# Posts by AAA

Total # Posts: 85

**geometry**

Let the incircle of triangle $ABC$ be tangent to sides $\overline{BC}$, $\overline{AC}$, and $\overline{AB}$ at $D$, $E$, and $F$, respectively. Prove that triangle $DEF$ is acute. I have tried proving that triangle DEF's angles were les than the opposite angles in ...

*March 17, 2017*

**math**

B owes $3000 due 2 years from today without interest and $2000 with interest at 4% compounded quarterly due in 6 years from today.if money worth is 5% compounded semiannually what single payment made 4 years from today will discharge his debts?

*February 19, 2017*

**math**

if one card is drawn from a normal pack of 52 playing cards,what is the probability of getting a king or a heart?

*February 18, 2017*

**math**

given the following equations: 2x-3y=10 3x=4y=15 which one of the regression equation x on y? show computation

*February 17, 2017*

**Math**

The denominator of a certain fraction exceeds the numerator by 1. The reciprocal of the fraction exceeds 3/4 by 7/12. Find the fraction.

*September 7, 2016*

**math**

two brothers together owned 1/3 of a small rice mill valued at 1,260.000. One brother owned 3/7 as much as the other. What is the value of each one's share

*September 7, 2016*

**english**

is evil in humanity a social issue? if not, how can i turn it into one? or is there a social issue that is similar to evil in humanity.

*June 19, 2016*

**physics**

If the string on a violin is 25.4cm long and produces a fundamental tone of frequency of 440Hz, by how much must it be shortened to produce a fundamental tone of frequency of 523.3Hz. is there a specific formula to follow? like, how do you know what to do?

*March 7, 2016*

**math**

Can somebody help? A = 0,5x + 4 B = 0,5x + 8 x=? I need x.

*November 6, 2015*

**Math HELP! Ms.Sue**

What is the probability of selecting a purple marble and then a white marble? What is the probability of selecting two white marbles? Is there a greater chance of selecting two white marbles in a row or two purple marbles in a row? Show your work.

*May 18, 2015*

**Physics**

aaaaaaaaaaaaaa

*March 25, 2015*

**HIS202**

northern states

*March 11, 2015*

**Chemistry**

To make 1.5 L of 0.1 M NaCl from a 2.52 M stock solution, you would need to take ____ mL of the stock solution and add _____ mL of water.

*October 1, 2014*

**math**

d2y/dx2+9y=cos2x+sin2x

*July 2, 2014*

**physics**

A stone is projected vertically to reach a maximum height 'h'. The ratio of kinetic energy to potential energy at a height 4h/5 is 1) 5:4 2) 4:5 3) 1:4 4) 4:1

*May 31, 2014*

**science HELP ASAP!!!!!!!**

Just so everyone is clear, Smile More is right. Just put in the answers in the order he has them. do not pay attention to eveything above. BECAUSE the questions in the top of this post are in the wrong order, than on the actuall assesment. -Conections user!! Answers are: 1. D ...

*March 4, 2014*

**waste water**

2.5

*November 23, 2013*

**science**

12-83. Determine the maximum height on the wall to which the firefighter can project water from the hose, if the speed of the water at the nozzle is 48ft/s

*September 30, 2013*

**Quantum physics**

How do you get number 6????

*September 7, 2013*

**Physics**

Light from a coherent monochromatic laser of wavelength λ=2.29e-4 m is incident on two slits, both of width a, separated by a distance d. The slits are placed a distance L away from a screen where L≫d and L≫a. The diffraction/interference intensity is plotted ...

*June 17, 2013*

**Physics**

A circuit is composed of a capacitor C=3 μF, two resistors both with resistance R=69 Ohm, an inductor L=6.00e-2 H, a switch S, and a battery V=25 V. The internal resistance of the battery can be ignored . Reminder: The "L=x.xxenn H" notation means "L=x.xx&...

*June 17, 2013*

**Physics**

7) a) lambda/0.5 b) lambda/0.125 Please question 3, 5, 8

*June 15, 2013*

**Physics**

b) -sigma/(2*epsilon_0)-rho*(D- d)/(2*epsilon_0) +rho*d/(2*epsilon_0)

*June 15, 2013*

**Physics**

Please, Question 3

*June 15, 2013*

**Physics**

a) (sigma/(2*epsilon_0))-(rho*D/(2*epsilon_0)) c)-sigma/(2*epsilon_0)+(rho*D/(2*epsilon_0))

*June 15, 2013*

**Physics**

Thank you so much! Question 10??

*June 15, 2013*

**Physics**

Please me, question 5

*June 15, 2013*

**Physics**

How I can know my denominator watching my grahp BG?

