Monday

September 1, 2014

September 1, 2014

Total # Posts: 942

**Physics**

A string has a linear density of 6.2 x 10-3 kg/m and is under a tension of 250 N. The string is 1.2 m long, is fixed at both ends, and is vibrating in the standing wave pattern shown in the drawing. Determine the (a) speed, (b) wavelength, and (c) frequency of the traveling ...
*March 3, 2013*

**Physics**

A string is fixed at both ends and vibrating at 120 Hz, which is its third harmonic frequency. The linear density of the string is 4.9x10-3 kg/m, and it is under a tension of 3.6 N. Determine the length of the string.
*March 3, 2013*

**math**

PEMDAS (order of operation) 6-0+1 6+1 7
*February 26, 2013*

**Algebra**

-3x+6-1>2-5x+30 -3x+5>-5x+32 -3x>-5x+27 2x>27 x>27/2
*February 26, 2013*

**math**

PV=RT PV/R=T
*February 26, 2013*

**Math**

Thank you so much for your time!!!!! Both you and Ms Sue; Thank you!!!!!
*February 20, 2013*

**Math**

39????
*February 20, 2013*

**Math**

What number is 3/5 of 65?
*February 20, 2013*

**Math**

2.5?
*February 20, 2013*

**Math**

If the diameter of a circle is 5 in., what is the radius? What is the relationship of the diameter of a circle to radius?
*February 20, 2013*

**Math**

49 3/3= 49+ 1= 50?
*February 20, 2013*

**Math**

33 1/3%+16 2/3%=
*February 20, 2013*

**Math**

The school has raised $1,200 over the last 2 years. This year the school raised $200 more then last year. How much money did the school raise last year?
*February 20, 2013*

**math**

Shirley and Amy painted faces at the fair for an hr. sixteen children had their faces painted. Shirley was able to paint 3 times as many faces as Amy. How many faces did each girl paint?
*February 20, 2013*

**edu**

i chose d cause i read something about it but i reread and b would be the most appropriate answer
*February 19, 2013*

**edu**

Children learn help care skills best when a.teachers teach them carefully b. they are part of their daily routine c.they are mature enough to learn them d.adults provide a great deal of assistance I think d am i correct
*February 19, 2013*

**edu**

Child-teaching-child events: a. focus children to be friends b.are not beneficial to exceptional children c.incorporate opportunities for affection within songs and games d.have to be done every day to be effective I think c or d not sure need help mostly c am i correct
*February 19, 2013*

**edu**

Which of the following statements is true? a.Language is learned only when it is taught b.Language cannot be taught c.Maturation alone accounts for the development of language d.Most children are born with a potential for language I think a. not sure though am i correct
*February 18, 2013*

**Writing**

What are ways that animals can help each other
*February 12, 2013*

**Business Need Help ASAP**

What can I use as key words to search for information regarding REI's SCM? I have been on this assignment forever and trying to think of some more important information regarding REI's SCM.
*February 8, 2013*

**Math**

Emil had great luck at the game,but Kim did not. Together they won 16 prizes. Emu won 10 more than Kim. How many did each win?
*February 7, 2013*

**Chemistry**

If anyone could do a step by step it would be appreciated.
*February 7, 2013*

**Chemistry**

The burning if 18.0 g of carbon produces 55.0 g of carbon dioxide. What is the theoretical yield of CO2? Calculate the percent yield of CO2.
*February 7, 2013*

**Math**

Sue and bob both jumped rope to raise money. Together they earned $24. Sue earned twice as much as bob. How much money did each earn?
*February 7, 2013*

**Math**

What fraction of a circle is 33-1/3% of a circle?
*February 6, 2013*

**Math**

What fraction is half of the fraction that is half of 1/2?
*February 6, 2013*

**Math**

There were 20 more fifth graders then fourth graders. 140 students from both grades. How many fifth graders were there?
*February 6, 2013*

**math**

Eric and Albert won prizes for selling the most raffle tickets. Together they sold 100 tickets. Albert sold 16 tickets more than Eric. How many tickets did each sell?
*February 6, 2013*

**algebra**

Eric sold 16 more tickets then Albert. Together they sold 100 tickets. How many did each person sell?
*February 6, 2013*

**Math**

Can a triangle have parallel line segments. And is any line segment in the drawing parallel to the line segment AB? The figure is.a triangle
*February 4, 2013*

**computers**

what are calculations entered into a spreadsheet called is it formulas or values i think formulas am i correct?
*January 30, 2013*

**MATH**

There are 5 male students to every 9 female students at a local school. Select the statement of the condition when there are 30 male students
*January 29, 2013*

