Wednesday

April 1, 2015

April 1, 2015

Total # Posts: 181

**Physics**

In the drawing, the weight of the block on th e table is 380 N and that of the hanging block is 175 N. Ignore all frictional effects, and assuming the pulley to be massless. What is the acceleration of the two block?
*March 13, 2015*

**Physics**

A 10.0-kg block is released from point A in Figure P8.57. The track is frictionless except for the portion between points B and C , which has a length of 6.00 m. The block travels down the track, hits a spring of force constant 2 250 N/m, and compresses the spring 0.300 m from...
*January 27, 2015*

**Science**

If I push a book 1.5 m across the table using a constant for of 10 N, how much work do I do on the book?
*January 13, 2015*

**civics**

we actually need current event kind of articles, thankyou though.
*January 8, 2015*

**civics**

are there any articles with examples of checks and balances, we need at least three.
*January 8, 2015*

**Math**

A rectangular tabletop has a length of 4 3/4 feet and an area of 11 7/8 square feet. What is the width of the tabletop❓❔❓❔❓❔
*October 27, 2014*

**Physics**

Question Part Points Submissions Used A hockey puck is hit on a frozen lake and starts moving with a speed of 12.90 m/s. Exactly 6.7 s later, its speed is 6.70 m/s. (a) What is the puck's average acceleration? Incorrect: Your answer is incorrect. m/s2 (b) What is the ...
*October 6, 2014*

**Social Studies**

What role did the ice age play in the migration of people and animals to North America?
*September 9, 2014*

**English 12**

Which pair of readings presents male and female perspectives on the same situation? A. "The Wanderer" and "The Wife's Lament" B. "The Death of Beowulf" and "The Seafarer" C. "The Seafarer" and "The Wanderer" D. &...
*September 5, 2014*

**math **

If x and y are positive, when is x-y negative?
*August 26, 2014*

** College Algebra**

Find an exponential growth model n(t) = Cat for the population t years since the bullfrogs were put into the pond with coordinates (0,148) (2,333)
*April 21, 2014*

**physics**

A 4.0-uF capacitor is charged to 600 volts. how much energy is stored in the electric field of the capacitor?
*March 9, 2014*

**Social Studies**

Hello, I need help I have to do a venn diagram and do similarities and locations of Ganda, Swahili and kwama. Thank you
*February 24, 2014*

**Math**

Eli can’t see why a size transformation preserves orientation, but a similitude does not. How could you help him understand this concept?
*December 8, 2013*

**science**

How do food, oxygen and water enter a cell?
*August 21, 2013*

**statistics**

An employer polled its employers to see if they agree with the proposed new store hours and whether or not their present shift made a difference in their answers. The customers answered 1 for agree, 2 for don't know, and 3 for disagree. Nine first shift employees answered...
*June 12, 2013*

**statistics**

A specific study found that the average number of doctor visits per year for people over 55 is 8 with a standard deviation of 2. Assume that the variable is normally distributed. 1. Identify the population mean. The population mean is 8. 2. Identify the population standard ...
*June 3, 2013*

**Physics**

An X-ray tube used for cancer therapy operates at 33 MV with a beam current of 79 mA striking a metal target. Calculate the power of this beam. Answer in units of W
*May 5, 2013*

**American History**

After 1815 travel was greatly improved by all of the following Except: a.) Construction of canals that made shipping of goods faster and less expensive b.)by 1820 a national railroad network that encompassed over 150,000 miles of railroad had developed c.)government financial ...
*April 28, 2013*

**Algebra**

Who Discovered the First Singind and Dancing Hawk?
*February 19, 2013*

** social studies**

In the election of 1860, the _______ won the electoral votes of all the free states, except a fraction of the New Jersey votes. A. Constitutional Union Party B. Whigs C. Republicans D. Democrats
*February 4, 2013*

**Math help please?**

You have 2 2/3 cups of dried fruit to divide evenly among 3 children. How many cups of fruit will each child receive? what do I do??
*January 27, 2013*