*June 15, 2013*

**Physics**

anyone for question 3 please??????

*June 15, 2013*

**Physics**

Please, Q10?

*June 15, 2013*

**6th grade math**

type in "square roots" and "practice square roots" into google. click the first link that pops up. :)

*May 2, 2013*

**algebra**

why did you multiply it 5, 2, and 10 times? like why is it 35^5, 26^2, and 10^10?

*May 2, 2013*

**math(Trigonometry)**

can give me a further and detail explanation where did the theta on the 5 and the formula on changing the cos theta.

*February 4, 2013*

**math(Trigonometry)**

2cos^2 theta + 5 sin theta - 4 = 0

*February 4, 2013*

**Math(Trigonometry)**

kos^2 theta - sin^2 theta = 0.25

*February 2, 2013*

**Chemistry**

niyyyiiigero

*January 3, 2013*

**chemistry**

how can you do this one?

*December 14, 2012*

**Chemistry**

gallium level*10^-2) what is this?

*December 14, 2012*

**geometry**

an arrow pointing up

*December 10, 2012*

**chemistry**

4.05 g of an unknown gas at 73 °C and 1.00 atm is stored in a 2.25-L flask.

*December 2, 2012*

**PHYSICS**

What causes acid rain? Can you think of a way acid rain could be produced even without industrial pollution? [Hint: Plants produce carbon dioxide, Co2, which reacts with rainwater to produce bicarbonate ions, HCO 3-.] Give one reaction that produces acid rain using industrial ...

*November 30, 2012*

**english**

What are the themes in the short story Clothes by Chitra Divakaruni?

*November 29, 2012*

**science**

what ph is an acid

*November 7, 2012*

**Chemistry**

I have a 40 ml solution of pH 4.36. I need to make this solution at pH 8.5 by adding extra 10 ml of HCl and NaOH. Thanks

*August 6, 2012*

**Chemistry**

I want to make solutions of pH 3.5, 4.5, 6.5, 8.5 and 10.5 from 0.1 M HCl and 0.1 M NaOH. how many ml shall I take from each solution to make these pH levels?

*July 13, 2012*

**Physics/music**

if you stand at one side os a stage with hard parallel side walls 17m apart and make a handclap, how often do the flutter echoes arrive?

*April 30, 2012*

**Physics/ Music**

Suppose you make a tape recording of a male voice singing slowly and playing it back at double speed. What will happen to the pitch of each note? What will happen to the formant frequencies of the vowels? Will it merely sound like a woman singing fast?

*April 30, 2012*

**DYNAMICS**

a particle moves on a circular path of 20 ft radius so that its arc distance from a fixed point of the path is given by s= 4 t^2-10t where a is in feet and t is in seconds. compute the total acceleration at the end of 2 sec.

*April 27, 2012*

**dynamics**

at the bottom of a loop the speed of an airplane is 400 mph. this causes a normal acceleration of 9 g ft/sec^2, determine the radius of the loop

*April 27, 2012*

**Music Physic**

The trombone's low B flat 2 is played with the slide in first position. What is its effective length, that is the length of an idealized closed tube with the same second mode frequency? Estimate how far the slide should be moved to reach second position in order to play A2...

*April 19, 2012*

**Music Physics**

The clarinet's lowest note is D3, 147 Hz. What is its effective length, that is, the length of an idealized closed pipe that has this frequency for its first mode? Explain why this is less than the actual length of the instrument?

*April 19, 2012*

**Music Physics**

Given that the oboe's lowest note is B flat 3 and its length approximately 64 cm, what length would you expect for the bassoon, whose lowest note is B flat 1? What length for the contrabassoon, lowest note b flat 0?

*April 19, 2012*

**physics**

what effect did scientists originally think that the intensity of light shining on a photosensitive surface would have on electrons ejected from that surface?

*April 11, 2012*

**chemistry**

how much NaOH (in grams)do you need to weigh ouMt to make 250ml of a 0.5M naoh solution.... i got 5.0g is this right?

*February 5, 2012*

**physics**

The mass of 1 cubic meter of air at sea level is about 1.3kg. Hoe much does it weight in newtons? How much would a stack of 8000 such cubes weigh? If this total weight were all applied to an area of 1m^2, how much pressure would it produce on that surface? The answer should ...

*February 2, 2012*

**physics**

The speed of radio waves is 3*10^8m/s, the same as the speed of light. If a spacecraft transmits a radio signal with frequency 3*10^9Hz, what is the wavelength of those waves?

*February 2, 2012*

**Physics**

A charge of 6.0 mC is to be split into two parts that are then separated by 3.00 mm. What is the maximum possible magnitude of the electrostatic force between those two parts?

