Thursday

February 23, 2017
Total # Posts: 1,828

**Physics**

A 390 kg motor boat, moving down a frictionless ramp, is connected over a massless pulley to a 193 kg counterweight that rests on a horizontal surface. The ramp is inclined by 28.6°, and the co-efficient of kinetic friction between the couterweight and the horizontal ...

*January 25, 2011*

**physics**

A major-league pitcher can throw a baseball in excess of 40.2 m/s. If a ball is thrown horizontally at this speed, how much will it drop by the time it reaches the catcher who is 17.7 m away from the point of release?

*January 21, 2011*

**physics**

If this question is Webassign related, you may have to 1/2 the answers you plug into the textbox, like I did. Bub Pursley describes it correctly.

*January 17, 2011*

**physics**

sealed metal container can withstand a pressure difference of 0.630 . The container initially is filled with an ideal gas at 12 and 0.80 To what temperature can you cool the container before it collapses? (Ignore any changes in the container's volume due to thermal expansion

*January 15, 2011*

**English 3**

Great Gatsby Chapter 1. Why is Nick telling the story? Why is nick "confused and disgusted" at the end of this chapter?

*January 13, 2011*

**Chemistry**

U+F6-->UF6 If 8.4 g UF6 are recovered from 55 kg of ore, what is the weight % of uranium in the ore? Answer in units of %

*January 11, 2011*

**math**

The equations y=-2X+12, y=6-X, and X=0 enclose a region in quadrant I. when that region is reflected over the line y=6-X, a portion of the reflection is in quadrant II. Find the area of that resulting region.

*January 11, 2011*

**Criminal justice**

Can someone please help. Who is responsible for the concept of crime prevention? Ive been stuck on this question for two days and i need help urgent. Thank you!

*January 8, 2011*

**Statistics**

In a study to determine if you can predict stock price based on P-E ratio, what is the response variable and what is the explanatory variable? How would you label the X and Y axes in a scatterplot of the data?

*January 4, 2011*

**physics**

a 4.0 m hockey puck is moving horizontally at 5.0 m/s. the amount of work that must be done on the puck to stop it is?

*December 19, 2010*

**calc**

Given [(x-5)/(x-3)]^2 . Find any stationary points and any points of inflection. Also find any horizontal and vertical asymptotes.

*December 19, 2010*

**us history**

it started on 1879. They fought over riches.bob shbaca was the leader.

*December 16, 2010*

**chemistry**

When NH3(aq) is added to Cu^2+ (aq) a precipitate initially forms. what is its formula?

*December 14, 2010*

**7th Grade Math**

14÷2=7 7 +14=21 21×2=42 42×2=84 Answer:84 this isn't hard I'm 6 grade

*December 14, 2010*

**Physics**

A 16kg child on roller skates rolls 2m down an incline at 20 degrees with the horizontal. With no friction, what is the total kinetic energy of the child at the bottom of the incline?

*December 13, 2010*

**Chemistry**

Gravimetric analysis does not always involve a precipitate. Consider the following problem. A mixture of calcium carbonate and calium oxide has a mass of 8.35 grams. When heated strongly, the CaCO3 in the sample decomposes into solid CaO and carbon dioxide gas. The calcium ...

*December 10, 2010*

**History**

Can you please find any documents (pictures, quotes, info) for the following question: Compare and contrast the economy and politics that impacted the global economy of Europe during the Middle Ages and the Renaissance. Thank You

*December 9, 2010*

**H NMR**

what is the structure of the compound that is an obvious question for NMR

*December 8, 2010*

**orgo - H NMR**

C4 H10 O2 ppm = 3.25 singlet 6H ppm = 3.45 singlet 4H

*December 8, 2010*

**H NMR**

C4 H10 O2 ppm = 3.25 singlet 6H ppm = 3.45 singlet 4H

*December 8, 2010*

**Chemistry**

Gravimetric analysis does not always involve a precipitate. Consider the following problem. A mixture of calcium carbonate and calium oxide has a mass of 8.35 grams. When heated strongly, the CaCO3 in the sample decomposes into solid CaO and carbon dioxide gas. The calcium ...

