equation is used to find wholesale price of tv
*May 19, 2014*

**Chemistry**

calculate the pH of a solution after .054 moles of KOH is added to a 1.0L buffer solution of .25M HF (Ka=7.1 x 10^-4) and .10M KF
*April 24, 2014*

**math**

Benjamin is a professor at a college and wants to know how big classes at his school. To do this, he takes a random sample of 20 classes and counts how many students are in each one: 30, 45, 12, 15, 18, 35, 40, 100, 45, 54, 85, 90, 34, 54, 21, 22, 42, 13, 15, 19. What percent ...
*April 8, 2014*

**Chemistry**

I don't really understand how to do this problem, or where to start exactly. Can someone explain to me where to start and how I can solve the problem in a step by step process? Thank you in advance! 1. An acetic acid / sodium acetate buffer solution is also 0.020 M AlCl3. ...
*March 25, 2014*

**Math-Algebra 1**

I have 2 questions. one is a rectangle that has an area of 34 square meters, the width is (x+4)m and the length is (x+11)m. The other problem is a triangle that has an area of 119 square ft. The legs are (x+3) ft and (x+6) ft. It has a right angle opposite the hippotenuse. ...
*February 24, 2014*

**Algebra I**

volume of a basketball is 448.9 cubic inches. with the formula V=4/3(pie)radius(cubed) for the volume of the ball, find the radius of the basketball
*January 20, 2014*

**math**

in some cars the rear seat folds down to add more space. Often this split is a 60:40 split. If the rear seat is 60 inches wide, how wide are the two parts?
*January 1, 2014*

**science**

A biologist studying a desert ecosystem observes that the population of a lizard species increases following a particularly hot, dry period that causes a snake population to decline. What could the biologist hypothesize about the roles of these two species? A.The lizard preys ...
*December 13, 2013*

**science**

I think the answer is D.
*December 13, 2013*

**science**

which of the following could be true of two different species that have a competitive relationship in the same ecosystem? A.one species preys on the other B.they relationship is mutually beneficial C.they share the same niche D.one species benefits, while the other is neither ...
*December 13, 2013*

**science**

A salamander is a keystone species in a forest ecosystem with high biodiversity. This species migrates from woodland areas to a local stream to reproduce. If a road is built that cuts off the woodland areas from the stream, what effect will this have on the forest ecosystem? A...
*December 13, 2013*

**science**

About keystone species and renewable resource
*December 13, 2013*

**science**

What determines the carrying capacity of a particular population by an ecosystem? A.keystone species B.pioneer species C.limiting factors D.renewable resource
*December 13, 2013*

**science**

It has to be B then.
*December 13, 2013*

**science**

Is it D?
*December 13, 2013*

**science**

Is it a?
*December 13, 2013*

**science**

What is true? A.biodiversity provides additional that raise the carrying capacity of an ecosystem B.biodiversity increases an ecosystem's ability ti withstand changes C.biodiversity makes an ecosystem more difficult to destroy D.biodiversity provides additional sources of ...
*December 13, 2013*

**science**

What determines the carrying capacity of a particular population by an ecosystem? A.keystone species B.pioneer species C.limiting factors D.renewable resources
*December 12, 2013*

**science**

Is Damon right?
*December 12, 2013*

**science**

Which one? Help! local plants and animals are less apt to be endangered local species require less energy to grow reducing the purchase of distant species means they are saved from being used for food reducing drilling for oil to supply transport fuel reduces the impact on ...
*December 12, 2013*

**science**

why does buying food that is grown in your local area help prevent loss of biodiversity?
*December 12, 2013*

**science**

What is a form of pollution triggered by a formation of a gas and can have dramatic effects? fog pesticides acid rain oil spill
*December 12, 2013*

**science**

bicycle
*December 12, 2013*

**science**

Use of which of the following does not contribute carbon dioxide to the environment? refrigerator charcoal grill computer bicycle
*December 12, 2013*

**science**

The third one?
*December 12, 2013*

**science**

which one out of these: driving a solar powered car snowmobiling around national park launching an engine less glider trekking by horseback
*December 12, 2013*

**science**

What activities would contribute the most global warming?
*December 12, 2013*

**Algebra 1**

The minimum recommended width of the space between 6-inch by 6-inch tiles is 2^-2 inch and the maximum recommended width is 2^-1 inch. Simplify the expressions for the minimum and maximum widths of the space between the 6-inch by 6-inch ﬂoor tiles. I got 1/3 inch is is ...
*December 9, 2013*

**Algebra 1**

I not sure how to do these problems can someone help. a^-1b-2 2x^-3y^1
*December 6, 2013*

**Math**

1) The hypotenuse of an isosceles right triangle is 8 cm longer than either of its legs. Note that an isosceles right triangle is a right triangle whose legs are the same length. Find the exact length of its legs and its hypotenuse. 2) The length of a rectangle is 9 m longer ...
*November 18, 2013*

**school**

Two disks are spinning freely about axes that run through their respective centres (see figure below). The larger disk (R1 = 1.42 m) has a moment of inertia of 1180 kg · m2 and an angular speed of 4.0 rad/s. The smaller disk (R2 = 0.60 m) has a moment of inertia of 906 ...
*October 30, 2013*

**physics**

The propeller blades of an airplane are 2.7 m long. The plane is getting ready for takeoff, and the propeller starts turning from rest at a constant angular acceleration. The propeller blades go through two revolutions between the fifth and the ninth second of the rotation. ...
*October 30, 2013*