**science**

1.2X 10log6 by 1/16=
*January 13, 2013*

**algebra**

1.2X 10log6 by 1/16=
*January 13, 2013*

**spanish**

which is the correct answer??? "Sarits y yo (preparan/preparamos) la leccion." Is is preparan or preparamos and why?
*January 4, 2013*

**Chemistry**

A sample of iron(II) sulfate was heated in an evacuated container to 920 K, where the following reactions occurred. Reaction (a): 2 FeSO4(s)--> Fe2O3(s) + SO3(g) + SO2(g) Reaction (b): SO3(g)--> SO2(g) + 1/2 O2(g) After equilibrium was reached, the total pressure was 0....
*January 3, 2013*

**chemistry *Dr.Bob222**

Why do firefighters recommend the use of a deluging volume of water when extinguishing an oxidizer-supported fire?
*December 22, 2012*

**chemistry *Poorly defined commonly used question**

"Why are active on-duty firefighters likely to experience the adverse health effects from inhaling 300 ppm of carbon monoxide faster than nonactive off-duty firefighters who inhale the same concentration of the same substance? Explain your answer using the chemicals/...
*December 16, 2012*

**math**

The lethal inhalation dose of Sarin for a 200lb person has been determined to be 0.0015 mg. Determine the LD50 of Sarin that researchers used to calculate this lethal inhalation dose. 1.4 x 10-4 mg/kg 0.16 x 10-4 mg/kg 1.8 x 10-5 mg/kg
*December 16, 2012*

**chemistry "Dr. Bob222" Guidance Request**

The lethal inhalation dose of Sarin for a 200lb person has been determined to be 0.0015 mg. Determine the LD50 of Sarin that researchers used to calculate this lethal inhalation dose. 1.4 x 10-4 mg/kg 0.16 x 10-4 mg/kg 1.8 x 10-5 mg/kg 0.00023 mg/kg
*December 15, 2012*

**chemistry**

SOCl2 + C4H6CaO4 ¨
*December 11, 2012*

**chemistry**

Acetyl chloride is a colorless, fuming liquid used primarily in the chemical industry. a)How is acetyl chloride produced? If 915 gallons is produced and shipped, will DOT require the carrier to display the FLAMMABLE placard? Explain your answer. b)When there is a bulk spill of...
*December 10, 2012*

**chemistry**

When relatively small amounts of magnesium burn, the fires are extinguished using commercially available dry powder. a)Why might this fire rekindle days later as someone tries to remove the residue with water? b)What chemical process is involved here?
*December 4, 2012*

**maths**

I am equivalent to 1/2 the sum of my numerator and denominator is 15. What fraction am I?
*December 2, 2012*

**Physics**

We have not learned this. I dont know where to start.
*November 19, 2012*

**Physics**

When a gun (3 kg) shoots a bullet (.025 kg), the bullet goes forward and the gun recoils backward. Which of the following statements is true? Select one: a. The force pushing the gun backwards is smaller than the force pushing the bullet forward. b. Both objects accelerate at ...
*November 19, 2012*

**Physics**

I am really stuck. I drew a picture and everything.
*November 19, 2012*

**Physics**

A 10 kg block is placed on a ramp. The ramp has a 20 degree angle above the horizontal. What force of friction is needed to keep the block at rest?
*November 19, 2012*

**english**

Identify the italicized word according to its class in structural linguistics. There are no easy answers.
*November 7, 2012*

**College Algebra**

The campus of a college has plans to construct a rectangular parking lot on land bordered on one side by a highway. There are 720 feet of fencing available to fence the other three sides. Let x represent the length of each of the two parallel sides of fencing. a) Express the ...
*October 15, 2012*

**8TH GRADE MATH EXPRESSIONS**

A catering business charges $50 for setting p a meal and $150 for enough food for 12 people. You will be using the caterer for an upcoming celebration. There will be 32 people at the party. Find the total cost to use the caterer for the party.
*August 23, 2012*

**8TH GRADE MATH EXPRESSIONS**

I think i should divide 4-hour rental into $21o and divide 6-hour rental into $228. then compare, which would make shop B more expensive... right?
*August 23, 2012*