*December 8, 2010*

**Chemistry**

Gravimetric analysis does not always involve a precipitate. Consider the following problem. A mixture of calcium carbonate and calium oxide has a mass of 8.35 grams. When heated strongly, the CaCO3 in the sample decomposes into solid CaO and carbon dioxide gas. The calcium ...

*December 7, 2010*

**Chemistry**

Gravimetric analysis does not always involve a precipitate. Consider the following problem. A mixture of calcium carbonate and calium oxide has a mass of 8.35 grams. When heated strongly, the CaCO3 in the sample decomposes into solid CaO and carbon dioxide gas. The calcium ...

*December 6, 2010*

**science**

If you have 3 liters of air in your lungs and 2/10 of that is oxygen, how many millimeters are in your lungs?

*December 6, 2010*

**Precalculus Someone please help**

Evaluate all six trigonometric functions at t, where the given point lies on the terminal side of an angle of t radians in standard position. (40/41, -9/41)

*December 6, 2010*

**physics**

The drawing shows a hydraulic chamber in which a spring (spring constant = 1292 N/m) is attached to the input piston, and a rock of mass 24.7 kg rests on the output plunger. The piston and plunger are at the same height, and each has a negligible mass. By how much is the ...

*December 6, 2010*

**Physics**

A bat can detect small objects, such as an insect, whose size is approximately equal to one wavelength of the sound the bat makes. If bats emit a chirp at a frequency of 50.0 kHz, and if the speed of sound in air is 340 m/s, what is the smallest insect a bat can detect?

*December 5, 2010*

**Physics**

A object-spring system oscillates with an amplitude of 4.0 cm. If the spring constant is 210 N/m and object has a mass of 0.50 kg, determine each of the following values. (a) the mechanical energy of the system J (b) the maximum speed of the object m/s (c) the maximum ...

*December 5, 2010*

**Physics**

The blades of a ceiling fan have a radius of 0.399 m and are rotating about a fixed axis with an angular velocity of +1.65 rad/s. When the switch on the fan is turned to a higher speed, the blades acquire an angular acceleration of 2.08 rad/s2. After 0.520 s have elapsed since...

*December 4, 2010*

**physics**

The drawing shows a hydraulic chamber in which a spring (spring constant = 1292 N/m) is attached to the input piston, and a rock of mass 24.7 kg rests on the output plunger. The piston and plunger are at the same height, and each has a negligible mass. By how much is the ...

*December 4, 2010*

**physics**

What is the longest wavelength for standing sound waves in a 102.0 cm long tube that is open at both ends?

*December 4, 2010*

**ms.sue**

so it would b 11 then

*December 1, 2010*

**ms.sue**

if y+2=13 woudlnt you add 2 too both sides amd get y=15?

*December 1, 2010*

**Algebra**

whats the problem?

*December 1, 2010*

**math**

so if u flip it the negative sign will go away and turn it too positive

*December 1, 2010*

**math**

1/3b=-3 i know u would divide both sides by 1/3 and it would cancell out the 1/3 and when u divide 1/3 by -3 you will get -1/9 so u flip it u willl get -9 right?

*December 1, 2010*

**Math**

it would b 145,000 right?

*December 1, 2010*

**Algebra 1**

u r right

*December 1, 2010*

**math**

wow i feel stupid

*December 1, 2010*

**math**

do u have too add or subtract the like terms bc if u subtract 5b-6b it will equal too -1b and then u subtract -6--7 it will equal too 1 so then it would b 1=-1b

*December 1, 2010*

**math**

-6+5b=6b-7

*December 1, 2010*

**algebra1**

then i get -21/1

*December 1, 2010*

**algebra1**

i get up too 1/3a=-7

*December 1, 2010*

**algebra1**

1+1/3a=-6

*December 1, 2010*

**math**

so it would b x=4

*December 1, 2010*

**math**

1/2x=2

*December 1, 2010*

**algebra1**

hey damon i need help on mine thank u

*December 1, 2010*

**Algebra uno help please. :)**

where does the 8 come into the problem at?