**buisness essentials**

Ricki Cohn Encyclopedia sales Commission rate: 11% Month’s sales: $2,550 What is the monthly commission?
*January 23, 2013*

**Physics**

Suppose that there is a partial blockage of the aorta, which normally pumps about 5 L of blood per minute. If the diameter of the aorta were reduced by 30%, what increase in blood pressure gradient would be needed to obtain the normal flow rate? (Assume that Poiseuille’s ...
*January 18, 2013*

**Physics**

A block of mass m = 3.40kg and charge q = 1.50C is on an incline plane that makes an angle è = 33.0o with the horizon. An applied electric field is parallel with the incline as shown in the above diagram. What must the value of the applied electric field be to keep the ...
*January 17, 2013*

**math**

A 2 m tall person standing on the ground looks up at an angle of 34.0 o with the horizontal and sees the top of a tree and the top of a building aligned. The tree is 20 m away from the person, and the building is 51.0 m from the person
*January 15, 2013*

**math**

A 2 m tall person standing on the ground looks up at an angle of 34.0 o with the horizontal and sees the top of a tree and the top of a building aligned. The tree is 20 m away from the person, and the building is 51.0 m from the person
*January 15, 2013*

**Physics**

A car (mass = 1080 kg) is traveling at 25.4 m/s when it collides head-on with a sport utility vehicle (mass = 2750 kg) traveling in the opposite direction. In the collision, the two vehicles come to a halt. At what speed was the sport utility vehicle traveling?
*January 2, 2013*

**Physics**

A 48.8-kg skater is standing at rest in front of a wall. By pushing against the wall she propels herself backward with a velocity of -1.88 m/s. Her hands are in contact with the wall for 0.763 s. Ignore friction and wind resistance. Find the average force she exerts on the ...
*January 2, 2013*

**math**

mike runs for 5 of an hour at a speed of 7.5 km/h and cycles for 15 minutes at 12 km/h.how far does he go
*December 25, 2012*

**math**

Thank You Ms Sue i understand to finish rest of the proublems!
*December 11, 2012*

**math**

find the range of the following sets of numbers: 247, 562, 498, 149, 568, 327, and 470.
*December 11, 2012*

**Writing**

What is the predicate of this sentence,Henry and Mudge hear something.Is hear something the predicate
*December 11, 2012*

**Physics**

An ice skater of mass m is given a shove on a frozen pond. After the shove she has a speed of 2m/s. Assuming that the only horizontal force that acts on her is a slight frictional force between the blades of the skates and the ice: a.) Identify the horizontal force and two ...
*December 9, 2012*

**Physics**

An object of mass .550kg is lifted from the floor to a height of 3.5m at a constant speed. If the object is released from rest after it is lifted, what is its kinetic energy just before it hits the floor? What is its velocity? Show your work and units.
*December 9, 2012*

**Physics**

Two objects of different mass start from rest, are pulled by the same magnitude net force, and are moved through the same distance. The work done on object A is 500J. After the force pulled each object, object A moves twice as fast as object B. Answer the following: a.) How ...
*December 9, 2012*

**Physics**

Thank You
*December 9, 2012*

**Physics**

An object of mass .550kg is lifted from the floor to a height of 3.5m at a constant speed. How much work is done by the lifting force (include units)? b.) How much work is done by the Earth on the object? c.) What is the net work done on the object? d.) What is the change in ...
*December 9, 2012*

**math**

multiply the fraction 9/15 by the fraction 30/72 and reduce your answer to the lowest terms
*December 9, 2012*

**math**

convert the mixed number 14 5/7 to a mixed decimal. round to the nearest hundreth
*December 8, 2012*

**math**

divid the fraction 14/27 by the fraction 2/3 and reduce your answe to the lowest terms
*December 8, 2012*

**math**

find the value of G in the equation G/5-13=42
*December 8, 2012*

**Algebra II**

Factor: 12x^2+13x-35 I need help on how you would go about doing this. I only understand when 1 is the coefficient for the x^2 term.
*December 5, 2012*

**Physics**

A race car travels 110 m/s around a circular track of radius 197 m. The track is banked at 22 degrees from the horizontal with a friction constant of 0.14. What is the magnitude of the resultant force on the 2800 kg driver and his car of the car does not slip?
*December 4, 2012*

**math**

A family drives 600 miles in 2 days. The second day they drive 120 miles less than the first day How many miles did they drive the first day?
*December 2, 2012*

**Physics**

A 10 ohm resistor is connected in series with a 15 ohm resistor. If this circuit is connected to a 9 volt battery, what will be the resultant current?
*November 29, 2012*

**Algebra II**

When I have (2x)^2 2x on the paper the 2x to the right is right after the squared. So its (((2x) squared 2x) squared 2x) squared
*November 28, 2012*