**8TH GRADE MATH EXPRESSIONS**

At a lake, there are 2 boat rental shops. Shop A charges $210 for a 4-hour rental, shop B charges $238 for a 6-hour rental. Which shop charges more per hour? Also, how much more expensive is this shop?
*August 23, 2012*

**8TH GRADE MATH EXPRESSIONS**

You are setting up a children;s painting class. Poster board paints cost $3.80 for each child, and a package of 100 sheets of poster board costs $66.50. Assuming that you only need one package of poster board, write an algebraic exprssion for the total cost of supplies. Find ...
*August 23, 2012*

**8TH GRADE MATH EXPRESSIONS**

CAMERON IS IN 8TH ASUNTE IS IN 5TH THIS PROBLEM IS 8TH GRADE MATH.YES I NEED TO EXPRESS IT INTO MATH TERMS. TY
*August 23, 2012*

**8TH GRADE MATH EXPRESSIONS**

THE TOTAL COST FOR 4 PEOPLE TO RIDE THE BUS IF THE FARE OF .75 IS INCREASED BY D DOLLARS.
*August 23, 2012*

**english**

Which of the following sentences is correctly punctuated? A. The local police asked the F.B.I. to assist with the case. B. Mr. Jones visited the YMCA before becoming a member. C. Mary remembered to buy milk didn't she? D. The company held it's annual party at the ...
*June 4, 2012*

**Vectors**

WAT DO U MEAN BY DOT?
*April 26, 2012*

**Vectors**

Vectors "v" and "w" are given by v = 5i - 2j and w = i + 3j. Find scalars r and s such that r ( v - w) = ( r + s )i - 20j.
*April 26, 2012*

**Math**

In a bag of marbles, 3/5 of them are blue and the rest are red. If the number of red marbles is doubled and the number of blue marbles stays the same, what fraction of the marbles will be red?
*February 15, 2012*

**Spanish**

It means what are you buying for your mother?
*February 15, 2012*

**Spanish**

You quiero un gato para Navidad
*February 15, 2012*

**algebra**

250 is the y-intercept and 40 is the slope of the line.
*February 15, 2012*

**math**

A home improvement store sells 2355 feet of wire per day. How many yards of wire does the store sell per day?
*February 2, 2012*

**social studies**

what made constantine suppurt christianity?
*January 26, 2012*

**geometry**

Two forces are pushing on an object, one at 12 lbs of Force and one at 5.66 lbs of Force. The angle between them is 35° (each is 72.5 from horizontal, such that the forces make a v with the object in the center). 17. What is the total Force on the object? 18. What is the ...
*December 16, 2011*

**geometry**

54 cm
*December 8, 2011*

**english**

how to rewrite this sentence Hibertnation helps an animal with an animal's survival
*October 31, 2011*

**calculus**

172.8******
*October 27, 2011*

**calculus**

5.76
*October 27, 2011*

**Physics**

Sorry, it was an accident. Geesh. It didn't copy and paste correctly.
*October 23, 2011*

**Physics**

Need help on part B! A 2.50 mass is pushed against a horizontal spring of force constant 26.0 on a frictionless air table. The spring is attached to the tabletop, and the mass is not attached to the spring in any way. When the spring has been compressed enough to store 15.0 of...
*October 23, 2011*

**math**

what is the product of 93 and 23
*September 12, 2011*

**physics**

486.576
*June 29, 2011*

**math**

a number cube numbered 1 through 6 is rolled.what is the probabilty of rolling a prime number.
*May 11, 2011*

**chemistry**

Explain how you would prepare the following dilute solutions from the more concentrated ones: a. 200ml of .500M HCL from a 6.00M HCL solution.
*April 4, 2011*

**science**

definition of light, transmission, and absorption
*February 16, 2011*

**math**

I have a flagpole 30 feet tall amirror 10 feet from pole and someone standing 2 feet from mirror how tall are they
*January 12, 2011*

**5th grade Math**

I need to know how to write in word form how 7/8 is greater than 5/6
*January 5, 2011*

**geometry**

a rectangle with a length of 32 units and a width of 18 units; find the length of a diagonal.
*November 18, 2010*