**algegra**

an editor gets a 2110 raise each year. after 8 years she makes 51,700 per year. write an equation that gives her income as a function of how many years she has worked
*October 20, 2013*

**Science**

Is a cell wall on a plant or animal cell or on both?
*October 17, 2013*

**statistics**

Assume that a population is normally distributed with a mean of 100 and a standard deviation of 15. Would it be unusual for the mean of a sample of 3 to be 115 or more? Why or why not? how can i write this in a mathematical expression?
*October 9, 2013*

**algebra**

trying to solve a point a slope word problem. you are scheduled to start your job at an oil change shop 2 hours after shop opens. two hours after you start, a total of 11 cars have had their oil changed. three hours later, a total of 14 cars have had their oil changed. At what...
*September 29, 2013*

**math**

suppose 1 milliliter of ink can print 30 pages of text how many pages of text with 2 quarts of ink
*September 24, 2013*

**math**

suppose 1 milliliter of ink can print 30 pages of text how many pages of text with 2 quarts of ink
*September 24, 2013*

**math**

suppose 1 milliliter of ink can print 30 pages of text how many pages of text with 2 quarts of ink
*September 24, 2013*

**Alebra**

here is the 2nd part of the question B. Ben runs for 25 hours. For how many hours does he walk?
*September 7, 2013*

**Alebra**

I meant 25 minutes
*September 7, 2013*

**Alebra**

need to solve a word problem using linear equation in slope form. Ben walks 3 miles per hour, and runs at 6 miles per hour. Runs and walks a total of distance of 210 miles per week. Is this correct 210 = 3/6m +b - equation to show relation of hours run to walk B. is Ben runs ...
*September 7, 2013*

**physics**

A helicopter is ascending vertically with a speed of 5.03m/s . At a height of 132m above the Earth, a package is dropped from the helicopter. How much time does it take for the package to reach the ground?
*September 4, 2013*

**Algebra**

ok I was getting confused on pulling the x to one side, thank you for explaining out. now if I had to put in specific question 8x=3x-10, would I -3x on both sides 8x-3x=-10 5x=-10 x=-2??
*September 3, 2013*

**Algebra**

literal equation: solve for x ax=bx-c
*September 3, 2013*

**algebra**

im trying to solve a literal equation, then solve the specific question first part is stumping me, im to solve for X ax=bx-c this is what I got ax-bx=c, but don't know how to get x by itself
*September 3, 2013*

**Math**

If m <DCE=4x+15 and m<ECF=6X-5 ,find m<DCE
*August 8, 2013*

**keith**

drop a ball from a height of 1.5 meters. Calculate its seed when it hits the floor
*June 27, 2013*

**physics**

You need to fill a football with air to play with it. You know that your pump expels air at 10 ft/s. The needle of your pump has a radius of 5 micrometers. What is the volume flow rate of the air being pumped into the football?
*June 16, 2013*

**physics**

1/6.4106
*June 16, 2013*

**math**

Chad buys peanuts in 2 pound bags. He repackages them into bags that hold 5/6 pound of peanuts. How many 2 pound bags of peanuts should Chad buy so that he can fill the 5/6 pound bags without having any peanuts left over? What are the steps to find the answer.
*May 21, 2013*

**math**

136
*May 16, 2013*

**Chemistry**

What is the pH of a buffer system that contains 0.18M NH4+ and 0.14M NH3? The pKa of NH4+ is 9.25.
*April 18, 2013*

**algebra 2**

Find two negative numbers such that the sum of their squares is 170 and twice the square of the first minus 3 times the square of the second is 95
*April 15, 2013*

**Chemistry **

A 0.750 g sample of an unknown solid is dissolved in 100 mL of water and acidfied with 25 mL of 3 M H2SO4 then titrated with a 0.0200 M KMnO4 solution. If the unknown solid requires 12.5 mL of the KMnO4 solution to reach the endpoint, what is the % sodium oxalate in the ...
*April 9, 2013*

**Chemistry **

calculate the ph of titration of 50.0 ml of 0.140 m hclo (aq)
*April 7, 2013*

**Physics**

Answering my own question here, but... µs (static friction) Ffs (peak frictional force) Fn (Normal force -needs to be in Newtons-) Ffs = µs * Fn 71 = µs * (18 * 9.8) 71 = µs * 176.4 71 / 176.4 = µs * 176.4 / 176.4 (isolates the variable µs...
*March 21, 2013*

**Physics**

Answering my own question here, but... µs (static friction) Ffs (peak frictional force) Fn (Normal force -needs to be in Newtons-) Ffs = µs * Fn 71 = µs * (18 * 9.8) 71 = µs * 176.4 71 / 176.4 = µs * 176.4 / 176.4 (isolates the variable µs...
*March 21, 2013*

**Physics**

A dock worker loading crates on a ship ﬁnds that a 18 kg crate, initially at rest on a horizontal surface, requires a 71 N horizontal force to set it in motion. However, after the crate is in motion, a horizontal force of 46 N is required to keep it moving with a ...
*March 21, 2013*

**Math**

Ginny Katz has decided to invest $700 quarterly for 10 years in an ordinary annuity at 8 percent. The total cash value of the annuity at end of year 10 is?
*March 19, 2013*

**math**

which of the numbers below is the sum of four consecutive whole numbers
*March 18, 2013*

**physics**

A student is attempting to haul a 500 kg log down a 24 degree hill. The log has a coefficient of friction of .5. The student is pulling with about 1700 N of force. Is the student pulling too hard or too lightly? Calculate exactly how much harder or less hard the student should...
*February 19, 2013*

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