*December 1, 2010*

**math**

8-7b=-6b+9

*December 1, 2010*

**College Algebra**

65437990

*December 1, 2010*

**physics help me please!**

i think it would be b too bc the degress dropps from 40 to 30 so im saying your right on b

*November 30, 2010*

**math**

Solve for x. -3x - 8 + 6x = 7

*November 30, 2010*

**algebra1**

-3+8x-8=-8 how do u solve it?

*November 30, 2010*

**physics**

what would the third longest be? cause i know that the second longest would be what you just said obviously, but the third one cant be half of that, or zero, so im a little confused

*November 30, 2010*

**physics**

What is the longest wavelength for standing waves on a 238.0 cm long string that is fixed at both ends?

*November 30, 2010*

**physicS**

What is the longest wavelength for standing waves on a 238.0 cm long string that is fixed at both ends?

*November 30, 2010*

**algebra1**

(w-9)*(w-4) im really struggling ppl plz help

*November 30, 2010*

**geometry**

solve this equation (w-9)*(w-4)

*November 30, 2010*

**Math**

Solve for x : 16y^2=120x-225

*November 28, 2010*

**Physics**

An FM radio station broadcasts at 80.9MHz. Determine the period of the radio waves. i know period is just 1/freq. so what would i convert 80.9 MHz into???

*November 27, 2010*

**Physics**

An FM radio station broadcasts at 80.9MHz. Determine the period of the radio waves. i know period is just 1/freq. so what would i convert 80.9 MHz into???

*November 27, 2010*

**college economics**

A decrease in aggregate supply means: A. Both the real domestic output and the price level would decrease B. The real domestic output would increase and rises in the price level would become smaller C. The real domestic output would decrease and the price level would rise D. ...

*November 27, 2010*

**chemistry**

the h20 and s02 you do not have any carbon though to work with it?

*November 23, 2010*

**chemistry**

What mass of carbon dioxide, water, and sulfur dioxide can be produced from the combustion of 1.5793g of C7H12S?

*November 23, 2010*

**Chemistry**

Suppose that a 10-mL sample of a solution is to be tested for Cl- ion by addition of 1 drop (0.2mL ) of 0.15 M AgNO3 . What is the minimum number of grams of Cl- that must be present in order for AgCl(s) to form?

*November 20, 2010*

**Chemistry**

Calculate the pH at the equivalence point in titrating a 0.120 M solution of NaHCrO4 (sodium hydrogen chromate) with 7.0×10−2 NaOH. Please help!

*November 20, 2010*

**Chemistry**

Calculate the pH at the equivalence point in titrating a 0.120 M solution of NaHCrO4 (sodium hydrogen chromate) with 7.0×10−2 NaOH.

*November 20, 2010*

**Chemistry**

Suppose that a 10-mL sample of a solution is to be tested for Cl- ion by addition of 1 drop (0.2mL ) of 0.15 M AgNO3 . What is the minimum number of grams of Cl- that must be present in order for AgCl(s) to form?

*November 20, 2010*

**chemistry**

12

*November 18, 2010*

**math**

48 divided by 3796

*November 16, 2010*

**organic chem**

convert butane to 3-pentanol using any reagents and organometalics.

*November 16, 2010*

**Chemistry**

Cl is gaining elections which means it is the reduction half reaction. Reduction is associated with the Cathode. E(cell) = E(cathode) - E(anode) 0.35v = 1.36v - E(anode) solving for E(anode) gives you 1.01v

*November 15, 2010*

**geometry**

Given quadrilateral ABCD, with A = 4x - 57 and C = x + 3, what value of x ensures that ABCD is a parallelogram?