**11 grade physics**

A box is given a push so that it slides across the floor. How far will it go, given that the coefficient of kinetic friction is 0.24 and the push imparts an initial speed of 4.2 m/s?
*November 14, 2010*

**11 grade physics**

A force of 23.0 N is required to start a 3.0 kg box moving across a horizontal concrete floor. (a) What is the coefficient of static friction between the box and the floor? 1 (b) If the 23.0 N force continues, the box accelerates at 0.50 m/s2. What is the coefficient of ...
*November 14, 2010*

**math**

find the n. 4 x n = 9 + 3. what do i do?
*October 26, 2010*

**Math (money)**

THANK YOU MIS.SUE!
*October 26, 2010*

**Math (money)**

yea. thats what i got. Thanks!
*October 26, 2010*

**Math (money)**

$17.00?
*October 26, 2010*

**Math (money)**

$5.00?
*October 26, 2010*

**Math (money)**

How much money is in 350 nickles?
*October 26, 2010*

**Geometry**

ef=2x-15, fg=3x-15,eg=23 find the values of x,ef and fg
*October 19, 2010*

**math**

the lowest and the highest number that will round to .035
*October 9, 2010*

**Math**

Thanks!
*October 5, 2010*

**Math**

is the answer 25?
*October 5, 2010*

**Math**

thanks. really needed the help.
*October 5, 2010*

**Math**

James has an assigned seat for his flight to Denver. The seats on the plane are numbered 1-49. James's seat number is an odd number greater than 10 that is factor of 100. what is his seat number for the flight?
*October 5, 2010*

**physics**

Two people are pulling a boat through the water as in the figure below. Each exerts a force of 600 N directed at a è = 45.0° angle relative to the forward motion of the boat. If the boat moves with constant velocity, find the resistive force exerted by the water on ...
*October 4, 2010*

**physics**

A car starts from rest and accelerates to a speed of 25 m/s in a time of 6 seconds. What os the acceleration of this car?
*October 1, 2010*

**English 152**

No, that's not what I'm trying to do. I need to pick out the base clause from the sentences and then number the modifiers in the correct order. Thanks for the help, though.
*September 23, 2010*

**English 152**

I need to sentence level this paragraph and I'm not sure if I'm correct. A counter-swirl had caught Farquhar and turned him half around; he was again looking into the forest on the bank opposite the fort. The sound of a clear, high voice in a monotonous singsong now ...
*September 23, 2010*

**pre-algebra**

just trying to study aldrabra cause im been doing bad in school
*September 13, 2010*

**6th grade math**

how can you change a one dollar bill into exactly 50 coins, using at least one penny, one nickel, one dime and one quarter please?
*September 13, 2010*

**physics**

well do you know an equation to solve it
*September 7, 2010*

**physics**

A truck is stopped at a stoplight. When the light turns green, it accelerates at 2.2 m/s2. At the same instant, a car passes the truck going 11 m/s. Where and when does the truck catch up with the car?
*September 7, 2010*

**math**

10^-3
*August 30, 2010*

**math**

5x+3/5-5x-4/7
*August 29, 2010*

**business**

International issues of social responsibility and ethical behavior are: 1.the result of greed found in capitalist countries. 2.found primarily in countries with a low standard of living. 3. a concern only of business professors. 4. difficult and not as clear-cut as U.S. firms ...
*August 1, 2010*

**business**

A recent study revealed that most Americans have: a.strong moral values b. a strong desire to do what is right c. few moral absolutes d. a great desire to help their community
*July 24, 2010*

**!chemistry !experiment!**

Design an experiment which is not a tritation, you could use to calculate the percentage of water of crystalallization in NA2CO3.xH20. Need apparatus, detailed method including precutions and assumptions, how the results are recorded and how the percentage is calculated
*June 1, 2010*

**Geometry**

If hexagon A is similar to hexagon B and hexagon B is similar to hexagon C, then what conclusion can be drawn? What property does this illustrate?
*April 6, 2010*

**5th grade MATH!!!!!**

Thank u so much!!!!!! :-)
*March 22, 2010*

**5th grade MATH!!!!!**

Can a line segment have two midpoints? EXPLAIN!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
*March 22, 2010*