*February 2, 2012*

**physics**

how to solve it?

*January 22, 2012*

**physics**

so what would that last problem be ?

*January 22, 2012*

**physics**

A meteor streaking through the night sky is located with radar. At point A its coordinates are (5.20km,1.20km), and 1.16s later its has moved to point B with coordinates (6.08km, 0.900km ). a) find the x comonent of it average velocity between A and B. .759km/s b) y= .259 km/s...

*January 22, 2012*

**chemistry**

a given mass of hydrogen occupies 40.0L at 700 torr. what volume will it occupy at 930 torr

*November 17, 2011*

**physicsssss**

A mass m = 4 kg hangs on the end of a massless rope L = 2.02 m long. The pendulum is held horizontal and released from rest. 1)How fast is the mass moving at the bottom of its path? 2)What is the magnitude of the tension in the string at the bottom of the path? 3)If the ...

*October 8, 2011*

**physicssss**

A mass m = 73 kg slides on a frictionless track that has a drop, followed by a loop-the-loop with radius R = 17.9 m and finally a flat straight section at the same height as the center of the loop (17.9 m off the ground). Since the mass would not make it around the loop if ...

*October 8, 2011*

**physicssssss**

A block with mass m = 14 kg rests on a frictionless table and is accelerated by a spring with spring constant k = 4545 N/m after being compressed a distance x1 = 0.515 m from the spring’s unstretched length. The floor is frictionless except for a rough patch a distance d...

*October 8, 2011*

**Chemistry**

0.19M

*October 2, 2011*

**physicsssss**

A child is in danger of drowning in the Merimac river. The Merimac river has a current of 3.1 km/hr to the east. The child is 0.6 km from the shore and 2.5 km upstream from the dock. A rescue boat with speed 24.8 km/hr (with respect to the water) sets off from the dock at the...

*September 21, 2011*

**physics**

thats wrong.

*September 19, 2011*

**physics**

Ted Williams hits a baseball with an initial velocity of 120 miles per hour (176 ft/s) at an angle of è = 35 degrees to the horizontal. The ball is struck 3 feet above home plate. You watch as the ball goes over the outfield wall 420 feet away and lands in the ...

*September 19, 2011*

**physics**

Julie throws a ball to her friend Sarah. The ball leaves Julie's hand a distance 1.5 meters above the ground with an initial speed of 12 m/s at an angle 35 degrees; with respect to the horizontal. Sarah catches the ball 1.5 meters above the ground. 1)What is the horizontal...

*September 17, 2011*

**physics**

Ted Williams hits a baseball with an initial velocity of 120 miles per hour (176 ft/s) at an angle of è = 35 degrees to the horizontal. The ball is struck 3 feet above home plate. You watch as the ball goes over the outfield wall 420 feet away and lands in the bleachers...

*September 17, 2011*

**physics**

You are traveling on an airplane. The velocity of the plane with respect to the air is 180 m/s due east. The velocity of the air with respect to the ground is 40 m/s at an angle of 30° west of due north. 1)What is the speed of the plane with respect to the ground? 2)What ...

*September 17, 2011*

**physics**

A child is in danger of drowning in the Merimac river. The Merimac river has a current of 3.1 km/hr to the east. The child is 0.6 km from the shore and 2.5 km upstream from the dock. A rescue boat with speed 24.8 km/hr (with respect to the water) sets off from the dock at the ...

*September 17, 2011*

**math riddles for 7th grade**

what was the truck driver doing w/a load of hogs

*September 13, 2011*

**math**

You are a member of a fund raising comittee for your school. The committee is sponsoring a fair. Each member of the committee has agreed to sell 50 tickets to the fair. Student tickets are $3 each and adult tickets are $5 each. Let t represent the number of student tickets ...

*September 12, 2011*

**math**

10+4(m+2)

*September 12, 2011*

**Finance**

true

*December 1, 2010*

**math**

$3.57?

*October 10, 2010*

**pre calculus**

The conic section whose equation is x^2 - 3y^2 - 8x + 12y + 16 = 0, is in Position is I. Is this statement true or false

*March 29, 2010*

**pre calculus**

The conic section whose equation is x 2 - 3y 2 - 8x + 12y + 16 = 0, is in Position is I. Is this true or false?

*March 29, 2010*

**Pre calculus**

x^2+y ^2+ 4x + 6y - 12 = 0 how do i find the domain

*March 26, 2010*

**chem**

3.83 is answer u r certainly close

*March 4, 2010*

**math**

you should divid 48 by 6

*September 16, 2009*

**chemistry**

4.95

*April 20, 2008*

- Pages:
**1**