**Algebra II**

How would you go about doing this problem? I've tried and with the answer given I still can't figure it out. If anyone could explain it would be greatly appreciated! (((2x)^2 2x)^2 2x)^2
*November 28, 2012*

**Math (5th grade )**

Kathy's mom has made a batch of lemon bars. Her treats are in a rectangular pan that measures 12" x 8". She will cut a vertical and horizontal live every 2 inches along the length and width of the pan. How many bars will each person receive
*November 27, 2012*

**Physics**

Carrying household appliances can be very difficult due to the weight and size. Some movers place the appliance on a dolly and move it around, however this can cause damage to floors, and it also does not work on stairs. A new technique is to utilize moving straps. These allow...
*November 25, 2012*

**Physics**

You are the designer of a school bus and would like to know what the maximum stopping distance is that will ensure the students to remain in their seats. The coefficient of static friction for the passenger and the bus seat is .5, and the coefficient of kinetic friction for ...
*November 25, 2012*

**Physics**

Two people push on a box that has a mass of 10kg, the person on the right has a mass of 86kg and applies a horizontal force of 50N. The person on the left has a mass of 45kg. The coefficient of kinetic friction between the box and the floor is .2, the coefficient of static ...
*November 25, 2012*

**Physics**

Two blocks, (Mass of block 1 = 2.3kg, Mass of block 2 = 1.2kg), are in contact on a frictionless table. If a horizontal force of 3.2N is applied to the larger block, what is the acceleration of the smaller block. Describe all external forces that are acting on the two blocks
*November 25, 2012*

**Physics **

You have setup an experiment with two 50g masses attached to strings that are connected on opposite sides of a scale that measures weight in Newtons. a.) What is the reading on the scale? b.) The whole system is now moving to the left at a speed of 10m/s. What is the reading ...
*November 25, 2012*

**Physics**

Two blocks, (Mass of block 1 = 2.3kg, Mass of block 2 = 1.2kg), are in contact on a frictionless table. If a horizontal force of 3.2N is applied to the larger block, what is the acceleration of the smaller block. Describe all external forces that are acting on the two blocks
*November 25, 2012*

**Physics**

Two people push on a box that has a mass of 10kg, the person on the right has a mass of 86kg and applies a horizontal force of 50N. The person on the left has a mass of 45kg. The coefficient of kinetic friction between the box and the floor is .2, the coefficient of static ...
*November 25, 2012*

**Physics**

You are the designer of a school bus and would like to know what the maximum stopping distance is that will ensure the students to remain in their seats. The coefficient of static friction for the passenger and the bus seat is .5, and the coefficient of kinetic friction for ...
*November 25, 2012*

**Physics**

Anyone?
*November 25, 2012*

**Physics **

Carrying household appliances can be very difficult due to the weight and size. Some movers place the appliance on a dolly and move it around, however this can cause damage to floors, and it also does not work on stairs. A new technique is to utilize moving straps. These allow...
*November 25, 2012*

**Physics**

Police examine the scene of an accident involving two cars, which is parked. The skid marks of the moving car, which nearly came to a stop before the collision, is 80 meters long. The coefficient of kinetic friction between rubber and the pavement is about .80. Estimate the ...
*November 25, 2012*

**Math Ms. Sue**

What is the slope of the line that passes through (-12.5,3.2)(-15.5,-7.2)? I think the answer is: -10.4/-3.5. Not sure on this one
*November 19, 2012*

**Math Ms. Sue**

What is the slope of the line that passes through (3/5,-2)(-6,2/9)? I don't even have a good guess at this one. Thanks.
*November 19, 2012*

**Math Ms. Sue**

What is the slope of the line that passes through (3/5,-2)(-6,2/9)? I don't even have a good guess at this one. Thanks.
*November 19, 2012*

**Math**

What is the slope of the line that passes through (3/5,-2)(-6,2/9)? I don't even have a good guess at this one. Thanks.
*November 19, 2012*

**Math Ms. sue**

What is the slope of the line that passes through (-12.5,3.2)(-15.5,-7.2)? I think the answer is: -10.4/-3.5. Not sure on this one.
*November 19, 2012*

**Math **

What is the slope of the line that passes through (-12.5,3.2)(-15.5,-7.2)? I think the answer is: -10.4/-3.5. Not sure on this one.
*November 19, 2012*

**Math Ms. sue**

What is the slope of the line that passes through (5,8)(17,2)? I think the answer is: -1/2 (1 over 2)
*November 19, 2012*

**Math**

What is the slope of the line that passes through (5,8)(17,2)? I think the answer is: -1/2 (1 over 2)
*November 19, 2012*