*November 11, 2010*

**algebra**

How do you make 36 the area and 26 premeter

*November 10, 2010*

**math Dr. R**

ok. "what is 1/3 of $3900" and if i would be using a calculator how would i input it

*November 9, 2010*

**math**

if im trying to get the answer to "what is one third of 190" how would i input it on a calculator

*November 9, 2010*

**math**

yes, but iknow the answer, my issue is is how do i get answer if im trying to use a calculator

*November 9, 2010*

**math**

if im trying to get 1/3 from 190, how would i get the answere by calculator

*November 9, 2010*

**chemistry**

Help!! Can someone please show me how to set up this problem. I'm lost. C3H8+5O2-->3CO2+4H20 If 19.2g of C3H8 and 19.2g O2 react, how many moles of CO2 can be produced?

*November 5, 2010*

**chem**

How do you find out the final Fe

*November 4, 2010*

**college chemistry**

SWAG

*November 4, 2010*

**english**

Wut is a compound predicate

*November 3, 2010*

**Physics**

A woman runs a kilometer using a force of 210 N and a power output of 500 W. How long in minutes does it take this woman to complete 1 kilometer?

*November 2, 2010*

**chemistry**

so is is set up like 356.2J=25.0g(36.5C-22.0C) ?

*October 31, 2010*

**chemistry**

a 25.0g sample of magnesium at 22.0 degrees C absorbs 356.3 J of heat. The temperature of magnesium rises to 36.5 degrees C. What is the specific heat of the magnesium?

*October 31, 2010*

**biology**

Yes there still would have been a source of carbon dioxide being introduced into the water. "Carbon Dioxide is present in water in the form of a dissolved gas.Surface waters normally contain less than 10 ppm free carbon dioxide, while some ground waters may easily exceed ...

*October 28, 2010*

**Chemistry**

Is it still a single displacement reaction? can you walk me through predicting the reaction and then balancing it. I'm lost.

*October 27, 2010*

**Chemistry**

Can anyone tell me why the answer that I got here is not correct? Pb(s) + AgNO3(aq) yields Ag(s) + PbNO3(s)

*October 27, 2010*

**3rd grade shurley english**

what does s, f,scs, scv mean when indentifying(labeling) sentences thanks

*October 26, 2010*

**Signals**

I have the following information: H(jw) = (3+jw)/(e^(2jw)) f(t) = e^(-3t)u(t) Therefore, F(w) = 1/(3+jw) Y(w) = H(w)*F(w) = 1/(e^(2jw)) I have to find y(t), but I am having troubling finding.

*October 22, 2010*

**physics**

A model rocket is constructed with a motor that can provide a total impulse of 25.5 N · s. The mass of the rocket is 0.213 kg. What is the speed that this rocket achieves when launched from rest? Neglect the effects of gravity and air resistance.

*October 21, 2010*

**chemistry**

how many atoms are in 26 moles of Ag

*October 21, 2010*

**algebra**

I don;t know how to solve the following equation. 9+6x=-6x+105 I have -6x +6x -105 -105 -96=12x 12 12 x=8

*October 21, 2010*

**algebra**

I don;t know how to solve the following equation. 9+6x=-6x+105 I have -6x +6x -105 -105 -96=12x 12 12 x=8

*October 21, 2010*

**math**

how do you solve 0.32/8.64=

*October 18, 2010*

**math**

write an expression.there were22 students in the clsass but some were absent

*October 18, 2010*

**math**

find the value of expression 5+2+6 (8-7)+1 6-(3+1)

*October 18, 2010*

**11th grade**

vix = 4.33 viy = 2.5 vx = 4.33 viy = -2.5 vix= 5 * cos(30) viy= 5 * sin (30) vx= the same because no force is acting on it vy= -viy because nature of parabolic motion and ball is travelling down

*October 17, 2010*