**calculus**

okay i need to find the derivative of f(x)=cosπ(x^2) and if you could show steps it would be GREATLY appreciated. thank you so much!
*November 14, 2012*

**calculus**

Hey, thank you so much! you did help! the second is x squared.. sorry for no being clear
*November 13, 2012*

**calculus**

okay i need to find the derivative of f(x)=πsin2x and f(x)=cosπx^2 ---------------- π is pi and if you could show steps it would be GREATLY appreciated. thank you so much!
*November 13, 2012*

**Physics**

Traveling at a speed of 20.0 m/s, the driver of an automobile suddenly locks the wheels by slamming on the brakes. The coefficient of kinetic friction between the tires and the road is 0.540. What is the speed of the automobile after 1.11 s have elapsed? Ignore the effects of ...
*November 13, 2012*

**Physics**

A 96.6-kg person stands on a scale in an elevator. What is the apparent weight when the elevator is (a) accelerating upward with an acceleration of 1.79 m/s2, (b) moving upward at a constant speed, and (c) accelerating downward with an acceleration of 1.14 m/s2?
*November 13, 2012*

**Physics**

An airplane has a mass of 2.04 × 104 kg and takes off under the influence of a constant net force of 2.18 × 104 N. What is the net force that acts on the plane's 86.0-kg pilot?
*November 13, 2012*

**Math**

How do I begin to simplify this? 3x/(4x-5y)=6ay-14b
*November 12, 2012*

**Physics**

Object A is moving due east, while object B is moving due north. They collide and stick together in a completely inelastic collision. Momentum is conserved. Object A has a mass of mA = 17.9 kg and an initial velocity of = 8.82 m/s, due east. Object B, however, has a mass of mB...
*November 4, 2012*

**math**

If half the batch of 6,000 vials are contaminated, what is the probability of finding no contaminated vials if only two vials are selected from the total amount produced?
*November 1, 2012*

**physical**

You are on a train that is traveling at 3.0 m/s along a level straight track. Very near and parallel to the track is a wall that slopes upward at a 12° angle with the horizontal. As you face the window ( 0.715 m high, 2.29 m wide) in your compartment, the train is moving ...
*October 28, 2012*

**Physics**

The drawing shows two frictionless inclines that begin at ground level (h = 0 m) and slope upward at the same angle θ. One track is longer than the other, however. Identical blocks are projected up each track with the same initial speed v0. On the longer track the block ...
*October 28, 2012*

**Physics**

The drawing shows two frictionless inclines that begin at ground level (h = 0 m) and slope upward at the same angle θ. One track is longer than the other, however. Identical blocks are projected up each track with the same initial speed v0. On the longer track the block ...
*October 24, 2012*

**chemistry**

A 25.00 mL solution of potassium nitrate (KNO3) was diluted to 125.0 mL, and 25.00 mL of this solution were then diluted to 1.000 103 mL. The concentration of the final solution is 0.00421 M. Calculate the concentration of the original solution.
*October 1, 2012*

**Physics**

A man in an elevator is 79kg. The elevator itself is 860kg. As the elevator begins to move down, a scale the man is standing on reads 437N. How do I determine the acceleration of the elevator? (I tried dividing the force of the man by his mass, it was incorrect)
*September 27, 2012*

**Grade 11 Math**

Here's the question: You are attending a very loud concert. To avoid permanent ear damage, you decide to move farther from the stage. Sound intensity is given by the formula: I = k/d squared K= constant D = distance from the listener to the source of sound. Determine an ...
*September 25, 2012*

**pre algebra**

What is the rule for this pattern? 1,negative 2,4, negative 5,7,negative8. Thanks
*September 23, 2012*

**math**

Radius of a circle with a sector area of 3 square ft determined by a central angle 1/4 radian
*August 27, 2012*

**math**

complete the square 16x-12y=4y^2+1
*August 25, 2012*

**Math add a bit of clarity**

The * is showing a multiplication sign. The number before / is the numerator and after is the denominator. This has to do with proportions and cross products but I am not understanding the rules/principles here.
*August 25, 2012*

**Math**

Given the formula Xc=1/6.28fC, find C if Xc =500 and f=2000. What are the rules that take me from 500/1 = 1/6.28*2000*C to the next step of: C=1*1/500*6.28*2000 ?
*August 25, 2012*

**Calculus**

Is the answer 2.25 v
*August 21, 2012*

**Calculus**

A 15.2-F capacitor has an initial voltage of 2.00 V. It is charged with a current given by i=tã5=t^2. Find the voltage across the capacitor at 1.75 seconds.
*August 21, 2012*

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